A new PI(1 +PI) controller to mitigate power ripples of a variable-speed dual-rotor wind power system using direct power control

This work presents a new scheme of direct power command (DPC) of induction generator (IG)-based dual-rotor wind power (DRWP) systems. The suggested DPC employs a proportional-integral (1 + proportional-integral) controller (PI(1 +PI)) to regulate the IG power so as to improve the energy quality and reduces the current ripples. Ease of implementation, robustness, and simplicity are three of the biggest advantages of the proposed DPC-PI(1 +PI) technique due to the absence of additional current command loops. Also, the use of the designed PI(1 +PI) in this work leads to an improvement in both the transient performance and the overshoot of the generated energy. The IG inverter is controlled using pulse width modulation (PWM), which makes the IG-DRWP system simpler and more cost-effective to implement. Numerical results on a 1.5-MW IG-DRWP system are analyzed and compared with the DPC technique. The DPC-PI(1 +PI) improves the overshoot and steady-state error of active and reactive power compared to the DPC. As compared to the DPC, the proposed DPC-PI(1 +PI) strategy improves the current, torque, active and reactive power ripples by 54.54%, 53.43%, 63.33% and 52.98%, respectively. The designed DPC-PI(1 +PI) technique reduces the harmonic distortion of current by about 50% compared to the DPC strategy. Also, improves the steady-state error of the active and reactive power by 79.55% and 52.98%, respectively. The numerical results obtained from this work demonstrate the efficiency and effectiveness of the proposed strategy in all tests of a variable speed DRWP system based on IG compared to DPC control.