Abstract：In order to make dynamic voltage restorer compensate the low-order harmonic voltages, overcome the influences of digital control on system performance, and improve the voltage compensation effects, a novel double closed-loop digital control strategy, consisting of voltage loop fundamental PR(Proportional Resonant) control and inductive current loop selective harmonic PR control, was proposed. The discrete effects of virtual LC method and step response method were mainly analyzed, the more immediate digital design method was applied to escape the influence of factors, like sampling and calculation delay, on steady-state error and dynamic response characteristics, and the detailed parameter designs of the fundamental PR controller and selective harmonic PR controller were carried out in the discrete domain. Based on the theoretical analysis, 11kV·A DVR prototype was developed and tested. The experimental results show that DVR prototype can meet the requirements of sensitive load on voltage quality and digital control system has good dynamic response.
王建伟, 胡晓光, 陈松松. 动态电压恢复器的谐波补偿数字控制技术[J]. 电工技术学报, 2014, 29(10): 239-245.
Wang Jianwei, Hu Xiaoguang, Chen Songsong. Harmonic Compensation Digital Control Technology of Dynamic Voltage Restorer. Transactions of China Electrotechnical Society, 2014, 29(10): 239-245.
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2014, Vol. 29 
