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Volume 25 Issue 4
Aug.  2012
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Journal of Southwest Jiaotong University  > 2012  >  25(4): 646-651.
ZHOU Kai, LI Xutao, HUANG Youcong, WAN Li, ZHAO Wei. Formation Mechanism of Hot Spot in Stress Control Cable Terminations under Harmonic Voltages[J]. Journal of Southwest Jiaotong University, 2012, 25(4): 646-651. doi: 10.3969/j.issn.0258-2724.2012.04.018
Citation: ZHOU Kai, LI Xutao, HUANG Youcong, WAN Li, ZHAO Wei. Formation Mechanism of Hot Spot in Stress Control Cable Terminations under Harmonic Voltages[J]. Journal of Southwest Jiaotong University, 2012, 25(4): 646-651. doi: 10.3969/j.issn.0258-2724.2012.04.018
shu

Formation Mechanism of Hot Spot in Stress Control Cable Terminations under Harmonic Voltages

doi: 10.3969/j.issn.0258-2724.2012.04.018
  • Received Date: 03 Nov 2011
  • Publish Date: 25 Aug 2012
    Abstract
  • In order to investigate the premature failure of a stress control cable termination under high frequency harmonic voltages, the relationship between hot spot and applied voltage frequency was researched to the stress control cable termination. A high frequency harmonic generator was utilized to simulate practical harmonic voltage waveforms in a medium voltage power system. Infrared thermal images and non-linear transient electric field of the termination were analyzed under different frequency harmonic voltages. The research results show that with the rise in harmonic frequency, an obvious hot spot forms in local region on surface of the termination and temperature of the hot spot also rise. The hot spot is mainly connected to the high frequency components resulting in high electric field strength in the local region. From 100 Hz to 20 kHz, the electric field strength and the heating power both increase markedly in the local region on the surface of the termination.

     

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