柔性多状态开关参数辨识无差拍控制

Deadbeat control with parameter identification for soft open point

柔性多状态开关(SOP)作为一种多功能性的新型电力电子装置,既能够优化配电网中的潮流,又能够优化电压分布。文中先推导了SOP的数学模型,针对多端口SOP传统PI双环控制的PI参数较多,且整定比较困难的缺点,利用无差拍控制设计电流内环,从而减少PI控制器的数量,简化控制电路的设计。针对无差拍控制对滤波电感较为敏感,抗电感参数摄动能力差的缺点,加入参数辨识环节,对系统参数进行跟踪估计,提高无差拍控制的鲁棒性。然后就基于参数辨识的无差拍控制对各端口的U dc Q、PQ以及U ac f控制模式进行算法实现。通过在MATLAB/Simulink中进行仿真实验,验证了所提控制算法的可行性。

As a novel multi-functional power electronic device,the soft open point(SOP)can not only optimize the power flow in the distribution network,but also optimize the voltage distribution.In this paper,the mathematical model of SOP is first derived,and then,aims at the shortcomings of the PI parameters of traditional multi-port SOP double-loop control with many PI parameters and the difficulty of setting,the deadbeat control is used to design the current inner loop,thereby reducing the number of PI controllers and simplifying the design of the control circuit.Aiming at the disadvantages of deadbeat control being more sensitive to filter inductance and poor anti-inductance parameter perturbation capability,a parameter identification link is added to track and estimate system parameters to improve the robustness of deadbeat control.Then,based on deadbeat control with parameter identification,the U dc Q,PQ and U ac f control modes of each port are algorithmically implemented.The,simulation experiments in MATLAB/Simulink verify the feasibility of the proposed control algorithm.