Integrating model-driven and data-driven methods for under-frequency load shedding control

IF 3.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Electric Power Systems Research Pub Date : 2024-10-15 DOI:10.1016/j.epsr.2024.111103

Binghui Li , Huaiyuan Wang , Jian Li , Guoqiang Lu

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Abstract

With the access of a high percentage of new energy sources, power system frequency stability is challenged. Under-frequency load shedding (UFLS) is one of the primary measures to maintain frequency stability. Due to the mismatch between the amount of load shed by the traditional UFLS methods and the actual active power deficit, a new UFLS method needs to be designed. An approach utilizing a deep deterministic policy gradient (DDPG) algorithm for the problem is proposed. First, the DDPG algorithm is modified to adapt to the UFLS problem. Then, the idea of model-driven is introduced to improve the validity of the model. Thus, a novel UFLS method is proposed, which integrates data-driven and model-driven ideas. Furthermore, a structure called the dual experience pool is designed to accelerate training speed and improve stability. Based on the proposed method, a UFLS control framework is designed. Finally, the suggested methodology is validated using the IEEE-39 bus system and the Fujian power grid as test cases.

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整合模型驱动和数据驱动方法，实现欠频甩负荷控制

随着大量新能源的接入，电力系统的频率稳定性面临挑战。欠频甩负荷（UFLS）是维持频率稳定的主要措施之一。由于传统 UFLS 方法的甩负荷量与实际有功功率缺口不匹配，因此需要设计一种新的 UFLS 方法。本文提出了一种利用深度确定性策略梯度（DDPG）算法解决该问题的方法。首先，对 DDPG 算法进行修改，以适应 UFLS 问题。然后，引入模型驱动的思想来提高模型的有效性。因此，我们提出了一种融合了数据驱动和模型驱动思想的新型 UFLS 方法。此外，还设计了一种名为双经验池的结构，以加快训练速度并提高稳定性。根据提出的方法，设计了一个 UFLS 控制框架。最后，以 IEEE-39 总线系统和福建电网为测试案例，对所提出的方法进行了验证。

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来源期刊

Electric Power Systems Research 工程技术-工程：电子与电气

CiteScore

7.50

自引率

17.90%

发文量

963

审稿时长

3.8 months

期刊介绍： Electric Power Systems Research is an international medium for the publication of original papers concerned with the generation, transmission, distribution and utilization of electrical energy. The journal aims at presenting important results of work in this field, whether in the form of applied research, development of new procedures or components, orginal application of existing knowledge or new designapproaches. The scope of Electric Power Systems Research is broad, encompassing all aspects of electric power systems. The following list of topics is not intended to be exhaustive, but rather to indicate topics that fall within the journal purview. • Generation techniques ranging from advances in conventional electromechanical methods, through nuclear power generation, to renewable energy generation. • Transmission, spanning the broad area from UHV (ac and dc) to network operation and protection, line routing and design. • Substation work: equipment design, protection and control systems. • Distribution techniques, equipment development, and smart grids. • The utilization area from energy efficiency to distributed load levelling techniques. • Systems studies including control techniques, planning, optimization methods, stability, security assessment and insulation coordination.