摘要
随着水轮发电机容量的增加,目前主流的经消弧线圈接地和经配电变压器高阻接地已难以同时控制故障电流和暂态过电压在标准范围内。传统的水轮发电机中性点接地方式已不能满足要求。然而,通过使用中性点电容器接地的新型接地方式,可显著减小电容电流对发电机的影响,提高水轮发电机的性能稳定性,确实具有实际应用价值。文章研究了中性点电容器接地的工作原理及其优点,并对电容电流对发电机的影响进行了分析。结果表明,中性点电容器接地是一种可行且优良的水轮发电机中性点接地方式,能够有效改善发电机的性能表现。
With the increase in the capacity of hydroelectric generators,it is currently difficult to simultaneously control fault current and transient overvoltage within the standard range through arc suppression coil grounding and high resistance grounding through distribution transformers.The traditional neutral grounding method of hydroelectric generators can no longer meet the requirements.However,by using a new grounding method of neutral point capacitor grounding,the impact of capacitor current on the generator can be significantly reduced,and the performance stability of the hydro generator can be improved,which indeed has practical application value.The article studies the working principle and advantages of neutral point capacitor grounding,and analyzes the impact of capacitor current on the generator.The results indicate that neutral point capacitor grounding is a feasible and excellent neutral point grounding method for hydroelectric generators,which can effectively improve the performance of the generator.
出处
《今日自动化》
2023年第8期113-115,共3页
Automation Today
