The threat that voltage dips impose on wind power generation

A better understanding of the problems associated with voltage dips at the terminals of these generators is necessary to ensure rotor side converters are adequately rated and protected. Loss of generation during a critical period of a voltage dip can also introduce stability problems on the network and thus it is important that this problem is addressed. The response of the rotor circuit of the generator to a voltage dip is presented. The influence of trapped flux in the generator at the instant of voltage recovery appears to generate rotor currents that can be sufficient to damage converter devices. Measurements and simulations are presented to further analyse the threat of voltage dips on rotor circuit converters. The growing demand for distributed generation and renewable energy resources has seen an increase in the popularity of wind power. Wind turbines are quickly becoming cost effective sources of generation as their power ratings increase with advances in materials, power electronics and control technologies. Wind energy converters (WECs) can be