兼具无功补偿的动态电压恢复器  

Dynamic Voltage Restorer With Reactive Power Compensation

作　　者：巫付专[1] 苗斌玉 李曼曼 温盛军[2] WU Fu-zhuan;MIAO Bin-yu;LI Man-man;WEN Sheng-jun(Zhongyuan University of Technology,Zhengzhou 450007,China)

机构地区：[1]中原工学院,电子信息学院,河南郑州450007 [2]中原工学院,彼得堡航空学院,河南郑州450007

出　　处：《电力电子技术》2024年第11期34-37,共4页Power Electronics

基　　金：科技部重点研发计划项目(2020YFB1712403);河南省自然科学基金面上项目(222300420595)。

摘　　要：针对电压暂降造成敏感用电设备的稳定问题,提出一种基于相位动态调节与优化控制的电压补偿策略,通过检测电网电压与电流的相位差并结合二阶广义积分软锁相技术,对动态电压恢复器(DVR)输出的电压相位进行闭环控制,使电网电流与电网电压同相位,从而保证电网输出有功功率最大,DVR输出有功功率最小,在实现最小能量补偿的同时兼具了无功补偿功能;根据负载电压与给定值的误差控制DVR输出电压的幅值,使负载电压保持稳定;为提高相位与负载电压检测时有效值检测算法的运算速度,提出了一种基于复合滤波器的有效值检测算法,将交流正弦信号取绝对值,然后经过低通滤波器与陷波器滤除谐波信号得到交流信号的有效值。最后通过PSIM仿真和基于DSP28335搭建的样机系统验证了所提方法的有效性。For the stability problem of sensitive power equipment caused by voltage dips,a voltage compensation strategy based on phase dynamic regulation and optimal control is proposed.By detecting the phase difference between grid voltage and current and combining with the second-order generalised integral soft phase-locking technology,closed-loop control is carried out on the voltage phase of dynamic voltage restorer(DVR)output,so that the grid current is in the same phase with the grid voltage,thus ensuring that the active power output from the grid is the maximum and the active power output from the DVR is the minimum,and realising both reactive power compensation and minimum energy compensation at the same time.According to the error between the load voltage and the given value to control the amplitude of the DVR output voltage,so that the load voltage to maintain stability.To improve the computing speed of the RMS detection algorithm for phase and load voltage detection,a composite filter-based RMS detection algorithm is proposed.The AC sine signal is taken as an absolute value and then filtered for harmonics by a low-pass filter and a trap to obtain the RMS value of the AC signal.Finally,the effectiveness of the proposed method is verified by PSIM simulation and a prototype system built on DSP28335.

关 键 词：动态电压恢复器 无功补偿 复合滤波器 

分 类 号：TM714.2[电气工程—电力系统及自动化]