A Data-Driven Adaptive Control Approach for Enhancing the Dynamic Response of VSGs in Varying Grid Conditions

IF 3.8 2区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Power Delivery Pub Date : 2025-04-07 DOI:10.1109/TPWRD.2025.3557059

Shah Fahad;Buxin She;Junjie Yin;Fangxing Li;Hantao Cui;Rui Bo

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Abstract

Conventionally, a virtual synchronous generator (VSG) is designed for islanded mode (IM) operation to meet specific operational requirements such as the rate of change of frequency (RoCoF). However, the operation of VSG designed for IM may not meet the operational and control criteria in grid connected mode (GCM) when the grid conditions vary. In addition, conventional VSG control technology does not consider the influence of the presynchronization scheme when connected to a weak grid, which degrades the RoCoF in IM. To overcome the aforementioned challenges, the proposed study presents a twin-delayed deep deterministic policy gradient (TD3) algorithm to improve the seamless transition performance of VSG from IM to GCM and vice versa. In the first step, the VSG-based power system model is used as a foundation for problem formulation of the proposed TD3 algorithm. Secondly, a reward function is designed according to the performance requirements, i.e., frequency and RoCoF requirements, of the VSG in order to guide the training of the agent in varying load, power reference, and grid conditions. Finally, the superiority of the proposed algorithm over existing methods is validated in MATLAB/SIMULINK and RTDS based real-time simulation environment.

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一种数据驱动的自适应控制方法增强变网格条件下vgs的动态响应

传统上，虚拟同步发电机（VSG）被设计为孤岛模式（IM）运行，以满足特定的运行要求，如频率变化率（RoCoF）。然而，当电网条件发生变化时，为IM设计的VSG的运行可能无法满足并网模式下的运行和控制标准。此外，传统的VSG控制技术没有考虑连接弱电网时预同步方案的影响，从而降低了IM中的RoCoF。为了克服上述挑战，本研究提出了一种双延迟深度确定性策略梯度（TD3）算法，以提高VSG从IM到GCM的无缝转换性能。第一步，将基于vsg的电力系统模型作为TD3算法问题表述的基础。其次，根据VSG的性能要求，即频率和RoCoF要求，设计奖励函数，指导智能体在不同负载、功率参考和电网条件下的训练。最后，在基于MATLAB/SIMULINK和RTDS的实时仿真环境中验证了所提算法相对于现有方法的优越性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Transactions on Power Delivery 工程技术-工程：电子与电气

CiteScore

9.00

自引率

13.60%

发文量

513

审稿时长

6 months

期刊介绍： The scope of the Society embraces planning, research, development, design, application, construction, installation and operation of apparatus, equipment, structures, materials and systems for the safe, reliable and economic generation, transmission, distribution, conversion, measurement and control of electric energy. It includes the developing of engineering standards, the providing of information and instruction to the public and to legislators, as well as technical scientific, literary, educational and other activities that contribute to the electric power discipline or utilize the techniques or products within this discipline.