分频输电系统研究现状、趋势与展望  

Status,Trends and Prospects of the Fractional Frequency Transmission System

作　　者：王锡凡[1] 刘沈全 王秀丽[1] 赵勃扬 李群 周前 WANG Xifan;LIU Shenquan;WANG Xiuli;ZHAO Boyang;LI Qun;ZHOU Qian(School of Electrical Engineering,Xi’an Jiaotong University,Xi’an 710049,Shaanxi Province,China;South China University of Technology,Guangzhou 510641,Guangdong Province,China;Electric Power Research Institute,State Grid Jiangsu Electric Power Co.,Ltd.,Nanjing 211103,Jiangsu Province,China)

机构地区：[1]西安交通大学电气工程学院,陕西省西安市710049 [2]华南理工大学,广东省广州市510641 [3]国网江苏电力科学研究院,江苏省南京市211103

出　　处：《中国电机工程学报》2024年第17期6775-6786,I0007,共13页PROCEEDINGS OF THE CHINESE SOCIETY FOR ELECTRICAL ENGINEERING

基　　金：国家电网有限公司科技项目(4000-202218073A-1-1-ZN)。

摘　　要：分频输电又称低频输电,通过降低输电频率减轻线路电感、电容的影响,可以显著提升交流线路的输电容量与距离,是一种兼顾输电容量与工程经济性的新型输电方式,在我国新能源基地加速开发的背景下备受关注。我国“十四五”规划确立了大力开发“沙戈荒”新能源基地与深水远岸区域海上风电的新能源发展格局。“沙戈荒”新能源基地与负荷中心逆向分布,海上风电可用馈入点资源紧张,新能源大规模综合利用亟需新型高效的输电方式。近年来分频输电系统理论与技术迅速发展,该文旨在总结分频输电领域的研究成果,从基本原理与系统构建方法、系列关键装备、高电压大功率变频器与系统控制技术、系统分析与安全稳定保护技术4个角度,梳理分频输电系统理论与技术的发展现状与主要成果,并展望未来发展趋势,为分频输电系统研究起到承上启下的作用。The fractional frequency transmission system(FFTS),also known as low-frequency ac transmission,utilizes a relatively low frequency,e.g.,50/3 Hz,to alleviate the negative effects of the line capacitance and inductance on the power transmission,and therefore,increases the transmission capacity and distance.The FFTS makes good tradeoff between technical performance and engineering economy of the power transmission project,emerging as a prominent topic with the growth of renewable energy.China’s“14th Five-Year Plan”outlines a commitment to vigorously develop scaled renewable energy bases in deserts,gobi and wasteland in its vast west,as well as offshore wind power in deep-water and far-shore areas along its eastern coastal lines.However,the western energy bases and load centers are inversely distributed,and the available integration points for offshore wind power are limited.Therefore,efficient power transmission methods are necessary to support the large-scale comprehensive utilization of these renewable energy.The FFTS has experienced a tremendous advance in both academic research and engineering practice in recent years.This paper summarizes the research results of the author's team and other scientific research institutions,and systematically organizes the development status and main achievements of the FFTS from four perspectives:basic principles and system construction methods,key power equipment,high-voltage and bulky-power inverters and the control technology,system safety and stability analysis and protection.Then,the future development trends and prospects are discussed.

关 键 词：分频输电系统 低频输电系统 系统构建 三倍频变压器 模块化多电平矩阵变换器 继电保护 

分 类 号：TM722[电气工程—电力系统及自动化]