考虑零序分量的DVR智能补偿策略

DVR Intelligent Compensation Strategy by Considering Zero Sequence Component

为了提高动态电压恢复器(Dynamic Voltage Restorer, DVR)的储能利用率,降低储能装置的成本,提出了一种考虑零序分量的DVR智能补偿策略。分析了三相三线制和三相四线制下零序分量对DVR补偿性能的影响,给出了采用猫群算法的补偿电压确定方法。该算法能够根据补偿范围的变化动态调节补偿电压,解决了单一补偿策略受补偿范围限制的问题。零序分量的注入增大了DVR的补偿范围,能够有效提升DVR储能利用率。仿真实验证明,智能补偿策略能够适应补偿范围的动态变化,使DVR输出有功功率最小,实现直流侧储存能量的高效利用,提升DVR的补偿时间。

In order to improve the DVR energy storage utilization and reduce the cost of energy storage devices,this paper proposes a dynamic voltage recovery intelligent compensation strategy by considering zero-sequence components.The influence of the zero-sequence component of the three-phase three-wire system and the three-phase four-wire system on the compensation performance of the DVR is analyzed.The compensation voltage determination method is given by using the cat group algorithm.The algorithm can dynamically adjust the compensation voltage according to the change of the compensation range,and solve the problem that the single compensation strategy may fail due to the compensation range.The injection of the zero sequence component increases the compensation range of the DVR and can improve the DVR energy storage utilization.The simulation experiment proves that the intelligent compensation strategy can adapt to the dynamic change of the compensation range,minimize the active power of the DVR output,realize the efficient use of the stored energy on the DC side,and improve the compensation time of the DVR.