摘要
大负荷中心短路电流超标严重影响电网的安全稳定。谐振型限流器具有高可靠性等优点,适用于超高压电网。由于自身的结构特点,限流器的投切过程比串补复杂得多。文章分析了谐振型限流器主电路的工作特点,建立了限流器主电路的数学模型。在主电路拓扑结构的基础上设计了多种投切策略,并建立了投切策略模型,分析了其对电网的影响。在对各种模式评估的基础上得出了优化的投切策略,仿真实验验证了优化策略的合理性。
The short circuit current of large load center that excesses the regulation standard seriously endangers security and stability of power grid. By reason of its high reliability, the resonant-type fault current limiter is suitable for EHV power network. Because of its own structural feature, the switching on/off of current limiter is much more complex than series compensator. The authors analyze the working characteristics of the main circuit of resonant-type fault current limiter and establish the mathematical model for main circuit of the limiter Based on the topological structure of the main circuit, various switching on/off strategies are designed and corresponding switching on/off models are built, and the impacts of them on power network are analyzed. On the basis of evaluating various modes an optimized switching on/off strategy is obtained. Simulation experiments validate the reasonableness of the optimized strategy.
出处
《电网技术》
EI
CSCD
北大核心
2008年第4期36-39,51,共5页
Power System Technology
基金
国家电网公司科学技术项目(SGKJ[2004]03-35)
关键词
短路电流
谐振型限流器
投切策略
仿真实验
short circuit current
resonant-type fault current limiter
switching on/off strategy
simulation experiment
