TY - GEN
T1 - A method for optimizing cable service life via redistributing circuit current in an underground cable trench
AU - Li, Qiufang
AU - Bao, Yuchuan
AU - Yang, Hongfei
AU - Tian, Zhi
AU - Wang, Hang
AU - Zhou, Wenjun
AU - Zhou, Chengke
N1 - Publisher Copyright:
© 2017 IEEE.
PY - 2018/1/15
Y1 - 2018/1/15
N2 - Overtemperature due to accumulation of heat in a crowded cable trench accelerates the aging of cable insulation materials, and leads to shorter cable life. In order to assist maintenance engineers with additional information when increase in circuit ampacity demand requires installation of additional cables, an optimization method is proposed to reallocate the current of selected cable circuits using spare cable pipes in a cable trench. The objective is set in this paper as to limit the operating temperature and extend average service life of cables. Based on the Finite Element method, the temperature field in an underground cable trench which has 24 cable pipes, of which 20 have been occupied with operational cables, is simulated. According to previously reported cable aging theory, the stochastic electro-Thermal degradation accumulation in cables is modeled, and the average service life of cables in the trench is assessed. An optimization method of reallocating the current by adding cables in spare pipes is established. It is found from results of cable average service life assessment that, by adopting the proposed optimization method, the average service life of the cables in the trench can be increased by 2.2 years while the maximum conductor core temperature among cables in the trench is reduced by 1.9 °C, comparing with the redistribution which was adopted without applying the proposed method.
AB - Overtemperature due to accumulation of heat in a crowded cable trench accelerates the aging of cable insulation materials, and leads to shorter cable life. In order to assist maintenance engineers with additional information when increase in circuit ampacity demand requires installation of additional cables, an optimization method is proposed to reallocate the current of selected cable circuits using spare cable pipes in a cable trench. The objective is set in this paper as to limit the operating temperature and extend average service life of cables. Based on the Finite Element method, the temperature field in an underground cable trench which has 24 cable pipes, of which 20 have been occupied with operational cables, is simulated. According to previously reported cable aging theory, the stochastic electro-Thermal degradation accumulation in cables is modeled, and the average service life of cables in the trench is assessed. An optimization method of reallocating the current by adding cables in spare pipes is established. It is found from results of cable average service life assessment that, by adopting the proposed optimization method, the average service life of the cables in the trench can be increased by 2.2 years while the maximum conductor core temperature among cables in the trench is reduced by 1.9 °C, comparing with the redistribution which was adopted without applying the proposed method.
KW - Cable laying method
KW - Finite Element simulation
KW - Insulation life assessment
KW - Power cable
KW - Temperature field
U2 - 10.1109/CEIDP.2017.8257648
DO - 10.1109/CEIDP.2017.8257648
M3 - Conference contribution
AN - SCOPUS:85045222845
SN - 9781538611951
T3 - Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
SP - 241
EP - 244
BT - 2017 IEEE Conference on Electrical Insulation and Dielectric Phenomenon (CEIDP)
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2017 IEEE Conference on Electrical Insulation and Dielectric Phenomenon
Y2 - 22 October 2017 through 25 October 2017
ER -