CAJ | 학술논문

为满足后续特高压交流工程建设需求，对1000kV特高压交流工程电压互感器的选型进行了研究，并开展了1000kV罐式电容式电压互感器（罐式CVT）的研制。同时分析了我国1000kV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1000kV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SF。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。
위만족후속특고압교류공정건설수구，대1000kV특고압교류공정전압호감기적선형진행료연구，병개전료1000kV관식전용식전압호감기（관식CVT）적연제。동시분석료아국1000kV특고압교류공정용전압호감기선형소고필적인소，착중개소료1000kV특고압교류공정기체절연변전참（GIS）용관식CVT소구유적특점급시험정황。연제적관식CVT적우합전용분압기급전자단원균위SF。기체절연결구，기중고압비전용위2개금속동축전겁결구，우합전용분압기액정전용량부유500pF심지300pF，이차수출가이만족30VA혹10VA적용량요구。해관식cVT양궤이순리통과례행시험，형식시험급특수시험。최후대시험중적주요시험항목진행료분석，표명관식CVT재절연성능、오차성능、철자해진성능급잠태향응성능등방면도부합특고압GIS용전압호감기적기술요구。
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.