摘 要:随着社会的不断发展，居民的生活对电能依赖性越来越高，致使越来越多的电力电子装置投入到电网的运行之中，使得电网的谐波污染问题日益严重，对电力系统中的设备和装置产生严重损害，影响电能的正常供应，特别是在电力装置发生短路，或电气设备发生故障时，系统中的谐波分量受到其影响，将进一步增大。
本文通过在传统双绕组电力变压器上附加控制绕组，并对其注入补偿电流，从而对负载侧产生的谐波电流进行抑制，以保障电网侧电流不受其影响。在对谐波电流检测时，本文采用以瞬时无功功率为基础的 电流检测法；在对补偿电流进行控制时，本文采用三角波控制方法。最后通过Matlab对该方案进行建模和仿真，结果证明该方法对主要次谐波具有良好的抑制效果。
关键词：谐波抑制 有源滤波器 电流检测法 三角波比较控制 Matlab仿真
ABSTRACT:With the continuous development of society, people's life dependence on electricity is higher and higher, making more and more into the operation of the power grid, power electronic devices of power grid harmonic pollution problem is increasingly serious, serious damage to equipment and devices in power system, affect the normal supply of electricity, especially the short circuit in an electrical device, or electrical equipment failure occurs, the harmonic component in the system by its influence, will further increase.
Based on traditional double winding additional control on power transformer winding, and the injection of compensation current, thus to restrain of load harmonic current generated in the side, in order to ensure the grid side current is not influenced by it. When the harmonic current detection, this paper based on the instantaneous reactive power IP-IQ current test; When the compensation current control, this paper adopts triangle wave control method. At last, through the Matlab modeling and simulation of the scheme, the results show that the method has good inhibition effect on main harmonic.
Keywords: Harmonic suppression; active filter; IP - IQ test current; Triangle wave comparison control method; The matlab simulation
