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A method and system for online screening of incorrect wiring of a three-phase three-wire metering device

A metering device and three-phase three-wire technology, which is applied in the field of online screening of wrong wiring of three-phase three-wire metering devices, can solve the problems of time-consuming and laborious, different inspection cycles, etc.

Active Publication Date: 2021-05-07
STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the judgment of wrong wiring is usually carried out manually on site through on-site calibrator. For different types of loads, the inspection cycle is different, and on-site inspection is time-consuming and laborious, and there is a safety risk in on-site wiring.

Method used

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  • A method and system for online screening of incorrect wiring of a three-phase three-wire metering device
  • A method and system for online screening of incorrect wiring of a three-phase three-wire metering device

Examples

Experimental program
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Effect test

Embodiment 1

[0083] Embodiment 1: as figure 1 Shown; A kind of three-phase three-wire metering device wrong wiring on-line screening method, it includes:

[0084] S1: Measure the effective value of line voltage, phase sequence of line voltage, effective value of phase current, phase sequence of phase current, reactive power and power factor of the first element and the second element of the three-phase three-wire metering device according to the electricity collection system;

[0085] S2: Judging the wiring of the metering device according to the effective value of the line voltage, the phase sequence of the line voltage, the effective value of the phase current, the phase sequence of the phase current, reactive power and power factor of the first element and the second element, and identify the faults in the metering device wrong wiring;

[0086] The first element and the second element are located in a metering device and are capable of measuring line voltage and phase current.

[0087...

Embodiment 2

[0149] Embodiment 2: as figure 1 Shown; A kind of three-phase three-wire metering device wrong wiring on-line screening method, it includes:

[0150] S1: Measure the effective value of line voltage, phase sequence of line voltage, effective value of phase current, phase sequence of phase current, reactive power and power factor of the first element and the second element of the three-phase three-wire metering device according to the electricity collection system;

[0151] S2: Judging the wiring of the metering device according to the effective value of the line voltage, the phase sequence of the line voltage, the effective value of the phase current, the phase sequence of the phase current, reactive power and power factor of the first element and the second element, and identify the faults in the metering device wrong wiring;

[0152] The first element and the second element are located in a metering device and are capable of measuring line voltage and phase current.

[0153...

Embodiment 3

[0182] Embodiment 3: as figure 1 Shown; A kind of three-phase three-wire metering device wrong wiring on-line screening method, it includes:

[0183] S1: Measure the effective value of line voltage, phase sequence of line voltage, effective value of phase current, phase sequence of phase current, reactive power and power factor of the first element and the second element of the three-phase three-wire metering device according to the electricity collection system;

[0184] S2: Judging the wiring of the metering device according to the effective value of the line voltage, the phase sequence of the line voltage, the effective value of the phase current, the phase sequence of the phase current, reactive power and power factor of the first element and the second element, and identify the faults in the metering device wrong wiring;

[0185] The first element and the second element are located in a metering device and are capable of measuring line voltage and phase current.

[0186...

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Abstract

The invention discloses an online screening method and system for incorrect wiring of a three-phase three-wire metering device. Phase sequence, phase current rms value, phase current phase sequence, reactive power and power factor; line voltage rms value, line voltage phase sequence, phase current rms value, phase current phase sequence, no The wiring of the metering device is judged based on the power and power factor, and the wrong wiring in the metering device is identified. The beneficial effects obtained by the present invention are: based on the existing power consumption information collection system, the online screening of the wrong wiring of the three-phase three-wire metering device is realized, so as to realize the intelligent screening of the wrong wiring, and reduce the workload and safety risks of on-site verification.

Description

technical field [0001] The invention relates to the technical field of electric energy metering, in particular to an online screening method and system for incorrect wiring of a three-phase three-wire metering device. Background technique [0002] At present, the three-phase three-wire metering wiring method is mostly used in neutral point ungrounded systems (including 10kV, 35kV and other voltage levels), mainly involving distribution networks, and delivering electric energy to power users, and the energy flow is unidirectional. The three-phase three-wire metering device includes a three-phase three-wire electric energy meter, a voltage transformer, a current transformer, and a secondary circuit, and any wiring error in any link will lead to the accuracy of electric energy measurement. In the three-phase three-wire metering device, the voltage transformer mostly adopts the V-V connection mode, and the primary side and the secondary side of the voltage transformer are line v...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/67
CPCG01R31/67
Inventor 陈文礼杨芾藜常仕亮周全何珉邹波何蓓吴彬侯兴哲郑可籍勇亮叶君刘型志王蕊
Owner STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST