基于比例复数积分控制器的模块化多电平换流器环流抑制策略  

Suppression strategy of circulating current of modular multilevel converter based on proportional complex integral controller

作　　者：宋平岗[1] 江浪[1] 李云丰[1] 段程亭 

机构地区：[1]华东交通大学电气与电子工程学院,江西南昌330013

出　　处：《工矿自动化》2014年第9期74-78,共5页Journal Of Mine Automation

基　　金：国家自然科学基金资助项目(50577025)

摘　　要：根据模块化多电平换流器相间环流二倍频负序性质,提出了一种基于比例复数积分控制器的模块化多电平换流器环流抑制策略,通过将比例复数积分控制器的谐振频率设置为二倍频负序电网电压频率实现相间环流抑制。该策略中比例复数积分控制器不存在系统参数,无需旋转坐标变换以及电流前馈解耦控制,避免了因系统参数变化而导致控制效果不佳的问题。Matlab/Simulink仿真实验验证了该环流抑制策略的正确性和有效性。A suppression strategy of circulating current of modular multilevel converter based on proportional complex integral controller was proposed according to double fundamental frequency negative sequence property of phase-to-phase circulating current of modular multilevel converter, which achieved circulating current suppression by setting resonant frequency of proportional complex integral controller to voltage frequency of power grid of double fundamental frequency negative sequence. In the strategy, there are no system parameters, no conversion of rotational coordinate and no current feedforward decoupling control in the proportional complex integral controller, so as to avoid the matter of poor control effect caused by changing system parameters. The simulation in Matlab/Simulink verifies correctness and effectiveness of the strategy.

关 键 词：模块化多电平换流器 相间环流 环流抑制 比例复数积分控制器 二倍频负序 

分 类 号：TD60[矿业工程—矿山机电]