基于数据驱动与时域仿真融合的电力系统暂态稳定快速评估  

Rapid Evaluation of Power System Transient Stability Based on Fusion of Data-driven and Time-domain Simulation

作　　者：李永康 刘宝柱[1] 胡俊杰 LI Yongkang;LIU Baozhu;HU Junjie(School of Electrical and Electronic Engineering,North China Electric Power University,Changping District,Beijing 102206,China)

机构地区：[1]华北电力大学电气与电子工程学院,北京市昌平区102206

出　　处：《电网技术》2023年第11期4386-4395,共10页Power System Technology

基　　金：国家自然科学基金项目(52177080)。

摘　　要：随着大规模可再生能源以及交直流混合电力系统的快速发展,具备电力电子特性的元件在电力系统中的占比快速提升,电力系统中的电力电子特性日趋明显。该文针对电力电子化电力系统暂态稳定评估时采用时域仿真方法计算速度慢的问题,提出一种基于数据驱动与时域仿真融合的暂态稳定快速评估方法。该方法从时域仿真法的计算过程入手,建立物理驱动模型与数据驱动模型混合驱动的暂态稳定并行评估框架,采用知识增强的数据驱动模型取代电力电子元件中的微分方程组,从而加快时域仿真计算速度。并在此基础上根据所提跨步欧拉法对数据进行预处理,实现数据驱动模型的跨步预测,将电力电子元件的小步长整合为与同步发电机一致的大步长,进一步加快仿真速度。该文采用改进的IEEE14节点模型对所提算法和模型进行验证,结果表明所提方法在提高仿真速度的同时能够保持较高的准确度。With the rapid development of the large-scale renewable energy and the AC/DC hybrid power systems,the proportion of components with power electronic characteristics in the power system has increased rapidly so that the power electronic characteristics in the power system becomes increasingly obvious.Aiming at the slow calculation speed of the time-domain simulation in the transient stability assessment of the power electronic power system,this paper proposes a fast transient stability assessment based on the fusion of data-driven and time-domain simulation.Starting with the calculation process of the time domain simulation,this method establishes a parallel evaluation framework of transient stability driven by the hybrid-driven model composed of a physics-driven model and a data-driven model,and uses the knowledge-enhanced data-driven model to replace the differential equations in the power electronic components to speed up the time domain simulation calculations.On this basis,the data is preprocessed according to the Stride Euler method proposed in this paper to realize the stride prediction of the data-driven model,changing the small step size of the power electronic components to a large step size consistent with the synchronous generator to further speed up the simulation.In this paper,the improved IEEE14 node model is used to verify the proposed algorithm and model.The results show that the proposed method is able to maintain a high accuracy while improving the simulation speed.

关 键 词：暂态稳定分析 数据驱动 电力电子元件 时域仿真法 跨步欧拉法 

分 类 号：TM712[电气工程—电力系统及自动化]