多机电力系统广泛配置PSS的可行性研究  

Study on the Feasibility of Wide Usage of PSS in Multi-Machine Power System

作　　者：陶向宇[1] 刘增煌[1] 赵红光[1] 

机构地区：[1]中国电力科学研究院,北京市海淀区100192

出　　处：《电网技术》2008年第22期29-34,共6页Power System Technology

摘　　要：美国西部电网协调委员会(WSCC)、IEEE都曾建议广泛的配置电力系统稳定器(PSS)。国内各大区域互联系统也有针对性地配置了大量的PSS,提高了系统阻尼,并且有进一步增加配置的趋势。但尚未从理论上证明广泛配置PSS的可行性,对广泛配置PSS的负作用的担心仍然存在。该文探讨多机电力系统中PSS增强系统机电振荡模式阻尼的机理:PSS主要是将非机电模式的阻尼转移给机电振荡模式,从而增强机电振荡模式的阻尼。根据特征根对参数的灵敏度分析结果可知,PSS可以显著提高与本机强相关的机电振荡模式的阻尼,对与本机非强相关的机电振荡模式的阻尼影响不大,广泛配置PSS的正作用远大于负作用。因此多机电力系统中广泛配置PSS是可行的。American Western System Coordinating Council（WSCC） and IEEE have suggested that Power System Stabilizer（PSS） should be widely used. In China, many PSS have already been used in the inter-connected grid. However, the feasibility of wide usage of PSS hasn＇t been proved in theory, as PSS may introduce some negative damping. This paper indicates that PSS mainly transfers the damping from non-electromechanical mode to the electromechanical mode. And one generator＇s PSS mainly enhances the electromechanical mode＇s damping associated tightly with the generator, while introducing very little positive or negative damping to the electromechanical mode associated weakly with the generator. The positive effect of PSS＇s wide usage is more than the negative effect. As a result, wide usage of PSS is feasible.

关 键 词：电力系统稳定器 负作用 阻尼转移 机电振荡模式 非机电模式 

分 类 号：TM71[电气工程—电力系统及自动化]