摘要
随着特高压交流工程建设的不断开展,越来越多特高压变电站将建设在低温地区。由于特高压开关设备普遍采用SF_6气体绝缘,在低温地区使用会存在低温液化问题,降低设备运行稳定性,提升电网运行风险,需采取措施提高设备耐受低温能力。基于设备重要性的考虑,对于1 100 kV GIS,宜采用户内布置方式。对于户外使用的1 100 kV出线套管和分支母线可采用降低气压的方法降低气体液化温度。对于其他电压等级的GIS设备,可在设备外壳加装加热装置,按一定程序对设备气室加热,保证绝缘和灭弧介质SF_6的状态稳定。上述低温应对措施均通过了低温试验考核,试验结果将为后续低温特高压站的建设和运行提供指导。
As the UHVAC power project develops, more and more UHV submission will build at low temperature area. As the insulating medium of UHVAC switchgear, SF6 is likely to liquefy at low temperature, which may reduce the stability of the switchgear and increase the operation risk of the state grid. It is necessary to take measures to improve the cold-resistant ability of the switchgear. Based on the importance of different switchgear, it is appropriate to carry out indoor installation for 1100 kV GIS. To some outdoor 1 100 kV busing and bus, reduce the SF6 pressure can make the liquefaction temperature lower to accommodate the cold environment. To 126 kV GIS and 550 kV GIS, it is effective to add heating devices around the switchgear, and heat it at certain procedure, which can keep the SF6 stable. All the measures have been tested by low temperature test. And the result can provide guidance for the latter construction and operation of UHV submission.
作者
刘焱
崔博源
王宁华
李心一
高延峰
许裕
LIU Yan;CUI Boyuan;WANG Ninghua;LI Xinyi;GAO Yanfeng;XU Yu(China Electric Power Research Institute, Beijing 100192, China;State Grid Corporation of China, Beijing 100031, China;Xi'an XD Switchgear Electric Co., Ltd., Xi'an 710077, China;Henan Pingzhi High Voltage Swithgear Co., Ltd., Henan Pingdingshan 467013, China;Beijing Hongda Nissin Electric Co., Ltd., Beijing 100176, China)
出处
《高压电器》
CAS
CSCD
北大核心
2019年第5期220-225,共6页
High Voltage Apparatus
基金
国家电网公司科技项目(极寒条件下特高压交流主设备性能及高寒地区特高压试验基地建设规划研究)~~
关键词
特高压
低温
开关设备
保温措施
ultra-high voltage(UHV)
low temperature
switchgear
heat preservation measures
