Redundancy structure of excitation system of nuclear power plant

Abstract

The embodiment of the invention discloses a redundancy structure of an excitation system of a nuclear power plant. The redundancy structure comprises a redundancy control power supply, a redundancy signal loop, a redundancy tripping loop and a redundancy rectifying bridge; and redundancy design is performed on a control power supply, a signal loop, a tripping loop and a rectifying bridge respectively, so that the above four redundancy modules can be formed. The redundancy structure provided by the embodiment of the invention is designed based on the whole plant excitation system, and redundancy requirements of the nuclear power plant, for the excitation system, are comprehensively considered; and based on the four redundancy modules, safe and stable operation of the excitation system of the nuclear power plant can be fully ensured.

Description

technical field [0001] The invention relates to nuclear power technology, in particular to a redundant structure of an excitation system of a nuclear power plant. Background technique [0002] Due to the strict requirements on safety and stability of nuclear power plants, in the design of power generation systems of nuclear power plants, redundancy design is required in the design of each subsystem. The excitation system is one of the important components of nuclear power plant power generation. In the prior art, the excitation system generally adopts two schemes of parallel redundancy and cold standby redundancy. In the parallel redundant structure, when a thyristor of the running bridge has a shoot-through fault, the adjacent arm used to turn off the thyristor in the trigger sequence will flow a phase-to-phase short-circuit current. Since the parallel redundant design is generally two branches connected in parallel, the short-circuit current will be enough to quickly fuse...

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Problems solved by technology

[0004] The technical problem to be solved by the embodiments of the present invention is to provide a comprehensive redundant structure of the excitation system of the nuclear power plant for the defect that the existing redundant structure of the excitation system of the nuclear power plant cannot meet the overall requirements of the nuclear power plant for the redundancy of the excitation system. To fully meet the overall requirements of nuclear power plants for excitation system redundancy

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