标准测试系统中PSS参数协同优化与配置研究

Coordinated Optimization and Placement of PSS in IEEE-57 Bus System

选取IEEE-57节点测试系统进行振荡模式、阻尼特性和电力系统稳定器(power system stabilizer,PSS)投退分析,校核系统PSS配置的合理性及抑制低频振荡的效果。基于自适应加速粒子群算法分3步对测试系统进行PSS参数协同优化和配置,第一步对15号机PSS参数进行单机优化,对比系统阻尼;第二步对18号机进行PSS配置及其参数优化,提高测试系统阻尼;第三步对15、18号两机进行PSS参数协同优化,获得更高阻尼特性的参数。利用小干扰稳定时域仿真和普罗尼算法(Prony分析),验证得协同优化的PSS参数阻尼效果更好,系统动态安全稳定水平更高且PSS协同优化及配置方法有效可行。

To verify the rationality of PSS placement and effect of suppressing low frequency oscillation, the IEEE-57 test system was selected to analyze the oscillation mode and damping characteristics. SAPSO algorithm was used to coordinately optimize PSS parameters in 3 steps in the test system. Firstly, PSS parameters of＂ No. 15 were optimized in single machine infinity system. Then, the No.18 generator was placed and configured with one PSS whose parameters were also optimized to improve the damping ratio of the test system. In addition, PSS parameters of No. 15 and No. 18 were optimized coordinately to obtain higher damping. The results of time-dmnain sinmlation under small disturbances and Prony analysis demonstrates that, the damping effect of coordinately optimized PSS parameters is better and the method of coordinated optimization and placement is feasible and available.