有源电力滤波器参考补偿电流的最优控制

摘要

针对煤矿电网对电能质量治理的特殊要求，提出一种在网侧电压非正弦的情况下，计算AP F参考补偿电流的新方法。通过分析所设定的约束条件得出目标函数、等式约束和不等式约束，建立拉格朗日乘子法数学模型；通过数学计算得出各次谐波的最优电导值，从而得到期望的网侧电流，实现网侧的功率因数最大。该算法不需要复杂的迭代计算，实现简单且计算速度快，最后通过Matlab仿真验证该算法的可行性。%Aiming at the special requirements of power quality management for coal mine power grid, an optimal control of APF reference compensating current under non sinusoidal supply voltage is proposed. By analyzing the constrained conditions, the objective function, equality constrain and inequality constrain are obtained and mathematical model of Lagrange multiplier method is established. In order to obtain the desired source current and achieve the maximum power factor, the optimal conductance factor for the nth order harmonic is mathematically calculated. As this control algorithm requires no complex iterative calculation, the calculation is simple and fast. The feasibility of the proposed algorithm has been validated through Matlab simulation.