阅读说明：本技术 一种快速判断隔离开关三相位置的方法及装置 (Method and device for rapidly judging three-phase position of isolating switch ) 是由 王鑫明 赵春雷 孙广辉 刘英培 李世辉 曹欣 贾晓卜 张飞飞 刘宏亮 张学伟 姜 于 2020-12-30 设计创作，主要内容包括：本发明公开了一种快速判断隔离开关三相位置的方法及装置,涉及电力开关设备技术领域,具体是一种快速判断隔离开关三相位置的方法及装置,其包括：建立感应电压判据库步骤、获取感应电压量测值步骤、判断隔离开关位置步骤以及输出判定结果步骤,本发明方法,其有严谨的理论依据,在物理实现上需要增加的硬件少,硬件技术较为成熟简单,甚至对于目前大部分供电线路中现有硬件即可达到本方法的需求。仅需要从算法上、软件上着手,增加需要功能模块。该方法由仿真模型建立判据库,由实测数据进行验证,在验证通过后,即可大面积推广,非常适合对现有技术进行改造。(The invention discloses a method and a device for rapidly judging the three-phase position of an isolating switch, which relate to the technical field of power switch equipment, in particular to a method and a device for rapidly judging the three-phase position of the isolating switch, and comprise the following steps: the method has the advantages that the method has strict theoretical basis, the number of hardware required to be added in physical implementation is small, the hardware technology is mature and simple, and the requirements of the method can be met even for the existing hardware in most of the existing power supply lines. Only starting from algorithm and software, and adding required functional modules. The method establishes a criterion base by a simulation model, carries out verification by measured data, can be popularized in a large area after the verification is passed, and is very suitable for reforming the prior art.)

1. A method for rapidly judging three-phase position of an isolating switch is characterized by comprising the following steps:

s100: method for establishing induction voltage criterion U based on combination of big data statistical analysis and modeling simulation calculation_CriterionA criterion library;

s200: obtaining the measured value U of the induction voltage_Measuring；

S300: induced voltage measurement value U_MeasuringAnd the induction voltage criterion U in the induction voltage criterion library_CriterionComparing and judging the position of the isolating switch;

s400: and outputting the judgment result.

2. The method according to claim 1, wherein the step S200 is implemented to obtain a measurement U of the induced voltage_MeasuringThe method comprises the following steps:

s210, obtaining a hot standby induction voltage measurement valueAnd obtaining the measured value of the cold standby induction voltage

S220: calculating and obtaining the induction voltage measurement value U according to the following formula_Measuring：

3. The method of claim 2, wherein the hot standby induced voltage measurement is used to determine the three-phase position of the isolation switchAnd the cold standby induction voltage measurement valueAll obtained by a dispatching fault recording system, and the hot standby induction voltage measurement valueAnd the cold standby induction voltage measurement valueAre voltage values that include phase angle data.

4. The method as claimed in claim 1, wherein the induced voltage criterion is U_CriterionObtained according to the following formula:

5. the method as claimed in claim 4, wherein when the equipment to be powered is a main transformer, the hot standby induction voltage criterion is determined according to parameters of the main transformerCriterion and cold standby induction voltage criterionAnd (6) judging the criterion.

6. The method as claimed in claim 4, wherein when the device to be powered is a bus, the hot standby induction voltage criterion is determined according to the number of bus switches in a hot standby stateAnd (6) judging the criterion.

7. The method as claimed in claim 4, wherein when the power equipment to be powered is a line, the criterion for determining the hot standby induction voltage according to the operation condition of the peripheral line during the operation of the isolating switchCriterion and cold standby induction voltage criterionAnd (6) judging the criterion.

8. The method according to claim 1, wherein the step of judging the position of the isolation switch in S300 is to judge the position of the isolation switch according to the following manner:

the obtained induction voltage measured value U is obtained_MeasuringAnd induction voltage criterion U_CriterionComparing, and judging the switch position according to the following formula:

ln(U_measuringA/U_CriterionA)∈[-0.2,0.2]When the phase A of the isolating switch is in a closed position, the phase A is considered to be not well closed under other conditions, and the phase A is to be checked and verified;

ln(U_measuringB/U_CriterionB)∈[-0.2,0.2]When the phase B of the isolating switch is in a closed position, the phase B is considered to be not well closed under other conditions, and the phase B is to be checked and verified;

ln(U_measuringC/U_CriterionC)∈[-0.2,0.2]And in time, the C phase of the isolating switch is in a closed position, and the C phase is considered to be not well closed in other conditions to be checked and verified.

9. The method for rapidly judging the three-phase position of the disconnecting switch according to claim 1 or 8, wherein the step of S400 outputting the judgment result is output as follows:

and outputting the phase position judgment result of the isolating switch according to the result of judging the position of the switch.

10. An apparatus for rapidly determining the three-phase position of an isolator switch, characterized by a computer readable storage medium having a computer program stored thereon, the computer program being executed by a processor to perform the method steps of claim 9;

the computer program includes: the device comprises a data acquisition module, a sensing criterion voltage criterion library module, an isolating switch position judgment module and a conclusion output module;

the data acquisition module is used for acquiring the hot standby induction voltage measured value from the dispatching fault recording systemAnd the cold standby induced voltage measurement valueThe hot standby induced voltage measurementAnd the cold standby induced voltage measurement valueAre voltage values that include phase angle data;

the induction criterion voltage criterion library module comprises: the method comprises the following steps of (1) line induction voltage criterion, main transformer induction voltage criterion and bus induction voltage criterion;

the isolating switch position judging module is used for measuring the hot standby induction voltage from the data acquisition moduleAnd the cold standby induced voltage measurement valueIs converted into the measured value U of the induced voltage_Measuring；

The isolating switch position judging module is also used for measuring the induction voltage value U_MeasuringAnd the induction voltage criterion U from the induction criterion voltage criterion library module_CriterionComparing to judge the switch position;

the conclusion output module is used for converting the switch position information from the isolating switch position judgment module into isolating switch split-phase position information and outputting the information;

the data acquisition module and the induction criterion voltage criterion library module are respectively in signal connection with the isolating switch position judgment module, and the isolating switch position judgment module is in signal connection with the conclusion output module.

Technical Field

The invention relates to the technical field of power switch equipment, in particular to a method and a device for quickly judging three-phase positions of an isolating switch.

Background

The existing position judgment of the disconnecting switch is mainly based on two non-homology principles of electrical indication and mechanical indication to carry out double confirmation.

The electrical indication principle is that an auxiliary contact is installed in an isolating switch, the on-off in-place condition of the isolating switch is judged through the on-off of the contact, and the on-off in-place condition is transmitted to an isolating switch operation control cabinet, a monitoring machine and other equipment for operators to judge.

The mechanical indication principle is that the in-place condition of the disconnecting switch opening and closing is judged by observing marks such as a limiting bolt position and a mechanical position indicator of the disconnecting switch body.

The judgment results of the two principles form a 'double confirmation' criterion to ensure that the position of the isolating switch is judged without errors. In addition, the method for judging the position of the isolating switch comprises an image recognition method, an optical sensing method, a pressure sensing monitoring method, an attitude sensing monitoring method and the like.

The traditional isolating switch position double-confirmation method adopts two non-homology principles for judgment, has certain reliability, but needs operation and maintenance personnel to confirm on site when the mechanical indication position is judged, has certain potential safety hazard and reduces the operation efficiency, and the electrical indication possibly cannot accurately reflect the real action condition of the isolating switch due to abnormal transmission links.

Other judgment methods based on optical and mechanical sensors and image and gesture recognition algorithms have the problems of large influence by weather and electromagnetic environments, limited application range, high cost, unreliable operation and the like, and are difficult to popularize and apply.

When the isolating switch is operated remotely or checked abnormally, if the position of the isolating switch can be determined remotely, quickly and accurately, the operation efficiency and the abnormal fault handling speed can be greatly improved, the operation pressure of operation and maintenance personnel is reduced, and potential safety hazards caused by confirming the position on site are reduced.

In the prior art, both mechanical indication and electrical indication are indirect indications, and the problem that whether the isolating switch is in electrical contact or not cannot be reflected.

The invention content is as follows:

the invention provides a method and a device for rapidly judging the three-phase position of an isolating switch, which are used for solving the problem that whether the isolating switch is in electrical contact or not cannot be reflected in the prior art.

The invention adopts the following technical scheme:

a method for rapidly judging three-phase position of an isolating switch comprises the following steps:

s100: method for establishing induction voltage criterion U based on combination of big data statistical analysis and modeling simulation calculation_CriterionA criterion library;

s200: obtaining the measured value U of the induction voltage_Measuring；

S300: induced voltage measurement value U_MeasuringAnd the induction voltage criterion U in the induction voltage criterion library_CriterionComparing and judging the position of the isolating switch;

s400: and outputting the judgment result.

Further, the step S200 obtains an induced voltage measurement value U_MeasuringThe method comprises the following steps:

s210, obtaining a hot standby induction voltage measurement valueAnd obtaining the measured value of the cold standby induction voltage

S220: calculating and obtaining the induction voltage measurement value U according to the following formula_Measuring：

Further, the hot standby induction voltage measurement valueAnd the cold standby induction voltage measurement valueAll obtained by a dispatching fault recording system, and the hot standby induction voltage measurement valueAnd the cold standby induction voltage measurement valueAre voltage values that include phase angle data.

Further, the induction voltage criterion U_CriterionObtained according to the following formula:

further, when the equipment to be transmitted is a main transformer, hot standby induction voltage criterion is determined according to main transformer parametersCriterion and cold standby induction voltage criterionAnd (6) judging the criterion.

Further, when the equipment to be powered is a bus, hot standby induction voltage criterion is determined according to the number of bus switches in a hot standby stateAnd (6) judging the criterion.

Further, when the equipment to be powered is a circuit, a hot standby induction voltage criterion is determined according to the running condition of the peripheral circuit during the operation of the isolating switchCriterion and cold standby induction voltage criterionAnd (6) judging the criterion.

Further, the step of judging the position of the disconnecting switch in S300 judges the position of the switch in the following manner:

the obtained induction voltage measured value U is obtained_MeasuringAnd induction voltage criterion U_CriterionComparing the obtained data with each other,the switch position is judged according to the following formula:

ln(U_measuringA/U_CriterionA)∈[-0.2,0.2]When the phase A of the isolating switch is in a closed position, the phase A is considered to be not well closed under other conditions, and the phase A is to be checked and verified;

ln(U_measuringB/U_CriterionB)∈[-0.2,0.2]When the phase B of the isolating switch is in a closed position, the phase B is considered to be not well closed under other conditions, and the phase B is to be checked and verified;

ln(U_measuringC/U_CriterionC)∈[-0.2,0.2]And in time, the C phase of the isolating switch is in a closed position, and the C phase is considered to be not well closed in other conditions to be checked and verified.

Further, the step of S400 outputting the determination result is output as follows:

and outputting the phase position judgment result of the isolating switch according to the result of judging the position of the switch.

Further, an apparatus for quickly determining a three-phase position of an isolation switch is a computer-readable storage medium, where a computer program is stored, and the computer program includes: the method comprises the following steps: the device comprises a data acquisition module, a sensing criterion voltage criterion library module, an isolating switch position judgment module and a conclusion output module;

the data acquisition module is used for acquiring the hot standby induction voltage measured value from the dispatching fault recording systemAnd the cold standby induced voltage measurement valueThe hot standby induced voltage measurementAnd the cold standby induced voltage measurement valueAre voltage values that include phase angle data;

the induction criterion voltage criterion library module comprises: the method comprises the following steps of (1) line induction voltage criterion, main transformer induction voltage criterion and bus induction voltage criterion;

the isolating switch position judging module is used for measuring the hot standby induction voltage from the data acquisition moduleAnd the cold standby induced voltage measurement valueIs converted into the measured value U of the induced voltage_Measuring；

The isolating switch position judging module is also used for measuring the induction voltage value U_MeasuringAnd the induction voltage criterion U from the induction criterion voltage criterion library module_CriterionComparing to judge the switch position;

the conclusion output module is used for converting the switch position information from the isolating switch position judgment module into isolating switch split-phase position information and outputting the information;

the data acquisition module and the induction criterion voltage criterion library module are respectively in signal connection with the isolating switch position judgment module, and the isolating switch position judgment module is in signal connection with the conclusion output module.

The invention has the following positive effects:

a method for rapidly judging three-phase position of an isolating switch comprises the following steps: the method has the advantages that the method has strict theoretical basis, the number of hardware required to be added in physical implementation is small, the hardware technology is mature and simple, and the requirements of the method can be met even for the existing hardware in most of the existing power supply lines. Only starting from algorithm and software, and adding required functional modules.

The method establishes a data model by modeling according to the establishment of a criterion base, is verified by practice, can be popularized in a large area after passing theoretical verification, and is very suitable for modifying the prior art.

For a new product, part of hardware devices can be removed, for example, mechanical indicating devices or electrical indicating devices can be removed according to use scenes, so that the manufacturing cost is reduced, and the installation difficulty is reduced.

In use, for some power grid systems with higher automation levels, such as some disconnecting switches for realizing remote automatic closing operation, the three-phase position of the disconnecting switch can be remotely confirmed without manual confirmation through a mechanical indicating device or electrical indicating confirmation.

The confirmation method according to the method is a direct confirmation method of the switch contact, and the accuracy is more accurate than the electric indication confirmation and the mechanical indication confirmation.

According to the method, the induction voltage measurement value is obtained in an indirect mode, the induction voltage data are read once before and after the isolation switch is operated, a complex operation process is not required to be added, and the normal operation process is not influenced.

For a power supply line provided with a dispatching fault recording system, the method of the invention obtains the hot standby induction voltage measured value and the cold standby induction voltage measured value by the fault recording system, does not need extra hardware consumption, does not need to modify the existing line, has lower cost, and does not influence the stability and the safety of the existing line.

After a mathematical model is established and simulated, the method of the invention needs to obtain verification through big data statistical analysis, and under a common method, a hot standby induction voltage measured value and a cold standby induction voltage measured value are respectively obtained, so that the hot standby induction criterion voltage and the cold standby induction criterion voltage are established to facilitate verification in consideration of a verification mode.

The method of the invention realizes that the criterion base is established according to the existing physical conditions, the type of the equipment is mainly considered when the criterion base is established, and the equipment can be divided into three types of lines, buses and main transformers. The method is based on a method combining big data statistical analysis and modeling simulation calculation, and is used for collecting the induced voltage data of the equipment in cold and hot standby states in the historical power outage and transmission processes of the equipment, analyzing and checking the modeling simulation calculation result, and obtaining key influence factors of the induced voltages of different types of equipment and the induced voltage values of the equipment corresponding to different scenes.

The device of the invention provides the optimal implementation choice according to the method of the invention, and the structure is simple, and most power supply circuits do not need to increase the hardware cost, the cost is low and the cost is low.

The technology can judge the position of the isolating switch quickly and reliably by measuring the induced voltage of the equipment to which the isolating switch belongs after the isolating switch is operated or when the on-off position needs to be judged due to abnormal operation. On the basis of the existing electrical equipment, the remote judgment of the position of the isolating switch is realized by a reliable technical means, and an important technical support is provided for the remote operation of the isolating switch; meanwhile, when the isolating switch operates abnormally, the personal safety hidden danger generated by confirming the position of the isolating switch on site is avoided. The operation efficiency of operating personnel is comprehensively improved, and the safe and stable operation of the power grid and the reliable supply of electric power are effectively guaranteed.

Drawings

FIG. 1 is a schematic diagram of a power supply line according to an embodiment of the present invention;

fig. 2 is a functional block diagram of an apparatus for rapidly determining the position of an isolator according to an embodiment of the present invention.

In the figure:

a supply voltage U1;

a first isolation switch a phase K1A;

a first isolation switch B phase K1B;

a first isolation switch C-phase K1C;

a breaker switch A phase break capacitor C3A;

breaker switch a phase K3A;

a breaker switch B-phase break capacitor C3B;

breaker switch phase B K3B;

a breaker switch C-phase break capacitor C3C;

breaker switch C-phase K3C;

a second isolator switch a phase K2A;

a second isolator switch B phase K2B;

a second isolator switch, phase C, K2C;

peripheral charging device voltage U2;

a coupling capacitor C1;

capacitance to ground C2;

ground GND;

voltage measurement point P1;

the power-waiting apparatus D1.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

As shown in fig. 1-2, a method for quickly determining three-phase positions of an isolation switch includes:

s100: method for establishing induction voltage criterion U based on combination of big data statistical analysis and modeling simulation calculation_CriterionA criterion library;

s200: obtaining the measured value U of the induction voltage_Measuring；

S300: induced voltage measurement value U_MeasuringAnd the induction voltage criterion U in the induction voltage criterion library_CriterionComparing and judging the position of the isolating switch;

s400: and outputting the judgment result.

More specifically, in the power transmission operation process of the equipment, after the disconnecting switch is closed, before the circuit breaker is closed, a parallel capacitor exists in a fracture of the circuit breaker, a coupling capacitor C1 exists in the peripheral electrified equipment to a voltage measurement point P1, a ground capacitor C2 exists in the voltage measurement point P1 to the ground GND, a peripheral electrified equipment voltage U2 exists in the peripheral electrified equipment, and the power supply voltage U1 and the peripheral electrified equipment voltage U2 are overlapped, so that an obvious induced voltage is generated at the voltage measurement point P1, that is, an obvious induced voltage is generated on the equipment D1 to be transmitted, that is, a voltage measurement point P1 voltage U is composed of two parts: firstly, the power voltage U1 is divided into a voltage value U by a break capacitor of a breaker switch and a ground capacitor C2_{Fracture opening}(ii) a Secondly, the voltage U2 of the peripheral live equipment is divided into a voltage value U by a coupling capacitor C1 and a ground capacitor C2_{Coupling of}And (4) forming.

In this embodiment, including first isolator, second isolator and circuit breaker, first isolator includes: first isolator A looks K1A, first isolator B looks K1B and first isolator C looks K1C, and the second isolator includes: second isolator A looks K2A, second isolator B looks K2B and second isolator C looks K2C, the circuit breaker includes: breaker switch A phase K3A, breaker switch A phase break capacitor C3A, breaker switch B phase K3B, breaker switch B phase break capacitor C3B, breaker switch C phase K3C and breaker switch C phase break capacitor C3C.

When the first disconnector and the second disconnector are both in the closed state and the circuit breaker is in the open state, the voltage value at the voltage measurement point P1 is expressed by the following formula (phasor sum):

the first disconnector and the second disconnector are both in a closed state and the circuit breaker is in an open state, which is referred to as a hot standby state of the device.

When the first disconnecting switch, the second disconnecting switch and the circuit breaker are all in an open state, the power supply voltage U1 cannot generate a voltage division effect at a voltage measuring point P1, and a voltage value at the voltage measuring point P1 is expressed by the following formula:

when the first disconnecting switch, the second disconnecting switch and the circuit breaker are all in the disconnection state, the state is called as an equipment cold standby state.

By subtracting formula (2) from formula (1), it can be seen that:

the mathematical meaning of formula (3) is: the difference between the hot standby state induced voltage value and the cold standby state induced voltage value of the equipment. The physical meaning is: the power supply voltage U1 is an induced voltage value generated at a voltage measuring point P1 through a breaker switch break capacitor.

Therefore, when the three-phase inconsistency of a certain phase isolating switch occurs,the value will change.

Based on the principle, during the power transmission process of the equipment, the judgment is carried outThe numerical values are used to determine the three-phase position of the knife switch.

In practical implementation, the following steps should be followed:

firstly, a criterion base, namely a database for judging whether a certain isolating switch is closed or not, is established, and an induction voltage criterion U is established by a method of combining big data statistical analysis and modeling simulation calculation_CriterionThe criterion library is characterized in that data are calculated through modeling simulation, then the correctness of the theory of modeling simulation is verified through actually measured data, and the accurate and effective criterion library can be established only through combination of the data and the actually measured data.

On the physical connection, a sampling point should be established at the illustrated voltage measuring point P1, the position of the sampling point is located at the front end of the to-be-transmitted power device D1, and the collecting point collects voltage data of the position of the collecting point, and it is noted that the voltage data is voltage data including a voltage amplitude and a phase angle.

And then, after the voltage data of the sampling point is obtained, comparing the voltage data of the sampling point with corresponding criteria in a criterion base to see whether the voltage data of the sampling point meets the preset conditions of the criterion base. Specifically, the induced voltage measurement value U_MeasuringAnd the induction voltage criterion U in the criterion library_CriterionAnd comparing and judging the position of the isolating switch.

And finally, outputting a judgment result according to the comparison result, and displaying the state of the three-phase switch points of the isolating switch.

The method has strict theoretical basis, needs less hardware to be added in physical realization, has mature and simple hardware technology, and can meet the requirements of the method even for the existing hardware in most of the existing power supply circuits. Only starting from algorithm and software, and adding required functional modules.

The method establishes a data model by modeling according to the establishment of a criterion base, is verified by practice, can be popularized in a large area after passing theoretical verification, and is very suitable for modifying the prior art.

For a new product, part of hardware devices can be removed, for example, mechanical indicating devices or electrical indicating devices can be removed according to use scenes, so that the manufacturing cost is reduced, and the installation difficulty is reduced.

In use, for some power grid systems with higher automation levels, such as some disconnecting switches for realizing remote automatic closing operation, the three-phase position of the disconnecting switch can be remotely confirmed without manual confirmation through a mechanical indicating device or electrical indicating confirmation.

The confirmation method according to the method is a direct confirmation method of the switch contact, and the accuracy is more accurate than the electric indication confirmation and the mechanical indication confirmation.

Further, the step S200 obtains an induced voltage measurement value U_MeasuringThe method comprises the following steps:

s210, obtaining a hot standby induction voltage measurement valueAnd obtaining the measured value of the cold standby induction voltage

S220: calculating and obtaining the induction voltage measurement value U according to the following formula_Measuring：

More specifically, U is measured as an induced voltage measurement, in the sense of the magnitude of the voltage at the voltage measurement point P1, which depends on the magnitudeAndboth are obtained indirectly. The obtaining mode is obtained from the sampling point according to the states of the first disconnecting switch, the second disconnecting switch and the circuit breaker, namely, when the states of the first disconnecting switch and the second disconnecting switch are both closed states, the circuit breaker is in an open state, and the voltage amplitude and the phase angle collected by the sampling point at the moment are in an open stateWhen the first isolating switch, the second isolating switch and the breaker are in the off state, the voltage amplitude and the phase angle collected by the sampling point at the moment are

Obtaining the induced voltage measurement value U according to the formula (3)_Measuring。

The method obtains the induction voltage measurement value U in an indirect mode_MeasuringThe hardware for physical realization is less, the states of the first isolating switch, the second isolating switch and the breaker only need to be judged, the normal switching-on or switching-off operation process is met, the switching-off or switching-on process operation is not influenced, and unnecessary processes are not required to be added.

Further, the hot standby induction voltage measurement valueAnd the cold standby induction voltage measurement valueAll obtained by a dispatching fault recording system, and the hot standby induction voltage measurement valueAnd the cold standby induction voltage measurement valueAre voltage values that include phase angle data.

More specifically, for a power supply line provided with a dispatching fault recording system, the dispatching fault recording system acquires a hot standby induction voltage measurement value by virtue of the fault recording systemAnd cold standby induced voltage measurementThe circuit has the advantages of no need of extra hardware consumption, no need of transformation of the existing circuit, lower cost and no influence on the stability and safety of the existing circuit.

Further, the induction voltage criterion U_CriterionObtained according to the following formula:

more specifically, in accordance with the foregoing equation (3), at the induced voltage criterion U_CriterionIt is common practice to obtain the hot standby induction voltage criterion separatelyCriterion and cold standby induction voltage criterionThe criteria, after mathematical modeling and simulation are established as previously described, should be verified by big data statistical analysis, whereas under normal practices,andrespectively obtained, so that from the verification mode, a hot standby induction voltage criterion should be establishedCriterion and cold standby induction voltage criterionCriterion, indirectly obtaining U_CriterionTo facilitate verification.

Further, when the equipment to be transmitted is a main transformer, determining hot standby induction voltage criterion according to main transformer parametersCriterion and cold standby induction voltage criterionAnd (6) judging the criterion.

Further, when the equipment to be powered is a bus, hot standby induction voltage criterion is determined according to the number of bus switches in a hot standby stateAnd (6) judging the criterion.

Further, when the equipment to be powered is a circuit, a hot standby induction voltage criterion is determined according to the running condition of the peripheral circuit during the operation of the isolating switchCriterion and cold standby induction voltage criterionAnd (6) judging the criterion.

More specifically, the equipment can be classified into three types, i.e., a line, a bus and a main transformer. The method is based on a method combining big data statistical analysis and modeling simulation calculation, and is used for collecting the induced voltage data of the equipment in cold and hot standby states in the historical power outage and transmission processes of the equipment, analyzing and checking the modeling simulation calculation result, and obtaining key influence factors of the induced voltages of different types of equipment and the induced voltage values of the equipment corresponding to different scenes.

Besides being related to the switch fracture capacitance, the induced voltage of the equipment has different forming characteristics of the induced voltage of different types of equipment, so that the induced voltage application criterion for various types and scenes can be obtained. The line induction voltage is influenced by the running condition of the peripheral line, and corresponding criterion is determined according to the running condition of the peripheral line when the isolating switch is operated; the bus induction voltage is determined by the number of bus switches in a hot standby state, and corresponding criteria are determined according to the number of the bus switches in the hot standby state; the main transformer induction voltage is influenced by the parameters of the main transformer, and corresponding criteria are determined according to different main transformer parameters.

Further, the step of judging the position of the disconnecting switch in S300 judges the position of the switch in the following manner:

the obtained induction voltage measured value U is obtained_MeasuringAnd induction voltage criterion U_CriterionComparing, and judging the switch position according to the following formula:

ln(U_measuringA/U_CriterionA)∈[-0.2,0.2]When the phase A of the isolating switch is in a closed position, the phase A is considered to be not well closed under other conditions, and the phase A is to be checked and verified;

ln(U_measuringB/U_CriterionB)∈[-0.2,0.2]When the phase B of the isolating switch is in a closed position, the phase B is considered to be not well closed under other conditions, and the phase B is to be checked and verified;

ln(U_measuringC/U_CriterionC)∈[-0.2,0.2]And in time, the C phase of the isolating switch is in a closed position, and the C phase is considered to be not well closed in other conditions to be checked and verified.

More specifically, because the difference between the induced voltage values of different types of devices is large, if only the difference between the induced voltage values is set as the criterion, the device has no versatility. The deviation degree of the actual voltage measurement value and the induction voltage criterion value can be accurately reflected by adopting a logarithmic mode, and the position judgment accuracy of the isolating switch is improved.

Further, the step of S400 outputting the determination result is output as follows:

and outputting the phase position judgment result of the isolating switch according to the result of judging the position of the switch.

More specifically, the method outputs the phase position judgment result of the isolating switch according to the result of judging the position of the switch, so that a worker can remotely observe the three-phase position of the isolating switch, the local judgment link is reduced, and the possibility that certain safety risk exists in manual judgment is reduced.

Further, an apparatus for quickly determining a three-phase position of an isolation switch is a computer-readable storage medium, where a computer program is stored, and the computer program includes: the method comprises the following steps: the device comprises a data acquisition module, a sensing criterion voltage criterion library module, an isolating switch position judgment module and a conclusion output module;

the data acquisition module is used for acquiring the hot standby induction voltage measured value from the dispatching fault recording systemAnd the cold standby induced voltage measurement valueThe hot standby induced voltage measurementAnd the cold standby induced voltage measurement valueAre voltage values that include phase angle data;

the induction criterion voltage criterion library module comprises: the method comprises the following steps of (1) line induction voltage criterion, main transformer induction voltage criterion and bus induction voltage criterion;

the isolating switch position judging module is used for measuring the hot standby induction voltage from the data acquisition moduleAnd the cold standby induced voltage measurement valueIs converted into the measured value U of the induced voltage_Measuring；

The isolating switch position judging module is also used for measuring the induction voltage value U_MeasuringAnd the induction voltage criterion U from the induction criterion voltage criterion library module_CriterionComparing to judge the switch position;

the conclusion output module is used for converting the switch position information from the isolating switch position judgment module into isolating switch split-phase position information and outputting the information;

the data acquisition module and the induction criterion voltage criterion library module are respectively in signal connection with the isolating switch position judgment module, and the isolating switch position judgment module is in signal connection with the conclusion output module.

The device of the invention provides the optimal implementation choice according to the method of the invention, and the structure is simple, and the part of conditional power supply circuits do not need to increase the hardware cost, the cost is low and the cost is low.

The embodiments described above are only preferred embodiments of the invention and are not exhaustive of the possible implementations of the invention. Any obvious modifications to the above would be obvious to those of ordinary skill in the art, but would not bring the invention so modified beyond the spirit and scope of the present invention.