At present, universal generating function (UGF) is a reliability evaluation technique which holds the
bare-looking and easily program-realized merits in multi-state system. Thus, it is meaningful to apply this method
to an actual industry system. Compressor systems in natural gas pipelines are series-parallel multi-state systems,
where the compressor units in each compressor station work in a parallel way and these pressure-boosting stations
in the pipeline are series connected. Considering the characteristic of gas pipelines, this paper develops two different
UGFs to evaluate the system reliability. One (Model 1) establishes a system model from every compressor unit
while the other (Model 2) considers the whole system as a combination of multi-state components. Besides, all the
parameters of “weight” in UGFs are obtained from thermal-hydraulic models based on the actual engineering and
“probability” from Monte Carlo simulation. The results show that the system reliabilities calculated by different
UGFs are approximately equal. In addition, the demand of gas and the gas pipeline transportation system show
a reverse trend. Because the number of parameters needed in Model 2 is far less than that needed in Model 1,
Model 2 is simpler programming and faster solved.
WEN Kai (温凯), LI Yichen (李熠辰), YANG Yang (杨洋), GONG Jing (宫敬)
. Reliability Evaluation of Compressor Systems Based on Universal Generating Function Method[J]. Journal of Shanghai Jiaotong University(Science), 2018
, 23(2)
: 291
-296
.
DOI: 10.1007/s12204-018-1929-6
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