Equivalent modeling method of battery energy storage system in multi-time scales
Equivalent modeling method of battery energy storage system in multi-time scales
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DOI：
10.1109/ipemc.2016.7512294
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发表时间：
2016-05
期刊：
影响因子：
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通讯作者：
Bingyu Sang;Jinhang Hu;Guanjun Li;J. Xue;Ye Jilei
中科院分区：
文献类型：
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作者：
Bingyu Sang;Jinhang Hu;Guanjun Li;J. Xue;Ye Jilei
蓄电池储能技术的快速发展为大规模可再生能源发电的一体化提供了新的解决方案，但多时间尺度下的蓄电池储能系统(BESS)的精确模型尚未建立。BESS模型由电池模型、电力电子接口模型和控制器模型组成。电池模型的参数目前还没有一个确定的数学表达式，电力电子模型和控制器在不同的应用中也是不同的。考虑到在电力系统中的不同应用，应建立多时间尺度的BESS模型，以考虑暂态、稳态和动态。本文提出了一种贝斯的等效建模方法。首先，总结了蓄电池不同的等效电路模型，通过比较，认为戴维南等效电路模型是适合电力系统应用的有效模型。因此，考虑到电流、内阻、荷电状态等参数之间的关系，根据实验数据对电池参数进行了拟合。然后，介绍了包括DC/AC和DC/DC转换器在内的电力电子接口模型，并提出了不同运行方式下的控制方法。最后，在Bess实验平台上建立了Bess模型并进行了验证。结果表明，该模型能较好地反映蓄电池的多状态特性，响应速度快。
The rapid development of battery energy storage technology has provided a new solution for integrating large scale renewable power generation; however, the accurate model of battery energy storage system (BESS) in multi-time scales has not been developed yet. The BESS model consists of battery model, power electronics interface model and controller model. There are still no certain math expressions about the parameters of battery model, the model of power electronics and controller are also different in different applications. Considering different applications in power system, the multi-time scales model of BESS should be established to take account of the transient, steady and dynamic state. In this paper, an equivalent modeling method of BESS was developed. First, the different equivalent circuit models of battery were summarized, according to the comparison, the thevenin equivalent circuit model was supposed as the effective model for power system application. So, taking into account the relations between the parameters such as current, internal resistance, and state of charge (SOC), the battery parameters were fitted based on experimental date. Then, the power electronics interface model including DC/AC and DC/DC converter were introduced, and the control method with different operations were proposed. Finally, the BESS model were built and verified on the platform of BESS experiment. The results show that the model can represent the multi-state characteristics of battery and has quick response.