阅读说明：本技术 核电站开关设备灭弧室压力测量方法、装置、设备及介质 (Method, device, equipment and medium for measuring pressure of arc extinguish chamber of nuclear power station switch equipment ) 是由 辛英 张明 田彬 覃璇 于 2019-08-21 设计创作，主要内容包括：本发明涉及核电站厂用电系统技术领域,本发明公开了一种核电站开关设备灭弧室压力测量方法、装置、设备及介质,所述方法包括在待测时间点接收待测封闭SF6气室的测量指令,获取与待测时间点对应的时间常数；将待测封闭SF6气室在待测时间点的温度和时间常数输入SF6气体压力测量函数,获取待测封闭SF6气室的气体压力值,并将气体压力值与待测时间点关联；根据模型生成时间点之前的待测时间点以及与其关联的气体压力值生成预测模型；通过预测模型确定低压报警时间点并生成报警干预提示。本发明通过对封闭SF6气室内的气体进行非接触式压力监测,避免封闭SF6气室内气体压力低报警而造成的非计划设备停运、停机、停堆事件,从而减少核电站损失。(The invention relates to the technical field of nuclear power station service systems, and discloses a method, a device, equipment and a medium for measuring pressure of an arc extinguish chamber of a switch device of a nuclear power station, wherein the method comprises the steps of receiving a measurement instruction of a closed SF6 air chamber to be measured at a time point to be measured, and acquiring a time constant corresponding to the time point to be measured; inputting the temperature and the time constant of the closed SF6 gas chamber to be tested at the time point to be tested into an SF6 gas pressure measurement function, obtaining the gas pressure value of the closed SF6 gas chamber to be tested, and associating the gas pressure value with the time point to be tested; generating a prediction model according to the time point to be measured before the model generation time point and the gas pressure value associated with the time point; and determining a low-pressure alarm time point through a prediction model and generating an alarm intervention prompt. According to the invention, through carrying out non-contact pressure monitoring on the gas in the closed SF6 gas chamber, the events of unplanned equipment shutdown, shutdown and shutdown caused by low gas pressure alarm in the closed SF6 gas chamber are avoided, so that the loss of the nuclear power station is reduced.)

1. A pressure measurement method for an arc extinguish chamber of a switch device in a nuclear power station is characterized by comprising the following steps:

receiving a measurement instruction of a closed SF6 air chamber to be measured at a time point to be measured, and acquiring a time constant, which is measured by a time constant measuring circuit, of a switch arranged in the closed SF6 air chamber to be measured and corresponds to the time point to be measured;

acquiring the temperature of the closed SF6 air chamber to be measured at the time point to be measured through a temperature measuring circuit;

inputting the temperature and the time constant of the closed SF6 gas chamber to be detected into a preset SF6 gas pressure measurement function to obtain a gas pressure value of the closed SF6 gas chamber to be detected, and associating the gas pressure value with the time point to be detected;

generating a prediction model at a model generation time point according to each time point to be measured before the model generation time point and the gas pressure value associated with the time point;

and determining a low-pressure alarm time point corresponding to a preset low-pressure alarm threshold value through the prediction model, and generating an alarm intervention prompt at a prompt time point, wherein the prompt time point is determined according to the low-pressure alarm time point and a preset prompt rule.

2. The method for measuring the pressure of the arc extinguish chamber of the switching device of the nuclear power plant as claimed in claim 1, wherein after the model generation time point generates a prediction model according to each time point to be measured before the model generation time point and the gas pressure value associated with the time point, the method further comprises the following steps:

receiving a measurement instruction of the closed SF6 air chamber to be measured at a time point to be measured after the model generation time point, and acquiring an updated gas pressure value associated with the closed SF6 air chamber to be measured at the time point to be measured after the model generation time point;

updating the prediction model according to the time point to be measured after the model generation time point and the updated gas pressure value associated with the time point;

and determining a new low-pressure alarm time point corresponding to the low-pressure alarm threshold value through the updated prediction model, and generating an alarm intervention prompt at the new prompt time point, wherein the new prompt time point is determined according to the new low-pressure alarm time point and a preset prompt rule.

3. The method for measuring the pressure of the arc extinguish chamber of the switching device of the nuclear power station as claimed in claim 1, wherein the step of receiving a measurement instruction of the closed SF6 air chamber to be measured at a time point to be measured and obtaining a time constant, which is measured by a time constant measuring circuit, of a switch arranged in the closed SF6 air chamber to be measured and corresponds to the time point to be measured comprises the steps of:

receiving a measurement instruction of a closed SF6 air chamber to be measured at a time point to be measured, connecting a switch arranged in the closed SF6 air chamber to be measured into the time constant measuring circuit, and measuring a time constant corresponding to the time point to be measured and the switch arranged in the closed SF6 air chamber to be measured by the time constant measuring circuit.

4. The method for measuring the pressure of the arc extinguish chamber of the switching equipment of the nuclear power plant as claimed in claim 1, wherein the SF6 gas pressure measurement function is as follows:

wherein:

p is the gas pressure value of the closed SF6 gas chamber to be detected;

k is Boersmann constant, i.e. 1.38X 10^-23J/K；

t is the temperature of the closed SF6 air chamber to be measured at the time point to be measured;

d is the gap between the fracture parts of the switches arranged in the closed SF6 air chamber to be tested;

s is the area of a fracture polar plate of a switch arranged in the closed SF6 gas chamber to be tested;

τ is the time constant;

r is the loop resistance of the time constant measuring circuit;

ε₀absolute dielectric constant of vacuum, i.e. 8.85X 10^-12F/m；

Alpha is SF6 gas molecular radius, namely 2.385X 10^-10m。

5. The method for measuring the pressure of the arc extinguish chamber of the switching device of the nuclear power plant as claimed in claim 1, wherein a plurality of the prompt time points are arranged before the low-voltage alarm time point, each prompt time point is associated with one prompt grade, and each prompt grade is associated with one prompt mode;

the generating of the alarm intervention prompt at the prompt time point includes:

acquiring the prompt grade associated with the prompt time point and a prompt mode of the prompt grade;

and generating an alarm intervention prompt at the prompt time point according to the prompt mode.

6. The utility model provides a nuclear power station switchgear explosion chamber pressure measurement device which characterized in that includes:

the first measurement module is used for receiving a measurement instruction of a to-be-measured closed SF6 air chamber at a to-be-measured time point and acquiring a time constant, measured by a time constant measurement circuit, of a switch arranged in the to-be-measured closed SF6 air chamber, wherein the time constant corresponds to the to-be-measured time point;

the second measurement module is used for acquiring the temperature of the closed SF6 air chamber to be measured at the time point to be measured through a temperature measurement circuit;

a first obtaining module, configured to input the temperature and the time constant of the sealed SF6 gas chamber to be tested into a preset SF6 gas pressure measurement function, so as to obtain a gas pressure value of the sealed SF6 gas chamber to be tested, and associate the gas pressure value with the time point to be tested;

the generation module is used for generating a prediction model at a model generation time point according to each time point to be measured before the model generation time point and the gas pressure value associated with the time point;

the first alarm module is used for determining a low-pressure alarm time point corresponding to a preset low-pressure alarm threshold value through the prediction model and generating an alarm intervention prompt at a prompt time point, wherein the prompt time point is determined according to the alarm time point and a preset prompt rule.

7. The apparatus for measuring the pressure in the arc extinguishing chamber of the nuclear power plant switching device according to claim 6, further comprising:

a second obtaining module, configured to receive, at a time point to be measured after the model generation time point, a measurement instruction of a closed SF6 gas chamber to be measured, and obtain an updated gas pressure value associated with the closed SF6 gas chamber to be measured at the time point to be measured after the model generation time point;

the updating module is used for updating the prediction model according to the time point to be measured after the model generating time point and the updating gas pressure value related to the time point;

and the second alarm module is used for determining a new low-pressure alarm time point corresponding to the low-pressure alarm threshold value through the updated prediction model and generating an alarm intervention prompt at the new prompt time point, wherein the new prompt time point is determined according to the new alarm time point and a preset prompt rule.

8. The device for measuring the pressure of the arc extinguish chamber of the switching equipment of the nuclear power plant as claimed in claim 6, wherein the first measuring module is further configured to receive a measurement command of the closed SF6 air chamber to be measured at a time point to be measured, connect the switch arranged in the closed SF6 air chamber to be measured into the time constant measuring circuit, and measure the time constant corresponding to the time point to be measured by the switch arranged in the closed SF6 air chamber to be measured through the time constant measuring circuit.

9. The apparatus for measuring the pressure of an arc extinguishing chamber of a switchgear of a nuclear power plant as claimed in claim 6, wherein the SF6 gas pressure measurement function is:

wherein:

p is the gas pressure value of the closed SF6 gas chamber to be detected;

k is Boersmann constant, i.e. 1.38X 10^-23J/K；

t is the temperature of the closed SF6 air chamber to be measured at the time point to be measured;

d is the gap between the fracture parts of the switches arranged in the closed SF6 air chamber to be tested;

s is the area of a fracture polar plate of a switch arranged in the closed SF6 gas chamber to be tested;

τ is the time constant;

r is the loop resistance of the time constant measuring circuit;

ε₀absolute dielectric constant of vacuum, i.e. 8.85X 10^-12F/m；

Alpha is SF6 gas molecular radius, namely 2.385X 10^-10m。

10. The nuclear power plant switchgear arc chute pressure measurement device of claim 6, wherein the first alarm module comprises:

the third acquisition module is used for acquiring the prompt grade associated with the prompt time point and the prompt mode of the prompt grade;

and the prompt module is used for generating an alarm intervention prompt at the prompt time point according to the prompt mode.

11. Computer arrangement comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor, when executing the computer program, carries out the steps of the method for measuring the pressure in an arc extinguishing chamber of a switchgear of a nuclear power plant according to any of claims 1 to 5.

12. A computer-readable storage medium, in which a computer program is stored, which, when being executed by a processor, carries out the steps of the method for measuring the pressure in an arc extinguishing chamber of a switchgear of a nuclear power plant according to any one of claims 1 to 5.

Technical Field

The invention relates to the technical field of nuclear power station service power systems, in particular to a method, a device, equipment and a medium for measuring pressure of an arc extinguish chamber of switching equipment of a nuclear power station.

Background

At present, medium voltage switchgear is an important component of a power distribution system of a nuclear power plant, wherein an arc extinguish chamber is a core component of the medium voltage switchgear, and a switch of the medium voltage switchgear is arranged in the arc extinguish chamber, so that when the switch is switched on and off, the switch is prevented from being re-ignited, and therefore burning loss and corrosion to the switch are small. The arc-extinguishing chamber is a gas chamber which is poured by epoxy resin and filled with SF6 (sulfur hexafluoride) gas, therefore, the gas in the closed SF6 gas chamber has to keep a certain gas pressure, an alarm is triggered when the pressure is low, and a switch in the closed SF6 gas chamber needs to be replaced in time when the pressure is low and the alarm is given, otherwise, the performance of the switch cannot be ensured. Since such a closed SF6 gas cell has high sealing performance and no pressure measurement valve is provided therein, the gas pressure in the gas cell cannot be measured and predicted by using a conventional contact-type pressure measurement method. Along with the increasing of the running time of the air chamber, the aging of the performance of the sealing glue of the joint surface of the air chamber and the performance of the sealing ring, the natural leakage rate of the switch is increased, so that the pressure of the switch is required to be monitored, and the fine management of the equipment is realized. In the prior art, the pressure cannot be measured, and the alarm can only be carried out when the air pressure is low, so that unplanned equipment shutdown, even shutdown and shutdown events can be caused, and great loss is caused.

Disclosure of Invention

The invention provides a method, a device, equipment and a medium for measuring the pressure of an arc extinguish chamber of switch equipment in a nuclear power station, and the method, the device, the equipment and the medium can be used for carrying out non-contact pressure monitoring on gas in a closed SF6 gas chamber, so that the unplanned equipment shutdown, shutdown and shutdown events caused by low gas pressure alarm in the closed SF6 gas chamber are avoided, the loss of the nuclear power station is reduced, and the fine management of the equipment is realized.

A pressure measurement method for an arc extinguish chamber of a switching device of a nuclear power station comprises the following steps:

receiving a measurement instruction of a closed SF6 air chamber to be measured at a time point to be measured, and acquiring a time constant, which is measured by a time constant measuring circuit, of a switch arranged in the closed SF6 air chamber to be measured and corresponds to the time point to be measured;

acquiring the temperature of the closed SF6 air chamber to be measured at the time point to be measured through a temperature measuring circuit;

inputting the temperature and the time constant of the closed SF6 gas chamber to be detected into a preset SF6 gas pressure measurement function to obtain a gas pressure value of the closed SF6 gas chamber to be detected, and associating the gas pressure value with the time point to be detected;

generating a prediction model at a model generation time point according to each time point to be measured before the model generation time point and the gas pressure value associated with the time point;

and determining a low-pressure alarm time point corresponding to a preset low-pressure alarm threshold value through the prediction model, and generating an alarm intervention prompt at a prompt time point, wherein the prompt time point is determined according to the alarm time point and a preset prompt rule.

A pressure measurement device for an arc extinguish chamber of switch equipment in a nuclear power station comprises:

the first measurement module is used for receiving a measurement instruction of a to-be-measured closed SF6 air chamber at a to-be-measured time point and acquiring a time constant, measured by a time constant measurement circuit, of a switch arranged in the to-be-measured closed SF6 air chamber, wherein the time constant corresponds to the to-be-measured time point;

the second measurement module is used for acquiring the temperature of the closed SF6 air chamber to be measured at the time point to be measured through a temperature measurement circuit;

a first obtaining module, configured to input the temperature and the time constant of the sealed SF6 gas chamber to be tested into a preset SF6 gas pressure measurement function, so as to obtain a gas pressure value of the sealed SF6 gas chamber to be tested, and associate the gas pressure value with the time point to be tested;

the generation module is used for generating a prediction model at a model generation time point according to each time point to be measured before the model generation time point and the gas pressure value associated with the time point;

the first alarm module is used for determining a low-pressure alarm time point corresponding to a preset low-pressure alarm threshold value through the prediction model and generating an alarm intervention prompt at a prompt time point, wherein the prompt time point is determined according to the alarm time point and a preset prompt rule.

A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the method for measuring the pressure of the arc extinguishing chamber of the switchgear of a nuclear power plant when executing the computer program.

A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method for measuring pressure in an arc extinguishing chamber of a switchgear of a nuclear power plant as described above.

The invention obtains the time constant of a switch arranged in a closed SF6 gas chamber to be detected and corresponding to the time point to be detected, which is measured by a time constant measuring circuit, by receiving a measuring instruction of the closed SF6 gas chamber to be detected at the time point to be detected, obtains the temperature of the closed SF6 gas chamber to be detected at the time point to be detected by a temperature measuring circuit, inputs the temperature of the closed SF6 gas chamber to be detected and the time constant into a preset SF6 gas pressure measuring function to obtain the gas pressure value of the closed SF6 gas chamber to be detected, associates the gas pressure value with the time point to be detected, generates a prediction model at a model generating time point according to each time point to be detected before the model generating time point and the gas pressure value associated with the time point to be detected, determines a low-pressure alarm time point corresponding to a preset low-pressure alarm threshold value by the prediction model, and generating an alarm intervention prompt at a prompt time point, wherein the prompt time point is determined according to the alarm time point and a preset prompt rule. Therefore, the gas in the closed SF6 gas chamber is subjected to non-contact pressure monitoring, and the low-pressure alarm time point corresponding to the preset low-pressure alarm threshold value is determined, so that the early warning of the low-pressure alarm state is realized, the unplanned equipment shutdown, shutdown and shutdown events caused by the low-pressure alarm of the gas in the closed SF6 gas chamber are avoided, the loss of the nuclear power station is reduced, and the fine management of the equipment is realized.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a flow chart of a method for measuring pressure of an arc extinguish chamber of a switching device of a nuclear power plant in one embodiment of the invention;

FIG. 2 is a flow chart of a method for measuring pressure of an arc extinguish chamber of a switching device of a nuclear power plant in another embodiment of the invention;

fig. 3 is a flowchart of step S50 in the method for measuring the pressure of the arc extinguish chamber of the switching device in the nuclear power plant according to an embodiment of the present invention;

FIG. 4 is a schematic block diagram of a pressure measurement device for an arc extinguish chamber of a nuclear power plant switching device in an embodiment of the invention;

FIG. 5 is a schematic block diagram of a pressure measurement device for an arc extinguish chamber of a switching device of a nuclear power plant in another embodiment of the invention;

FIG. 6 is a schematic block diagram of a first alarm module in a pressure measurement device of an arc extinguish chamber of a nuclear power plant switching device in an embodiment of the invention;

FIG. 7 is a schematic diagram of a computer device in an embodiment of the invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a method, a device, equipment and a medium for measuring the pressure of an arc extinguish chamber of switch equipment in a nuclear power station, which realize non-contact pressure monitoring of gas in a closed SF6 gas chamber, and avoid unplanned equipment shutdown, shutdown and shutdown events caused by low gas pressure alarm in the closed SF6 gas chamber, thereby reducing the loss of the nuclear power station and realizing the fine management of the equipment.

In an embodiment, as shown in fig. 1, a method for measuring pressure of an arc extinguish chamber of a switching device in a nuclear power plant is provided, which includes the following steps S10-S50:

and S10, receiving a measurement instruction of the closed SF6 air chamber to be measured at the time point to be measured, and acquiring the time constant, measured by the time constant measuring circuit, of the switch arranged in the closed SF6 air chamber to be measured and the time point to be measured.

Understandably, the time point to be detected may be set according to the requirement without being limited to a specific overhaul time point or overhaul time interval, such as overhaul time 09: 00 or the maintenance intervals are one week, one month, one year, etc. In this embodiment, the to-be-measured closed SF6 gas chamber may be one to-be-measured closed SF6 gas chamber, or a group of to-be-measured closed SF6 gas chambers, that is, a plurality of to-be-measured closed SF6 gas chambers.

Understandably, receive the measurement instruction of the sealed SF6 air chamber that awaits measuring at the time point of awaiting measuring, will the switch that sets up in the sealed SF6 air chamber that awaits measuring inserts among the time constant measuring circuit, receive at the time point of awaiting measuring promptly during the test instruction of the sealed SF6 air chamber that awaits measuring, will the switch that sets up in the sealed SF6 air chamber that awaits measuring is placed the off-state in, and will the switch that sets up in the sealed SF6 air chamber that awaits measuring with time constant measuring circuit switch-on forms the return circuit.

The time constant is a constant of a time course in which a voltage across the flat capacitor undergoes a transient reaction, and it is understood that, in a circuit formed by the loop resistance and the flat capacitor, the time constant is a product of the loop resistance and the flat capacitor, and may be calculated by a curve method according to charge and discharge characteristics of the flat capacitor, that is, when the voltage across the flat capacitor rises from zero to 0.63 times of the supply power voltage during charging of the flat capacitor, the time used in the process is the time constant of the flat capacitor, or when the voltage across the flat capacitor falls from the supply power voltage to 0.37 times of the supply power voltage during discharging of the flat capacitor, the time used in the process is the time constant of the flat capacitor. In this embodiment, the time constant measuring circuit is connected to the two-terminal interfaces of the switch arranged in the closed SF6 air chamber to be measured, that is, approximately connected to the two terminals of the plate capacitor, and the time constant measuring circuit includes a power supply, a voltage collecting device for measuring the voltage at the two terminals of the switch arranged in the closed SF6 air chamber to be measured, a loop resistor, and a time collecting device. The supply power is used for providing circuit voltage, preferably the supply power is a high-frequency voltage power, the charging and discharging characteristics of the flat capacitor are more obvious at the moment, the voltage acquisition device is used for measuring the voltages at two ends of the switch arranged in the closed SF6 air chamber to be measured, the range of the voltage is at least zero to the voltage value of the supply power, the loop resistor is measured before being connected into the circuit, for example, the resistance value of the loop resistor is directly measured through a universal meter, and the time acquisition device is used for acquiring the time constant of the switch arranged in the closed SF6 air chamber to be measured during charging and discharging operation and the time constant of the switch during discharging.

In this embodiment, the time constant measuring circuit may measure a time constant of a switch arranged in the closed SF6 gas chamber to be tested during charging or a time constant of a switch arranged in the closed SF6 gas chamber to be tested during discharging each time of charging and discharging operations, and on one hand, an average value of all the time constants of the charging and the discharging may be taken and marked as a time constant of the switch arranged in the closed SF6 gas chamber to be tested corresponding to the time point to be tested; on the other hand, the time constants during all the charging and the time constants during all the discharging may be removed and averaged, and the average value is marked as the time constant corresponding to the time point to be measured of the switch arranged in the closed SF6 gas chamber to be measured, so that the error may be reduced.

And S20, acquiring the temperature of the closed SF6 air chamber to be measured at the time point to be measured through a temperature measuring circuit.

Wherein, temperature measurement circuit includes temperature sensor, temperature sensor is used for measuring the temperature of the closed SF6 air chamber that awaits measuring, temperature sensor can be contact temperature sensor, through temperature sensor inserts among the temperature measurement circuit, acquire the closed SF6 air chamber that awaits measuring is in the temperature of the time point that awaits measuring.

In an embodiment, the temperature sensor is a contact temperature sensor, the temperature sensor is arranged in the to-be-detected closed SF6 air chamber, the temperature sensor interface is connected into the temperature measuring circuit through the to-be-detected closed SF6 air chamber, and the temperature of the to-be-detected closed SF6 air chamber at the to-be-detected time point is obtained. Thus, the temperature measurement of the closed SF6 air chamber to be measured is more accurate.

In an embodiment, temperature sensor is contact temperature sensor when the outer wall of the sealed SF6 air chamber that awaits measuring is the good material of heat-conduction, just the sealed SF6 air chamber that awaits measuring is for not setting up during temperature sensor's enclosed construction, because temperature sensor can't put into this enclosed construction, consequently can with temperature sensor installs the outer wall of the sealed SF6 air chamber that awaits measuring is through hugging closely the outer wall is measured the outer wall temperature will again outer wall temperature increases temperature compensation (temperature loss among the compensation conduction process) and then acquires the sealed SF6 air chamber that awaits measuring is in the temperature of time point of awaiting measuring, temperature compensation can acquire through the conduction heat experiment of outer wall material. Therefore, the temperature of the closed SF6 air chamber to be measured can be measured and obtained in a simple mode, and the cost is low.

And S30, inputting the temperature of the closed SF6 gas chamber to be detected and the time constant into a preset SF6 gas pressure measurement function so as to obtain a gas pressure value of the closed SF6 gas chamber to be detected, and associating the gas pressure value with the time point to be detected.

Understandably, the temperature of the sealed SF6 gas chamber to be tested and the time constant are input into a preset SF6 gas pressure measurement function, so that the gas pressure value of the sealed SF6 gas chamber to be tested is obtained, and the gas pressure value is associated with the time point to be tested.

In one embodiment, the SF6 gas pressure measurement function is:

wherein:

p is the gas pressure value of the closed SF6 gas chamber to be detected;

k is Boersmann constant, i.e. 1.38X 10^-23J/K；

t is the temperature of the closed SF6 air chamber to be measured at the time point to be measured;

d is the gap between the fractures of the switches arranged in the closed SF6 air chamber to be tested, and because the switches arranged in the closed SF6 air chamber to be tested in the disconnected state are similar to a flat capacitor, the gap between the fractures of the switches arranged in the closed SF6 air chamber to be tested is obtained according to the factory parameters of the closed SF6 air chamber to be tested;

the area of a fracture polar plate of a switch arranged in the to-be-tested closed SF6 air chamber is obtained through factory parameters of the to-be-tested closed SF6 air chamber because the switch arranged in the to-be-tested closed SF6 air chamber in a disconnected state is similar to a flat capacitor;

τ is the time constant;

r is a resistance value of a loop resistor of the time constant measurement circuit, which is measured before the circuit is connected, for example, the resistance value of the loop resistor is directly measured by a multimeter;

ε₀absolute dielectric constant of vacuum, i.e. 8.85 × 10-¹²F/m；

Alpha is the molecular radius of SF6 gas, i.e. 2.385X 10-¹⁰m。

In another embodiment, since d (the gap between the fractures of the switches arranged in the closed SF6 gas chamber to be tested) and S (the area of the fracture plate of the switch arranged in the closed SF6 gas chamber to be tested) do not change during use, d/S in the SF6 gas pressure measurement function is an inherent constant a of the plate capacitor, that is, the inherent constant a is d/S, and the inherent constant can be obtained by a preset constant function, where the inherent constant function is:

A＝εR/τ₀

wherein:

a is the intrinsic constant of the plate capacitor;

r is a resistance value of the loop resistor of the time constant measurement circuit, which is measured and obtained before the loop resistor is connected to the circuit, for example, the resistance value of the loop resistor is directly measured by a multimeter;

ε is the dielectric constant of air, 1.00053F/m;

τ₀and for the time constant of the to-be-detected closed SF6 air chamber under the air medium, when the to-be-detected closed SF6 air chamber is not filled with SF6 gas and under the air medium, the time constant of the to-be-detected closed SF6 air chamber under the air medium is obtained through an experiment by the time constant measuring circuit.

And S40, generating a prediction model according to each measured time point before the model generation time point and the gas pressure value related to the measured time point at the model generation time point.

Understandably, the model generation time point is a time point at which the prediction model is generated. At a model generation time point, acquiring each time point to be measured before the model generation time point and a gas pressure value associated with the time point, forming a gas pressure-time curve according to each time point to be measured before the model generation time point and the gas pressure value associated with the time point, deriving a curve function according to a corresponding relation between gas pressure and time in the gas pressure-time curve, and inputting the curve function into the prediction model, thereby generating the prediction model.

S50, determining an alarm time point corresponding to a preset low-pressure alarm threshold value through the prediction model, and generating an alarm intervention prompt at a prompt time point, wherein the prompt time point is determined according to the alarm time point and a preset prompt rule.

Understandably, the preset low-pressure alarm threshold may be a gas pressure value when the sealed SF6 gas chamber to be detected alarms at low pressure, or may be larger than a gas pressure value when the sealed SF6 gas chamber to be detected alarms at low pressure, so that preparation work when the sealed SF6 gas chamber to be detected alarms at low pressure can be performed in advance, a low-pressure alarm time point corresponding to the preset low-pressure alarm threshold can be determined through the prediction model, that is, the preset low-pressure alarm threshold is input into the prediction model, a low-pressure alarm time point corresponding to the preset low-pressure alarm threshold can be output, the prompt time point is determined according to the low-pressure alarm time point and the preset prompt rule, preferably, the preset prompt rule can divide the prompt time points of different levels according to the time length of the low-pressure alarm time point, that is, each prompt time point is associated with a prompt level, and each prompt level is associated with a prompt mode, wherein the prompt mode includes but is not limited to mail notification, short message notification, telephone notification, and the like. And generating an alarm intervention prompt at a prompt time point, namely acquiring the prompt grade associated with the prompt time point and a prompt mode of the prompt grade, and generating the alarm intervention prompt at the prompt time point according to the prompt mode.

Therefore, the gas in the closed SF6 gas chamber is subjected to non-contact pressure monitoring, and the low-pressure alarm time point corresponding to the preset low-pressure alarm threshold value is determined, so that the early warning of the low-pressure alarm state is realized, the unplanned equipment shutdown, shutdown and shutdown events caused by the low-pressure alarm of the gas in the closed SF6 gas chamber are avoided, the loss of the nuclear power station is reduced, and the fine management of the equipment is realized.

In an embodiment, as shown in fig. 2, after the step S40, that is, after the model generation time point generates the prediction model according to each measured time point before the model generation time point and the gas pressure value associated therewith, the method further includes:

and S60, receiving a measurement instruction of the closed SF6 gas chamber to be tested at a time point to be tested after the model generation time point, and acquiring an updated gas pressure value associated with the closed SF6 gas chamber to be tested at the time point to be tested after the model generation time point.

Understandably, the model generates the time point to be measured after the time point, namely generates the prediction model, and then exists after the time point to be measured, the measurement instruction of the closed SF6 air chamber to be measured is received, the time constant measurement circuit measures the time constant corresponding to the time point to be measured and the switch arranged in the closed SF6 air chamber to be measured, the temperature measurement circuit obtains the temperature of the closed SF6 air chamber to be measured at the time point to be measured, and the temperature of the closed SF6 air chamber to be measured and the time constant are input into the preset SF6 gas pressure measurement function, so as to obtain the updated gas pressure value associated with the time point to be measured after the time point to be generated by the model of the closed SF6 air chamber to be measured.

And S70, updating the prediction model according to the time point to be measured after the model generation time point and the update gas pressure value related to the time point.

Understandably, the time point to be measured after the model generation time point and the updated gas pressure value associated therewith are input to the prediction model, the prediction model is updated according to the time point to be measured after the model generation time point and the updated gas pressure value associated therewith to form an updated gas pressure-time curve, an updated curve function can be derived according to the corresponding relationship between the gas pressure and the curve in the updated gas pressure-time curve, and the updated curve function is input to the prediction model, so that a new prediction model is generated, that is, the prediction model is updated.

And S80, determining a new low-pressure alarm time point corresponding to the low-pressure alarm threshold value through the updated prediction model, and generating an alarm intervention prompt at the new prompt time point, wherein the new prompt time point is determined according to the new low-pressure alarm time point and a preset prompt rule.

Understandably, a new low-pressure alarm time point corresponding to the preset low-pressure alarm threshold value can be determined through the updated prediction model, that is, the preset low-pressure alarm threshold value is input into the updated prediction model, then a new low-pressure alarm time point corresponding to the preset low-pressure alarm threshold value can be output, and the prompt time point is updated according to the new low-pressure alarm time point and the preset prompt rule, that is, the new prompt time point replaces the prompt time point determined before the new prompt time point. And generating an alarm intervention prompt at a new prompt time point, namely acquiring the prompt grade associated with the new prompt time point and a prompt mode of the prompt grade, and generating the alarm intervention prompt at the new prompt time point according to the prompt mode.

Therefore, the prediction model can be continuously updated, the accuracy is higher and higher, and the prediction time point is more and more accurate.

In another embodiment, the receiving a measurement instruction of a closed SF6 air chamber to be measured at a time point to be measured, and obtaining a time constant, which is measured by a time constant measurement circuit, of a switch arranged in the closed SF6 air chamber to be measured and corresponds to the time point to be measured includes: receiving a measurement instruction of a closed SF6 air chamber to be measured at a time point to be measured, connecting a switch arranged in the closed SF6 air chamber to be measured into the time constant measuring circuit, and measuring a time constant corresponding to the time point to be measured and the switch arranged in the closed SF6 air chamber to be measured by the time constant measuring circuit.

In another embodiment, as shown in fig. 3, in step S50, a plurality of the prompt time points are set before the low-voltage alarm time point, and each prompt time point is associated with a prompt level, and each prompt level is associated with a prompt mode; the generating of the alarm intervention prompt at the prompt time point includes:

s501, obtaining the prompt level associated with the prompt time point and the prompt mode of the prompt level.

Understandably, the prompt level associated with the prompt time point and the prompt mode of the prompt level can be realized in various modes, such as: the distance between the alarm time points and the prompt time points is 1 week, the associated prompt level is a high-grade alarm level, and the associated prompt mode is that a mail notification contact person with an emergency notification subject is sent every day and a window interface pops up a prompt interface every day to remind; a prompting time point which is 1 month away from the alarm time point is arranged, the associated prompting grade is a middle-grade alarm grade, and the associated prompting mode is that a mail notification contact with a priority processing subject is sent every week and a prompting interface pops up every week on a window interface for prompting; the reminding time point is 6 months away from the alarm time point, the associated reminding level is a low-level alarm level, and the associated reminding mode is that a mail notification contact with a reminding processing theme is sent every month and a window interface pops up a reminding interface every month for reminding; and a time point of a period of purchasing the closed SF6 gas chamber is further arranged from the alarm time point, the associated prompt level is a reminding alarm level, and the associated prompt mode is that a mail notification contact with a theme containing reminding purchasing is sent every 3 months, a window interface pops up a prompt interface every 3 months for reminding, and the like.

And S502, generating an alarm intervention prompt at the prompt time point according to the prompt mode.

Understandably, the prompting content and the mode of the alarm intervention prompt can be various, such as: the prompt content may be a display showing "there are XX days to be changed in time from the XXXX time point"; the prompt may be a display showing "need to change in time at XXXX point in time"; the prompting mode can be used for reporting an alarm intervention prompt through sound, and the like.

Therefore, the alarm intervention prompt is generated at the prompt time point, so that the equipment is managed finely, and sufficient intervention preparation is made.

It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

The invention provides a pressure measuring device for an arc extinguish chamber of a switching device of a nuclear power station, which corresponds to the pressure measuring method for the arc extinguish chamber of the switching device of the nuclear power station in the embodiment. As shown in fig. 4, the pressure measuring device for the arc extinguish chamber of the switching device of the nuclear power station comprises:

the first measurement module 11 is configured to receive a measurement instruction of the closed SF6 air chamber to be measured at a time point to be measured, and obtain a time constant, which is measured by the time constant measurement circuit, of a switch arranged in the closed SF6 air chamber to be measured and the time constant corresponding to the time point to be measured.

And the second measurement module 12 is configured to obtain, through the temperature measurement circuit, the temperature of the to-be-measured closed SF6 air chamber at the to-be-measured time point.

The first obtaining module 13 is configured to input the temperature of the sealed SF6 gas chamber to be tested and the time constant into a preset SF6 gas pressure measurement function, so as to obtain a gas pressure value of the sealed SF6 gas chamber to be tested, and associate the gas pressure value with the time point to be tested.

And the generation module 14 is used for generating a prediction model at the model generation time point according to each time point to be measured before the model generation time point and the gas pressure value related to the time point.

The first alarm module 15 is configured to determine a low-pressure alarm time point corresponding to a preset low-pressure alarm threshold through the prediction model, and generate an alarm intervention prompt at a prompt time point, where the prompt time point is determined according to the alarm time point and a preset prompt rule.

In an embodiment, as shown in fig. 5, the device for measuring the pressure of the arc extinguish chamber of the switching device in the nuclear power plant further includes:

a second obtaining module 16, configured to receive, at a time point to be measured after the model generation time point, a measurement instruction of the sealed SF6 gas chamber to be measured, and obtain an updated gas pressure value associated with the sealed SF6 gas chamber to be measured at the time point to be measured after the model generation time point.

And the updating module 17 is configured to update the prediction model according to the time point to be measured after the model generation time point and the updated gas pressure value associated with the time point.

And the second alarm module 18 is configured to determine a new low-pressure alarm time point corresponding to the low-pressure alarm threshold value through the updated prediction model, and generate an alarm intervention prompt at the new prompt time point, where the new prompt time point is determined according to the new alarm time point and a preset prompt rule.

In an embodiment, the first measurement module 11 is further configured to receive a measurement instruction of the closed SF6 air chamber to be measured at a time point to be measured, access the switch disposed in the closed SF6 air chamber to be measured to the time constant measurement circuit, and measure, by the time constant measurement circuit, a time constant corresponding to the time point to be measured of the switch disposed in the closed SF6 air chamber to be measured.

In one embodiment, the SF6 gas pressure measurement function is:

wherein:

p is the gas pressure value of the closed SF6 gas chamber to be detected;

k is Boersmann constant, i.e. 1.38X 10^-23J/K；

t is the temperature of the closed SF6 air chamber to be measured at the time point to be measured;

d is the gap between the fractures of the switches arranged in the closed SF6 air chamber to be tested, and because the switches arranged in the closed SF6 air chamber to be tested in the disconnected state are similar to a flat capacitor, the gap between the fractures of the switches arranged in the closed SF6 air chamber to be tested is obtained according to the factory parameters of the closed SF6 air chamber to be tested;

the area of a fracture polar plate of a switch arranged in the to-be-tested closed SF6 air chamber is obtained through factory parameters of the to-be-tested closed SF6 air chamber because the switch arranged in the to-be-tested closed SF6 air chamber in a disconnected state is similar to a flat capacitor;

τ is the time constant;

r is a resistance value of a loop resistor of the time constant measurement circuit, which is measured before the circuit is connected, for example, the resistance value of the loop resistor is directly measured by a multimeter;

ε₀absolute dielectric constant of vacuum, i.e. 8.85X 10^-12F/m；

Alpha is SF6 gas molecular radius, namely 2.385X 10^-10m。

In one embodiment, as shown in fig. 6, the first alarm module 15 includes:

a third obtaining module 151, configured to obtain the prompt level associated with the prompt time point and a prompt manner of the prompt level.

And a prompt module 152, configured to generate an alarm intervention prompt according to the prompt mode at the prompt time point.

For specific limitations of the pressure measurement device for the arc extinguish chamber of the switching device in the nuclear power plant, reference may be made to the above limitations of the pressure measurement method for the arc extinguish chamber of the switching device in the nuclear power plant, and details are not described here. All or part of each module in the pressure measuring device for the arc extinguish chamber of the nuclear power plant switching equipment can be realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.

In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as shown in fig. 7. The computer device includes a processor, a memory, a network interface, a display screen, and an input device connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The network interface of the computer device is used for communicating with an external server through a network connection. The computer program is executed by a processor to realize a method for measuring the pressure of the arc extinguish chamber of the switching equipment of the nuclear power station.

In one embodiment, a computer device is provided, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the following steps when executing the computer program:

receiving a measurement instruction of a closed SF6 air chamber to be measured at a time point to be measured, and acquiring a time constant, which is measured by a time constant measuring circuit, of a switch arranged in the closed SF6 air chamber to be measured and corresponds to the time point to be measured;

acquiring the temperature of the closed SF6 air chamber to be measured at the time point to be measured through a temperature measuring circuit;

inputting the temperature and the time constant of the closed SF6 gas chamber to be detected into a preset SF6 gas pressure measurement function to obtain a gas pressure value of the closed SF6 gas chamber to be detected, and associating the gas pressure value with the time point to be detected;

generating a prediction model at a model generation time point according to each time point to be measured before the model generation time point and the gas pressure value associated with the time point;

and determining a low-pressure alarm time point corresponding to a preset low-pressure alarm threshold value through the prediction model, and generating an alarm intervention prompt at a prompt time point, wherein the prompt time point is determined according to the low-pressure alarm time point and a preset prompt rule.

In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:

receiving a measurement instruction of a closed SF6 air chamber to be measured at a time point to be measured, and acquiring a time constant, which is measured by a time constant measuring circuit, of a switch arranged in the closed SF6 air chamber to be measured and corresponds to the time point to be measured;

acquiring the temperature of the closed SF6 air chamber to be measured at the time point to be measured through a temperature measuring circuit;

inputting the temperature and the time constant of the closed SF6 gas chamber to be detected into a preset SF6 gas pressure measurement function to obtain a gas pressure value of the closed SF6 gas chamber to be detected, and associating the gas pressure value with the time point to be detected;

generating a prediction model at a model generation time point according to each time point to be measured before the model generation time point and the gas pressure value associated with the time point;

and determining a low-pressure alarm time point corresponding to a preset low-pressure alarm threshold value through the prediction model, and generating an alarm intervention prompt at a prompt time point, wherein the prompt time point is determined according to the low-pressure alarm time point and a preset prompt rule.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.