Marine nuclear power platform electric generator stator grounding fault degree diagnosis method and system

Abstract

The invention discloses a marine nuclear power platform electric generator stator grounding fault degree diagnosis method and system, and belongs to the field of marine nuclear power platform power system protection. According to the method, an electric generator stator grounding fault diagnosis function integrating grounding fault current and system overvoltage is established, and the harm degree of electric generator stator winding grounding faults to electric generator operation safety and power distribution network insulation safety can be reflected at the same time; effective reference is provided for implementation of a self-adaptive electric generator tripping control mode according to the fault degree for marine nuclear power platform electric generator stator grounding protection, safe operation of a marine nuclear power platform electric power system is guaranteed, and technical reference is provided for other electric generator stator grounding protection improvement methods.

Description

Technical field [0001] The present invention belongs to the field of power system protection of marine nuclear power platform, and more particularly to a marine nuclear power platform generator stator ground fault degree diagnosis method and system. Background technique [0002] The ocean nuclear power platform is a sea-moving power supply platform, which can be used for power supply, power supply, sea water, and desalination of ocean island. The low pressure system in the marine nuclear power platform has been directly connected to the topology. Since the nuclear reactor sensitive load in the station is high, when the power supply reliability is required, it is desirable to avoid sudden shocks to the system in mild failure, and can be quickly Completing the maintenance process recovery system Normal power supply, this requires self-adaptation to determine the control mode in different ground faults. [0003] However, in the current engineering application, it is limited by the m...

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Problems solved by technology

[0003] However, in current engineering applications, limited by the topological structure of marine nuclear power platforms, the generator stator grounding protection only depends on the zero-sequence voltage and the ratio of the third harmonic voltage between the machine terminal and the neutral point, which cannot reflect the degree of damage of the ground fault. The fault degree self-adaptively determines the cut-off control method, which cannot meet the safe operation requirements of nuclear power platforms

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