Study on Risk Assessment of Power Transformer Based on Life Cycle Quality Information

Abstract:

It has significant impact on the safe operation of the power grid for large scale power transformer. The technique is complex, and the manufacture process is long. The users always take the manufacturing supervision on spot as the quality control method. The quality is determined during the manufacturing process. The quality defects may cause serious safe problems. It has important significance to strengthen the risk assessment and prevention. The quality defects of power transformer are classified based on the fault tree analysis theory. The quality defects of power transformer from the manufacturing supervision of State Grid Corporation of China (SGCC) in 2012 are analyzed as examples. The manufacturing process has multiple layers and factors. The index system for comprehensive evaluation of transformer is put forward. A risk assessment model for power transformer based on fuzzy synthetic evaluation is built. The example shows that the method can estimate the risk effectively. It can provide feasible decision basis for the risk management and maintenance.

• Periodical: Applied Mechanics and Materials (Volume 615)
• Pages: 88-92
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.615.88
• Online since: August 2014
• Authors: Tian Shu Bi, Jin Meng Chen*
• Keywords: Fuzzy Synthetic Evaluation, Life Cycle Quality Information, Power Transformer, Risk Assessment

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