CAJ | 학술논문

由于我国用电负荷中心和能源产能中心呈逆向分布，唯有建设全国性的大电网，才能满足大规模可再生能源的远距离输送和异地消纳[1]。高电压、大容量变压器的发展显得尤为重要[2]，而容量和电压的增加必然带来变压器短路电动力的更大幅度的增加，而由辐向短路力引起的绕组稳定性问题一直制约着大容量、高电压变压器的发展[3]。变压器外部线圈导线被幅向短路力拉长，容易引起外绕组匝绝缘因拉应力而发生断裂[4]。若外绕组幅向力大于绕组的临界应力时，会产生残余变形，残余变形会带来绕组匝绝缘的破坏，严重时甚至会引起匝间短路[5]，因此有必要探究外绕组的极限形变量，为变压器设计提供参考依据。
유우아국용전부하중심화능원산능중심정역향분포，유유건설전국성적대전망，재능만족대규모가재생능원적원거리수송화이지소납[1]。고전압、대용량변압기적발전현득우위중요[2]，이용량화전압적증가필연대래변압기단로전동력적경대폭도적증가，이유복향단로력인기적요조은정성문제일직제약착대용량、고전압변압기적발전[3]。변압기외부선권도선피폭향단로력랍장，용역인기외요조잡절연인랍응력이발생단렬[4]。약외요조폭향력대우요조적림계응력시，회산생잔여변형，잔여변형회대래요조잡절연적파배，엄중시심지회인기잡간단로[5]，인차유필요탐구외요조적겁한형변량，위변압기설계제공삼고의거。
Because of electricity load centers and energy capacity center was reverse distributed, only the construction of the national power grid that meet large-scale long-distance transmission of renewable energy and off-site consumptive[1]. The development of high voltage, large-capacity transformer is very important[2], the increasing for capacity and voltage inevitably bring that the power transformer short-circuit force more substantially increase[3],the winding radial stability problems which caused by short-circuit power force has been restricted to the development of large capacity, high-voltage transformers. Except to the inside windings buckling deformed[6],External coil conduct is elongated by the radial short-circuit force, causing the outer winding turn insulation fracture is an another cause factor[7]. Tensile stress greater, the greater the magnitude of the windings is elongated, if the out winding radial short-circuit force is larger than critical stress, the winding deformation will not disappear immediately, residual deformation can break the windings insulation, and even lead to inter-turn short circuit[8], therefore it is necessary to explore the outer winding limits of deformation, provide a reference for the transformer design.