| 引用本文: | 兀鹏越,陈飞文,黄旭鹏,秦 苓,吴 斌,张 杰.1 036 MW机组注入式定子接地保护调试及动作分析[J].电力自动化设备,2011,31(3): |
| WU Pengyue,CHEN Feiwen,HUANG Xupeng,QIN Ling,WU Bin,ZHANG Jie.Commissioning and operational analysis of voltage-injection stator grounding protection for 1 036 MW unit[J].Electric Power Automation Equipment,2011,31(3): |
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| 摘要: |
| 大型汽轮发电机较多地采用2套完全相同的“零序电压 + 3次谐波”式定子接地保护，某百万千瓦级机组采用了国产注入式定子接地保护，实现了不同原理的保护双重化配置。阐述了注入式定子单相接地保护的原理，详细介绍了机组的保护静态调试、发电机静止状态下的现场调试、发电机30 % 额定电压下的现场调试内容并给出实验数据。针对机组启动调试期间发生的机端软连接开裂导致的定子接地事故，分析了该保护的实际动作情况，指出了注入式定子接地的优点。 |
| 关键词: 百万千瓦 定子接地保护 调试 |
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| Commissioning and operational analysis of voltage-injection stator grounding protection for 1 036 MW unit |
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WU Pengyue1, CHEN Feiwen2, HUANG Xupeng2, QIN Ling2, WU Bin2, ZHANG Jie3
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1.Xi’an Thermal Power Research Institute Ｃo.，Ltd.，Xi’an 710032，China;2.Huaneng Haimen Power Plant，Shantou 050310，China;3.NARI-Relays Electric Co.，Ltd.，Nanjing 211100，China
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| Abstract: |
| Large steam turbine generator unit normally adopts two identical “zero-sequence voltage plus 3rd harmonic” type stator grounding protection. The domestic voltage-injection stator grounding protection is recently applied to a unit to realize the redundant configuration of protections with different principles. The basic principle of voltage-injection stator single-phase grounding protection is introduced，and its factory commissioning，site commissioning with inoperative generator and that with 30 % rated voltage are detailed. The actual operating status for a stator grounding fault during unit startup commissioning is analyzed and its proper action shows the advantages of voltage-injection stator grounding protection. |
| Key words: million kilowatts stator grounding protection commissioning |
