1000kV电压互感器选型及罐式CVT的研制  

Lectotype of Voltage Transformer for 1 000 kV and Development of Tank-type CVT

作　　者：王晓琪[1] 吴春风[2] 李璿[1] 王欢[1] 

机构地区：[1]中国电力科学研究院,武汉430074 [2]泰开电气集团有限公司,泰安271000

出　　处：《高电压技术》2012年第12期3292-3297,共6页High Voltage Engineering

基　　金：国家电网公司科技项目(SGTGY JSFW(2012)346)~~

摘　　要：为满足后续特高压交流工程建设需求,对1 000kV特高压交流工程电压互感器的选型进行了研究,并开展了1 000kV罐式电容式电压互感器(罐式CVT)的研制。同时分析了我国1 000kV特高压交流工程用电压互感器选型所考虑的因素,着重介绍了1 000kV特高压交流工程气体绝缘变电站(GIS)用罐式CVT所具有的特点及试验情况。研制的罐式CVT的耦合电容分压器及电磁单元均为SF6气体绝缘结构,其中高压臂电容为2个金属同轴电极结构,耦合电容分压器额定电容量仅有500pF甚至300pF,二次输出可以满足30VA或10VA的容量要求。该罐式CVT样机已顺利通过例行试验,型式试验及特殊试验。最后对试验中的主要试验项目进行了分析,表明罐式CVT在绝缘性能、误差性能、铁磁谐振性能及暂态响应性能等方面都符合特高压GIS用电压互感器的技术要求。In order to choose a type of voltage transformer that suits the ultra-high voltage alternating current （UHVAC） system in China, various kinds of voltage transformers are compared and analyzed. Thereby, a new type of voltage transformer called tank-type capacitive voltage transformer （ tank-type CVT） is developed. The main characteristic of the tank-type CVT is that the high-voltage arm capacitor of its voltage divider is constituted by two coaxial electrodes in a sealed tank filled with SFs gas. Because of this new design, the high-voltage arm only needs a capacity of 500 pF or even 300 pF to obtain secondary outputs of 30~10 VA. The prototype of this tank-type CVT has passed the routine test, type test and special tests smoothly. Furthermore, some major programs of the tests are analyzed, and according to the test results, the tank-type CVT meets the technical requirements of UHV GIS in aspects of insulation, error, ferroresonance, and transient response, etc.

关 键 词：特高压交流(UHVAC) 罐式电容式电压互感器(罐式CVT) 同轴电极 电容分压器 电气绝缘性能 气体绝缘变电站(GIS) 

分 类 号：TM451[电气工程—电器]