A fast whole group test device and method for microcomputer protection of ultra-high voltage main transformer

Abstract

The invention proposes a superhigh voltage main transformer microcomputer protection rapid assembly whole testing device and method. The technical scheme of the invention is that the device comprises a box body, a box cover, and a main control module; the interior of the box body is fixedly provided with the main control module; the main control module comprises four channels: a high-voltage side circuit breaker module, a medium-voltage side circuit breaker module, a low-voltage side circuit breaker module and a buscouple circuit breaker module; the exterior of the box body is provided with the box cover; the high-voltage side circuit breaker module, the medium-voltage side circuit breaker module, the low-voltage side circuit breaker module and the buscouple circuit breaker module respectively employ a PIC16F72 control chip which has functions of starting, stopping, resetting and synchronous timing; the device reduces the number of protection operations and switching transmission operations, and shortens the protection maintenance pre-testing time of a main transformer; and the device is safe and quick in wiring, is easy and feasible, and saves the operation of manual cooperation for measuring an outlet pressure plate when a fault analog is inputted to a relay protection apparatus.

Description

technical field [0001] The present invention relates to an electric power test equipment and method, in particular to an ultra-high voltage main transformer microcomputer protection rapid whole group test device and method. Background technique [0002] In the on-site secondary protection verification work, the trip matrix verification of the transformer protection is generally unable to realize the actual tripping of the bus tie switch for verification, and the verification of the voltage of the pressure plate at the outlet of the switch requires the cooperation of multiple people at the same time and the tripping time is sequenced It is not sure. During the protection test, if all kinds of logic are verified, it is necessary to simulate the failure of each logic and measure all the tripping outlet pressure plates at the same time. At least two people are required to add the fault simulation while holding the It takes a lot of time to measure multiple outlet pressure plates...

AI Technical Summary

Problems solved by technology

[0004] The above method has the following problems: First, when any component inside the main transformer microcomputer protection, the plug-in is damaged and replaced, and the whole set of tests is performed, the load carried by the main transformer will be cut off, and even the section and bypass circuit breakers will be cut off. The power outage scope of the accident prolongs the power outage time for accident handling; the second is that the operation is cumbersome, which increases the workload of the on-duty switching operation, especially in the operating places where the main transformer, sub-section, and bypass main wiring are complex, which can easily cause safety hazards ; The third is that the power outage time of the whole group of main transformer protection tests is too long, and the work efficiency is too low; the fourth is that the whole group of main transformer protection tests require too many on-site monitoring personnel for each circuit breaker; The circuit breaker trips and closes too many times, which can easily cause the circuit breaker to fail and reduce the service life

When inspecting the outlet pressure plate on site, the maintenance personnel usually use a pair of normally closed nodes of the relay protection tester to connect them in series to the outlet circuit. The background action situation judges the correctness of the protection logic action, but such a test method, the wiring is more complicated, and the relay protection tester node has its own limitations, which brings a lot of inconvenience to the acceptance and maintenance work. method requires a large number of different exit nodes to be replaced, which is complicated and error-prone, and causes a lot of time-wasting work

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