CAJ | 학술논문

电力系统发生短路故障时,巨大的短路能量注入到金属氧化物限压器（metal oxide voltage limiter,MOV）上,导致其温度快速升高。为保证MOV的可靠运行,延长其使用寿命,需要尽快散热降温。因此,MOV冷却结构的设计和了解MOV的温度分布非常重要。为此,提出了一种新型MOV冷却结构,并基于传热学的理论建立了MOV三维温度场有限元法计算模型。用有限元计算软件ANSYS系统地计算分析了MOV冷却通道的直径、条数和分布等几何量对于通风道内传热特性的影响。结果表明：这种新型冷却结构的MOV要比传统MOV的散热能力更好,MOV散热能力随冷却通道直径不同而变化,通道直径存在约10 mm的最优值,此时冷却结构散热效果较好,4条冷却通道比2条冷却通道具有更好的散热效果。
전력계통발생단로고장시,거대적단로능량주입도금속양화물한압기（metal oxide voltage limiter,MOV）상,도치기온도쾌속승고。위보증MOV적가고운행,연장기사용수명,수요진쾌산열강온。인차,MOV냉각결구적설계화료해MOV적온도분포비상중요。위차,제출료일충신형MOV냉각결구,병기우전열학적이론건립료MOV삼유온도장유한원법계산모형。용유한원계산연건ANSYS계통지계산분석료MOV냉각통도적직경、조수화분포등궤하량대우통풍도내전열특성적영향。결과표명：저충신형냉각결구적MOV요비전통MOV적산열능력경호,MOV산열능력수냉각통도직경불동이변화,통도직경존재약10 mm적최우치,차시냉각결구산열효과교호,4조냉각통도비2조냉각통도구유경호적산열효과。
During the short-circuit fault in power system,a huge short-circuit energy will inject into metal oxide voltage limiter（MO） mandrel,leading to the rapid temperature rise of MOV.To ensure the reliable running of MOV and to extend its service life,MOV needs to cool as soon as possible.Therefore,MOV cooling structure with the excellent cooling efficiency and the knowledge for the temperature distributions of MOV mandrel are of essential importance.We proposed a new cooling structure of MOV,and established a finite element model of MOV 3D temperature field based on the theory of heat transfer.For the proposed cooling structure of MOV and the calculation model,the systematical calculations and analyses of the influences of the diameter,numbers and distributions of the cooling channel on the heat transfer were performed using the finite element software ANSYS.It is shown that the efficiency of the cooling structure can be changed by changing its diameter,there is an optimum diameter of 10 mm,where the good cooling efficiency is obtained,and the efficiency of cooling structure with the four channels is superior to that with the two channels.