摘要
系统故障后灵活交流输电系统(FACTS)元件可能会退出运行,其重新投入对系统的稳定性影响很大,且不同的投入时刻影响不同。分析了FACTS元件最佳投入时刻机理,基于扩展等面积法则(EEAC)构造了计算FACTS元件在系统故障后最佳投入时刻的两机系统暂态动能函数,提出了一种基于广域同步测量系统(WAMS)测量值的FACTS元件最佳投入时刻计算方法。最后,以静止同步补偿器(STATCOM)为例,通过PSCAD/EMTDC平台搭建了四机两区域系统模型,仿真结果表明,FACTS元件在最佳时刻投入能有效平息发电机功角摇摆和联络线功率的振荡,提高系统稳定性。
The element of flexible AC transmission system （FACTS） devices, after fault of system, maybe out of operation,its reoperation has big influence on the system stability and the influence at different operation is difficult. In this paper,the mechanism of optimal switching of FACTS element is analyzed,a tra- nsient kinetic energy function of two-machine system is established to calculate optimal switching time of FACTS devices based on extended equal area criterion （EEAC）. A new method based on the measurements of wide area measurement system （WAMS） to calculate optimal switching time of FACTS devices is proposed. Finally,the STATCOM is taken as an example,the two zone four generator system models are built by way of PSCAD/EMTDC platform. The simulation results show that the switching FACTS element at optimal time can calm down effectively swing of power angle of generator and power oscillation in tie line as well as improve system stability.
出处
《电力电容器与无功补偿》
北大核心
2016年第5期41-46,共6页
Power Capacitor & Reactive Power Compensation
