Study on Influence of Aging on Vibration Characteristics of T ransformer

Abstract

It is important to assess the insulation aging state of transformers, which can not only avoid equipment faults, but also improve the economic benefits of transformer operation. The main negative effect of transformer insulation aging is the decline of insulation mechanical properties, which will eventually lead to transformer fault. In this paper, the transformer vibration characteristic test platform is built and the vibration characteristic variables are defined to describe the vibration characteristic quantitatively. Then, the vibration characteristics and vibration variables of transformer tank surface under different aging time are studied by accelerated aging test in the laboratory. Finally, the vibration signals of transformers in service under different operation time are measured. And the vibration characteristics and vibration variables of in-service transformers under different operation time are analyzed and studied. This paper directly aims at the mechanical characteristics of insulation, and studies the relationship between insulation aging state and vibration of transformer. It provides a basis for more effective and direct monitoring of insulation aging state.