In this work, a grid side converter (GSC) control with integrated shunt active filtering function using space vector pulse width modulation (SVPWM) technique is proposed to mitigate harmonics produced by the nonlinear loads. This method is focused on removal of harmonics from the grid currents by supplying compensating currents through GSC of DFIG. The proposed control technique improves power quality and reduces Total Harmonic Distortion of the grid current. Simultaneously, it is also capable to control active power and regulate DC link voltage during variable wind speeds in the presence of nonlinear loads. Performance of the proposed technique is compared with the conventional technique considering grid-connected 2.6 MW DFIG-based wind energy conversion system using MATLAB Simulink. Performance analysis has been carried out to check the behavior of the proposed SVPWM-based modified GSC control technique to mitigate the grid current harmonics considering wide variations in various parameters. The simulation results validate the effectiveness of the proposed scheme since it achieved grid current THD within limits of 5% as per IEEE-519 standards for all wind speeds.

在这项工作中，提出了一种具有集成分流有源滤波功能的电网侧变流器（GSC）控制，该功能使用空间矢量脉冲宽度调制（SVPWM）技术来减轻非线性负载产生的谐波。该方法的重点是通过通过DFIG的GSC提供补偿电流来消除电网电流中的谐波。所提出的控制技术改善了电能质量并降低了电网电流的总谐波失真。同时，它还能够在存在非线性负载的情况下，在可变风速下控制有功功率并调节直流母线电压。考虑到使用MATLAB Simulink并网的2.6 MW DFIG风力发电系统并网的建议技术与常规技术的性能比较。已经进行了性能分析，以检查所提出的基于SVPWM的改进型GSC控制技术的行为，以考虑各种参数的较大差异来缓解电网电流谐波。仿真结果验证了该方案的有效性，因为该方案在所有风速下均达到了IEEE-519标准规定的电网电流THD限制在5％以内。