无源滤波器参数的优化设计

Optimized design of passive filter parameters

根据工程经验和简单的技术经济指标来设计无源滤波器无法得到最优设计参数的问题,提出了一种无源滤波器的优化设计方法。该方法选择各个滤波支路的电容量作为独立的优化变量,以需要补偿的无功容量作为等式约束条件,以电网的总谐波电压含有率最小为目标来处理滤波器LC参数优化的规划问题。同时,为了提高寻优速度,应用改进遗传算法处理这类LC优化问题。对具体工程实例的计算表明,此方法不但可以找到全局最优解,而且明显提高了算法的寻优速度。

Conventional approaches in the design of passive power filters are usually based on engineering experiences and simple technical economic criterions, but the optimization of parameters can not be realized. The capacitance of each filter branch is selected as an independent optimization variable with the reactive power compensation capacity as constraint condition and minimum total voltage harmonic distortion as objective. In order to speed optimization, the improved Genetic Algorithm (GA) is adopted. It is proved by an engineering project that the optimal LC parameter can be found and the optimization speed increased.