InApril2005,theSouthernPowerGridCo.,Ltd.entrustedChinaPowerEngineeringConsultingGroupCorporationwithanevaluationofafeasibilitystudyreport(partofsystemtransmissionscheme)onthefirstUHVprogram-Yun-GuangDCtransmissionproject.Itsvoltageclassandtransmissioncapacityaretobe+_800kVand5000MWrespectively.ItsstartingpointwillbeinthenorthwestofKunmingandconvertersubstationwillbeinZengdongDistrictofGuangzhou.Evaluationexpertsheldthat,1)YunnanisrichinenergyresourcesavailabletobuildenergybasesandGuangdonghasalargemarketspacetoreceiveelectricityfromYunnan;2)the+800-kVDCtransmissiontechniqueiseconomicallyfeasible;