Intelligent isolation switch equipment and control method thereof
阅读说明：本技术 一种智能隔离开关设备及其控制方法 (Intelligent isolation switch equipment and control method thereof ) 是由 谷战垒 王军 谭赣江 都正周 刘利兵 刘志宏 钱波 黄亚娟 郭权 于 2020-07-17 设计创作，主要内容包括：本发明公开了一种智能隔离开关设备,包括：隔离开关本体、SOC控制芯片、计量采样电路、电源模块及指示和按键控制电路；隔离开关本体、电源模块和SOC控制芯片依次连接；指示和按键控制电路与SOC控制芯片连接,获取并显示SOC控制芯片的运行状态信息；计量采样电路的输入端与若干个电能表连接,获取若干个电能表的电能表实时数据信息,并将实时数据信息传输至SOC控制芯片；SOC控制芯片接收实时数据信息,并依据实时数据信息判断电能表的计量精度。还保护了一种智能隔离开关设备控制方法。通过计量采样电路精准获取与智能隔离开关设备相连的若干个电能表的数据信息,并对数据信息进行计量和校准,实现对电能表的精准计量,为电能失准分析提供数据支撑。(The invention discloses an intelligent isolation switch device, which comprises: the system comprises an isolating switch body, an SOC control chip, a metering sampling circuit, a power supply module and an indicating and key control circuit; the isolating switch body, the power supply module and the SOC control chip are sequentially connected; the indication and key control circuit is connected with the SOC control chip and used for acquiring and displaying the running state information of the SOC control chip; the input end of the metering sampling circuit is connected with the electric energy meters to obtain the real-time data information of the electric energy meters and transmit the real-time data information to the SOC control chip; the SOC control chip receives the real-time data information and judges the metering precision of the electric energy meter according to the real-time data information. A control method of the intelligent isolation switch device is also protected. The data information of a plurality of electric energy meters connected with the intelligent disconnecting switch device is accurately acquired through the metering sampling circuit, and the data information is metered and calibrated, so that the accurate metering of the electric energy meters is realized, and data support is provided for electric energy misalignment analysis.)
1. An intelligent isolation switch device, comprising: the system comprises an isolating switch body, an SOC control chip, a metering sampling circuit, a power supply module and an indicating and key control circuit;
the isolating switch body, the power supply module and the SOC control chip are sequentially connected;
the indicating and key control circuit is connected with the SOC control chip and used for acquiring and displaying the running state information of the SOC control chip;
the input end of the metering sampling circuit is connected with a plurality of electric energy meters, the real-time data information of the electric energy meters of the plurality of electric energy meters is obtained, and the real-time data information is transmitted to the SOC control chip;
and the SOC control chip receives the real-time data information and judges the metering precision of the electric energy meter according to the real-time data information.
2. The intelligent isolation switch apparatus of claim 1, further comprising: a data encryption and decryption module;
the data encryption and decryption module is connected with the SOC control chip, receives the real-time data information of the SOC control chip, encrypts and/or decrypts the electric energy meter data, and transmits the encrypted and/or decrypted real-time data information to the SOC control chip.
3. The intelligent isolation switch apparatus of claim 1, further comprising: a data storage module;
the storage module is connected with the SOC control chip and used for acquiring and storing the real-time data information in the SOC control chip.
4. The intelligent isolation switch apparatus of claim 1, further comprising: a wireless communication module;
the wireless communication module is connected with the SOC control chip;
and the SOC control chip receives and transmits the real-time data information of the electric energy meter through the wireless communication module.
5. The intelligent isolation switch apparatus of claim 4,
and the wireless communication module exchanges data with the electric energy meter through Bluetooth.
6. The intelligent isolation switch apparatus of claim 1, further comprising: a power line carrier communication module;
the power carrier communication module is connected with the SOC control chip;
and the SOC control chip exchanges data with the electric energy meter through the power carrier communication module.
7. The intelligent isolation switch apparatus of claim 1, further comprising: an RS485 communication module;
the RS485 communication module is connected with the SOC control chip;
and the SOC control chip exchanges data with the electric energy meters through the RS485 communication module.
8. Intelligent disconnector device according to any of claims 1 to 7,
the electric energy meter real-time data information comprises: frozen electric quantity data, alternating current sampling data, active power data, event record data and power factor data.
9. An intelligent isolation switch device control method, characterized in that the intelligent isolation switch device of any one of the control claims 1-8 comprises the following steps:
obtaining a plurality of active power values of any electric energy meter according to a first preset time interval and obtaining a first active power average value of the electric energy meter;
obtaining a plurality of active power values of the electric energy meter according to a second preset time interval and obtaining a second active power average value of the electric energy meter;
judging whether the difference value of the second active power average value and the first active power average value is larger than a preset proportional value of the first active power average value;
if the difference value of the second active power average value and the first active power average value is larger than the preset proportion value of the first active power average value, judging that the error of the electric energy meter exceeds the limit;
and if the difference value of the second active power average value and the first active power average value is smaller than or equal to a preset proportion value of the first active power average value, judging that the error of the electric energy meter meets the requirement.
10. The intelligent disconnector device control method of claim 9, wherein the preset proportional value is 2%.
Technical Field
The invention relates to the technical field of power equipment detection, in particular to intelligent isolating switch equipment and a control method thereof.
Background
With the construction of the intelligent power grid in China, each province and power company runs about 4.7 hundred million intelligent electric energy meters, and efficient electric energy metering is provided for thousands of households. However, the number of suppliers of intelligent electric energy meters is large, and the quality of the intelligent electric energy meters in operation is uneven at present, particularly, the electric energy meters with the protocol of the 09 edition have the situations of clock confusion and over-limit metering errors. According to the working deployment of the national power grid company, in recent years, the electric energy meter misalignment analysis model algorithm application is developed through the power utilization information acquisition system of each province company, and a certain effect is achieved. However, due to insufficient data support, the phenomenon of failure of data acquisition of the electric energy meter occurs, and a certain trouble is caused to the misalignment analysis.
Disclosure of Invention
The embodiment of the invention aims to provide intelligent isolating switch equipment and a control method thereof.
To solve the above technical problem, a first aspect of an embodiment of the present invention provides an intelligent disconnecting switch device, including: the method comprises the following steps: the system comprises an isolating switch body, an SOC control chip, a metering sampling circuit, a power supply module and an indicating and key control circuit;
the isolating switch body, the power supply module and the SOC control chip are sequentially connected;
the indicating and key control circuit is connected with the SOC control chip and used for acquiring and displaying the running state information of the SOC control chip;
the input end of the metering sampling circuit is connected with a plurality of electric energy meters, the real-time data information of the electric energy meters of the plurality of electric energy meters is obtained, and the real-time data information is transmitted to the SOC control chip;
and the SOC control chip receives the real-time data information and judges the metering precision of the electric energy meter according to the real-time data information.
Further, still include: a data encryption and decryption module;
the data encryption and decryption module is connected with the SOC control chip, receives the real-time data information of the SOC control chip, encrypts and/or decrypts the electric energy meter data, and transmits the encrypted and/or decrypted real-time data information to the SOC control chip.
Further, still include: a data storage module;
the storage module is connected with the SOC control chip and used for acquiring and storing the real-time data information in the SOC control chip.
Further, still include: a wireless communication module;
the wireless communication module is connected with the SOC control chip;
and the SOC control chip receives and transmits the real-time data information of the electric energy meter through the wireless communication module.
Further, the wireless communication module exchanges data with the electric energy meter through Bluetooth.
Further, still include: a power line carrier communication module;
the power carrier communication module is connected with the SOC control chip;
and the SOC control chip exchanges data with the electric energy meter through the power carrier communication module.
Further, still include: an RS485 communication module;
the RS485 communication module is connected with the SOC control chip;
and the SOC control chip exchanges data with the electric energy meters through the RS485 communication module.
Further, the electric energy meter real-time data information comprises: frozen power data, ac sampled data, active power data, event log data, and/or power factor data.
Accordingly, a second aspect of the embodiments of the present invention provides a method for controlling an intelligent disconnecting switch device, where an error of an electric energy meter connected to the intelligent disconnecting switch device is determined by any one of the intelligent disconnecting switch devices, including the following steps:
obtaining a plurality of active power values of any electric energy meter according to a first preset time interval and obtaining a first active power average value of the electric energy meter;
obtaining a plurality of active power values of the electric energy meter according to a second preset time interval and obtaining a second active power average value of the electric energy meter;
judging whether the difference value of the second active power average value and the first active power average value is larger than a preset proportional value of the first active power average value;
if the difference value of the second active power average value and the first active power average value is larger than the preset proportion value of the first active power average value, judging that the error of the electric energy meter exceeds the limit;
and if the difference value of the second active power average value and the first active power average value is smaller than or equal to a preset proportion value of the first active power average value, judging that the error of the electric energy meter meets the requirement.
Further, the preset proportion value is 2%.
The technical scheme of the embodiment of the invention has the following beneficial technical effects:
the data information of a plurality of electric energy meters connected with the intelligent disconnecting switch device is accurately acquired through the metering sampling circuit, and the data information of the electric energy meters is metered and calibrated, so that the accurate metering of the electric energy meters is realized, and data support is provided for electric energy misalignment analysis.
Drawings
Fig. 1 is a schematic diagram of an intelligent isolation switch device provided by an embodiment of the invention;
fig. 2 is a schematic circuit diagram of an intelligent isolation switch device provided by an embodiment of the invention;
fig. 3 is a schematic diagram of connection between an intelligent isolation switch device and an electric energy meter according to an embodiment of the present invention;
fig. 4 is a flowchart of a control method for an intelligent isolation switch device according to an embodiment of the present invention;
fig. 5 is a flowchart of the precision metering of the intelligent disconnecting switch device to the electric energy meter according to the embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
Fig. 1 is a schematic diagram of a principle of an intelligent isolation switch device according to an embodiment of the present invention.
Referring to fig. 1, a first aspect of an embodiment of the present invention provides an intelligent isolation switch device, including: the isolating switch comprises an isolating switch body, an SOC control chip, a metering sampling circuit, a power supply module and an indication and key control circuit. The isolating switch body, the power supply module and the SOC control chip are sequentially connected; the indication and key control circuit is connected with the SOC control chip and used for acquiring and displaying the running state information of the SOC control chip; the input end of the metering sampling circuit is connected with the electric energy meters to obtain the real-time data information of the electric energy meters and transmit the real-time data information to the SOC control chip; the SOC control chip receives real-time data information of the electric energy meter, processes the data, and judges the metering precision of the electric energy meter according to the real-time data information.
The metering sampling circuit has a high-precision metering function, the current sampling resistor and the voltage sampling resistor adopt precision resistors, and the resistance precision of the precision resistors is less than or equal to 0.01 percent. In addition, when the product is checked, the checking frequency is increased, and the metering error is checked every 1A current change, so that the high-precision metering function of the intelligent isolating switch equipment is ensured.
After the intelligent isolation switch equipment collects all active power data of the intelligent electric energy meter hung down, the collected active power data are judged, whether the collected active power data change or not is judged, if only one active power data change changes, the intelligent isolation switch equipment compares the active power data change quantity of the intelligent isolation switch equipment with the active power data change quantity of the intelligent electric energy meter hung down, and therefore whether the metering precision of the intelligent electric energy meter is out of tolerance or not is judged.
Optionally, the intelligent isolation switch device further comprises: and a data encryption and decryption module. The data encryption and decryption module is connected with the SOC control chip, receives real-time data information of the SOC control chip, encrypts and/or decrypts the electric energy meter data, and transmits the encrypted and/or decrypted real-time data information to the SOC control chip.
Optionally, the intelligent isolation switch device further comprises: and a data storage module. The storage module is connected with the SOC control chip and used for acquiring and storing real-time data information in the SOC control chip.
Optionally, the intelligent isolation switch device further comprises: and a wireless communication module. The wireless communication module is connected with the SOC control chip; the SOC control chip receives and transmits real-time data information of the electric energy meter through the wireless communication module.
Further, the wireless communication module exchanges data with the electric energy meter through Bluetooth.
Optionally, the intelligent isolation switch device further comprises: and a power carrier communication module. The power carrier communication module is connected with the SOC control chip; and the SOC control chip exchanges data with the electric energy meter through the power carrier communication module.
Optionally, the intelligent isolation switch device further comprises: and an RS485 communication module. The RS485 communication module is connected with the SOC control chip; and the SOC control chip exchanges data with the electric energy meters through the RS485 communication module.
In one implementation manner of the embodiment of the present invention, the real-time data information of the electric energy meter includes: frozen power data, ac sampled data, active power data, event log data, and/or power factor data.
Fig. 2 is a schematic circuit diagram of an intelligent isolation switch device according to an embodiment of the present invention.
Referring to fig. 2, specifically, the SOC control chip is a data acquisition and data processing unit of the intelligent isolation switch device, and integrates an ARM Cortex-M0 core, a 256KB FLASH, a 48KB SRAM, a 7-way sigma-delta ADC, a three-phase metering and fault detection module, a metering accuracy self-detection module, a 4-way multiplexed SAR ADC, an 8-way multiplexed GP-ADC, an independent power supply hardware temperature compensation RTC, and various peripherals.
The input end of the isolating switch body is a three-phase voltage signal which is A-I, B-I, C-I, GND-I respectively. The output end A-O, B-O, C-O, GND-O of the isolating switch is connected with A, B, C, GND of the power supply module, when the isolating switch body is switched on, the power supply module starts to work and outputs three paths of constant voltage signals of +12V, +3.3V, VDD (RS485) simultaneously, and the constant voltage signals respectively provide power supply signals for the power carrier communication module, the SOC control chip circuit and the RS485 communication circuit.
The metering and sampling circuit has a high-precision metering function, the input end of the metering and sampling circuit is a three-phase four-line voltage signal which is A, B, C, GND respectively, the output end of the metering and sampling circuit is an UAP (Universal asynchronous receiver) phase voltage sampling signal end, an UAN phase voltage sampling signal end, a UBP phase voltage sampling signal end, a UBN phase voltage sampling signal end, a C phase voltage sampling signal end, an IAP phase voltage sampling signal end, an IAN phase current sampling signal end, an IBP phase current sampling signal end, an IBN phase current sampling signal end, and an ICP phase current sampling signal end, an ICN phase current sampling signal end. The output end of the metering sampling circuit is UAP, UAN, UBP, UBN, UCP, UCN, IAP, IAN, IBP, IBN, ICP, ICN and UAP, UAN, UBP, UBN, UCP, UCN, IAP, IAN, IBP, IBN, ICP, ICN pin connection of SOC control chip circuit, the metering sampling circuit carries out current sampling and voltage sampling, through SOC control chip internal data processing, after the active power data of all the down-hanging intelligent electric energy meters are collected by the intelligent isolating switch, whether the collected active power data change or not is judged, if only one of the active power data change or not is changed, the intelligent isolating switch compares the active power data change of the intelligent isolating switch with the active power data change of the down-hanging household meters, and therefore whether the metering precision of the intelligent electric energy meter is over-poor or not is judged. The intelligent isolating switch realizes the electric energy metering of the three-phase four-wire load, and the metering precision is 0.5S level.
The data encryption and decryption module is an ESAM chip, and is connected with ESAM _ MOSI, ESAM _ MISO, ESAM _ CS and ESAM _ CLK pins of the SOC control chip B through ESAM _ MOSI, ESAM _ MISO, ESAM _ CS and ESAM _ CLK pins of the ESAM chip, so that encryption and decryption processing of data such as electric energy data, key parameters, clocks and the like is realized, and safe transmission of electric energy metering data is ensured.
The SDA and the SCL in the data storage module are respectively connected with the EE _ SDA and the EE _ SCL of the SOC control chip, so that the storage of frozen electric quantity data, alternating current sampling data, functional rate data, event recording data, power factor and other data of the under-hung user electric energy meter collected by the intelligent isolating switch equipment is realized.
In the wireless communication module (i.e. bluetooth module), RXD1_ B, TXD1_ B, RXD2_ B, TXD2_ B, MODE _ B, STA _ B, RST _ B is respectively connected with RXD1_ B, TXD1_ B, RXD2_ B, TXD2_ B, MODE _ B, STA _ B, RST _ B of the SOC control chip circuit B, and when the intelligent disconnecting switch device is provided with a bluetooth communication function, the intelligent disconnecting switch device can be paired with the user power meter which is hung down and perform bluetooth local communication.
And the power carrier communication module MCU _ ZB _ EVENOUT and the MCU _ ZB _ RESET are respectively connected with the MCU _ ZB _ EVENOUT and the MCU _ ZB _ RESET pins of the SOC control chip to realize the power broadband carrier communication function.
Fig. 3 is a schematic diagram of connection between an intelligent isolation switch device and an electric energy meter according to an embodiment of the present invention.
Referring to fig. 3, the intelligent isolation switch device and the down-hanging user electric energy meter are installed in a user electric energy meter box. The 485_ RXD1, 485_ TXD1, 485_ RXD2 and 485_ TXD2 interfaces of the RS485 communication module are respectively connected with the 485_ RXD1, 485_ TXD1, 485_ RXD2 and 485_ TXD2 pins of the SOC control chip, and the intelligent isolating switch device is connected with the lower hanging user electric energy meter through 485_ A1 and 485_ B1 of the RS485 communication module. The intelligent isolation switch equipment realizes the acquisition of frozen electric quantity data, alternating current sampling data, active function data, power factor and other data of the electric energy meter of the off-hook user. The 485_ A2 and 485_ B2 interfaces of the 485 communication module are
The indication and key control circuit has the functions of indicating the running state and inquiring the parameter key, and the MUC _ CF1, the MUC _ CF2_ DZ, the MCU _ ALARM _ GREEN and the MCU _ ALARM _ RED interfaces are respectively connected with the MUC _ CF1, the MUC _ CF2_ DZ, the MCU _ ALARM _ GREEN and the MCU _ ALARM _ RED pins of the SOC control chip, so that the functions of indicating the running state of the SOC and inquiring the parameter key are realized.
Fig. 4 is a flowchart of a control method for an intelligent isolation switch device according to an embodiment of the present invention.
Referring to fig. 4, a second aspect of the present invention provides a method for controlling an intelligent isolation switch device, which is used for controlling the intelligent isolation switch device in the first aspect of the present invention, where the intelligent isolation switch device is connected to a plurality of electric energy meters, and the method includes the following steps:
s100, obtaining a plurality of active power values of any electric energy meter according to a first preset time interval and obtaining a first active power average value of the electric energy meter.
S200, obtaining a plurality of active power values of the electric energy meter according to a second preset time interval and obtaining a second active power average value of the electric energy meter.
And S300, judging whether the difference value of the second active power average value and the first active power average value is larger than the preset proportional value of the first active power average value.
And S400, if the difference value of the second active power average value and the first active power average value is larger than the preset proportion value of the first active power average value, judging that the error of the electric energy meter exceeds the limit.
And S500, if the difference value of the second active power average value and the first active power average value is smaller than or equal to the preset proportion value of the first active power average value, judging that the error of the electric energy meter meets the requirement.
Optionally, the preset proportion value is 2%. When the electric energy meter is detected, when the difference value of the second active power average value and the first active power average value is more than 2% of the first active power average value, the error of the electric energy meter is judged to be out of limit; and when the difference value of the second active power average value and the first active power average value is less than or equal to 2% of the first active power average value, judging that the error of the electric energy meter meets the requirement of error performance of the electric energy meter.
Fig. 5 is a flowchart of the precision metering of the intelligent disconnecting switch device to the electric energy meter according to the embodiment of the invention.
Referring to fig. 5, firstly, the intelligent isolation switch device automatically searches the number N of the off-hook user electric energy meters 5 minutes in the morning, automatically stores the number of the off-hook user electric energy meters, simultaneously stores the file information of each user electric energy meter, automatically arranges the electric energy meters, collects the current functional power of the off-hook user electric energy meters once per second, and averages and stores the current functional power of the 15 user electric energy meters if the collected number reaches 15. And by analogy, all 15 active power values of all the user electric energy meters hung below the intelligent isolating switch are collected once, and are averaged and stored. After the first round of collection is finished, the current active power collection and averaging processing work of the second round of user electric energy meters is carried out according to the process, if the second round of collection is finished and averaging processing is carried out, the intelligent isolating switch carries out comparison analysis on the active power average value of each user electric energy meter twice in the front and back, if the power of only one user electric energy meter changes, misalignment analysis is started, and therefore whether the error of the user electric energy exceeds the limit is judged.
The intelligent isolation switch device collects active power of the user electric energy meter in real time and records the active power, collects an active power value every second, continuously collects 15 points, and periodically collects the active power value of each user electric energy meter. The intelligent isolating switch device averagely processes and stores the collected 15-point active power value of each user electric energy meter,
wherein, P11For collecting the sum of 15 active function rate values p of No. 1 user electric energy meter for the first timeiThe functional power value of the user electric energy meter is collected once per second.
Wherein the content of the first and second substances,the average value of 15 active functional powers of the No. 1 user electric energy meter is collected for the first time.
Wherein, P12For the second collection of the sum of the 15 active function rate values, p, of the No. 1 user electric energy meteriThe functional power value of the user electric energy meter is collected once per second.
Wherein the content of the first and second substances,and acquiring the average value of 15 active functional powers of the No. 1 user electric energy meter for the second time.
According to the rule, the average power of the first collection of the No. 2 user electric energy meter is obtained in sequenceAnd the second-time collection average power of the No. 2 user electric energy meter
After 15 points of active power of two rounds of user electric energy meters are acquired and averaged, the intelligent disconnecting switch equipment starts to compare active power values of each user electric energy meter twice and twice, when the active power value of the ith user electric energy meter changes, the intelligent disconnecting switch equipment starts to analyze the metering precision error of the user electric energy meter, and if the error of the active power of the user electric energy meter is more than 2%, the error of the user electric energy meter is over-limit; if the error of the active power of the user electric energy meter is less than or equal to 2%, the error of the user electric energy meter is normal,
wherein the content of the first and second substances,and acquiring the difference value of the average value of the active power for the first time and the average value of the active power for the second time for the intelligent disconnecting switch device.
Wherein the content of the first and second substances,
The difference value of the active power average values of the ith user electric energy meter twice and the difference value of the active power average values of the intelligent isolating switch device twice are the ratio, if the difference value is less than or equal to 2%, the error of the ith user electric energy meter is normal, if the difference value is more than 2%, the error of the ith user electric energy meter is out of tolerance, and the intelligent isolating switch device forms an event record and reports the event record to the master station.
An embodiment of the present invention is directed to protect an intelligent disconnecting switch device, including: the system comprises an isolating switch body, an SOC control chip, a metering sampling circuit, a power supply module and an indicating and key control circuit; the isolating switch body, the power supply module and the SOC control chip are sequentially connected; the indication and key control circuit is connected with the SOC control chip and used for acquiring and displaying the running state information of the SOC control chip; the input end of the metering sampling circuit is connected with the electric energy meters to obtain the real-time data information of the electric energy meters and transmit the real-time data information to the SOC control chip; the SOC control chip receives real-time data information of the electric energy meter, receives the real-time data information, and judges the metering precision of the electric energy meter according to the real-time data information. A control method of the intelligent isolation switch device is also protected. The technical scheme has the following effects:
a control method of the intelligent isolation switch device is also protected. The data information of a plurality of electric energy meters connected with the intelligent disconnecting switch device is accurately acquired through the metering sampling circuit, and the data information of the electric energy meters is metered and calibrated, so that the accurate metering of the electric energy meters is realized, and data support is provided for electric energy misalignment analysis.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.