Title :
Mechanism on breakdown phenomenon of cable joint with impurities
Author :
Chen, Chengwei ; Liu, Gang ; Lu, Guojun ; Wang, Jin
Author_Institution :
Sch. of Electr. Power, South China Univ. of Technol., Guangzhou, China
Abstract :
The electric-field intensity around the cable joint is computed based on the finite element method when the power cable is loaded on the 110 kV constant voltage source. If there are impurities in the cable joint, the impurities would cause the local electrical field distorted and the electric-field intensity increasing sharp. The insulation materials are breakdown when the local electrical field is distorted for the intensity exceeding the dielectric strength possibly. To analyze the mechanism on breakdown phenomenon mathematical models are established according to cable joint with impurities, and the distribution of the electric-field intensity on the models is computed when loaded on the 110 kV constant voltage source. In the test, cable joint with impurities run on different constant voltage source. The result shows the discharge path in the cable joint with impurities.
Keywords :
cable jointing; electric breakdown; impurities; breakdown phenomenon; cable joint; constant voltage source; electric-field intensity; impurities; voltage 110 kV; Breakdown voltage; Dielectric breakdown; Dielectric materials; Dielectrics and electrical insulation; Electric breakdown; Finite element methods; Impurities; Mathematical model; Power cable insulation; Power cables; electrostatic field; finite element method; impurity; mechanism on breakdown; power cable´s joint;
Conference_Titel :
Properties and Applications of Dielectric Materials, 2009. ICPADM 2009. IEEE 9th International Conference on the
Conference_Location :
Harbin
Print_ISBN :
978-1-4244-4367-3
Electronic_ISBN :
978-1-4244-4368-0
DOI :
10.1109/ICPADM.2009.5252358
