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近年来配电网中整流器、变频调速装置、电弧炉等负荷不断增加,这些负荷的非线性、冲击性及不平衡的用电特性是电力系统的电压、电流波形发生畸变,甚至引起电压波动、闪变和三相不平衡,对供电质量造成了严重的影响,因此消除电网中的谐波污染已经成为电能质量研究中的一个重要课题。有源滤波器(APF)的控制器是APF的关键部分,决定了APF的性能指标和补偿效果。控制器分别实现了谐波指令电流提取,谐波指令电流输出控制。文中将通过系统仿真验证控制器设计的可行性。
In recent years, the distribution network rectifier, frequency control devices, electric arc furnace and other loads continue to increase, the load of non-linear, impact and unbalanced power characteristics of the power system voltage, current waveform distortion, and even lead to voltage fluctuations , Flicker and three-phase unbalanced, which have a serious impact on the quality of power supply. Therefore, eliminating harmonic pollution in the power grid has become an important issue in power quality research. Active Filter (APF) controller is a key part of APF, which determines the APF performance index and compensation effect. The controller realizes harmonic command current extraction and harmonic command current output control respectively. The article will verify the feasibility of controller design through system simulation.