基于电动汽车充放电特性的交直流微网控制策略

AC/DC Micro-grid Control Strategy Based on Charge/Discharge Characteristics of Electric Vehicles

微电网内功率波动会对微电网系统的安全稳定运行产生巨大影响。在交直流微电网中,为了充分利用分布式能源发电,结合电动汽车充放电特性,维持系统内功率平衡,提出了基于电动汽车充放电特性的交直流微网频率控制策略。通过模拟包括风力发电、光伏和柴油发电机等分布式电源的功率出力,调节微电网中电动汽车充放电频率,来平衡微电网负载。仿真给出了在一天的时间内调节含电动汽车的微电网上频率系统,改善了微电网的供电质量。仿真结果验证了系统的有效性。

Power fluctuation in the micro-grid has a great impact on the safe stable operation of micro-grid systems.In order to make full use of distributed energy generation in the AC/DC micro-grid,considering charge/discharge characteristics of electric vehicles as well as maintenance of power balance in the system,a frequency control strategy was proposed for the AC/DC micro-grid on the basis of charge/discharge characteristics of electric vehicles.Through simulation of power output of distributed power sources including wind power,photovoltaic generation and diesel generators,the charge/discharge frequencies of electric vehicles in the micro-grid were adjusted to balance the load of the micro-grid.Through simulation,a system was given for adjustment of frequencies on the micro-grid containing electric vehicles in one day,thus improving the power quality of the micro-grid.Simulation results verified the effectiveness of the proposed system.