摘要
发电机中性点常用的接地方式一般采用经消弧线圈接地或经高阻接地。大型机组的运行实践表明,这些接地方式都不适用于额定电压24 kV和额定容量1 000 MW的巨型水轮机发电机组。在分析了上述两种接地方式在巨型水轮机组运行中存在的风险之后,提出了一种混合接地方案。计算结果表明该方式可以有效地解决采用传统方式存在的隐患,为解决千兆级机组的中性点接地问题提供了思路。
Arc suppression coil grounding or high resistance grounding is generally used in generator＇s neutral grounding. The actual operation of large generators indicates that these two neutral grounding modes are not suitable for giant hydro-generators with 24 kV rated voltage and 1 000 MW rated capacity. The risks of these two neutral groundings in the operation of giant hydro-generators are analyzed, and then a neutral hybrid grounding scheme is proposed. The calculation results show that the hybrid grounding method can effectively solve the hidden dangers of traditional ways. This research provides a new way to solve the problem of neutral grounding of Gigabit hydro units.
作者
邹祖冰
陈铁
ZOU Zubing CHEN Tie(China Three Gorges Corporation, Chengdu 610041, Sichuan, China Hubei Key Laboratory of Cascaded Hydropower Stations Operation ＆ Control, China Three Gorges University, Yiehang 443002, Hubei, China)
出处
《水力发电》
北大核心
2017年第8期91-93,共3页
Water Power
