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航空有源滤波器(AAPF)是解决飞机供电系统中电能质量问题的一种先进方案,而模块化设计对航空有源滤波器灵活性、可维护性和可靠性的提升作用巨大。首先提出并研究了一种新型模块化航空有源滤波器,分析了主电路数学模型及其混合载波PWM(CH-PWM)调制方式;其次基于损耗对比分析进行了主电路拓扑优化,推导了模块均压控制律并给出了系统控制策略;最后进行了仿真和实验验证。结果表明,模块化航空有源滤波器能够有效补偿航空电网中由典型非线性负载产生的谐波和无功电流分量,三相电网电流的总谐波畸变率(THD)均在5%以下,补偿效果显著。
AAPF is an advanced solution to the problem of power quality in aircraft power supply systems. The modular design has a huge impact on the flexibility, maintainability and reliability of the APF. First, a new type of modular APF is proposed and studied. The main circuit mathematical model and its mixed-carrier PWM (CH-PWM) modulation mode are analyzed. Secondly, based on the comparative analysis of loss, the main circuit topology is optimized, Equalizing the control law and giving the system control strategy. Finally, the simulation and experimental verification. The results show that the modular APF can effectively compensate the harmonic and reactive current components generated by the typical nonlinear load in the aeronautical grid. The total harmonic distortion (THD) of the three-phase grid current is below 5% Compensation effect is significant.