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Three-phase standard ground electric signal generating method and device and primary and secondary fusion switch ground fault detecting function testing method and system

A ground fault generation device technology, applied in the field of distribution network, can solve problems such as no detection system, achieve the effect of improving reliability, ensuring high precision and high stability

Inactive Publication Date: 2019-03-22
STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST +3
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Problems solved by technology

[0004] For the above-mentioned testing items, there is currently no testing system that meets the requirements

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  • Three-phase standard ground electric signal generating method and device and primary and secondary fusion switch ground fault detecting function testing method and system
  • Three-phase standard ground electric signal generating method and device and primary and secondary fusion switch ground fault detecting function testing method and system
  • Three-phase standard ground electric signal generating method and device and primary and secondary fusion switch ground fault detecting function testing method and system

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0032] It should be understood that the electrical signals described in the embodiments of the present invention include voltage signals and current signals, and the three-phase standard grounding electrical signals refer to the corresponding three-phase voltage and current signals when a ground fault occurs in the distribution network (usually single-phase) . The tested primary and secondary fusion switchgear should include: switch body 1, voltage transformer 2, 3, intelligent terminal 4, primary connection cable 5 and secondary connection cable 6, switch body 1 has a built-in current transformer, specifically as figure 1 shown. Among them, the switch body 1 has the function of closing and br...

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Abstract

The invention discloses a three-phase standard ground electric signal generating method and device and a primary and secondary fusion switch ground fault detecting function testing method and system.The three-phase standard ground electric signal generating method comprises performing modulation and error compensation on ground fault typical electric signals to obtain a corresponding three-phasewaveform sequence; performing digital-to-analogue conversion, amplification and PI (proportional-integral) correction on the three-sequence waveform sequence to obtain three-phase standard ground electric signals. The primary and secondary fusion switch ground fault detecting function testing method comprises loading the three-phase standard ground electric signals onto the primary side of the mutual inductor of a primary and secondary fusion switch to be tested; transmitting electric signals output from the secondary side of the mutual inductor to a supported intelligent terminal; according to SOE (state of energy) data uploaded by the intelligent terminal, determining accuracy of a ground fault detecting function. The three-phase standard ground electric signal generating method and device and a primary and secondary fusion switch ground fault detecting function testing method and system can help generate high-precision, high-stability and high-temporal-consistency three-phase standard ground electric signals and improve detecting accuracy of primary and secondary fusion switch ground fault detecting functions.

Description

technical field [0001] The invention belongs to the technical field of distribution network, and in particular relates to a method and device for generating a three-phase standard grounding electrical signal, and a testing method and system for the grounding fault detection function of a primary-secondary fusion switch. Background technique [0002] The primary and secondary fusion switchgear is a new type of intelligent equipment formed by the unified design and mutual integration of primary switching equipment and secondary voltage and current transformers, state sensors and intelligent terminals. It has measurement and transmission functions, fault detection and Processing function, anti-shake function, feeder automation function, etc. [0003] In order to ensure the reliability of primary and secondary fusion switchgear, primary accuracy inspection (transformer accuracy inspection), complete set of accuracy inspection (integrated accuracy inspection of switchgear body an...

Claims

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Application Information

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IPC IPC(8): G01R1/28G01R31/02G01R31/327G01R35/02
CPCG01R1/28G01R31/327G01R31/50G01R35/02
Inventor 刘瑞煌朱孟周杨景刚贾勇勇高昇宇陈杰王加友肖小龙陈光戴建卓
Owner STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST
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