提升新疆东部以及青海新能源外送能力的±800kV四端柔性直流电网方案初设  

Preliminary Design of Novel Four-terminal VSC-HVDC Grid for Improving Power Transfer Capability of Renewable Energy in Xinjiang-Qinghai Region

作　　者：贺之渊 刘栋 朱琳 HE Zhiyuan;LIU Dong;ZHU Lin(State Key Laboratory of Advanced Power Transmission Technology(State Grid Smart Grid Research Institute Co.,Ltd.,),Changping District,Beijing 102209,China;Beijing Key Laboratory of DC Grid Technology&Simulation(State Grid Smart Grid Research Institute Co.,Ltd.,),Changping District,Beijing 102209,China)

机构地区：[1]先进输电技术国家重点实验室(国网智能电网研究院有限公司),北京市昌平区102209 [2]直流电网技术与仿真北京市重点实验室(国网智能电网研究院有限公司),北京市昌平区102209

出　　处：《电网技术》2023年第6期2443-2451,共9页Power System Technology

基　　金：国家电网有限公司科技项目(5100-202158353A-0-0-00)。

摘　　要：西北地区新能源资源丰富且已建成数个10GW级新能源基地。选取新疆东部、青海南部等具有代表性新能源基地,对这些地区电网的现状及存在的问题进行深入研究。基于各电网特性,提出了基于柔性直流技术的直流组网方案,并对所提直流系统建立了仿真模型,对系统的潮流分布及转移能力、故障穿越特性等进行初步仿真分析。研究结果表明所提直流系统可提升新疆东部及青海南部电网暂稳态特性、促进新能源外送,并可为解决西北地区整体面临的问题提供解决思路。Northwest China is rich in renewable energy resources and has commissioned several tens of GW-level renewable energy bases.This paper focuses on the representative renewable energy bases in eastern Xinjiang and southern Qinghai regions,and conducts in-depth studies on the current status and problems of power grids in these regions.On the basis of the power grid characteristics,this paper proposes a DC grid based on the VSC-HVDC technology,establishes its simulation model,and analyzes the power flow distribution,the power flow transfer capacity and the fault ride-through characteristics of the proposed system.The results show that the proposed DC system effectively improves the steady and transient-state characteristics of the power grids in eastern Xinjiang and southern Qinghai areas.It helps promote the delivery of renewable energy.In the meantime,the proposed method provides solutions for solving the problems faced in the northwest region.

关 键 词：新能源外送 新能源与火电打捆 特高压 直流电网 附加阻尼控制 虚拟惯量 

分 类 号：TM721[电气工程—电力系统及自动化]