基于分层能量管理的直流微电网控制策略研究

Research on Control Strategy of DC Micro-grid Based on Hierarchical Energy Management

现代社会的发展对供电系统的要求越来越高。由于可再生能源的兴起,大量的分布式发电单元将并入电网中,给电网的安全运行带来不利影响。微电网技术消除了这种影响,而直流微电网则更加适合分布式电源的接入。本文在研究了直流微电网的下垂控制以及电压恢复控制策略的基础上,采用能量分层法对微电网的组网运行控制。并指出蓄电池组在直流微电网组网运行过程中的重要性。最后通过仿真验证该控制策略的有效性。

As the development of modern society has more requirements on the power supply system. And due to the rise of renewable energy, a large number of distributed power generation units will be connected into the grid, which may give a great impact on the operation of the grid. Micro-grid technology may eliminates the impact, And the DC micro-grid is more suitable for distributed power generation access. Based on the research of droop control and voltage recovery control strategy of DC micro- grid, this paper adopts energy stratification method to control the operation of micro-grid. And pointed out the importance of the battery pack in the operation of the DC micro-grid. Finally through simulation Verify the validity of the control strategy.