摘要
为合理选择电容耦合型动态电压恢复器(DVR)中的主要元件,建立了DVR元件参数的计算模型。利用等效电路和相量图,通过分析DVR工作原理,按照电压源换流器输出电流最小原则,提出换流器开关元件、耦合电容和滤波电感的选择计算方法,并研究了一种以补偿电压为内环、以负荷电压控制目标为外环的DVR同相补偿控制系统结构。对DVR元件参数选择计算与控制方法进行电路仿真,并搭建DVR实验样机,实验结果表明采用本文控制策略的DVR对电压暂降具有较高的静态补偿准确度和快速的动态响应。
In order to make an appropriate choice for the main components of capacitor-coupled dynamic voltage restorer （DVR）, the models of the switching device, the coupling capacitor and the filter inductor of the voltage source converter were put forward. Herein, the equivalent circuit and phasor diagrams were used, and the working principle of DVR was analyzed according to that the output current of voltage source converter is minimum. At the same time, a kind of DVR in-phase compensation control structure was also studied, regarding the compensating voltage as the inner loop and the load voltage as the outer loop. Finally, the circuit simulation and experimental results show that DVR under the proposed control strategy has higher static compensation precision and faster dynamic response.
出处
《电工技术学报》
EI
CSCD
北大核心
2016年第6期212-218,共7页
Transactions of China Electrotechnical Society
基金
陕西省重点学科建设专项资金
教育部博士点基金(20126118110009)
北方民族大学科研项目(2014XBZ05)资助
关键词
动态电压恢复器
电压暂降
参数选择
控制策略
Dynamic voltage restorer, voltage sag, parameter selection, control strategy
