NDLI: Probabilistic cost-benefit analysis-based spare transformer strategy incorporating condition monitoring information

Content Provider	IET Digital Library
Author	Ren, Zhouyang Jiang, Yunpeng Li, Hui Gu, Yingzhong Jiang, Zhuohan Lei, Wenhao
Abstract	Determining an economical and reliable spare transformer strategy is an essential and challenging task for power utility companies. This study proposes a probabilistic cost-benefit analysis-based spare transformer strategy incorporating condition monitoring information. Not only the actual wearing condition of each transformer, but also the impacts of a transformer ageing process on spare transformer strategy are considered by the proposed method. First, the actual wearing condition and functional age of each transformer are estimated based on condition monitoring information. Secondly, the ageing process and ageing failure rate of each transformer are modelled by combining a Weibull distribution and its functional age. Thirdly, based on probabilistic cost-benefit analysis, the outage costs, as well as economic benefits under different inventory sizes, are estimated. The transformer's ageing process is modelled and considered in the determination of the optimal number and the acquisition timing of spare transformers. Finally, a transformer substation group and its condition monitoring information, and the real spare transformer strategy collected from a regional power grid in China were used to demonstrate an application of the proposed method. The results indicate that the spare transformer strategy determined by the proposed method not only enables the power utilities to avoid economic losses but also guarantees a high cost-benefit ratio of spare transformer strategy.
Starting Page	5816
Ending Page	5822
Page Count	7
ISSN	17518687
Volume Number	14
e-ISSN	17518695
Issue Number	Issue 24, Dec (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/14/24
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2020.0093
Journal	IET Generation, Transmission & Distribution
Publisher Date	2020-06-02
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Acquisition Timing Ageing Ageing Failure Rate China Regional Power Grid Condition Monitoring Condition Monitoring Information Cost-benefit Analysis Failure Analysis Functional Age Maintenance And Reliability Power Grid Power System Reliability Power Utility Companies Probabilistic Cost-benefit Analysis Probability Reliability Spare Transformer Statistics Substations Transformer Ageing Process Transformer And Reactors Transformer Substation Group Transformer Substations Wearing Condition Weibull Distribution
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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