并联型电能质量控制器的建模仿真研究

非线性负荷的应用引起了电力系统的谐波，并联型电能质量控制器因其可进行谐波抑制和无功功率补偿而得到了广泛研究。在介绍其工作原理、谐波检测电路、补偿电流发生电路的基础上，用MATLAB对其进行了基于数学模型和器件模型的两种完备的系统走模仿真，并对其谐波补偿蛄果进行了对比分析。仿真研究表明，两种建模方式的并联型电能质量控制器都可有效地补偿非线性负载产生的谐波电流，均使系统电能质量指标得到了较大改善，相对而言后者的谐波补偿效果更佳。

Modeling and Simulation of Parallel Power Quality Controller

In recent years, there is an increase of harmonics in power systems, caused by application of nonlinear loads. The parallel power quality controller (PPQC) has been widely investigated for the mitigation of harmonics current and compensation of reactive power in electrical power systems. The operation principle, harmonics detection, and the produce of compensation currents were introduced in details. Its harmonics compensation performance was simulated and compared with that of typical models of PPQC, a mathematic model and a devices model under nonideal current conditions. The simulation results with the prototype proposed demonstrate effective harmonics compensating performance of the nonlinear loads, and enhance for the power quality index. The latter is more effective for harmonics compensation.