基于模糊免疫自适应 PID 的VSC-HVDC系统控制器的设计

摘要

Considering multiple variables and strong nonlinearity of VSC-HVDC (high voltage direct current transmission based on voltage source converter)and the difficulties in parameter setting of PI (proportion integration)control strategy, the paper discusses control strategy for converter stations of VSC-HVDC system.The paper firstly introduces dual close-loop vector control of VSC-HVDC and designs inner-loop current controller based on the idea of fuzzy immune feedback;moreo-ver,it simulates active power rise and drop at commutation side in MATLAB/Simulink platform.The simulation shows that the new controller is superior to traditional PI controller in comprehensive power track performance index and dynamic per-formance of voltage anti-interference at DC side.%针对柔性直流输电(high voltage direct current transmission based on voltage source converter, VSC-HVDC)系统多变量、非线性强的特点,以及传统双闭环比例–积分(proportion integration,PI)控制策略参数整定困难的缺点,对 VSC-HVDC系统换流站级的控制策略进行了讨论。首先对 VSC-HVDC 的双闭环矢量控制作了介绍,并基于模糊免疫反馈的思想,设计了内环电流控制器；再在 MATLAB/Simulink 平台中对整流侧有功功率提升和有功功率跌落情况进行了仿真。仿真结果表明：相对于传统的 PI 控制器,在功率跟踪的综合性能指标以及直流侧电压抗干扰的动态性能上都有较好的表现。