Abstract This paper presents a novel distributed control technique based on the direct Lyapunov method to regulate the DC-bus voltage of a stand-alone DC micro-grid with variant power generation and consumption. This DC micro-grid consists of a photovoltaic unit, a wind-turbine unit, a micro-turbine unit, and a lithium-battery-based energy storage unit, where the energy storage system is constantly connected to the DC-bus in order to damp any DC voltage alteration. Moreover, the micro-turbine unit is set to compensate for the lack of power when a significant decrement in the generated power or a severe increment in the load power happens. In these types of energy multi-sources systems with the voltage instability, a proper distributed control technique focusing on the voltage stabilization through the current regulation of DC/DC converters is required to decrease the associated fluctuation impact of power-sharing. This paper proposes a control technique based on the comprehensive differential models of the power-converter-based generation units in which both the steady-state and dynamic operating conditions of the DC/DC converters are considered. Moreover, the stability of the generation units is analyzed using an input-output linearization technique. Simulation results in MATLAB/SIMULINK environment verify the accuracy of the energy-management-based control strategy in various operating conditions.

中文翻译：

---

基于直接李雅普诺夫方法的基于换流器的独立直流微电网的直流母线电压控制

摘要 本文提出了一种基于直接李雅普诺夫方法的新型分布式控制技术，用于调节具有不同发电量和消耗量的独立直流微电网的直流母线电压。该直流微电网由光伏单元、风力发电机组、微型发电机组和基于锂电池的储能单元组成，其中储能系统始终连接到直流母线，以便抑制任何直流电压变化。此外，当发电功率显着减少或负载功率急剧增加时，微型涡轮机组被设置为补偿功率不足。在这些电压不稳定的能源多源系统中，需要一种适当的分布式控制技术，通过 DC/DC 转换器的电流调节来稳定电压，以减少功率共享的相关波动影响。本文提出了一种基于基于功率转换器的发电机组的综合微分模型的控制技术，其中考虑了 DC/DC 转换器的稳态和动态运行条件。此外，使用输入-输出线性化技术分析生成单元的稳定性。在 MATLAB/SIMULINK 环境中的仿真结果验证了基于能量管理的控制策略在各种运行条件下的准确性。本文提出了一种基于基于功率转换器的发电机组的综合微分模型的控制技术，其中考虑了 DC/DC 转换器的稳态和动态运行条件。此外，使用输入-输出线性化技术分析生成单元的稳定性。在 MATLAB/SIMULINK 环境中的仿真结果验证了基于能量管理的控制策略在各种运行条件下的准确性。本文提出了一种基于基于功率转换器的发电机组的综合微分模型的控制技术，其中考虑了 DC/DC 转换器的稳态和动态运行条件。此外，使用输入-输出线性化技术分析生成单元的稳定性。在 MATLAB/SIMULINK 环境中的仿真结果验证了基于能量管理的控制策略在各种运行条件下的准确性。