摘要：Nowadays, distributed generation technology is of great help to the efficient utilization of newenergy. If the distributed power supply is connected to the DC micro-grid, it will be more secure and reliable.Therefore, it is necessary to control the voltage stability of the DC bus and ensure the balance of the sourcecharge power of system to ensure the power supply quality and safety of the DC micro-grid. There are twooperation modes of DC micro-grid: connected operation and isolated operation, and isolated operationcontrol is the foundation and key of system-level control of DC micro-grid. To solve the problem of busvoltage fluctuation in isolated de micro-grid, this study proposes a voltage hierarchical-droop controlstrategy for DC micro-grid, which can effectively improve the stability of the DC bus voltage. Last, thisstudy builds the simulation model of DC micro-grid in the MATLAB/Simulink platform to verify thevalidity and feasibility of the proposed control strat.
其他摘要：Nowadays, distributed generation technology is of great help to the efficient utilization of new energy. If the distributed power supply is connected to the DC micro-grid, it will be more secure and reliable. Therefore, it is necessary to control the voltage stability of the DC bus and ensure the balance of the source charge power of system to ensure the power supply quality and safety of the DC micro-grid. There are two operation modes of DC micro-grid: connected operation and isolated operation, and isolated operation control is the foundation and key of system-level control of DC micro-grid. To solve the problem of bus voltage fluctuation in isolated dc micro-grid, this study proposes a voltage hierarchical-droop control strategy for DC micro-grid, which can effectively improve the stability of the DC bus voltage. Last, this study builds the simulation model of DC micro-grid in the MATLAB/Simulink platform to verify the validity and feasibility of the proposed control strategy.
