摘要
电力系统稳定器(power system stabilizer,PSS)是抑制低频振荡的重要手段,但现有PSS模型在很宽频带范围运行时,在幅频特性和相频特性上有时存在不协调的问题,需加以解决。提出一种分段补偿的两分支并行PSS模型,在现有PSS模型超前滞后环节上串入一个变增益环节来改善高频段的幅频特性,增加一个与原超前滞后环节并行的分支来改善PSS低频段的相位补偿能力。分析对比两分支并行PSS模型与现有PSS模型的频率特性。应用电力系统分析综合程序(power system analysis software package,PSASP),在一个实际大型电力系统中对两分支并行PSS的应用效果进行了仿真验证,效果良好。研究表明两分支PSS模型比现有PSS模型具有更好的适应性。
Power system stabilizer （PSS） is an important tool to depress low frequency oscillation. However, its amplitude frequency characteristics and phase frequency characteristic sometimes can＇t be harmonious when PSS works in broadband. The question needs to be solved. A two channels parallel PSS model was put forward. By insertion of a serial variant gain aspect in lead and lag part, its amplitude frequency characteristics of high frequency band could be improved. By adding a branch parallel to primary lead and lag part, phase compensation of low frequency band could be developed. The frequency characteristic of the two channels parallel PSS and the existing PSS model was analyzed. The application effect of the two channels parallel PSS model on actual system was validated by simulation tests using power system analysis software package （PSASP） program. Results were perfect. Study indicated that the two channels parallel PSS model has better adaptability than existing PSS model.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2010年第19期20-25,共6页
Proceedings of the CSEE
关键词
并行电力系统稳定器
低频振荡
幅频特性
相频特性
parallel power system stabilizer （PSS）
low frequency, oscillation
amplitude frequency characteristic
phase frequency characteristic
