Independent Microgrid Transient Stability Evaluation Model Based on a Message Passing Graph Neural Network

IF 2.9 4区 工程技术 Q3 ENERGY & FUELS
Yuntao Ju, Ziyi Li
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引用次数: 0

Abstract

In isolated microgrids, virtual synchronous generators (VSGs) are utilized to enhance frequency stability. However, the presence of these generators can lead to undesirable levels of voltage or current during transient angle instability. The current Lyapunov transient stability analysis method is challenging to utilize due to the complexity of acquiring the energy function. Furthermore, existing data-driven microgrid transient stability methods do not easily adapt to changes in topology. Inaccuracies may also be present in existing stability analysis methods, as they fail to account for nonlinearities such as saturation and dead zone. To address these issues, we propose a microgrid transient stability analysis method based on a message-passing graph neural network (MPNN). When the topology changes, the information bus and transmission line are aggregated and updated through the message-passing mechanism in the graph neural network, and we enhance the approach by introducing current saturation as an additional feature to the transient stability analysis model. We present simulation results for a microgrid test case to validate the effectiveness of the proposed method, and the evaluation accuracy is maintained above 98%.

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基于消息传递图神经网络的独立微电网暂态稳定评估模型
在隔离型微电网中,采用虚拟同步发电机(VSGs)来提高频率稳定性。然而,在瞬态角度不稳定期间,这些发电机的存在会导致不希望的电压或电流水平。目前的李雅普诺夫暂态稳定分析方法由于能量函数的获取复杂性而具有挑战性。此外,现有的数据驱动微电网暂态稳定方法不容易适应拓扑结构的变化。现有的稳定性分析方法也可能存在不准确性,因为它们不能考虑非线性,如饱和和死区。为了解决这些问题,我们提出了一种基于消息传递图神经网络(MPNN)的微电网暂态稳定性分析方法。当拓扑结构发生变化时,通过图神经网络中的消息传递机制对信息总线和传输线进行聚合和更新,并在暂态稳定分析模型中引入电流饱和作为附加特征,对该方法进行了改进。通过微网实例仿真验证了该方法的有效性,评估准确率保持在98%以上。
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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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