Operating characteristics of an electromagnetic coupler wind turbine generator system

CHEN Jihe; LIN Yulong; CHAI Jianyun; LI Jie

doi:10.16511/j.cnki.qhdxxb.2015.21.015

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Journal of Tsinghua University(Science and Technology) ›› 2015, Vol. 55 ›› Issue (11) : 1253-1257. DOI: 10.16511/j.cnki.qhdxxb.2015.21.015

ELECTRICAL ENGINEERING

Operating characteristics of an electromagnetic coupler wind turbine generator system

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Abstract

The electromagnetic coupler(EMC) wind turbine generator system(WTGS) is distinct from conventional wind turbines in that the synchronous generator is directly connected to the power gird and the output power is passed from the wind turbine gearbox via the EMC. The EMC with an inverter power supply can quickly and flexibly change the torque. This analysis includes additional torque control besides the wind turbine output torque to reduce the influence of system disturbances on the synchronous generator. WTGS and infinite power grid models are used to investigate the torque control and strategy for various system disturbances and fault conditions on the MATLAB Simulink platform. The results show that the additional torque control improves the generator system transient stability and dynamic response compared with only excitation and wind turbine pitch control. The system enables low voltage ride through(LVRT) that enhances the ability to support the grid voltage.

Key words

variable speed constant frequency(VSCF) / wind turbine generator system(WTGS) / electromagnetic coupler(EMC) / low voltage ride through(LVRT) / additional torque control

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CHEN Jihe, LIN Yulong, CHAI Jianyun, LI Jie. Operating characteristics of an electromagnetic coupler wind turbine generator system[J]. Journal of Tsinghua University(Science and Technology). 2015, 55(11): 1253-1257 https://doi.org/10.16511/j.cnki.qhdxxb.2015.21.015

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