Experimental device and experimental method for transformer oilpaper insulating thermal ageing

Abstract

The invention belongs to the technical field of transformer ageing detection. An experimental device for transformer oilpaper insulating thermal ageing consists of an outer cavity, an inner cavity and a measurement-display system, wherein the inner cavity consist of a main cavity body, an oil conservator on the main cavity body, an electrode-sample test frame inside the main cavity body and a minor cavity body; the minor cavity body and the main cavity body are connected through a pipeline; a valve is arranged on the pipeline; and an air exhaust port and an oil injection port are arranged on the main cavity body. An experimental method for transformer oilpaper insulating thermal ageing comprises the following steps: 1) performing insulating-paperboard vacuum dry sample treatment; 2) placing sample and injecting oil; 3) installing the minor cavity body; 4) injecting transformer oil; 5) accelerating thermal ageing experiment; 6) measuring dielectric parameters on line to acquire related experiment data; and 7) analyzing off-line sample physicochemical parameters to acquire experiment data. The invention can measure the dielectric parameters of the samples on line in real time, regularly samples on the premise of not changing the prior test environment of the samples, and can research thermal ageing laws of oilpaper insulating materials of large-scale power transformers.

Description

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AI Technical Summary

Benefits of technology

This experiment allows us to measure various properties such as temperature, moisture level, pH levels, etc., on an electrical conductor during its life span by measuring these values continuously over several hours or days instead of constantly relying upon any previous conditions that were present at once. By doing this we aimed towards studying how long it will have been exposed to high temperatures under specific environmental factors like humidity and pressure. These results help researchers better understanding the physical condition of their materials when they use them in industrial applications where heat needs to pass through from one part of the body to another parts quickly enough.

Problems solved by technology

This technical problem addressed in this patents relates to improving the accuracy and efficiency of testing oil-filled electrical equipment during service hours due to factors like environmental stressors or physical damage from weather events. Current non-contact sensory techniques have limitations including limited ability to detect changes over longer periods compared to existing contactless measurement devices. There needs improvement in the design and manufacturing processes associated with oil-insulator components, specifically through improved understanding of how they behave when exposed to certain types of environments.

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