电力系统阻尼控制中的在线递推闭环子空间辨识

提出了电力系统阻尼控制中状态空间模型的在线递推闭环子空间辨识算法。在闭环条件下,基于广域测量信息,在线地辨识了包含主导低频振荡模式的系统降阶状态空间模型,并依此在线设计和更新线性二次最优部分输出辅助区间阻尼控制器以抑制区间低频振荡模式。算法具有良好的数值稳定性和较低的时间复杂度,能够实现系统模型的递推更新和辅助阻尼控制器参数的在线调整。8机36节点系统的仿真验证了算法的有效性。

On-Line Recursive Closed-Loop Subspace Identification for Power System Damping Control

On-line recursive closed-1oop subspace algorithm is proposed for state space model identification in power system damping control. Under closed-loop condition and based on wide-area measurements, reduced order state space model of the system which contains dominant low frequency oscillation modes is identified on-line. Then linear quadratic optimal part output supplementary inter-area damping controllers are designed and updated to damp the inter-area low frequency oscillation modes. The algorithm has good numerical stability and low time complexity so that system model can be recursively updated and parameters of the controller can be adjusted on-line. Simulation results of the China EPRI 8-machine 36-bus system demonstrate that the effectiveness of the algorithm.