Abstract

The popularity of wind turbine generator (WTG) in the field of harnessing maximum renewable-based generation has promoted doubly-fed induction generator (DFIG) based WTG in the power sector. Nevertheless, DFIG-WTG is highly influenced by the grid disturbances which further affects its fault ride through capabilities. Majority research work is focused on the symmetrical fault analysis. However, the asymmetrical fault has more pernicious influences on the DFIG system. This paper compares both the symmetrical and asymmetrical fault effect on the DFIG-WTG and presents a clear distinction on their impact. Further, power hardware in loop (PHIL) investigation is carried out to support the theoretical analysis. The system considered here is a 2.2 kW rated DFIG-WTG hardware setup, is connected to the distribution network which is simulated in real time digital simulator (RTDS), via a power amplifier. The experimentation results imply that the asymmetrical fault has a fatal impact on the DFIG wind system. Henceforth, it requires to develop a cost-effective technique to improve its fault ride through.

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