运用多目标灰狼优化的航空有源AC/DC变换器研究

Research on Aeronautical Active AC/DC Converter Based on Multi-Objective Grey Wolf Optimizer

针对航空多电发动机传统交直流(AC/DC)变换器在减小体积、质量与抑制谐波之间存在矛盾的问题,提出了将有源电力滤波器(APF)与多边形联结自耦变压整流器(ATRU)相结合的自耦变压有源滤波整流器(ATPFRU)。由于所提新型ATPFRU是一个高度非线性的系统,设计分数阶PI控制器,并以该控制器参数为优化变量,考虑输入电流总谐波损失(THD)和直流侧储能电容电压响应性能的多目标优化问题,基于灰狼优化算法,同时实现了对输入电流谐波的有效抑制和对直流侧储能电容电压的有效控制。仿真结果表明:所提ATPFRU拓扑结构在减小AC/DC变换器体积和质量的同时,有效抑制了输入电流谐波并实现对直流侧储能电容电压的良好控制,获得了满意的多目标优化结果。

Aimed at the contradiction between reducing the weight and restraining the harmonic of traditional more-electric aero-engine AC/DC converter, a novel autotransformer power filter rectifier units （ATPFRU） was proposed by combining active power filter （APF） with autotransformer rectifier units （ATRU）. Considering the multi-objective optimization problem of input current harmonic content and voltage response performance of DC side capacitors, the fractional order PI controller whose parameters were used as optimized variables for the new ATPFRU is a highly nonlinear system. The multi-objective grey wolf optimizer was used to optimize total harmonic distortion （THD） of input current and the response performance of DC side capacitors. The results show that the proposed topology effectively restrains input current harmonic and controls the voltage response performance of DC side capacitors while reducing the weight of AC/DC converter, and the multi-objective grey wolf optimizer is verified to be effective.