统一电能质量调节器串联变流器多频级联无源控制研究  

Study on Multi-frequency Cascade Passivity-based Control for the Series Converter of Unified Power Quality Conditioner

作　　者：慕小斌[1] 王久和[2] 孙凯[3] 吴卫民[4] 吴学智[1] 

机构地区：[1]北京交通大学电气工程学院,北京市海淀区100044 [2]北京信息科技大学自动化学院,北京市海淀区100192 [3]电力系统及发电设备控制和仿真国家重点实验室(清华大学),北京市海淀区100084 [4]上海海事大学电力传动与控制研究所,上海市浦东新区201306

出　　处：《中国电机工程学报》2017年第16期4769-4779,共11页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51477011);北京市自然科学基金重点项目(KZ201511232035);北京市高创计划教学名师项目(PXM 2017_014224_000025)~~

摘　　要：统一电能质量调节器的串联变流器数学模型是高阶模型,为了在频域中提高高阶控制系统的动静态性能,提出一种多频级联无源控制策略。首先,采用傅里叶变换技术对其交流数学模型进行频谱分解及多频直流建模,然后在被指定的频率模型上将系统降阶成级联的低阶模型;针对此级联低阶模型进行了一种新型无源控制器设计,理论分析表明所提的控制器不仅在频域上实现了对串联变流器的灵活控制,而且在无法获知控制对象精确模型时也实现了零稳态误差控制,有效克服了传统无源控制器控制性能依赖控制对象模型精度的缺点。最后,进行实验验证,实验结果表明所提的控制策略是可行的。Mathematical model of the series converter ofunified power quality conditioner （UPQC） is a high-order model. In order to improve the dynamic and static performance of the high-order system in frequency domain, a control scheme called multi-frequency cascade passivity-based control （PBC） is presented. Firstly, Fourier transform technique is applied to establish the multi-frequency DC model of the series converter, then the high-order system can be considered as a cascade low-order system onthe selected frequency model, anda novel PBC controller is designed based the cascade model. Theoretical analysis shows that it can not only realize flexible control for the series converter on frequency domain, but also achieve zero steady-state error control at selected frequency with inaccurate model parameters, and it can overcome the shortcoming that traditional PBC can hardly achieve zero steady-state error with inaccurate model parameters. Finally, experimental results verifythat the proposed control strategy is feasible.

关 键 词：统一电能质量调节器 串联变流器 高阶系统 多频 级联控制 无源控制 

分 类 号：TM46[电气工程—电器]