构网型光储混合供电系统及其协调控制策略

A Grid Forming Photovoltaic Storage Hybrid Power Supply System and Its Coordination Control Strategy

提出并研究了一种用于独立构网的光储混合供电系统及其不同介质储能的协调控制方法。独立构网型光储混合供电系统由光伏发电回路、蓄电池充放电回路、超级电容器充放电回路共同组成,光伏发电回路为负载提供能量,多余或不足的能量由蓄电池和超级电容器进行动态调节。分析并给出了构网型光储混合供电系统能量管理核心控制算法,使得系统可根据光伏电池和蓄电池的工作状态,自动控制光伏逆变器和储能双向变换器工作模式,确保光伏阵列和蓄电池、超级电容器协调工作,实现独立供电系统高效稳定运行及快速的动态响应。最后通过系统仿真和样机实验验证了混合系统协调控制方法及系统能量管理控制策略的有效性。

A grid forming photovoltaic storage hybrid power supply system and its coordinated control method for energy storage in different media are proposed and studied.The independent grid forming photovoltaic storage hybrid power supply system is composed of photovoltaic power generation cicuit,battery charge and discharge circuit and supercapacitor charging and discharging circuit.The photovoltaic power generation circuit provides energy for the load,and the excess or insufficient energy is dynamically adjusted by the battery and supercapacitor.The core control algorithm of energy management of grid forming photovoltaic storage hybrid power supply system is analyzed and given,so that the system can automatically control the working mode of photovoltaic inverter and energy storage bidirectional converter according to the working state of photovoltaic cells and batteries,ensure the coordinated work of photovoltaic array,battery and supercapacitor,and realize the efficient and stable operation and fast dynamic response of independent power supply system.Finally,the effectiveness of the hybrid system coordinated control method and system energy management control strategy are verified by system simulation and prototype experiment.