The hybridization of power systems offers the low-emission and energy-efficient marine vessels. However, it increases the complexity of the power system. Design, analysis, control, and optimization of such a sophisticated system require reliable and efficient modeling tools to cover a wide range of applications. In this work, a typical dc hybrid power system model is developed using a bond graph modeling approach. Necessary component models of varying degrees of fidelity are developed and integrated to build a system model with reasonable accuracy. The developed system model, along with the rule-based energy management system, is used to simulate the entire system and to investigate the load-sharing strategies, as well as the system stability in various operating scenarios. Moreover, the simulation results are validated with experimental results conducted on a full-scale laboratory setup of the dc hybrid power system and with a ship load profile. The results show that the system model is capable of capturing the fundamental dynamics of the real system. The hybrid power system model is further used to analyze the bus voltage deviation from its nominal value. The computational efficiency presented by the system is fairly good as it can simulate faster than real-time. The developed system model can be used to build up a comprehensive simulation platform for different system analysis and control designs.

中文翻译：

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船用直流混合动力系统的动态建模，仿真和测试

电力系统的混合提供了低排放和高能效的船舶。但是，这增加了电源系统的复杂性。这种复杂系统的设计，分析，控制和优化需要可靠且有效的建模工具来覆盖广泛的应用。在这项工作中，使用键合图建模方法开发了典型的直流混合动力系统模型。开发并集成了不同逼真度的必要组件模型，以构建具有合理精度的系统模型。所开发的系统模型与基于规则的能源管理系统一起，用于模拟整个系统并研究负载分担策略以及各种操作场景下的系统稳定性。而且，仿真结果通过在直流混合动力系统的大型实验室设置上进行的实验结果以及船载曲线进行了验证。结果表明，该系统模型能够捕获实际系统的基本动态。混合动力系统模型还用于分析母线电压与其标称值之间的偏差。该系统提供的计算效率相当不错，因为它可以比实时模拟更快。所开发的系统模型可用于构建用于不同系统分析和控制设计的综合仿真平台。混合动力系统模型还用于分析母线电压与其标称值之间的偏差。该系统提供的计算效率相当不错，因为它可以比实时模拟更快。所开发的系统模型可用于构建用于不同系统分析和控制设计的综合仿真平台。混合动力系统模型还用于分析母线电压与其标称值之间的偏差。该系统提供的计算效率相当不错，因为它可以比实时模拟更快。所开发的系统模型可用于构建用于不同系统分析和控制设计的综合仿真平台。