基于DC/DC变换器的储能电站锂电池快速均衡策略

A quick equalization strategy for lithium battery in energy storage power station based on DC/DC converter

随着新能源发电的快速发展和大规模并网运行,储能电站的应用越来越多。其中,锂电池储能电站配置的比例在逐年增加,但是,构成储能电站的大量单体电池之间不可避免的会存在差异,这种差异会随着时间的推移而加剧,最终严重影响储能电站的运行效果。为此,提出一种适用于大规模储能电站的基于DC/DC变换器的储能电站锂电池快速均衡策略,可以快速均衡目标电池组,并通过实验对快速均衡策略进行了实验验证,实验结果表明,提出的快速均衡策略是有效的,可以用于大型储能电站的快速均衡控制。

With the rapid development of new energy power generation and large-scale grid-connected operation, the application of energy storage power stations is increasing. Among these energy storage power stations, the proportion of lithium battery energy storage power station configuration is increasing year by year. Inevitably, however, there will be differences between the large number of individual batteries that make up a storage plant. This difference will aggravate with the passage of time and finally seriously affect the operation effect of energy storage power station. Therefore, this paper proposes a quick equalization strategy of lithium battery in energy storage power station based on DC/DC converter, which is suitable for large-scale energy storage power station and can quickly balance the target battery pack. The fast balancing strategy is verified by experiments. The experimental results show that the fast equalization strategy proposed in this paper is effective and can be applied to the fast equalization control of large energy storage power stations.