• CSCD核心库收录期刊
  • 中文核心期刊
  • 中国科技核心期刊

ELECTRIC POWER CONSTRUCTION ›› 2014, Vol. 35 ›› Issue (4): 50-54.doi: 10.3969/j.issn.1000-7229.2014.04.008

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Reliability Analysis of Four-Circuit-on-Same-Tower Power Transmission Systems

SUN Yujiao, QIN Xiaohui, ZHOU Qinyong   

  1. China Electric Power Research Institute, Beijing 100192, China
  • Online:2014-04-01

Abstract:

The multi-circuit-on-same-tower power transmission technologies are more and more often used in areas with scarce transmission corridor sources or with special geography environments. Along with the voltage grades increase of multi-circuit-on-same-tower power transmission systems, the reliability of these transmission systems has an important influence on power systems’ security, stability and reliability. The traditional combined-model-based methods in reliability evaluation have the disadvantages of complex models and intensive computation. The reliability evaluation method based on separation models can overcome these disadvantages. Adopting the reliability assessment method based on separation models, this paper provided the probability formulas of different types of faults in four-circuit-on-same-tower transmission systems and four-circuit-on-two-towers transmission systems. And then according to the common faults’ outage frequency and repair time, this paper evaluated and compared the reliability of four-circuit-on-same-tower power transmission systems and four-circuit-on-two-tower powers transmission systems. It is pointed out that the reliability of four-circuit-on-same-tower power transmission systems is lower than that of four-circuit-on-two-towers power transmission systems.

Key words: four-circuit-on-same-tower, four-circuit-on-two-towers, reliability evaluation, outage probability, separation model