Wide-area spare power automatic switching implementation method based on GOOSE communication

Abstract

The invention relates to a wide-area spare power automatic switching implementation method based on GOOSE communication. Only a main supply switch closest to a fault point is tripped off and only a standby power supply switch of an open-loop point is switched on through switching value information of adjacent stations transmitted by a GOOSE channel and spare power automatic switching software logic based on a principle of "self-adaptive precise positioning" when a bus loses voltage; reliable tripping forbidding main supply information is sent to the direction of the open-loop point, so that only the main supply switch closest to the fault point is tripped off, then the open-loop point standby switch is switched on, the phenomenon of repeated tripping of each stage of main power supply can be reliably avoided, and the power supply reliability is improved. According to the GOOSE standard communication mode, necessary switching value information such as locking and opening is transmitted, the remote spare power automatic switching function is achieved through cooperation with an adjacent side device, precise fault positioning and rapid fault isolation can be achieved, multiple times of tripping of main supply switches of all levels are avoided, the power failure time is effectively shortened, and power supply is rapidly recovered.

Description

technical field [0001] The present invention relates to the technical field of circuit safety, and more specifically, relates to a method for implementing wide-area standby automatic switching based on GOOSE communication. Background technique [0002] With the change of the power supply mode of the power grid, the current 35kV and 10kV distribution network substations generally adopt the wiring mode of two stations, three stations, or even multiple stations in series, and adjacent substations serve as backup power supplies for each other. In this case, often the substation does not have a backup power supply, so the traditional standby automatic switching will be invalid. [0003] Such as figure 1 As shown, a chain-type serial supply and open-loop operation wiring mode is formed between power station A and power station B. During normal operation, power station B carries the loads of three substations. backup power. If each substation is equipped with a traditional incom...

AI Technical Summary

Problems solved by technology

[0005] At this stage, there is no uniform technical standard for remote standby automatic switching in China. The remote standby automatic switchover solutions provided by various manufacturers are currently customized solutions based on engineering projects. Network), the 110kV standby self-transmission part of the 2016 version of the standard first proposed the design standard for realizing the continuous power supply of multiple sites in the chain series power supply network, but the solution provided by the standard is to skip the non-selective voltage loss sites at all levels. The main power supply, and then rely on step-by-step closing to restore power supply. This solution cannot completely and accurately locate the location of the fault point, and there are relatively long periods of voltage loss at the last stage, multiple tripping and closing of main supply switches at all levels, and backup Problems such as low success rate of self-investment

[0006] In terms of communication protocols and standards, at this stage, remote equipment and automatic switching are basically based on the standard methods determined by each manufacturer. The information sent or received can only communicate with its own devices, and cannot achieve interoperability with other devices.

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