摘要
高比例新能源地区通过大规模常规高压直流外送时,直流输电故障容易引起送端系统暂态过电压问题。通过采用具备电网支撑能力的逆变器设备,并结合高性能控制系统,设计了一种新型的基于能量同步转换技术的装置来抑制新能源暂态过电压。通过适当配置该装置可在提升系统整体稳定水平的同时,较好地抑制直流系统故障后的暂态过电压,解决直流故障引起的新能源大面积脱网问题。最后,通过对青豫直流送端电网的仿真分析和装置的性能测试,验证了其准确性和有效性。
When large-scale conventional HVDC transmit electric power in the high renewable energy penetration area, HVDC transmission system fault can easily cause transient overvoltage problems at sending-end. In this paper, with grid-forming inverter and high-performance control system, a new device based on energy synchronous conversion technology is designed to suppress the transient overvoltage. By properly configuring the device, it can not only improve the stability of the power system, but also suppress the transient overvoltage after HVDC fault and solve the problem of large-scale disconnection of renewable energy caused by HVDC fault. Finally, the simulation analysis of Qingyu HVDC sending-end grid and the performance test of the device verify its accuracy and effectiveness.
作者
田旭
刘飞
张君
白左霞
TIAN Xu;LIU Fei;ZHANG Jun;BAI Zuoxia(State Grid Economic and Technological Research Institute of Qinghai Electric Power Company,Xining 810000,China;State Grid Qinghai Electric Power Company,Xining 810000,China)
出处
《南方电网技术》
CSCD
北大核心
2022年第10期95-103,共9页
Southern Power System Technology
关键词
能量同步转换
新能源
高压直流
过电压抑制
energy synchronous conversion
renewable energy
HVDC
overvoltage suppression
作者简介
田旭(1977),男,工程师,学士,从事电力系统分析、新能源并网发电研究,13897640106@163.com;刘飞(1988),男,高级工程师,硕士,从事电力系统分析、新能源并网发电研究,liufei602@163.com;通信作者:张君(1994),女,助理工程师,硕士,从事电力系统分析、新能源并网发电研究,zj19940526zj@163.com。
