The simulation analysis of electrical-thermal coupling fields of different cable terminals in substation at harmonic frequencies
ZHAO Qingjie1, SHI Lei2, CHAI Bin1
1. Ultra-High Voltage Company of State Grid Ningxia Electric Power Co., Ltd, Yinchuan 750000;
2. State Grid Ningxia Electric Power Co., Ltd, Yinchuan 750000
To investigate the thermal failure, breakdown and a series of problems of cable termination under high frequency harmonics, and clarify the causes offering the hot spot on the terminal surface under high frequency harmonics, a finite element simulation model of the electrical-thermal coupling field of cable termination is set up to analyze the mechanism of forming the hot spot. The results show that for nonlinear stress controlled cables, high frequency harmonics will increase the local electric field intensity and the total power loss density at the cut-off position of the cable semi-conductive layer, resulting in the formation of hot spots on the cable terminal surface; for the stress cone cable terminal, because the conductivity of the material is not affected by the change of harmonic frequency and the total power loss density is also very small, the heating is not serious and no hot spots appear.
赵庆杰, 史磊, 柴斌. 变电站不同类型电缆终端在谐波频率作用下的电-热耦合场仿真分析[J]. 电气技术, 2022, 23(5): 45-49.
ZHAO Qingjie, SHI Lei, CHAI Bin. The simulation analysis of electrical-thermal coupling fields of different cable terminals in substation at harmonic frequencies. Electrical Engineering, 2022, 23(5): 45-49.
2022, Vol. 23 
