电力系统传动转矩控制器低频振荡控制方法研究

转矩控制器时常发生的低频振荡问题,不仅影响电力系统正常运行、对相关系统设备具有较大危害,而且电力系统参数的过快变化,也在一定程度上提升了低频振荡的控制难度,为此,面向电力系统中的转矩控制器,提出一种低频振荡控制方法.根据网压信号构建系统的状态空间模型方程,经初始化与重采样处理粒子集,依据粒子最优状态估计去除信号噪声,基...

Research on Low Frequency Oscillation Control Methods of Power System Transmission Torque Controller

The frequent low-frequency oscillation of the torque controller not only affects the normal operation of the power system and does great harm to the relevant system equipment,but the rapid change of power system parameters also increases the control difficulty of low-frequency oscillation to a certain extent. Therefore,a low-frequency oscillation control method for the torque controller in the power system is proposed in this paper. The state space model equation of the system is constructed according to the network voltage signal,the particle set is processed through initialization and resampling,the signal noise is removed according to the particle optimal state estimation,the signal sequence is obtained based on the DQ axis model and network voltage flow,and the lowfrequency oscillation mode is identified. The converter model in the DQ coordinates is constructed by using grid side voltage,fundamental current component and input voltage. The lowfrequency oscillation controller is obtained by selecting controller state variables,designing sensitivity test strategy and formulating weighted function extraction conditions. In the simulation experiment stage,through the grid voltage waveform of the generator,the voltage and current waveform of the AC side of the converter and the voltage waveform of intermediate DC circuit,it is verified that the proposed method can better control the phenomenon of low-frequency oscillation and effectively suppress the influence of the number of generators.