同塔雙回線單線故障測距與選相方法研究
[Abstract]:In addition to single circuit fault, there are 120 kinds of cross line faults in the same tower double circuit transmission line. Among them, there are 98 cross line faults and 22 single circuit faults. Although the cross-line fault has an overwhelming advantage in the fault type, the statistical data show that the probability of single circuit line fault is very large, while the cross-line fault only accounts for 20-30 of the total fault of the same tower double-circuit line. Therefore, for the same tower double circuit transmission line, the single line fault of the same tower double circuit line should be considered as well as the cross line fault. The special type and complexity of the double circuit transmission line with the same tower are analyzed. The decoupling matrix of the three phase system is extended to the double circuit transmission line of the same tower, and the decoupling matrix of the double circuit transmission line of the same tower is established. This paper analyzes the special structure of double circuit transmission line of the same tower, which is a ring network. According to this characteristic, the traveling voltage wave and the time domain ranging method are introduced respectively. A voltage traveling wave location method and a time domain fault location method are proposed for single line fault of double circuit line of the same tower. Combining wavelet energy and fractal box dimension with the minimum bounding circle algorithm, the fault phase selection method can be overcome.
【學位授予單位】:昆明理工大學
【學位級別】:碩士
【學位授予年份】:2014
【分類號】:TM75
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