Analysis and Control of Fault Ride-Through Capability Improvement for Wind Energy Conversion System Using Linear Active Disturbance Rejection Control With Correction Link

Wind energy, as a kind of renewable natural energy, is spread all over the world. It is one of the most widely used and promising green energy to adjust the energy structure. Therefore, wind energy conversion systems (WECSs) have captured a great deal of attention in renewable energy sources for the past few years. In order to improve the transient stability and deal with non-linearity, variable parameters, strong coupling, and multi-variables an linear active disturbance rejection control with correction link (LADRC-CL) strategy is proposed for the WECS based on the permanent magnet synchronous generator (PMSG). The LADRC-CL completes with a conventional PD control rule, the linear extended state observer (LESO) and a correction link. Its convergence, stability and disturbance rejection ability were analyzed in frequency domain. Furthermore, the mathematical model of the WECS is analyzed and part of the model information is written into the LESO matrix to effectively reduce the LESO observation burden. In an experiment, the control performance of the LADRC-CL was also tested under various operating conditions using the 3.6MW power unit full true wind field simulation experiment platform to verify the correctness, validity and reliability of the linear active disturbance rejection control with correction link.