沙戈荒新能源基地过电压及抑制策略分析研究  

Analysis and Research on Overvoltage and Suppression Strategy of Sand Gobi Desert New Energy Base

作　　者：赵进国 牛浩明 牛甄 张旭军 ZHAO Jin-guo;NIU Hao-ming;NIU Zhen;ZHANG Xu-jun(State Grid Gansu Power Electric Power Research Institute,Lanzhou 400090,China)

机构地区：[1]国网甘肃省电力公司电力科学研究院,甘肃兰州400090

出　　处：《电工电气》2024年第12期27-33,共7页Electrotechnics Electric

基　　金：国网甘肃省电力公司科技项目(522722230003)。

摘　　要：沙漠、戈壁、荒漠(沙戈荒)新能源基地远离交流主网,无功支撑能力不足,通过特高压直流系统送出时,会面临更为严重过电压问题。结合近区交流故障以及直流故障,梳理了典型交直流故障下直流送端电网过电压产生机理,根据甘肃电网某沙戈荒新能源基地电网仿真模型,研究了送端交流系统过电压的主要影响因素,并基于实际电网生产运行,从配套火电建设、分布式调相机配置、特高压柔性直流应用等方面给出了抑制过电压的有效措施。Deserts,gobi,and deserts(sand gobi desert)new energy bases are far away from the AC main grid,and the reactive power support capability is insufficient.When transmitted through ultra-high voltage DC systems,they will face more severe overvoltage issues.By combining nearby AC faults and DC faults,the mechanism of overvoltage generation in the DC sending-end power grid under typical AC and DC faults were sorted out.Based on the power grid simulation model of a sand gobi desert new energy base in Gansu's power grid,the main factors affecting overvoltage in the sending-end AC system were studied.From the perspective of actual power grid production and operation,effective measures to suppress overvoltage were proposed in terms of supporting thermal power construction,distributed regulator configuration,and the application of ultra-high voltage flexible DC.

关 键 词：沙戈荒 新能源基地 特高压直流输电 过电压 分布式调相机 柔性直流 

分 类 号：TM712[电气工程—电力系统及自动化] TM86