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针对大容量非线性负载谐波补偿问题,提出了基于自适应谐波检测算法的有源电力滤波器(APF)模块化控制策略。自适应谐波检测算法不仅可以抑制非正弦电压对电流检测的影响,而且能够快速跟踪谐波电流。基于容量的比例均流控制策略具有补偿灵活,易于实现冗余控制的优点;当补偿量超过装置容量时,根据自身容量对谐波进行补偿。最后对模块化并联系统进行了稳定性分析。理论分析和仿真结果表明,所提出的APF模块化控制策略适合于大容量谐波补偿,并且可以提高系统的稳定性和安全性。
In order to solve the problem of large-capacity nonlinear load harmonic compensation, an adaptive power filter (APF) modular control strategy based on adaptive harmonic detection algorithm is proposed. The adaptive harmonic detection algorithm can not only suppress the influence of non-sinusoidal voltage on the current detection, but also can quickly track the harmonic current. The capacity-based proportional current sharing control strategy has the advantages of flexible compensation and easy realization of redundant control. When the compensation exceeds the capacity of the device, the harmonic is compensated according to its own capacity. Finally, the stability of the modular parallel system is analyzed. Theoretical analysis and simulation results show that the proposed APF modular control strategy is suitable for large-capacity harmonic compensation, and can improve system stability and safety.