PSS2B型电力系统稳定器高增益参数整定分析

Analysis on High Gain Parameter Setting of PSS2B Power System Stabilizer

针对发电机励磁系统PSS2B型电力系统稳定器现场试验临界增益与真实临界增益差距较大导致PSS无法发挥应有阻尼抑制效果的问题,提出了基于励磁振荡模态的闭环根轨迹准确求取PSS理论临界增益的仿真计算方法;提出了保持励磁系统AVR增益不变,优化相位补偿参数增大临界增益提高阻尼力矩和同步力矩的PSS高增益参数整定及试验方法。针对PSS现场试验不能及时发现PSS定值对AVC功能及系统电压影响的问题,提出了PSS高增益整定参数实时运行分析方法。

The difference between the critical gain of PSS2B type power system stabilizer field test and the true critical gain of generator excitation system will lead to the failure of PSS to exert its damping suppression effect.Therefore,a simulation calculation method for precisely obtaining critical gain of PSS theory based on closedloop root locus of excitation oscillation mode is proposed in this paper.A method for setting and testing the PSS high gain parameters of excitation system with constant AVR gain,optimized phase compensation parameters,increased critical gain,improved damping torque and synchronization torque is proposed.In order to solve the problem that the PSS fixed value can not timely find the effect on AVC function and system voltage in PSS field test,a real-time operation analysis method of PSS high gain setting parameters is put forward.