柔性低频输电系统宽频振荡研究现状与展望  

Research Status and Challenges of Wide-band Oscillation in Flexible Low-frequency Transmission System

作　　者：向念文 王书来 邵冰冰 丁超 韩彬 赵国亮 XIANG Nianwen;WANG Shulai;SHAO Bingbing;DING Chao;HAN Bin;ZHAO Guoliang(School of Electric Engineering and Automation,Hefei University of Technology,Hefei 230009,China;State Grid Zhejiang Electric Power Corporation Research Institute,Hangzhou 310014,China;China Electric Power Research Institute,Beijing 100192,China;State Key Laboratory of Advanced Power Transmission Technology(State Grid Smart Grid Research Institute),Beijing 102209,China)

机构地区：[1]合肥工业大学电气与自动化工程学院,合肥230009 [2]国网浙江省电力有限公司电力科学研究院,杭州310014 [3]中国电力科学研究院有限公司,北京100192 [4]先进输电技术全国重点实验室(国网智能电网研究院有限公司),北京102209

出　　处：《高电压技术》2024年第5期1967-1977,共11页High Voltage Engineering

基　　金：国家重点研发计划(2021YFB2401100);国家电网有限公司科技项目(5211DS22002C)。

摘　　要：柔性低频输电系统中含有交交换流器等电力电子设备,导致控制环节存在宽频带动态耦合,从而引发宽频振荡问题。同时,柔性低频输电系统相比于直流输电系统多出异频交互特性,其动态特性更加复杂,宽频带动态交互问题更为突出,解决系统宽频振荡问题是保证系统稳定运行的重要前提。首先阐述了柔性低频输电系统可适用于3种不同类型下的输电场景,并在此基础上分析不同应用场景下系统可能存在的宽频带动态交互过程和现有工程中存在的振荡现象。然后,对柔性低频输电系统宽频振荡问题和抑制策略进行概述和总结,指出目前研究在宽频振荡分析和抑制上存在的不足。最后,对柔性低频输电系统宽频振荡场景、机理和抑制方法等方面进行展望,为柔性低频输电系统宽频振荡问题的后续研究提供参考和借鉴。Flexible low-frequency transmission system contains power electronic equipment such as AC/AC converters,which leads to the dynamic coupling of the control link in a wide frequency band,and then results in wide-band oscillation problems.At the same time,compared with the DC transmission system,the flexible low-frequency transmission system exhibits inter-frequency interaction characteristics.Therefore,its dynamic characteristics are more complex,and the problem of wide-band dynamic interaction is more prominent.Solving the wide-band oscillation problem of the system is an important prerequisite for system stability.First,it is expounded that the flexible low-frequency transmission system can be applied to three types of power transmission scenarios,and on this basis,the wide-band dynamic interaction processes that may exist in the system under different application scenarios and the oscillation phenomenon that exists in projects are analyzed.Then,the wide-band oscillation problem and suppression strategies of flexible low-frequency transmission system are summarized,and the deficiencies in the current research on wide-band oscillation analysis and suppression are pointed out.Finally,the prospects in oscillation outlook,mechanism and suppression methods of the wide-band oscillation in the flexible low-frequency transmission system are put forward,providing reference for the follow-up research on the wide-band oscillation of the flexible low-frequency transmission system.

关 键 词：柔性低频输电系统 适用场景 宽频振荡 动态交互 振荡分析 抑制策略 

分 类 号：TM712[电气工程—电力系统及自动化]