Multi-converter operation of variable speed wind turbine driving permanent magnet synchronous generator during network fault

The full or partial rating frequency converters, in general, are used widely for the operation of variable speed wind turbine (VSWT) driven wind generators. Among the variable speed wind generators, permanent magnet synchronous generator (PMSG) which uses a full rating frequency converter for grid interfacing is drawing much attention nowadays due to its some salient features. However, considering the factors such as higher-reliability, higher efficiency, and lower harmonics, the multi-converter topology is preferable. This paper proposes a detailed control strategy of multiple parallel connected frequency converter units integrated with VSWT driving PMSG to augments the transient performance during a network disturbance.