Journal
IEEE TRANSACTIONS ON POWER ELECTRONICS
Volume 30, Issue 2, Pages 561-573Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2014.2308222
Keywords
Control-winding-flux orientation; dc generating system; dual stator winding; efficiency optimization; induction generator (IG); wide-speed-range operation; wind power
Categories
Funding
- National High-tech Research and Development Program (863 Program) of China [2008AA05Z411]
- National Natural Science Foundation of China [51277095]
- Aviation Science Foundation of China [2012ZC52048]
- Funding of Jiangsu Innovation Program for Graduate Education [CXZZ11_0209]
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This paper presents a wide-speed-range-operation dualstator-winding induction generator (DWIG) dc generating system for wind power applications. In this system, the dc bus on the control-winding side and the dc bus on the power-winding side are connected in parallel to further widen the speed range of the constant dc voltage output, especially at low speeds. Based on the control mechanism of the DWIG and the instantaneous power theory, a control-winding-flux-orientation control strategy is employed. In order to improve the wind energy conversion efficiency at low wind speeds, the generator efficiency optimization method is investigated. The experimental results from a 20 kW/600 V prototype show that the proposed generating system can output the constant dc voltage in a speed range of 1:4, and the generator efficiency in the low speed range is improved, which both bring the advantages for wind power applications, such as expanding the scope of the wind energy utilization and capturing much more wind energy.
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