Design of a Medium Voltage Generator with DC-Cascade for High Power Wind Energy Conversion Systems

This paper shows a new concept to generate medium voltage (MV) in wind power application avoid an additional transformer. Therefore, the generator must be redesigned with constraints and topology for rectifier system by using multiple low (LV) rectifiers connected series parallel increase DC output voltage. The combination of connection is further introduced as DC-cascade. With resulting DC-cascade, achieved without bulky approach form DC-cascade reduces effort required achieve simple system. In this context, suitable control was presented verified laboratory test setup. A gearless synchronous generator, which highly segmented so that each segment can its own rectifier, investigated. Due mixed AC given structure, it becomes more demanding design insulation, influences copper fill factor cooling strategy overall carried out considering boundary conditions.