Method and system for diagnosing the degree of ground fault of generator stator of marine nuclear power platform
A generator stator and ground fault technology, which is used in motor generator testing, measurement of electricity, and measurement of electrical variables, etc., can solve problems such as the inability to meet the requirements for safe operation of nuclear power platforms, and the inability to reflect the degree of damage caused by ground faults, so as to ensure safety. Run, ensure the effect of accuracy
Active Publication Date: 2022-02-15
HUAZHONG UNIV OF SCI & TECH
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[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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[0038] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.
[0039] The diagnosis of the generator stator ground fault degree of marine nuclear power platform needs to include the influence degree of the generator stator ground fault on the safe operation of the generator itself and the influence degree on the insulation safety of the direct-connected power distribution system. Among them, the influence degree of the fault on the safe operation of the gen...
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The invention discloses a method and a system for diagnosing the grounding fault degree of a generator stator of a marine nuclear power platform, and belongs to the field of power system protection of a marine nuclear power platform. The invention establishes a generator stator ground fault diagnosis function that integrates ground fault current and system overvoltage, which can simultaneously reflect the degree of damage to generator operation safety and distribution network insulation safety caused by a generator stator winding ground fault, and is a useful tool for marine nuclear power platforms. The generator stator grounding protection realizes the self-adaptive cut-off control method based on the fault degree and provides an effective reference to ensure the safe operation of the marine nuclear power platform power system, and provides technical reference for other generator stator grounding protection improvement methods.
Description
technical field [0001] The invention belongs to the field of marine nuclear power platform power system protection, and more specifically relates to a method and system for diagnosing the grounding fault degree of a generator stator of a marine nuclear power platform. Background technique [0002] The marine nuclear power platform is an offshore mobile power supply platform, which can be used for power supply for offshore engineering operations, power supply for offshore islands, seawater desalination, etc. The low-voltage system in the marine nuclear power platform station adopts the network source direct connection topology. Since the sensitive load of the nuclear reactor of the station has high requirements on the reliability of power supply, when the generator fails, it is hoped to avoid the impact of sudden shutdown on the system in the event of a minor fault, and to quickly To restore the normal power supply of the system after the maintenance process is completed, it ...
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IPC IPC(8): G01R31/34G01R31/52G01R31/56
CPCG01R31/343G01R31/56G01R31/52
Inventor 尹项根王义凯乔健谭力铭徐雯张哲文明浩陈卫
Owner HUAZHONG UNIV OF SCI & TECH