加速度功率型PSS参数整定对次同步振荡的影响

The Influence of the Parameter Setting of Acceleration Power PSS on Subsynchronous Oscillation

PSS是附加在现代励磁系统的一个调节设备,是提高电[2]力系统动态稳定水平的有效手段之一。但PSS的加入可能会引起次同步振荡的产生。除了输入信号类型之外,电力系统稳定器(PSS)的参数整定也是影响次同步振荡非常重要的因素。针对目前国内普遍应用的PSS2B型电力系统稳定器,通过对PSS2B中功率匹配系数和扭振滤波环节时间常数的研究与整定,利用频率响应分析法,得到PSS-AVR励磁系统有补偿的相频特性,从而分析出对次同步振荡信号达到较好抑制或者消除作用的功率匹配系数和扭振滤波环节时间常数。利用电力系统全数字仿真装置电磁暂态计算平台(ETSDAC)进行仿真校核,结果表明:所整定得出的加速度功率型PSS在抑制低频振荡的同时,对次同步振荡信号也有较好的抑制效果,具有可行性。

PSS is a regulating device attached to modern excitation system,and it is one of the effective means to improve the dynamic stability level of power system,but the addition of PSS may cause the generation of sub-synchronous oscillations.In addition to the input signal types,parameter setting of power system stabilizer(PSS)is also very important factors to influence subsynchronous oscillation,in view of the present domestic PSS2B model of universal application,through to the PSS2B matching in the power system stabilizer power coefficient and the torsional filter time constant research and adjustments,Compensated phase frequency characteristics of PSS-AVR excitation system obtained by frequency response analysis,and analysis of subsynchronous oscillation signals to achieve better suppress or eliminate the effect of power matching coefficient and torsional filter time constant.The electromagnetic transient computing platform(ETSDAC),a full digital simulation device of the power system,was used for the simulation and verification.The results showed that the PSS of the acceleration power type obtained by the calibration could not only suppress the low-frequency oscillation,but also suppress the sub-synchronous oscillation signal.