期刊
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
卷 9, 期 2, 页码 1494-1506出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JESTPE.2019.2960111
关键词
Voltage control; Switches; Surges; Windings; Doubly fed induction generators; Reactive power; Brushless doubly-fed induction generator (BDFIG); control-winding (CW)-current orientation; dual-mode operation; power control; smooth transition
资金
- Power Electronics Science and Education Development of Delta Environmental and Educational Foundation [DREM2015001]
This article presents a unified control architecture for brushless doubly-fed induction generators (BDFIG) to operate in both standalone and grid-connected modes. By adding plug-in functional units, functions such as phase-lock, inrush current suppression, and active/reactive power regulation are achieved.
Brushless doubly-fed induction generator (BDFIG) has huge potential due to its high reliability and low maintenance costs. In order to meet the requirements of the modern grid code, the BDFIG system should have dual-mode (i.e., operating in both stand-alone and grid-connected modes) capability. Rather than using two separated systems for two modes, this article proposes a unified control architecture for dual-mode operation. Such a unified architecture is based on the stand-alone control-winding (CW) current orientation, and the grid-connected functions are realized by adding three plug-in functional units: 1) the phase-lock function is realized by adding an increment adjustment controller into the CW-angle control; 2) the inrush current during mode switching is suppressed by adding a high-pass feedforward controller into the inner-loop controller; 3) the active power and reactive power are regulated by adding an amplitude-angle controller of CW current. With the proposed unified architecture, the high-performance dual-mode operation is achieved without breaking the original CW-current orientation system, facilitating the overall system design a lot. The detailed analysis and designs are given in this article, and the experiments based on a BDFIG prototype are given to verify the feasibility.
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