大规模电力系统仿真用新能源场站模型结构及建模方法研究(三):电磁暂态模型  

Research on Model Structures and Modeling Methods of Renewable Energy Stations for Large-scale Power System Simulation(III):Electromagnetic Transient Models

作　　者：周佩朋 孙华东 项祖涛 郭剑波 刘明松 张健 ZHOU Peipeng;SUN Huadong;XIANG Zutao;GUO Jianbo;LIU Mingsong;ZHANG Jian(State Key Laboratory of Power Grid Safety and Energy Conservation(China Electric Power Research Institute),Haidian District,Beijing 100192,China;National Power Dispatching and Control Center,Xicheng District,Beijing 100031,China)

机构地区：[1]电网安全与节能国家重点实验室(中国电力科学研究院有限公司),北京市海淀区100192 [2]国家电力调度控制中心,北京市西城区100031

出　　处：《中国电机工程学报》2023年第8期2990-2999,共10页Proceedings of the CSEE

基　　金：国家自然科学基金集成项目“高比例新能源场景下交直流混联电网的暂态稳定分析理论及控制方法”(U2166601)。

摘　　要：在对含新能源接入的电力系统进行仿真分析时,往往需对新能源场站进行等值建模,其中电磁暂态模型的应用场景可分为大扰动和小扰动2类电网问题,目前在适用于2类场景的等值建模方面缺乏系统性论述。该文以风电场作为重点研究对象,首先在阐述大扰动的等值原则和方法的基础上,从理论上分析功率水平对直驱风机(direct drive permanent magnet synchronous generator,PMSG)、光伏(photovoltaic,PV)和双馈风机(doubly fed induction generator,DFIG)频域阻抗特性的影响,从而明确按风速/光照度、功率或风机转速进行等值的合理性。其次,从多频段稳定问题需求出发,研究汇流线路阻抗及机组扩容方式对等值精度的影响;在此基础上,总结兼顾大扰动和小扰动场景的值建模方法,提出1~4机新能源场站模型结构,分析等值机台数对于等值精度的影响。最后,针对不同扰动场景进行时域仿真分析,验证所提等值建模方法的有效性。When performing simulation analysis on power systems with renewable energy access,equivalent modeling of renewable energy stations is necessary.Electromagnetic transient models are commonly used in two scenarios containing large and small disturbance on power grids.In existing studies,a systematic discussion on the adaptability of equivalent models for both scenarios is insufficient.In this paper,based on the principle and method of equivalence of large disturbances,the influence of active power on the frequency domain impedance of direct drive permanent magnet synchronous generator(PMSG),photovoltaic(PV)and doubly fed induction generators(DFIG)is firstly analyzed,so as to clarify the reasonableness of equivalence based on wind speed,illuminance,power or turbine rotor speed.Secondly,for the needs of analyzing multi-frequency-band stability,the influence of the bus-line impedance and the expansion method of the turbines on the equivalent accuracy are studied.On this basis,equivalent modeling methods considering both large and small disturbance scenarios are summarized.The equivalent model structure with 1~4 generators is proposed,and the influence of the number of equivalent generators on equivalence accuracy is analyzed.Finally,time-domain simulation analysis is made for different disturbance scenarios,and the effectiveness of the proposed equivalent modeling method is verified.

关 键 词：新能源 等值 电磁暂态 仿真 频域 

分 类 号：TM71[电气工程—电力系统及自动化]