具有谐波补偿功能的动态电压恢复器控制策略  

A Control Strategy for Dynamic Voltage Restorer With Harmonic Compensation Function

作　　者：王建伟[1] 胡晓光[1] 陈松松[1] 田思维[1] 

机构地区：[1]北京航空航天大学自动化科学与电气工程学院,北京市海淀区100191

出　　处：《电网技术》2013年第6期1700-1705,共6页Power System Technology

基　　金：国家自然科学基金项目(50875011);北京航空航天大学青年教师创新基金项目(911901340)的资助~~

摘　　要：为使动态电压恢复器(dynamic voltage restorer,DVR)可以补偿稳态负载电压谐波,同时保证其动态响应特性,提出一种双闭环比例积分(proportional integral,PI)控制和多重比例谐振(proportional resonant,PR)控制并联运行的单相空间矢量脉宽调制(space vector pulse width modulation,SVPWM)复合控制策略。将SVPWM技术应用到DVR的H桥逆变单元,在引入单相坐标旋转变换的基础上分析了单相SVPWM的基本原理并给出了其实现方法。单相基波同步坐标系下双闭环PI控制保证了DVR对电压暂降的补偿效果,增加了对指定次谐波补偿的电压环多重PR控制,以代替多重同步旋转坐标下的PI控制,实现了对指定次谐波电压的无静差补偿。理论分析和实验结果验证了提出的控制策略的有效性和可行性。To ensure dynamic response performance of dynamic voltage restorer （DVR） and make it enable to compensate voltage harmonics from load in the steady state, a single-phase space vector pulse width modulation （SVPWM） based hybrid control strategy composed of double closed-loop proportional integral （PI） control and multiple proportional resonant （PR） control is proposed. Applying SVPWM to H-bridge inverter unit of DVR, on the basis of leading in single-phase coordinate rotating transformation the basis principle of single-phase SVPWM is analyzed and its implementation is given. The double closed-loop PI controller in single-phase fundamental synchronous coordinate environment can ensure the compensation effect of voltage sag by DVR, and multiple PR controller with harmonic voltage-loop for the compensation to specified order of harmonic is added to replace the PI controller in multiple rotating synchronous coordinate environment, thus the astatic compensation to harmonic voltage in specified order is implemented. The effectiveness and feasibility of the proposed control strategy are verified by results from theoretical analysis and experiments.

关 键 词：动态电压恢复器 多重比例谐振控制 单相SVPWM 电压暂降 指定次谐波补偿 电能质量 

分 类 号：TM761[电气工程—电力系统及自动化]