Wind power generation by PMSG and fault protection using over-current and differential frequency relay

This paper presents a protection scheme for wind power based Permanent Magnet Synchronous Generator (PMSG). To protect the connected equipment in the generation system, over-current and differential frequency relays, are used. Massive current flow and frequency change in the power line affect the equipments. Over-current relay and differential frequency relay are used to solve these problems. A study to protect this circuit topology is carried out, performing the simulation on MATLAB®. The proposed scheme protects the power system from over-current, and frequency variation. Meanwhile, the attention is paid that the incoming and outgoing frequencies difference should be maintained to zero. During the simulation, standard values of generator speed, wind speed, and pitch angle are used. The proposed scheme is found suitable for over current and heavy frequency variation with better operating time.