煤矿直流微电网控制与协调动态优化策略研究

微电网是一种集分布式电源、储能装置、各类负荷及保护、控制设备于一体的微型电网。煤矿存在不同含量的煤层气资源，将煤层气发电与光伏和风能发电相结合组成多电源互补的煤矿直流微电网具有充分的条件和明显的优势。针对直流微电网高频状态下直流母线电压质量差的问题，在直流微电网结构和等效模型的基础上，利用系统静态特征分析方法获取直流微电网系统稳定性影响因素，提出一种直流母线电压和输出功率的动态下垂控制策略，在MATLAB/Simulink建模仿真平台构建了不同工况下的直流母线协调控制策略仿真模型并进行仿真试验验证，仿真结果表明，所采用的控制优化策略极大地提升了直流微电网供电系统的母线电压质量以及系统的协调稳定性。

Research on dynamic optimization strategy of control and coordination of DC microgrid in coal mine

Microgrid is a microgrid that integrates distributed power sources，energy storage devices，various loads，and protection and control equipment.Coal mines have coal-bed methane resources with different contents.
Combining coal-bed methane power generation with photovoltaic and wind power generation to form a multi-power complementary coal mine DC microgrid had sufficient conditions and obvious advantages.Aiming at the problem of poor DC bus voltage quality under the high frequency state of DC microgrid，based on the structure and equivalent model of DC microgrid，the system static characteristic analysis method was used to obtain the factors affecting the stability of DC microgrid system，and a DC bus was proposed.For the dynamic droop control strategy of voltage and output power，the simulation model of the DC bus coordinated control strategy under different working conditions was constructed on the MATLAB/Simulink modeling simulation platform and the simulation test was carried out.The simulation results showed that the adopted control optimization strategy greatly the quality of the busbar voltage of the DC microgrid power supply system and the coordination and stability of the system were improved.