基于虚拟电容补偿的级联型有源电力滤波器控制策略

Cascaded active power filter control strategy based on virtual capacitor compensation

级联型有源电力滤波器(APF)可用于中高压系统中的谐波补偿,为改善传统直接电流控制策略指令跟踪能力和抵抗电网电压干扰能力较差的问题,本文提出一种基于虚拟电容补偿的级联型有源电力滤波器控制策略。通过分析对比指令电流两种不同补偿方式,得出基于指令电流前馈补偿的谐波输出控制策略在保证指令跟踪能力的基础上具有更强的抵抗电网电压干扰能力的结论。PSCAD仿真实验验证了所提方法的可行性和优越性。

Cascaded active power filter(APF)can be used for harmonic compensation in medium and high voltage systems.In order to improve the poor command tracking ability and resistance to grid voltage interference of traditional direct current control strategy,a cascaded APF control strategy based on virtual capacitor compensation is proposed in this paper.By analyzing and comparing two different compensation methods of command current,the harmonic output control strategy based on the command current feedforward compensation has a stronger ability to resist grid voltage interference on the basis of ensuring the command tracking ability.Simulation and experiments verify the feasibility and superiority of the proposed method.