Impacts of Grounding Configurations on Responses of Ground Protective Relays for Fuzzy Logic Controller Fed DFIG-Based Wind Generation
Wind energy has gained an increasing worldwide interest due to the continuous increase in fuel cost and the need to have a clean source of energy. The main objective of most of the wind energy systems is to extract the maximum power available in the wind stream. However, the wind regime varies continuously and thus the system controllers should be updated to follow these variations. This paper is intended to apply fuzzy logic control techniques to overcome the effect of the wind speed variations on the parameters of the wind turbines and their controllers. This paper investigates impacts of the grounding configuration on the performance of protective devices used to protect DFIGs-based WECSs from electrical ground faults. Investigated grounding configurations include solid grounding, low-resistance grounding, high-resistance grounding, and no grounding. This paper also investigates the use of a capacitor in parallel with a low resistance, as a grounding configuration, to limit ground potentials, reduce ground currents, and minimize impacts on responses of ground protective relays.
Double Fed Induction Generator (DFIG), Fuzzy Logic Controller (FLC), Wind Energy, Grounding Faults