Study On The Reliability Of Transformer Frameworks Based On The Probabilistic Sensitivity Technology

Nowadays, electrical power has become an indispensable source of energy in production and daily life. The electrical power must have to raise the voltage and then reduce voltage before transmitting to users. Transformer substations take important part in this process. As a result, the reliability of the transformer substations has been an important research content. Most of the transformer frameworks in the substation have been used for many years. A lot of damages such as crack, pocking, occurred. These damages of the column can reduce the reliability of the frameworks in the substation. There are few researches on this field.In order to evaluate the framework's reliability of the transformer substation, we try our best to find a reliable way to realize it and have achieved some results. This paper introduces the probabilistic sensitivity technology to evaluate the reliability of the framework in substation. The main contents of this paper are as follows:1. Based on three typical frameworks in a substation, the finite element computation models are built.2. The probabilistic sensitivity technology is adopted to evaluate the sensitivity of the frameworks in the substation by using the maximum stress of the framework for the output parameter while material strength, component geometry, load, etc. for the input parameters. The sensitivity of the maximum stress to the input variables is computed.3. Based on the Probabilistic sensitivity technology, equivalent stiffness and damaged region imitation method are adopted to compute the weighing of every pillar and provide basis for fuzzy comprehensive evaluation of the framework.4. The united arithmetic method of Monte Carlo method and response surface method are introduced to compute the reliability of the framework and gain much more accurate results.