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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。
For the island micro-grid hybrid light-fired power generation, proposed based on sliding mode control and supercapacitor frequency control method. Firstly, the mathematical model of PV system, supercapacitor and diesel generator system is established. Secondly, the sliding mode controller is designed to adjust the active output power of diesel generator to reduce the fluctuation of photovoltaic output power and the changing load in the microgrid. Resulting frequency deviation; Finally, increase the supercapacitor energy storage device to control the frequency deviation of the micro-grid. The simulation results show that compared with the traditional diesel generator speed control strategy, the proposed method not only realizes the maximum output power control of the PV system, but also effectively reduces the frequency deviation of the island micro-grid.