Influence of partial winding fault on electromagnetic performance of permanent magnet wind generator with double three-phase winding

Abstract In order to ensure the continuous output of electric energy, it is necessary to study the fault-tolerant operation of permanent magnet wind generator with double three-phase winding under partial winding fault. For a permanent magnet wind generator with double three-phase winding, after one of the windings is isolated due to fault, the winding distribution will have a certain effect on the generator’s output power and electromagnetic torque during derating operation. In order to find the maximum power output and electromagnetic torque output under this condition, the permanent magnet wind generator with double three-phase winding is studied in this research. A 60 kW double three-phase winding generator with 12 parallel branches is designed. By combining the parallel branches of the generator in different parallel ways, four different double three-phase winding schemes are obtained and the corresponding physical models under single winding conditions are established, simulated and analyzed, and the optimal simulation results of the four schemes are obtained. Finally, through the construction and testing of the prototype platform, the accuracy of the theoretical analysis and simulation results is verified. The results show that the permanent magnet wind generator with double three-phase winding can obtain the maximum power output and electromagnetic torque through the optimal winding combination under single winding operation, which will increase the economic benefit of the generator and sustainable utilization of wind energy.