一种基于NSGA-II的低频谐振滤波器优化设计方法

舰船电力系统需要为船上各种用电设备提供安全稳定的电能,因此采用了各种电力电子装置完成电能变换,这些装置不可避免的会带来各种谐波干扰。由于受到体积重量的限制,在大功率电力系统中,若采用简单的EMI滤波器滤除低次谐波,由于所需的电容电感量较大,电感需要承担所有的工作电流,工程实现较为困难。在已知谐波频率的情况下,本文采用谐振滤波原理可在保证滤波效果的情况下有效减小滤波器的体积,并基于NSGA-II算法提出了一种谐振滤波器的优化设计方法。首先阐述谐振滤波的基本原理及设计方案,然后将谐振滤波器的初期投资、滤波后直流侧谐波含量,滤波设备的体积作为三个目标,利用NSGA-II算法求解谐振滤波器的参数。最终通过实验进行验证,设计的谐振滤波器具备良好的综合性能。

A optimization design method of low frequency resonant filter based on NSGA-II

The shipboard power system needs to provide safe and stable electrical energy for all kinds of electrical equipment. Therefore, a variety of power and electronic devices are used to complete the power conversion. These devices will inevitably bring various harmonic interference. In the high-power power system, due to the restrictions of the volume and weight, if we use EMI filter to filter out the rectifier DC side low-harmonics, due to the larger capacitance inductance, inductance need to bear all the working current, the aim is difficult to realize. In the case of known harmonic frequencies, in this paper, the principle of resonant filter can effectively reduce the volume of the filter in the case of ensuring the filtering effect, and an optimal design method of the resonant filter is proposed based on the genetic algorithm. Firstly, the basic principle and the design scheme of the resonant filter are expatiated. Then, the initial investment of the resonant filter, the harmonic content of the filtered DC side and the volume of the filtering device are taken as three targets, the genetic algorithm is used to optimize the parameters of the resonant filter. Finally, the experimental results show that the designed resonant filter has good comprehensive performance.