Design of a Medium Voltage Generator and Power Converter for High Power Wind Energy Conversion Systems

Steffen, Jonas; Lengsfeld, Sebastian; Jung, Marco; Bernd, Ponick; Mercedes, Herranz Gracia; Spagnolo, A.; Schleicher, Klaus; Schäfer, Klaus

doi:10.1109/upec49904.2020.9209886

Cited by 2 publications

(2 citation statements)

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“…Sufficiently small proximity effects are achieved if the height of the conductor is chosen to be smaller than the conductor width. The different distances in the slots should be taken into account when calculating the dimensions [1]. The copper fill factor of the stator slot is calculated using the conductor and slot dimensions with…”

Section: Preliminary Design Of the Generatormentioning

confidence: 99%

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

et al. 2021

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

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Section: Preliminary Design Of the Generatormentioning

confidence: 99%

“…This paper is an extended version of [1]. The trend for wind power applications, especially for offshore wind energy conversion systems (WECS), is moving towards a rated output power of 10 to 15 MW for individual turbines [2][3][4].…”

Section: Introductionmentioning

confidence: 99%