A Two-Stage Hierarchical Energy Management System for Interconnected Microgrids Using ELM and GA

IF 2.9 4区 工程技术 Q3 ENERGY & FUELS
Negar Dehghani Mahmoudabadi, Mehran Khalaj, Davood Jafari, Ali Taghizadeh Herat, Parisa Mousavi Ahranjani
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Abstract

This paper presents a novel hierarchical two-layer energy management system for grid-connected microgrids in the presence of uncertainty. In the first stage, each microgrid separately optimises its own local scheduling with a combination of renewable and dispatchable energy resources. In the second stage, the energy trading among the microgrids is facilitated by a DSO through the application of a Genetic Algorithm (GA) for optimising overall operational costs and system flexibility. In order to tackle the natural variability of the renewable energy resources, an extreme learning machine (ELM) is used to generate probabilistic wind and solar power generation forecasts. The optimisation problem is formulated as a mixed integer nonlinear programming (MINLP) model with continuous and binary decision variables. A 30-day case study of three interconnected microgrids under normal and contingency scenarios is tested using this proposed framework. Simulation results display significant improvements in load shedding reduction, scheduling efficiency, and system flexibility. Also, the modularity of the framework enables scaling and integration of vehicle-to-grid (V2G) technologies, making it a suitable solution for real-world smart grid deployment.

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基于ELM和遗传算法的互联微电网两阶段分层能量管理系统
针对存在不确定性的并网微电网,提出了一种新的分层两层能量管理系统。在第一阶段,每个微电网分别通过可再生能源和可调度能源的组合来优化自己的局部调度。在第二阶段,DSO通过应用遗传算法(GA)来优化整体运营成本和系统灵活性,从而促进微电网之间的能源交易。为了解决可再生能源的自然变异性,使用极限学习机(ELM)对风能和太阳能发电进行概率预测。将优化问题表述为具有连续和二元决策变量的混合整数非线性规划(MINLP)模型。使用该框架对正常和应急情景下的三个互联微电网进行了为期30天的案例研究。仿真结果显示在减载、调度效率和系统灵活性方面有显著的改进。此外,该框架的模块化支持车辆到电网(V2G)技术的扩展和集成,使其成为现实世界智能电网部署的合适解决方案。
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来源期刊
IET Renewable Power Generation
IET Renewable Power Generation 工程技术-工程:电子与电气
CiteScore
6.80
自引率
11.50%
发文量
268
审稿时长
6.6 months
期刊介绍: IET Renewable Power Generation (RPG) brings together the topics of renewable energy technology, power generation and systems integration, with techno-economic issues. All renewable energy generation technologies are within the scope of the journal. Specific technology areas covered by the journal include: Wind power technology and systems Photovoltaics Solar thermal power generation Geothermal energy Fuel cells Wave power Marine current energy Biomass conversion and power generation What differentiates RPG from technology specific journals is a concern with power generation and how the characteristics of the different renewable sources affect electrical power conversion, including power electronic design, integration in to power systems, and techno-economic issues. Other technologies that have a direct role in sustainable power generation such as fuel cells and energy storage are also covered, as are system control approaches such as demand side management, which facilitate the integration of renewable sources into power systems, both large and small. The journal provides a forum for the presentation of new research, development and applications of renewable power generation. Demonstrations and experimentally based research are particularly valued, and modelling studies should as far as possible be validated so as to give confidence that the models are representative of real-world behavior. Research that explores issues where the characteristics of the renewable energy source and their control impact on the power conversion is welcome. Papers covering the wider areas of power system control and operation, including scheduling and protection that are central to the challenge of renewable power integration are particularly encouraged. The journal is technology focused covering design, demonstration, modelling and analysis, but papers covering techno-economic issues are also of interest. Papers presenting new modelling and theory are welcome but this must be relevant to real power systems and power generation. Most papers are expected to include significant novelty of approach or application that has general applicability, and where appropriate include experimental results. Critical reviews of relevant topics are also invited and these would be expected to be comprehensive and fully referenced. Current Special Issue. Call for papers: Power Quality and Protection in Renewable Energy Systems and Microgrids - https://digital-library.theiet.org/files/IET_RPG_CFP_PQPRESM.pdf Energy and Rail/Road Transportation Integrated Development - https://digital-library.theiet.org/files/IET_RPG_CFP_ERTID.pdf
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