±550kV直流气体绝缘金属封闭开关设备长期带电试验研究  

Study on long-term live test for±550kV DC gas insulated switchgear

作　　者：姚璇 南振乐 杜文娟 张博雅 李奕萱 YAO Xuan;NAN Zhene;DU Wenjuan;ZHANG Boya;LI Yixuan(Xi’an XD Switchgear Electric Co.,Ltd,Xi’an 710077;State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an 710049)

机构地区：[1]西安西电开关电气有限公司,西安710077 [2]西安交通大学电力设备电气绝缘国家重点实验室,西安710049

出　　处：《电气技术》2024年第3期46-52,共7页Electrical Engineering

摘　　要：现有海上风电送出换流平台的直流侧均采用常规敞开式设备及电气连接布局,设备占用空间大。为了有效减小平台面积及质量,采用直流气体绝缘金属封闭开关设备(GIS)替代原有敞开式设备。直流GIS绝缘件长期运行在单极性直流电压下,表面会产生电荷积聚,从而改变沿面电场分布,降低绝缘子沿面闪络电压。目前,暂无关于直流GIS的国际、国内标准,缺乏系统、全面的试验指导,开展长期带电试验考核可有效验证直流GIS的可靠性、稳定性。本文围绕长期带电试验方案及试验样机展开研究,基于多物理场耦合仿真结果,提出长期带电试验方案,并设计样机形态。The existing converter platform of the offshore wind power all adopts conventional open equipment and electrical connection layout,which occupies the large space.In order to reduce the platform space and weight,the DC gas insulated switchgear(GIS)is used to replace the original open equipment.Insulation parts operate under the unipolar DC voltage for a long time,which generates surface charge accumulation,thus changing the electric field distribution and reducing the flashover voltage.There is no international and domestic standard for DC GIS,and systematic test guidance and operation experience are short.The long-term live test(prototype installation test)can effectively verify the reliability and stability of DC GIS.This paper focuses on the long-term test scheme and prototype,based on the multi-physical field coupling simulation,proposes the test scheme,and designs the prototype form.

关 键 词：海上风电柔性直流输电 直流气体绝缘金属封闭开关设备(GIS) 表面电荷积聚 长期带电试验 

分 类 号：TM595[电气工程—电器] TM614