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针对工业现场存在的不平衡负载(包括线性负载和非线性负载)导致的电网电压畸变和不平衡,在瞬时无功功率理论基础上,提出2种新检测算法及2/2变换矩阵,物理意义明确,可实时准确地分离出基波正序、基波负序及各次谐波电流,实现有源电力滤波器补偿策略的灵活选择——既可只补偿高次谐波和基波无功,充分利用有源电力滤波器的容量;亦可在容量许可的情况下同时补偿高次谐波、无功及基波负序。Matlab仿真研究和实验结果表明该算法的可行性。
Based on the instantaneous reactive power theory, two new detection algorithms and 2/2 transformation matrix are proposed for unbalanced loads (including linear loads and non-linear loads) caused by unbalanced loads in industrial sites. The physical meaning Clear, real-time and accurate separation of the fundamental positive sequence, the fundamental negative sequence and the various harmonic currents, to achieve a flexible choice of active power filter compensation strategy - either only the compensation of higher harmonics and fundamental reactive power , Make full use of the active power filter capacity; also allow the case of capacity permits the simultaneous compensation of higher harmonics, reactive power and negative fundamental sequence. Matlab simulation and experimental results show that the algorithm is feasible.