Self-compensating longitudinal protection and adjustment synchronous controller based on mobile communication

Abstract

The invention discloses a mobile communication-based self-compensating longitudinal protection and adjustment synchronous controller. The controller includes: a box body, a power supply plug-in, a control plug-in, a CPU plug-in, a man-machine plug-in, and a communication plug-in. The present invention uses mobile communication as a means, time synchronization depends on the actual delay of the measured communication channel, and adopts precise compensation, only relying on the clock difference of the synchronization controller itself, that is, it does not require the clocks of the testers on both sides to be consistent, and does not depend on absolute time or external clock. It fundamentally solves the technical problem that the two sides of the line longitudinal protection are difficult to synchronize. Before the line is put into operation, all the experimental projects of protection switching can be completed, fully experimentally verifying the synchronization performance of the protection devices on both sides of the line, ensuring the reliable and safe operation of the line, shortening the line protection switching time, and saving the line start-up time. Make the line put into operation as soon as possible, and generate economic benefits as soon as possible.

Description

technical field [0001] The invention relates to the technical field of high-voltage power transmission, and more specifically relates to a mobile communication-based self-compensating longitudinal protection and adjustment synchronization controller. Background technique [0002] Before the longitudinal protection of high-voltage transmission lines (longitudinal differential, distance, zero sequence, etc.) is put into operation, the protection devices on both sides must be connected to the actual communication channel for exchange. The protective device on this side, the protective device on the opposite side, and the communication channel are verified to be compatible with each other after being swapped, and the action logic of the protective device is verified to be correct after swapping, so that the longitudinal protection can be officially put into operation. When the line is actually faulty, the protection devices on both sides of the line measure the fault at the same...

AI Technical Summary

Problems solved by technology

This method needs to set up a GPS antenna and relies on GPS signals. It is not convenient for the tester in the factory building, and it is also susceptible to factors such as extreme weather. Synchronous test items are often abandoned because the GPS signal cannot be received; and each item is The test personnel on both sides are determined according to the plan → the uniformity of the test parameter setting is confirmed → the test parameter is set → the test time is agreed → the test is started.

For multi-state transitional faults, because the two sides are set separately, it is cumbersome to simulate, the efficiency is low, and the experiment often does not go smoothly.

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