大型船舶多机直流电力系统电压控制设计的思考

G. Sulligoi, D. Bosich, V. Arcidiacono, G. Giadrossi
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引用次数: 23

摘要

中压直流(MVDC)配电是未来大型船舶的一项使能技术,例如邮轮或军舰。在MVDC系统中,船上负载通常通过直接连接到MVDC总线的功率转换器馈电。对于这样的系统,一个关键的设计目标是电压稳定性,而电压稳定性会受到高带宽控制负载(恒功率负载,cpl)的影响。本文提出了一种利用发电系统作为稳定电源实现MVDC母线稳定的方法。采用快速控制的DC/DC变换器,将发电机与MVDC总线连接起来,实现对其的稳定控制,并实现发电机之间的功率共享。为此,提出了一种主动阻尼方法。通过状态反馈控制的补充线性化用于稳定DC/DC负载变换器馈电,特别是影响cpl。通过时域数值模拟验证了所提出的控制方法。所提出的控制系统的舰载可行性和性能是工作中最主要考虑的结论。
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Considerations on the design of voltage control for multi-machine MVDC power systems on large ships
Medium Voltage Direct Current (MVDC) distribution is an enabling technology for future large ships, e.g. cruise liners or military vessels. In MVDC systems, shipboard loads are normally fed through power-converters directly connected to the MVDC bus. For such systems a key design goal is voltage stability, impaired by the presence of high-bandwidth controlled loads (Constant Power Loads, CPLs). The paper proposes an approach to stabilize the MVDC bus using the generating systems as sources of stabilizing power. Fast controlled DC/DC converters, interfacing generators to MVDC bus, are employed to control it in a stable way and to provide power sharing among the generators. To this aim, an Active Damping method is exploited. A supplementary Linearization via State Feedback control is utilized to stabilize DC/DC load converters feeding particularly impacting CPLs. Proposed controls are verified by means of time-domain numerical simulations. Shipboard feasibility and performance of the proposed control systems are most considered in the work as conclusions.
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