孤岛模式下微电网多DGs并联运行控制方法

Multi DGs parallel operation control method for microgrid under island mode

为了解决分布式发电系统影响传统电网的电压控制和电能质量的问题,提出了一种孤岛模式下微电网多DGs并联运行控制方法.深入分析了微电网孤岛运行的并网控制机理,在并网运行和孤岛运行以及微电网从并网模式切换孤岛模式时,微电网智能稳定运行问题.在每个分布式发电系统中,设计控制方法,利用电压电流内环控制用于调节三相网侧逆变器,功率外环控制用于在微电网孤岛运行时,并联多个DGs之间分配功率.使用PSIM软件进行仿真,结果表明这种控制方法在微电网并网运行、孤岛运行都是有效的.

In order to solve the problem that distributed generation system affects the voltage control and power quality of traditional power grid, a multi-DGs parallel operation control method for micro-grid under island mode is proposed. The grid-connected control mechanism of isolated operation of micro-grid and the intelligent and stable operation of micro-grid are analyzed in depth during the grid-connected operation and island operation and the micro-grid switching from grid-connected mode to island mode. In each distributed generation system, the voltage and current inner loop control is used to regulate the three-phase grid-side inverter, and the power outer loop control is used to distribute power among multiple DGs in parallel when the micro-grid islands are running. Simulation results using PSIM software show that the control method is effective in grid-connected operation and island operation of micro-grid.