Test system for actual line selection effect of fault line selection device for small current grounding system

A technology of small current grounding and line selection devices, which is applied in the direction of measuring devices, measuring electrical variables, instruments, etc., can solve the problems of low scalability, large amount of engineering, poor universality, etc., and achieve good scalability and low cost , the effect of simple operation

Inactive Publication Date: 2018-09-14
STATE GRID HUBEI ELECTRIC POWER CO XIAOGAN POWER SUPPLY CO
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of large engineering volume, high cost, poor universality and low scalability in the existing small current grounding system fault line selection device performance test scheme

Method used

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  • Test system for actual line selection effect of fault line selection device for small current grounding system

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Experimental program
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Effect test

Embodiment Construction

[0020] Such as figure 1 As shown, a test system for the actual line selection effect of a small current grounding system fault line selection device includes two parts: an upper computer 7 and a lower computer 8: the upper computer 7 includes a three-phase power supply 1, and a structure and parameter adjustable distribution network system 2, a grounding mode selection module 3, a fault simulation module 4 whose fault type, location, occurrence time, and duration can be set, a database 5, and at least one industrial computer communication interface 6; the lower computer 8 includes at least A line selection device to be tested is preset with a communication interface; the communication interface of the industrial computer communication interface 6 and the line selection device of the lower computer 8 are preset to establish a communication channel by setting the IPX / SPX or TCP / IP protocol.

[0021] The three-phase power supply 1 is realized by Matlab software in the prior art. ...

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Abstract

The invention relates to a test system for an actual line selection effect of a fault line selection device for a small current grounding system. The test system is composed of an upper computer and alower computer. The upper computer consists of a three-phase power source, a distribution network system, a grounding mode selection module, a fault simulation module, a database, an industrial personal computer communication interface. The lower computer includes at least one to-be-tested line selection device with a preset communication interface. The output terminal of the three-phase power isdirectly connected to the input terminal of the distribution network system; the output terminal of the grounding mode selection module is connected to the input terminal of the distribution networksystem; the output terminal of the fault simulation module is connected to the input terminal of the distribution network system; the input terminal of the database is connected to the output terminalof the distribution network system; and the output terminal of the database is connected with the input terminal of the industrial personal computer communication interface. The test system has advantages of simpleness, high feasibility, high reliability, low cost and high universality; and the test device has advantages of small volume, light weight and high portability.

Description

technical field [0001] The invention relates to the technical field of fault line selection in power distribution systems, in particular to a test system for the actual line selection effect of a small current grounding system fault line selection device. Background technique [0002] The domestic power distribution system of 35KV and below adopts the low-current grounding method, and the single-phase ground fault is the most important fault form of the small-current grounding system. When a single-phase ground fault occurs in a low-current grounding system, the non-fault phase-to-ground voltage rises, which is prone to system resonance and damage to the insulation of power grid equipment. If the damage accumulates to a certain extent, it will cause the explosion of the arrester or the flashover of the insulator. With the continuous increase of power grid capacity and ground current in recent years, more and more substations use the neutral point through the arc suppression ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/00
CPCG01R35/00
Inventor 任乔林高学军徐雄军张攀罗增辉
Owner STATE GRID HUBEI ELECTRIC POWER CO XIAOGAN POWER SUPPLY CO
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