Distributed energy management for underground engineering microgrid with reliable power supply

IF 1.6 Q4 ENERGY & FUELS IET Energy Systems Integration Pub Date : 2023-02-13 DOI:10.1049/esi2.12093
Hongda Wang, Zhipeng Jiao, Jianchun Xing, Qiliang Yang, Man Yang, Yutao Zhou, Jiubing Zhao
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Abstract

Battery energy storage system (BESS) is of great significance to ensure underground engineering (UE) microgrid to have reliable power supply. Distributed energy management is one of the solutions that can enhance the microgrid reliability by efficiently scheduling the distributed appliances (such as diesel generator, BESS) to accommodate various scenarios. A distributed energy management model is proposed, which can help in reliable power supply by prolonging the lifetime of BESS and reducing the load loss. Considering the different energy consumption needs and dispatching capabilities of three regions of the UE microgrid, the proposed energy management model distributed dispatches the three regions in UE microgrid. In addition, considering the relationship between the depth of discharge and lifetime, the proposed energy management model also contains the BESS lifetime extension model constructed with dynamic charge-discharge rate and dynamic bidirectional AC/DC converter efficiency. Based on the deterministic optimisation method, the optimal solution of the proposed energy management model is obtained. The effectiveness of the proposed energy management model is validated under six scenarios (that is grid connected mode, off grid mode, partial interconnection mode, interconnection mode, and independent modes with and without power exchange). The simulation results demonstrate that compared with the conventional model, the proposed model can reduce the operation cost by 6.46% and the load loss rate by 0.747%, which helps to improve the reliability of UE microgrid.

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可靠供电的地下工程微电网分布式能源管理
电池储能系统(BESS)对于保证地下工程微电网的可靠供电具有重要意义。分布式能源管理是提高微电网可靠性的解决方案之一,它可以有效地调度分布式设备(如柴油发电机、BESS)以适应各种场景。提出了一种分布式能量管理模型,通过延长BESS的使用寿命和降低负载损耗,实现了BESS的可靠供电。考虑到UE微网三个区域不同的能耗需求和调度能力,提出的能量管理模型对UE微网三个区域进行分布式调度。此外,考虑到放电深度与寿命之间的关系,所提出的能量管理模型还包含了基于动态充放电速率和动态双向AC/DC变换器效率构建的BESS寿命扩展模型。基于确定性优化方法,得到了该能源管理模型的最优解。在并网模式、离网模式、部分并网模式、并网模式和有无电力交换的独立模式6种场景下,验证了所提出的能源管理模型的有效性。仿真结果表明,与传统模型相比,该模型可降低6.46%的运行成本和0.747%的负荷损失率,有助于提高UE微网的可靠性。
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来源期刊
IET Energy Systems Integration
IET Energy Systems Integration Engineering-Engineering (miscellaneous)
CiteScore
5.90
自引率
8.30%
发文量
29
审稿时长
11 weeks
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