New techniques to improve power quality and evaluate stability in modern all-electric naval ship power systems

摘要: This dissertation focuses on two crucial issues in the design and analysis of power electronic systems modern all-electric naval ships, i.e., quality control stability evaluation. It includes three papers that deal with active filter topology, rectifier control, impedance measurement techniques, respectively. To mitigate harmonic currents generated by high-power high-voltage shipboard loads such as propulsion motor drives, first paper proposes a novel seven-level shunt which utilizes tapped reactors for parallel operations switching devices. The multi-level system has been implemented both regular digital simulation real-time simulator validation. In second paper, compensation algorithm three-phase rectifiers is proposed. Based theory multiple reference frames, it provides fast accurate regulation selected so draws balanced sinusoidal from source, even when input voltages are unbalanced contain harmonics. Extensive laboratory tests 2 kW prototype verifies effectiveness proposed scheme. last presents new technique identification dc ac systems, significantly simplifies procedure analysis. Recurrent neural networks used to build dynamic models based few signal injections, then information can be extracted using off-line training algorithms. Both hardware were validate technique.