Emergency operation method based on restart of generator after failure of generator outlet circuit breaker

Abstract

The invention discloses an emergency operation method based on restart of a generator after failure of a generator outlet circuit breaker. An original generator outlet circuit breaker is replaced withan isolated-phase enclosed bus, related secondary circuits and functions are transformed according to a generator-outlet-circuit-breaker-free mode, and the generator and a main transformer adopt a direct connection temporary operation mode. The method solves the major production and operation safety problems that circuit breakers are arranged between the generator and the main transformer and onthe high-voltage side of the main transformer simultaneously, the generator outlet circuit breaker cannot be used due to failure of primary equipment of the generator outlet circuit breaker in emergency, and the generator can be connected to the grid for power generation only after the generator outlet circuit breaker is integrally replaced, the generator cannot be recovered in a short time, the equipment fault identification property is upgraded, and the electric quantity is abandoned in flood seasons and peak-to-peak summer periods. The method is scientific and reasonable in design, the whole construction period only needs about 20 days, and the problem that the generator set safely sends out the generating capacity in a grid-connected mode under the condition that the outlet circuit breaker breaks down can be effectively solved.

Description

technical field [0001] The invention belongs to the technical field of power systems, and in particular relates to an emergency operation method based on restarting a generator after a generator outlet circuit breaker fails. Background technique [0002] In the generator-transformer unit wiring of the power plant, a generator outlet circuit breaker is set between the generator and the main transformer, and a main transformer high-voltage side circuit breaker is also set on the high-voltage side of the main transformer. In order not to affect the operation mode of the grid, after the main transformer is connected to the grid through the high-voltage side circuit breaker during normal operation, the high-voltage side circuit breaker will not be disconnected. column) to connect (disconnect) with the main transformer, so as to realize the output of generator electricity. [0003] In an emergency situation, due to an equipment failure of the outlet circuit breaker of the generat...

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Problems solved by technology

[0005] In order to overcome the deficiencies of the prior art, the present invention proposes a scheme based on an emergency operation method for restarting the generator after the generator outlet circuit breaker fails. Under the fault of the generator set, the problem of safely connecting the generator set to the grid to send the generated electricity has further solved the major safety production and operation problems such as upgrading the nature of equipment failure identification, and abandoning electricity during the flood season and peak summer.

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