一种改进型UPQC拓扑混合无源控制  

An Improved Topological Hybrid Passivity Control for UPQC

作　　者：陈美锋 王久和[1] 杨钦淞 夏亮 Chen Meifeng;Wang Jiuhe;Yang Qinsong;Xia Liang(School of Automation,Beijing University of Information Technology,Beijing 100192)

机构地区：[1]北京信息科技大学自动化学院

出　　处：《东北电力大学学报》2019年第6期78-84,共7页Journal of Northeast Electric Power University

基　　金：国家自然科学基金项目(51777012/51477011);北京市自然科学基金-教委联合资助项目(KZ201911232045)

摘　　要：为了提高统一电能质量调节器(Unified Power Quality Conditioner,UPQC)的经济性和实用性,提出一种改进型UPQC拓扑结构,该结构可在保证电能补偿效果的基础上,可大幅降低对变流器补偿容量和公共直流侧电压等级的要求.通过分析UPQC补偿原理和建立数学模型,对其串联变流器和并联变流器分别进行控制.为加快系统能量收敛,利用注入阻尼的方法,设计了串联变流器电流内环无源控制器,电压外环使用了自抗扰比例积分控制,增强了系统的抗扰动能力,以实现对电网侧畸变电压的补偿;并联变流器采用双闭环控制,与无源滤波器共同完成对负载谐波电流的补偿.最后在Matlab/Simulink环境下仿真,结果验证了所提拓扑结构和控制策略的可行性.In order to improve the economy and practicability of the unified power quality conditioner(UPQC),an improved UPQC topology is proposed,which can greatly reduce the requirements for the compensation capacity of the converter and the voltage level of the common DC side on the basis of guaranteeing the power compensation effect.By analyzing UPQC compensation principle and establishing mathematical model,the series converter and parallel converter are controlled respectively.In order to speed up the energy convergence of the system,a passive current inner loop controller of series converter is designed by using injection damping method.The active disturbance rejection proportional integral control is used in the voltage outer loop to enhance the anti-disturbance ability of the system so as to compensate the distortion voltage on the grid side.The shunt converter adopts double closed-loop control and passive filter.The harmonic current of the load is compensated by the waveforms.Finally,the simulation results in the environment of Matlab/simulink verify the feasibility of the proposed topology and control strategy.

关 键 词：统一电能质量调节器 无源滤波器 谐波补偿 无源控制 自抗扰比例积分控制 

分 类 号：TM761[电气工程—电力系统及自动化]