期刊
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
卷 6, 期 2, 页码 664-673出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JESTPE.2017.2786350
关键词
Control systems; dc-dc power converters; dualactive bridge; negative resistance circuits; nonlinear control; voltage control
资金
- Flexible Elektrische Netze GmbH, Forschungscampus Elektrische Netze der Zukunft
- BMBF (German Federal Ministry of Education and Research) [03EK3566B]
Power-electronics-based medium-voltage direct current (MVDC) shipboard power systems consist of several interconnected feedback-controlled switching converters. Such systems suffer from stability degradation owing to the negative incremental resistance of the constant-power loads. To tackle the stability problem, system-level stabilizing control methods were proposed acting on either the load-side or source-side converters. In this paper, the three-phase dual-active bridge (DAB3) dc-dc converter is considered to realize the MVDC bus. A master-slave control approach is introduced which not only ensures system-level stability but also optimizes the load-sharing among the DAB3 converters. A nonlinear control technique for the master controller is compared with the proportional-integral controller with linearized feed-forward compensation. The comparison is performed through the simulations in MATLAB/PLECS.
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