计及源/荷双重波动的光储微网孤岛稳定控制

Stability Control of PV-storage Microgrid Island With Dual Source/Load Fluctuations

根据微网系统运行特点,分析了微网系统中分布式发电单元和储能单元孤岛运行条件下的控制策略。为保证分布式电源出力和负荷波动时微网系统中能量供需平衡及其快速动态响应特性,提出了一种分布式发电单元和蓄电池储能单元间的协同控制能量管理策略,选取光伏发电单元的直流母线电压作为储能单元切换开关和充电放电电流参考信号标量。为验证此处所提算法,分别搭建了包括光伏发电单元和储能单元的仿真模型和实验平台,2台2kVA光伏发电单元采用对等控制作为主分布式单元,蓄电池储能单元采用PQ控制作为从发电单元,仿真和实验结果共同验证了此处所提算法的有效性和正确性。

According to the operational characteristics of microgrid systems,the control strategies under islanded operation conditions of distributed generation units and energy storage units in microgrid systems are analyzed.To ensure energy supply and demand balance and fast dynamic response characteristics in microgrid systems during distributed power generation output and load fluctuations,a collaborative control energy management strategy between distributed generation units and battery energy storage units is proposed.The DC bus voltage of the PV power generation unit is selected as a scalar for the switching switch of the energy storage unit and charging and discharging curent reference signal.To verify the proposed algorithm,simulation models and experimental platforms are built separately including PV power generation units and energy storage units.Two 2 kVA PV power generation units adopt peer-to-peer control as the master distributed unit,the battery energy storage unit adopts PQ control as the slave power generation unit.The simulation and experimental results verify the effectiveness and correctness of the proposed algorithm.