CAJ | 학술논문

　　为研究高频谐波电压下电缆头的失效原因，本文对电缆头（非线性应力控制型）在高频谐波电压下的热点温度升高现象及原因进行了研究。搭建了高频、高压和大电流发生装置以模拟电缆头的实际工况，研究了有、无负荷电流下的红外图像特征和电压对热点温度的影响。建立了电缆头的有限元模型，通过电热耦合分析软件对电缆头进行电场和温度场耦合仿真分析，结合电缆头红外热图像分析了谐波电压对电缆头温升的影响。分析结果表明，随着电压值的增加，非线性应力管的局部位置电场增强，并存在一个电场阈值，当大于该阈值时，阻性发热迅速增加，导致表面形成温度升高。
　　위연구고빈해파전압하전람두적실효원인，본문대전람두（비선성응력공제형）재고빈해파전압하적열점온도승고현상급원인진행료연구。탑건료고빈、고압화대전류발생장치이모의전람두적실제공황，연구료유、무부하전류하적홍외도상특정화전압대열점온도적영향。건립료전람두적유한원모형，통과전열우합분석연건대전람두진행전장화온도장우합방진분석，결합전람두홍외열도상분석료해파전압대전람두온승적영향。분석결과표명，수착전압치적증가，비선성응력관적국부위치전장증강，병존재일개전장역치，당대우해역치시，조성발열신속증가，도치표면형성온도승고。
In order to understand the effect of high frequency harmonic voltage on premature failure of a terminal(a nonlinear stress control type), this paper investigates the temperature rise of hot spot and causess at high frequency harmonic voltage. With high frequency, high voltage and large current generating equipments being set up to simulate actual operating conditions,the characteristics of infrared thermal images and effects of voltage amplitude on hot spot temperature rise are also studied with and without current. Moreover, by using the electric-heat coupling analysis method, the electric field and temperature distribution are obtained.With using the infrared images of the cable terminal, effects of increasing voltage on hot spot temperature rise are analyzed. The research result shows that with the increasing of voltage amplitude the temperature rise of the nonlinear stress control cable terminal boosts up , and a threshold of electric field occures. Once the electric field of the stress control tube is larger than the threshold, the resistive heating greatly rises, which leads the surface temperature to rise.