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通过分析静止无功发生器(Static Var Generator,SVG)的工作原理及其在配电网系统不平衡状态下的补偿原理,在传统负序电流检测方法中增添了正、负序电流分离与检测和滤波环节,提出了基于正、负dq坐标系的补偿控制策略,设计了两组分别建立在正、负序dq坐标系的PI控制器,实现了对正序和负序分量的双向同步独立控制,搭建了不平衡系统仿真模型,以系统负载不对称配电网为例进行仿真实验,结果表明所提控制策略性能优越。
By analyzing the working principle of Static Var Generator (SVG) and its compensation principle in unbalanced distribution system, the positive and negative sequence current separation and detection are added to the traditional negative sequence current detection method And the filter link, a compensation control strategy based on positive and negative dq coordinate systems is proposed. Two sets of PI controllers based on dq coordinate system of positive and negative sequence are designed respectively. The bidirectional synchronization of positive and negative sequence components Control, set up an unbalanced system simulation model, the system load asymmetric distribution network as an example for simulation experiments, the results show that the proposed control strategy superior performance.