CN-122017310-A - Method for identifying abnormal superposition wiring faults of electric energy meter and related products

CN122017310ACN 122017310 ACN122017310 ACN 122017310ACN-122017310-A

Abstract

The application discloses a method for identifying an abnormal superposition wiring fault of an electric energy meter and a related product, and relates to the technical field of power systems. The method comprises the steps of obtaining an A-phase power factor and a C-phase power factor of the electric energy meter at each sampling time point in a preset time period, determining an abnormal time point in which the absolute value of the ratio of the A-phase power factor to the C-phase power factor is in a preset ratio range in the preset time period, and judging that abnormal superposition wiring faults exist in the electric energy meter according to the fact that the ratio of the number of the abnormal time points to the total number of the sampling time points in the preset time period is larger than a first preset ratio threshold value. According to the characteristic that the power factors of the A phase and the C phase of the high-voltage three-phase three-wire electric energy meter are equal under the condition that six abnormal superposition wires exist, the wiring faults of the high-voltage three-phase three-wire electric energy meter are identified.

Inventors

FU YONG
Jing Youding
DUAN CHAOYI
ZHENG XUJIE
CHEN XIAOYAN
GAN ZHIFANG
LIU YONGJUN

Assignees

北京合众伟奇科技股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260205

Claims (10)

1.A method for identifying an abnormal superimposed wiring fault of an electric energy meter, comprising: Acquiring an A-phase power factor and a C-phase power factor of the electric energy meter at each sampling time point in a preset time period; Determining an abnormal time point when the absolute value of the ratio of the A-phase power factor to the C-phase power factor is in a preset ratio range in the preset time period; and judging that the electric energy meter has abnormal superposition wiring faults according to the fact that the ratio of the number of the abnormal time points to the total number of the sampling time points in the preset time period is larger than a first preset ratio threshold value.
2. The method of claim 1, wherein the abnormal superimposed wiring fault comprises: A. The C phase current is misphase and the polarity of the A phase current is reversely connected; B. The C phase voltage is misphase and the polarity of the C phase current is reversely connected; A. The B phase voltage is misphase and the A phase current polarity is reversely connected; A. the phase C voltage is misphase and the polarity of the phase A current is reversely connected; B. the C phase voltage is misphase and the polarity of the C phase current is reversed, and A. the B phase voltage is misplaced and the A phase current polarity is reversed.
3. The method of claim 1, wherein the predetermined ratio range comprises [90%,110% ].
4. The method of claim 1, wherein the first predetermined ratio threshold comprises 90%, 92%, or 95%.
5. The method according to claim 1, wherein after judging that the electric energy meter has an abnormal superimposed wiring fault according to a ratio of the number of abnormal time points to the total number of sampling time points in the preset time period, comprising: acquiring total active power and apparent power of the electric energy meter at each sampling time point in the preset time period; and determining that the electric energy meter has abnormal superposition wiring faults in response to the fact that all sampling time points in the preset time period are met, wherein the total active power is larger than the apparent power.
6. The method according to claim 1, wherein after judging that the electric energy meter has an abnormal superimposed wiring fault according to a ratio of the number of abnormal time points to the total number of sampling time points in the preset time period, comprising: Acquiring total reactive power and apparent power of the electric energy meter at each sampling time point in the preset time period; and determining that the electric energy meter has abnormal superposition wiring faults in response to the fact that all sampling time points in the preset time period are met, wherein the total reactive power is larger than the apparent power.
7. The method according to claim 1, wherein after judging that the electric energy meter has an abnormal superimposed wiring fault according to a ratio of the number of abnormal time points to the total number of sampling time points in the preset time period, comprising: acquiring total active power and apparent power of the electric energy meter at each sampling time point in the preset time period; And determining that the electric energy meter has abnormal superposition wiring faults in response to the fact that the ratio of the total active power to the apparent power is smaller than a second preset ratio threshold value at all sampling time points in the preset time period.
8. The method of claim 7, wherein the second predetermined ratio threshold comprises 80%.
9. An electronic device, comprising: Processor, and A memory having stored thereon program code for identifying an electrical energy meter abnormal superimposed wiring fault, which when executed by the processor causes the electronic device to implement the method of any of claims 1-8.
10. A non-transitory machine readable storage medium having stored thereon program code for identifying an electrical energy meter abnormal superimposed wiring fault, which when executed by a processor, causes the method of any of claims 1-8 to be implemented.

Description

Method for identifying abnormal superposition wiring faults of electric energy meter and related products Technical Field The present application relates generally to the technical field of power systems. More particularly, the present application relates to a method and related products for identifying abnormal superimposed wiring faults of an electric energy meter. Background In modern power systems, heavy duty users of industrial enterprises, high voltage irrigation and drainage stations, large businesses, etc. are typically powered by high voltage power supply systems such as 10kV, 35kV, 110kV, etc. In a high-voltage power supply system, the high-voltage three-phase three-wire electric energy meter is used for accurately metering electric energy of a high-voltage user, has the accuracy of a wiring mode, the stability of operation and the accuracy of data, has important significance for economic dispatch, load management and energy efficiency analysis of a power grid, and can cause huge metering errors due to small errors on any wiring, so that serious economic loss or trade disputes are caused. There are 48 common wiring types for three-phase three-wire power meters. Among 48 common wiring modes, the abnormal wiring modes can be divided into a single abnormal wiring mode and an abnormal superposition wiring mode. Among the abnormal superimposed wiring schemes, there are 6 abnormal superimposed wiring schemes that are difficult to directly recognize through the electric energy meter data. Under the condition that various wiring anomalies are overlapped, the surface data such as voltage, current, power factor and the like of the 6 abnormal overlapped wiring modes seem to accord with the normal range, but the metering of the electric quantity is already wrong, and the long-term accumulation of metering errors can be evolved into huge electric quantity compensation disputes. In view of the above, the application provides a method for identifying abnormal superimposed wiring faults of an electric energy meter and related products, so as to accurately identify the above six abnormal superimposed wiring modes. Disclosure of Invention In order to solve at least one or more of the technical problems mentioned above, the present application proposes, in various aspects, a method for identifying an abnormal superimposed wiring fault of an electric energy meter and a solution of the related products. In a first aspect, the application provides a method for identifying an abnormal superposition wiring fault of an electric energy meter, which comprises the steps of obtaining an A-phase power factor and a C-phase power factor of the electric energy meter at each sampling time point in a preset time period, determining an abnormal time point in which the absolute value of the ratio of the A-phase power factor to the C-phase power factor is in a preset ratio range in the preset time period, and judging that the abnormal superposition wiring fault exists in the electric energy meter in response to the fact that the ratio of the number of the abnormal time points to the total number of the sampling time points in the preset time period is larger than a first preset ratio threshold. In a second aspect, the application provides an electronic device comprising a processor and a memory having stored thereon program code for identifying an abnormal superimposed wiring fault of a power meter, which when executed by the processor causes the electronic device to carry out the method according to the first aspect. In a third aspect, the present application provides a non-transitory machine-readable storage medium having stored thereon program code for identifying an abnormal superimposed wiring fault of a power meter, which when executed by a processor, causes the method according to the first aspect to be implemented. Through the method, the electronic equipment and the non-transitory machine-readable storage medium for identifying the abnormal superposition wiring faults of the electric energy meter, the wiring faults of the high-voltage three-phase three-wire electric energy meter are identified according to the characteristic that the power factors of the A phase and the C phase of the high-voltage three-phase three-wire electric energy meter are equal under the condition that six abnormal superposition wirings exist. In the prior art, the six types of abnormal superimposed wires are difficult to identify, and the scheme provided by the application can effectively and accurately identify the faults of the abnormal superimposed wires. Drawings The above, as well as additional purposes, features, and advantages of exemplary embodiments of the present application will become readily apparent from the following detailed description when read in conjunction with the accompanying drawings. In the drawings, embodiments of the application are illustrated by way of example and not by way of limitation, and like reference numerals refer