抑制超低频振荡的水电多级频率控制参数优化

为有效抑制高水电占比西北电网的超低频振荡,针对缺乏同时研究调速系统和现场控制单元控制参数优化的现状,提出了一种抑制超低频振荡的水电多级频率控制参数优化方法。在建立系统多级频率控制模型的基础上,理论分析了抑制超低频振荡的控制参数安全域,在该安全域内以综合偏差绝对值与时间积分的乘积最小为目标,借助Matlab/Simulink平台通过粒子群算法优化了多级控制参数。基于PSCAD/EMTDC平台的时域仿真验证了抑制超低频振荡的水电多级频率控制参数理论分析和优化方法的有效性。

Optimization of multi-stage frequency control parameters of hydro power unit for ultra-low frequency oscillation suppression

For the effective suppression of ultra-low frequency oscillation in Northwest power grid with a large proportion of hydro power in China, it is crucial to simultaneously optimize multi-stage frequency control parameters of speed governing system and local control unit. To address this problem, a parameter optimization method for the multi-stage frequency control of hydropower is proposed to suppress the ultra-low frequency oscillation in this study. Based on the multi-stage frequency control model, the security region of joint control parameters for suppressing ultra-low frequency oscillation is theoretically analyzed. Moreover, with the goal of minimizing the absolute value of comprehensive deviation multiplied by the time integral in the security region, the multi-stage control parameters are optimized through particle swarm optimization using the Matlab/Simulink platform. Finally, the time-domain simulation based on the PSCAD/EMTDC platform verifies the effectiveness of theoretical analysis and optimization method of multi-stage frequency control parameters for suppressing the ultra-low frequency oscillation of hydropower.