| 引用本文: | 党晓强,邰能灵,王海田,黄 彬.大型水轮发电机定子接地方式及其继电保护的相关问题分析[J].电力自动化设备,2012,32(7): |
| DANG Xiaoqiang,TAI Nengling,WANG Haitian,HUANG Bin.Analysis of stator grounding modes of large-scale hydro-generator and its protection[J].Electric Power Automation Equipment,2012,32(7): |
|
| 摘要: |
| 分析了目前我国大型水轮发电机定子中性点接地的主要方式及其单相接地继电保护原理和存在的问题。分析了中性点经配电变压器接地方式和经消弧线圈接地方式各自的优点和不足，讨论了现阶段双频式保护的原理和导致其误动的原因以及相关的防范措施。介绍了外加电源注入式保护和一些新技术的发展情况。最后对大型水轮发电机定子单相接地保护技术做了总结和展望。 |
| 关键词: 水轮发电机 定子单相接地 中性点接地方式 继电保护 故障诊断 接地 故障分析 |
| DOI： |
| 分类号: |
| 基金项目: |
|
| Analysis of stator grounding modes of large-scale hydro-generator and its protection |
|
DANG Xiaoqiang, TAI Nengling, WANG Haitian, HUANG Bin
|
|
School of Electronic Information and Electrical Engineering，Shanghai Jiao Tong University，Shanghai 200240，China
|
| Abstract: |
| The main grounding modes of stator neutral-point for large-scale hydro-generator in China and its single-phase grounding protection are analyzed，as well as the existing problems. The advantages and disadvantages of the neutral-point grounding mode through power distribution transformer or arc suppression coil are analyzed. The operating principle of dual-frequency protection and the causes of its malfunction and corresponding countermeasures are discussed. The development status of the external power injection protection and some new technologies are introduced. The stator single-phase grounding protection technologies for large-scale hydro-generator are summarized and expected. |
| Key words: hydroelectric generators stator single-phase grounding fault neutral-point grounding mode relay protection fault diagnosis electric grounding failure analysis |
