| 引用本文: | 陈佳胜,张琦雪,郭自刚,王 光,陈 俊.核电机组注入式定子接地保护若干问题探讨[J].电力自动化设备,2016,36(10): |
| CHEN Jiasheng,ZHANG Qixue,GUO Zigang,WANG Guang,CHEN Jun.Discussion on injection-type stator grounding protection of nuclear power generator[J].Electric Power Automation Equipment,2016,36(10): |
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| 摘要: |
| 针对大型核电机组注入式定子接地保护在现场应用中的问题，提出了单双接地点切换的注入式接地电阻计算模型和分段相角补偿的方法，满足了大型核电机组定子接地保护的需要。实际工程应用表明，单双接地点切换和分段相角补偿可以大幅提高核电机组注入式定子接地保护的接地电阻计算精度。针对现有注入式定子接地保护回路断线判别逻辑以及特殊故障情况下保护的动作行为，进行了分析并给出了相应的建议。 |
| 关键词: 核电机组 注入式定子接地 单双接地点切换 分段相角补偿 |
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| Discussion on injection-type stator grounding protection of nuclear power generator |
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CHEN Jiasheng, ZHANG Qixue, GUO Zigang, WANG Guang, CHEN Jun
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Nanjing NR Electric Co.，Ltd.，Nanjing 211102，China
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| Abstract: |
| Aiming at the problems in the field application of injection-type stator grounding protection for large-scale nuclear power generator，a single-dual point grounding mode switching model for calculating the injection-type grounding resistances and a method of segmental phase-angle compensation are proposed to meet the requirements of stator grounding protection for large-scale nuclear power generator. Its field application shows the accuracy of calculated grounding resistance is significantly improved. The circuit-break discriminating logic of existing injection-type stator grounding protections and its operative behavior in abnormal conditions are analyzed，and the corresponding suggestions are given. |
| Key words: nuclear power generator injection-type stator grounding protection single-dual point grounding mode switching segmental phase-angle compensation |
