UPQC输出滤波器的优化设计

Optimum design of output filter for UPQC

在考虑负载特性对输出滤波器影响的基础上,建立了统一电能质量控制器(UPQC)中输出滤波器的数学模型,分析并指出串并联单元的输出滤波器之间存在相互耦合的关系。以此为基础,提出了一种实用的输出滤波器参数优化设计方法,综合考虑串并联单元输出滤波器的特性和谐波电流跟踪的要求,以低频段和高频段的衰减特性最优化为目标函数,运用蚁群优化算法对UPQC输出滤波器的参数进行优化设计。仿真结果表明,与传统的方法根据经验设计的参数相比,采用优化参数后的输出滤波器能够有效减小补偿误差,改善UPQC的补偿效果。

A mathematic model of output filter is built for unified power quality conditioner,which considers the impact of load characteristics on output filter.The coupling between the output filters of serial or parallel unit is analyzed.A practical optimum design of output filter parameters is proposed based on ACO（Ant Colony Optimization） algorithm,which considers the characteristics of output filter and harmonic current tracing and takes the optimal filter attenuation character in both low and high frequency bands as its objective function.Simulative results show that,the output filter with optimum parameters lowers effectively the compensation error and improves the compensation effect of unified power quality conditioner.