Relay protection function test method for self-healing control system of intelligent power distribution network

Abstract

The invention relates to a relay protection function test method for a self-healing control system of an intelligent power distribution network comprising the steps of: step 1: before the testing, making a testing plan, arranging testing personnel and preparing related single line diagram, technical material and testing tool; step 2: checking testing line direct current screen, communication equipment, whether DTU secondary wiring, protection fixed value and parameter configuration are correct; step 3: exiting from a trip protection platen which can test lines without an action switch; step 4:connecting a switching gate outlet and a switching position signal corresponding to the DTU which needs action switch when testing to an analog switch, connecting a relay protection tester to a terminal corresponding to a switch DTU which needs to flow through the fault current when testing and setting a state sequence; step 5: connecting the GPS time synchronization triggering device to the relay protection tester, starting time synchronization and setting a relay protection tester triggering time; step 6: checking whether the analog switch works correctly; and step 7: composing a testing report.

Description

technical field [0001] The invention relates to the technical field of power grid dispatching automation, in particular to a relay protection function testing method for a self-healing control system of an intelligent distribution network. Background technique [0002] In order to meet the high requirements of power loads on power supply reliability, smart distribution network self-healing control technology has been popularized and applied. Different from the traditional current protection of distribution network, the realization of the system function depends on the information interaction between protection terminals. The fault can be located in the faulty component, and the faulty component can be isolated independently, and the power supply in the non-faulty area can be restored, and the fault handling efficiency is greatly improved. However, the existing protection function test methods of the distribution network are mainly aimed at the traditional current protection,...

AI Technical Summary

Problems solved by technology

[0004] 1. The protection terminal that only targets a single input stage current protection function cannot meet the protection function test requirements of the self-healing control system of the smart distribution network, resulting in the inability of the self-healing control system to play its advanced role

[0005] 2. For the lines that have not completed the protection function test of the self-healing control system of the smart distribution network, it is impossible to verify the correctness of the protection logic and the reliability of the device, and there is a risk of expanding the scope of fault power failure due to protection refusal, which is very unfavorable for power supply Improved reliability

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