Comparison of Cost-effective Distances for LFAC with HVAC and HVDC in Their Connections for Offshore and Remote Onshore Wind Energy  

作　　者：Xin Xiang Shiyuan Fan Yunjie Gu Wenlong Ming Jianzhong Wu Wuhua Li Xiangning He Timothy C.Green 

机构地区：[1]College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China [2]Department of Electronic and Electrical Engineering,University of Bath.Bath BA27AY,UK. [3]School of Engineering,Cardiff University,CF243AA Cardiff,UK. [4]Department of Electrical and Electronic Engineering,Imperial College London,London,SW72AZ,UK

出　　处：《CSEE Journal of Power and Energy Systems》2021年第5期954-975,共22页中国电机工程学会电力与能源系统学报（英文）

基　　金：supported by the National Natural Science Foundation of China(51925702,52107214);China-UK NSFC-EPSRC Joint Project(52061635101,EP/T021780/1).

摘　　要：For a cost-effective connection of large-scale longdistance wind energy,a low frequency alternating current(LFAC)transmission scheme(16.7 Hz or 20 Hz)is proposed as an alternative to the conventional high voltage alternating current(HVAC)transmission scheme(50 Hz or 60 Hz)and the recently popular high voltage direct current(HVDC)transmission scheme(0 Hz).The technical feasibility of the LFAC system is demonstrated but the basis for identifying the distance ranges for which LFAC would be preferable to HVAC and HVDC are not established and the dependence of this range on factors,such as power transfer rating,voltage rating and cable/line type,is not investigated.This paper presents an in-depth analysis for the overall cost of LFAC system and then provides an extensive comparison with HVAC and HVDC,to explore the distance ranges over which LFAC is cost-effective over both HVAC and HVDC in connections of offshore and remote onshore wind energy.The results demonstrate that the LFAC system does possess ranges in the intermediate distance for which it is more cost-effective than both HVAC and HVDC,and its overall cost advantage is generally larger in the overhead line(OHL)connection of remote onshore wind energy than the cable connection of offshore wind energy.

关 键 词：Cost-effective ranges LFAC overall cost analysis wind energy. 

分 类 号：TM614[电气工程—电力系统及自动化]