不平衡电网下MMC的PCHD模型无源滑模控制策略  

Passive Sliding Mode Control Strategy for PCHD Model of MMC in Unbalanced Power Grid

作　　者：刘道兵[1] 鲍妙生 李世春[1] 郭汉琮 郭营营 齐越 LIU Daobing;BAO Miaosheng;Li Shichun;Guo Hancong;Guo Yingying;Qi Yue(College of Electrical Engineering and New Energy,China Three Gorges University,Yichang 443002,China;Stead Grid Hebei Electric Power Co.,Ltd.Xiong’an New Aera Power Supply Company,Xiong’an New Aera 071000,China)

机构地区：[1]三峡大学电气与新能源学院,湖北宜昌443002 [2]国网河北省电力有限公司雄安新区供电公司,河北雄安新区071000

出　　处：《中国电力》2023年第8期109-116,共8页Electric Power

基　　金：国家自然科学基金资助项目(51907104)。

摘　　要：电网电压不平衡时,以模块化多电平换流器(modular multilevel converter,MMC)作为换流装置的直流输配电系统会出现交流电流不对称、有功无功二次脉动等问题。为此,提出一种基于端口受控耗散哈密顿(port-controlled hamiltonian with dissipation,PCHD)模型的无源控制(passivity-based control,PBC)和滑模控制(sliding-mode control,SMC)的混合控制策略,设计出了PCHD模型下MMC控制系统的无源滑模变结构控制器规律,并通过仿真验证了所提方法较PI控制、无源控制等方法具有更加良好的控制效果。When the voltage of the power grid is unbalanced,the DC transmission and distribution system using modular multilevel converters(MMC)as converter devices will encounter problems such as AC current asymmetry and secondary pulsation of active and reactive power.Therefore,a hybrid control strategy of passive based control(PBC)and sliding mode control(SMC)based on port controlled dissipative Hamiltonian with Dissipation(PCHD)model is proposed.A passive sliding mode variable structure controller for MMC control system under PCHD model is designed further.Through simulation,it is verified that the proposed method has better control performance than common methods such as PI control and passive control.

关 键 词：模块化多电平换流器 电网电压不平衡 PCHD模型 无源控制 滑模控制 

分 类 号：TM46[电气工程—电器] TP273[自动化与计算机技术—检测技术与自动化装置]