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针对综合补偿系统中逆变器输出电流相位经输出滤波器、耦合变压器、无源滤波器后会产生相移的问题,分析了逆变器输出电流相移的原因,提出了广义滞后的概念和分频补偿的思路。为消除广义滞后对综合补偿系统带来的不利影响,利用逆变器输出电流与负载及晶闸管控制电抗器谐波电流极性相反等同于相位滞后π的原理,构造了一种新型π目标Smith预估器进行滞后补偿。结合广义积分器良好的分频性能,提出了基于广义滞后分频预估补偿的综合补偿系统电流广义积分控制方法,并通过仿真和实验验证了该方法的有效性和可行性。
Aiming at the problem of phase shift of inverter output current phase after output filter, coupling transformer and passive filter in integrated compensation system, the reason of phase shift of inverter output current is analyzed and the concept of generalized lag and The idea of frequency division compensation. In order to eliminate the adverse effect of the generalized lag to the integrated compensation system, a novel π-target Smith preconstruction was constructed by using the principle that the output current of the inverter and the harmonic current of the load and thyristor control reactor are opposite in polarity to the phase lag π Estimator lag compensation. Combined with the good frequency division performance of generalized integrator, a generalized integrated current control method based on generalized lag divider prediction compensation is proposed. The simulation results show that the proposed method is effective and feasible.