基于混合储能系统跟踪光伏发电输出功率的控制策略  

Control Strategy for Tracking the Output Power of Photovoltaic Power Generation Based on Hybrid Energy Storage System

作　　者：田春光[1] 田利[1] 李德鑫[1] 吕项羽[1] 常学飞[1] 

机构地区：[1]国网吉林省电力有限公司电力科学研究院,长春130021

出　　处：《电工技术学报》2016年第14期75-83,共9页Transactions of China Electrotechnical Society

摘　　要：混合储能系统兼备能量型储能和功率型储能的技术特性,可以有效缩减光伏功率的预测误差,提高将光伏预测出力作为电力调度参考的可靠性。为此,提出了混合储能系统提升光伏电站跟踪目标出力能力的优化控制策略。该策略采用内部能量协调控制和多目标优化控制的复合控制方式,合理地分配了电池与超级电容器的充放电功率,控制混合系统的出力弥补光伏电站预测功率和实际功率的偏差。通过国内某40MW光伏电站250天输出功率数据进行仿真分析,表明该策略不仅可以有效跟踪光伏的预测出力,而且能够充分发挥不同储能介质的特性,降低电池的充放电深度,使混合储能得到更好的应用。Hybrid energy storage system has the technical characteristics of both energy storage and power storage. It can effectively reduce the photovoltaic power prediction error, hence improve the reliability where PV forecast output is used as the reference of the power dispatch. Therefore, this paper proposes an optimal control strategy for hybrid energy storage system to improve the capacity of photovoltaic output tracking the target output power. This strategy uses the compound control method to control the internal energy coordination control and the multi-objective optimization control. It can reasonably distribute the charge and discharge power of battery and super capacitor, and control the output of the hybrid system to make up for the deviations between the predicted power and the actual power. By analyzing the data of 250 days output power from a domestic 40MW photovoltaic power station, it is shown that this strategy can not only effectively trace the predicted output power of PV, but also make full use of the characteristics of different storage mediums. It reduces the charge and discharge depths of the battery, and consequently the hybrid storage can be better applied.

关 键 词：混合储能系统 锂电池 超级电容器 发电出力跟踪 复合控制策略 

分 类 号：TM715[电气工程—电力系统及自动化]