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Protection device and loops thereof detection method under no-power-failure line condition

A line protection, inspection and protection technology, applied in the field of power system

Active Publication Date: 2015-07-01
CHINA SOUTHERN POWER GRID COMPANY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In fact, the current protection devices are all computer-based, with strong self-inspection and online monitoring functions.

Method used

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  • Protection device and loops thereof detection method under no-power-failure line condition
  • Protection device and loops thereof detection method under no-power-failure line condition

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Experimental program
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Embodiment Construction

[0034] The technical solution of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0035] figure 1 It is a schematic diagram of the connection of the external analog quantity through the test box.

[0036] The test box is connected to the line protection device through the communication interface of the line protection device, and a small signal is added to simulate the fault value for the longitudinal protection of live operation. The communication interface is Ethernet port, USB port or RS-232 port, etc. During the connection process between the test box and the line protection device, the line protection device does not shield the acquisition of external signals, but still collects the binary input, the status of the protection function pressure plate, the secondary current voltage and the AC voltage and current applied by the test box in real time. The test box is used to simulate and output the current and v...

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Abstract

The invention discloses a protection device and loops thereof detection method under a no-power-failure line condition. The protection device and the loops thereof detection method under the no-power-failure line condition mainly comprises the following steps of carrying out detection of line protection and the loops thereof under the no-power-failure line condition; respectively detecting bilateral line protection and the loops thereof; respectively detecting dually configured two sets of line protection and the loops thereof; comparing the two sets of line protection devices to check current and voltage values; existing a line pilot protection channel to be detected and disconnecting an alternating voltage switch thereof; respectively performing A-phase tripping, B-phase tripping, C-phase tripping and reclosing tests through a method of a test box and the small signal analog quantity; printing a protective action report. According to the protection device and the loops thereof detection method under the no-power-failure line condition, detection of the line protection device and the tripping and closing loops thereof is achieved under the no-power-failure condition, the working time for detection is greatly shortened, and the power failure time is reduced.

Description

technical field [0001] The invention belongs to the field of electric power systems, and in particular relates to providing means for electric power system inspection, and is a method for carrying out line protection and tripping and closing circuit inspection by adding small signal simulation fault quantities under the condition of no power failure of the line. Background technique [0002] The fundamental purpose of the inspection of line protection and its tripping and closing circuit is to check whether its working status is normal, so as to ensure that it can reliably trip when a fault occurs in the line area; after meeting the reclosing conditions, it can be reliably reclosed through its closing circuit. [0003] The conventional inspection method has been carried out in the case of power failure, and the inspection is carried out according to the relevant inspection regulations. The items to be inspected include: inspection of the scale of the protection device, inspe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
Inventor 汪际锋赵曼勇刘之尧曾伟忠张驰刘千宽陈志光曾林彭业刘世丹骆树权史泽兵徐鹏蒋绿海王建华赵志宏魏会利伍叶凯
Owner CHINA SOUTHERN POWER GRID COMPANY
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