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| 大型发电机中性点接地方式的反思与忧虑——致各大发电公司、发电厂和设计院同行 | |
| 引用本文： | 王维俭,桂林,王祥珩,孙宇光,盛和乐,李和,张琦雪.大型发电机中性点接地方式的反思与忧虑——致各大发电公司、发电厂和设计院同行[J].电力设备,2007,8(11):1-4. |
| 作者姓名： | 王维俭 桂林 王祥珩 孙宇光 盛和乐 李和 张琦雪 |
| 作者单位： | 1. 清华大学电机系,北京市,100084 2. 北京国电华北电力工程有限公司(华北电力设计院),北京市,100011 3. 南京南瑞继保电气公司,江苏省,南京市,211100 |
| 摘 要： | 2006年两起大型发电机毁损事故均由机端单相接地故障引起,两台发电机中性点均经接地变压器电阻接地,单相接地故障电流达4A和32A。如果发电机中性点经消弧线圈接地,使单相接地故障电流减到1~2A,就可能避免发生毁损发电机的灾难性事故。在大型发电机中性点接地方式上的经验与教训值得反思,应吸取教训,消除隐患。 |
| 关 键 词： | 大型发电机 中性点接地方式 单相接地故障 |
| 修稿时间： | 2007-03-16 |
Reconsideration and Anxiety of Neutral Grounding Mode for Large Generator |
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| WANG Wei-jian,GUI Lin,WANG Xiang-heng,SUN Yu-guang,SHENG He-le,LI He,ZHANG Qi-xue.Reconsideration and Anxiety of Neutral Grounding Mode for Large Generator[J].Electrical Equipment,2007,8(11):1-4. | |
| Authors: | WANG Wei-jian GUI Lin WANG Xiang-heng SUN Yu-guang SHENG He-le LI He ZHANG Qi-xue |
| Affiliation: | 1. Tsinghua University, Beijing 100084, China; 2. North China Power Engineering Co., Ltd., Beijing 100011, China; 3. NARI - Relays Electric Co., Ltd., Nanjing 211100, China |
| Abstract: | In 2006, two large generators, which neutrals are grounded by method of the distributed transformer (high resistance) grounded, were both damaged by the single-phase ground faults occurring at the terminals of the generators. The ground fault currents, one is 4 A, another is 32 A. If the two generators had been grounded via ground-fault neutralizers, which would limit the fault current to 1~2 A, the accidents of stator damage could not have happened. Experiences and lessons on the grounding methods of large-sized generator were worth to be reconsidered. The lessons and remove the hidden danger should be drawn and removed. |
| Keywords: | large generator neutral grounding mode single-phase ground fault |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |
