采用网侧电流闭环控制的电能质量综合补偿方法  

A Comprehensive Power Quality Compensation Method Based on Feedback Control of Grid-Side Current

作　　者：梅红明[1] 王一[1] 刘建政[1] 

机构地区：[1]电力系统及发电设备控制和仿真国家重点实验室(清华大学电机系),北京市海淀区100084

出　　处：《电网技术》2013年第8期2368-2375,共8页Power System Technology

摘　　要：在各次谐波对应的同步旋转坐标系下,采用比例积分(proportion integration,PI)调节器对网侧各次谐波电流进行分次闭环控制,以有效消除采样精度、控制延时、脉冲宽度调制(pulse width modulation,PWM)死区等对补偿效果造成的影响,实现无静差补偿;在此基础上,针对负载中包含并联电容器时有源电力滤波器的稳定性问题,采用等效系统的方法进行了分析,并基于分次闭环控制提出了简单易行解决方案。数字仿真和物理试验验证了所提控制方法的的有效性。In synchronous rotating coordinate systems corresponding to various orders of harmonics,the proportion integration（PI） regulators are used to compensate various orders of harmonics by closed-loop control of grid-side current to effectively eliminate the affections of sampling precision,control system delay,dead zone of pulse width modulation（PWM） on compensation effect to implement the control with zero steady-state error.On this basis,in allusion to the stability of active power filter when shunt capacitor is contained in the load,the analysis is performed by equivalent system.By adopting order-based closed-loop control,a solution that is simple and easy to realize is given.Results of digital simulation and physical experiments show that the proposed control method is effective.

关 键 词：有源滤波器 并联电容器谐振 指定次谐波补偿 网侧电流闭环 

分 类 号：TM76[电气工程—电力系统及自动化]