基于优化功率分配的光伏混合储能系统能量管理策略

目的]针对舰船移动平台光伏系统的输出功率不稳定问题和负载突加/突卸所导致的功率波动问题,提出基于优化功率分配的光伏混合储能系统能量管理策略。方法]针对传统限值管理方法的不足,根据超级电容荷电状态所在的不同分区自适应调整滤波时间常数,从而实现混合储能系统功率的优化分配,同时分析各个变换器的控制策略和工作模式。结果]Matlab仿真结果和工程测试结果表明:该能量管理方案和变换器控制策略可以有效地改善混合储能系统的过充或过放问题,不仅可以保证直流母线电压的稳定性,还可以提高系统的动态响应性和协调性。结论]研究成果可为移动平台光伏系统的能量管理提供参考。

Energy management strategy of photovoltaic hybrid energy storage system based on optimal power distribution

Objectives]To address the unstable power output of photovoltaic systems on the mobile platforms of ships and power fluctuations caused by surge loading/unloading,an energy management strategy involving a photovoltaic hybrid energy storage system based on optimal power distribution is proposed.Methods]In view of the shortcomings of the traditional limit management method,the filter time constant is adaptively adjusted according to the different zones of the charged state of the supercapacitor,thereby realizing the optimal power distribution of the hybrid energy storage system.Meanwhile,the control strategy and working mode of each converter are analyzed.Results]The Matlab simulation results and engineering test results show that the energy management scheme and converter control strategy can effectively improve the overcharge or over-discharge problem of hybrid energy storage systems,not only ensuring the stability of the DC bus voltage,but also improving the dynamic response and coordination of the system.Conclusions]The results of this study can provide references for the energy management of photovoltaic systems on mobile platforms.