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线路或负载参数未知可能会导致有源滤波器系统失稳 .为解决系统的稳定性问题 ,将无源性控制应用于有源电力滤波器来保证系统的稳定性 .将有源滤波器和非线性负载视为一个整体 .对负载进行诺顿等效 ,把负载电压和电源电流作为状态变量 ,把补偿电流作为控制变量 ,建立系统在dq轴上的模型 .获得系统的控制律也就获得了补偿电流的给定值 .验证系统满足无源性条件之后 ,再利用无源性控制方法获得系统的控制律 .虽然算法在理论上比较复杂 ,但是实现上相当简单 .在仿真中 ,对比了容性负载 ,感性负载以及变动负载情况下的控制效果 ,仿真结果表明算法具有很好的鲁棒性 ,并能很好的保证系统的稳定性 .
Unknown line or load parameters may lead to instability of the active filter system.In order to solve the system stability problem, the passive control is applied to the active power filter to ensure the stability of the system.Active filter and non Linear load as a whole.Norton equivalent to the load, the load voltage and supply current as a state variable, the compensation current as a control variable to establish the system on the dq axis model.Get the control of the system will be compensated The given value of current.After verifying the system satisfies the passive condition, the passive control method is used to obtain the control law of the system.Although the algorithm is more complicated in theory, it is quite simple to implement.In the simulation, Load, inductive load and fluctuating load. The simulation results show that the algorithm has good robustness and can well guarantee the stability of the system.