Keywords: permanent magnet generator, wind energy, energy storage, power smoothing, rotor inertia, wind power, power fluctuations
Wind power smoothing using rotor inertia aimed at reducing grid susceptibility
Due to wind speed variations, the output power of wind turbines fluctuates. These power fluctuations make the wind power undispatchable. Furthermore, they can cause frequency deviations and power outage particularly when wind power penetration is significant. This paper presents a novel control method to mitigate the power fluctuations using the rotor inertia as an energy storage component. Therefore, the additional energy storage system is not required. The proposed method is also modified to obtain better energy capturing efficiency. The method is analysed using mathematical and physical characteristics of the system. The efficiency of the algorithm is evaluated based on obtained equations. The energy extracting capability using this method is comparable with other methods such as maximum power extraction (MPE) algorithm. Simulation results for various cases are performed on a permanent magnet synchronous generator that verifies theoretical analysis.