This paper suggests an experimental implementation study of the Wind Energy Conversion System (WECS) based on efficient Direct Power Control (DPC). Stand-alone mode for variable wind speed application using Doubly-Fed Induction Generator (DFIG) is studied and developed in this work. Due to the wind power performance limitation of traditional PI controllers, such as overshoot, response time, and static error; IP (integral–Proportional) controllers is replaced instead of the PI to control rotor current $d$–$q$ components ($I_{\mathrm{rd}}$ and $I_{\mathrm{rq}}$) in a Park frame through AC–DC–AC converter. A comparative experimental study was implemented to improve the power quality using L, LC & LCL passive filters between the DFIG’s rotor circuit and the inverter. Experimental results prove that the proposed DPC under stand-alone mode with LCL-Type filter could operate in several conditions despite the sudden wind speed variations. It improves the unity power factor grid operation ($\approx$0.98), dynamic responses, and the decoupled power control with high wind power performances: good reference tracking, short response time, neglected overshoot, and low power error. The power quality injected into the RL-load satisfied the limit specified by IEEE harmonic standard 519 (less than 5%).

本文提出了基于高效直接功率控制 (DPC) 的风能转换系统 (WECS) 的实验实施研究。在这项工作中研究和开发了使用双馈感应发电机 (DFIG) 的可变风速应用的独立模式。由于传统PI控制器的风电性能限制，如超调、响应时间、静态误差等；更换 IP（积分-比例）控制器而不是 PI 来控制转子电流$d$–$q$成分 （${我}_{\mathrm{rd}}$和${我}_{\mathrm{rq}}$) 在 Park 框架中通过 AC-DC-AC 转换器。实施了一项比较实验研究，以在 DFIG 的转子电路和逆变器之间使用 L、LC 和 LCL 无源滤波器来改善电能质量。实验结果证明，尽管风速突然变化，所提出的带有 LCL 型滤波器的独立模式下的 DPC 可以在多种条件下运行。它提高了单位功率因数电网运行（$\approx$0.98），动态响应，以及具有高风电性能的解耦功率控制：良好的参考跟踪，短响应时间，忽略超调和低功率误差。注入 RL 负载的电能质量满足 IEEE 谐波标准 519 规定的限制（小于 5%）。