摘要
次同步谐振(SSR)问题是由串联补偿输电网络形成的电气谐振回路的固有频率与汽轮发电机组轴系扭振固有频率互补时(其和等于同步频率)引起的。主要研究了由串补电容引起的SSR的频域分析方法的验证与研究,用到的两种方法分别是电磁暂态时域仿真法(PSCAD/EMTDC)与基于时域仿真实现的复转矩系数法(测试信号法)。采用的技术路线为两步:首先在PSCAD/EMTDC平台上建立IEEE第一标准测试系统模型,然后在所建模型上,对所采用的频域分析方法——测试信号法和时域仿真法进行对比与校验。最后对次同步谐振的防治措施及对策做了简要介绍。
If the resonant frequency of series compensated transmission network and the natural frequency of turbine - generator shaft complement each other ( the sum is equal to synchronous frequency), it may result in subsynchronous resonance (SSR). The verification and research of SSR frequency - domain analysis methods are carried out. The two methods used are electromagnetism transition condition simulation method in the time domain (PSCAD/EMTDC) and the complex torque coefficient method realized by time -domain simulation based on PSCAD/EMTDC (the test signal method), respectively. The mitigation measures of SSR are introduced in the end.
出处
《四川电力技术》
2009年第4期20-23,76,共5页
Sichuan Electric Power Technology
基金
国家重点基础研究专项经费项目(2004CB217901)
国家科技支撑计划项目(2008BAA13B01)
国家电网公司项目
关键词
电力系统
串联补偿
次同步谐振
复转矩系数法
测试信号法
时域仿真法
power system
series compensation
subsynchronous resonance
complex torque coefficient approach
test signal method
time -domain simulation method