Testing method of 1000kV extra high tension series-compensated protection exit loop

Abstract

The invention provides a testing method of a 1000kV extra high tension series-compensated protection exit loop. The testing method includes the steps: connecting a signal source, detecting the valuesof voltage and current, comparing the comparison result with the stored data to determine whether a fault occurs, marking the place where an alarm is given, unlocking through keywords and making remarks, and ensuring accuracy of the record. The testing method of a 1000kV extra high tension series-compensated protection exit loop can preferably uses the corresponding device to obtain the best testresult so as to protect one primary equipment, with high efficiency, and does not need a universal meter to measure on / off repeatedly, thus reducing the labor, saving the time, and avoiding the phenomenon of forgetting and loss by setting fluorescent paint on the outer wall.

Description

technical field [0001] The invention relates to the technical field of relay protection methods, in particular to a method for testing an outlet circuit of 1000 kV UHV series compensation protection. Background technique [0002] There is currently one 1000kV UHV Nanyang station in Henan Province. These substations undertake the important tasks of regional power supply and cross-regional power transmission throughout Henan Province, and the time for maintenance and power outages is strictly limited. Among them, there are 31 sets of 1000kV protection equipment, each of which has a different number of outlet circuits, ranging from more than ten to dozens. During power outage maintenance, it is necessary to test the outlet circuit of the relevant protection equipment to confirm the correctness of its action and the integrity of the circuit, and every disconnection of the UHV equipment will reduce the life of the equipment. [0003] At present, there are two traditional method...

AI Technical Summary

Problems solved by technology

During the test, the measurement personnel in front of the screen and the measurement personnel behind the screen cooperated through shouting, and after adding the simulated fault amount, each outlet pressure plate was thrown back one by one, and the multimeter measured each corresponding outlet circuit contact one by one to see if it was on or off; while the whole province There are a large number of protection inspections every year, and the number of outlet test contacts that need to be measured can be as high as hundreds of thousands. Repeated work consumes a lot of working time

[0004] The utility model with the authorized announcement number CN201314936 discloses a relay protection export logic comprehensive test device, including the comprehensive test device output contact input circuit, the electrical state analog input circuit, the comprehensive test device output contact input circuit, the electrical state The analog quantity input circuit is connected with the relay protection and automation device under test, the relay protection and automation device under test is connected with the regular open-in circuit of the comprehensive test device through the fixed-point logic outlet, and the relay protection and automation device under test passes through the sequential logic outlet and the comprehensive test The timing selection of the device is connected to the input loop, the conventional opening loop of the comprehensive test device, and the timing selection of the comprehensive testing device is connected to the output logic light signal memory circuit; however, this patent still does not solve how to quickly measure a large number of test contacts

[0005] In the invention with the authorized notification number CN103399229B, a relay protection device protection outlet test device is disclosed, which includes a casing. Several test modules are arranged in parallel in the casing, and the outer wall of the casing is provided with Connected ground terminal and measurement terminal; the test module includes a voltage measurement unit connected in series between the ground terminal and the measurement terminal for measuring the outlet voltage and a current-limiting resistor R1 for reducing the loop current value, the output terminal of the voltage measurement unit Coupled with a sound and light alarm control unit, the output ends of the sound and light alarm control unit are respectively connected to the indicator light circuit and the voice alarm circuit; this invention only describes the exit test of the relay protection device, and does not specify the number of connections that can be made. It also cannot solve the phenomenon of frequent disconnection;

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