摘要
针对光柴混合发电的孤岛微电网,提出基于滑模控制和超级电容调节的频率控制方法。首先,建立光伏系统、超级电容和柴油发电机系统的数学模型;其次,设计滑模控制器来调节柴油机发电机的有功输出功率,减小由于光伏输出功率波动和微网中不断变化的负荷而产生的频率偏差;最后增加超级电容储能设备控制微网的频率偏差。仿真结果表明,与传统的柴油发电机速度控制策略相比,提出的方法不仅实现了光伏系统的最大输出功率控制,而且有效的减少了孤岛微网的频率偏差。
According to the PV-diesel hybrid isolated microgrid, a frequency control method is proposed based on the sliding mode con- trol and the super-capacitor. Firstly, the mathematics model of PV system, super-capacitor system and the diesel generator system are constructed separately. Secondly, the sliding mode controller is designed to adjust the diesel generator system output power, which can reduce the frequency deviation caused by the PV output power fluctuation and the variable load. Lastly, the super-capacitor is added to the mierogrid to control the frequency deviation. The simulation results show the proposed method in this paper can not only realize the maximum output power control for the PV system, but also reduce the frequency deviation in the isolated microgrid compared with the traditional diesel speed control.
出处
《控制工程》
CSCD
北大核心
2014年第1期103-106,共4页
Control Engineering of China
基金
上海市教委重点学科建设项目(J51303)
上海市自然科学基金项目(09ZR1413200)
关键词
光伏系统
超级电容
频率控制
滑模控制
PV system
super-capacitor
frequency control
sliding mode control
