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Online discrimination method and system for wrong wiring of three-phase three-wire metering device

A technology for metering devices and wrong wiring, applied to measuring devices, measuring electricity, measuring electrical variables, etc., can solve problems such as different inspection cycles, time-consuming and labor-intensive problems

Active Publication Date: 2019-01-04
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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  • Online discrimination method and system for wrong wiring of three-phase three-wire metering device
  • Online discrimination method and system for wrong wiring of three-phase three-wire metering device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] Embodiment 1: as figure 1 Shown; A kind of three-phase three-wire metering device wrong wiring on-line screening method, it includes:

[0085] 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;

[0086] 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;

[0087] The first element and the second element are located in a metering device and are capable of measuring line voltage and phase current.

[0088...

Embodiment 2

[0150] Embodiment 2: as figure 1 Shown; A kind of three-phase three-wire metering device wrong wiring on-line screening method, it includes:

[0151] 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;

[0152] 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;

[0153] The first element and the second element are located in a metering device and are capable of measuring line voltage and phase current.

[0154...

Embodiment 3

[0183] Embodiment 3: as figure 1 Shown; A kind of three-phase three-wire metering device wrong wiring on-line screening method, it includes:

[0184] 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;

[0185] 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;

[0186] The first element and the second element are located in a metering device and are capable of measuring line voltage and phase current.

[0187...

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Abstract

The invention discloses an online discrimination method and system for the wrong wiring of a three-phase three-wire metering device, and the method comprises the steps: measuring line voltage effective values, line voltage phase sequences, phase current effective values, phase current phase sequences, reactive power and power factors of a first element and a second element in the three-phase three-wire metering device according to a power utilization collection system; judging the wiring of the metering device according to the line voltage effective values, line voltage phase sequences, phasecurrent effective values, phase current phase sequences, reactive power and power factors of the first element and the second element, and recognizing the wrong wiring in the metering device. The beneficial effects of the invention are that the method achieves the online discrimination of the wrong wiring of the three-phase three-wire metering device based on a conventional power utilization information collection system, so as to achieve the intelligent discrimination of the wrong wiring, and reduce the workload and safety risk of onsite 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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IPC IPC(8): G01R31/04
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