State monitoring and defect simulation system for electrical insulation performance of oil-immersed bushing

Abstract

The invention discloses a state monitoring and defect simulation system for the electrical insulation performance of an oil-immersed bushing, and the system comprises an oil pressure monitoring modulewhich is used for monitoring the pressure of insulating oil in the oil-immersed bushing; a vibration characteristic monitoring module which is used for monitoring the vibration frequency and amplitude of the oil-immersed sleeve in the operation process; a discharge characteristic monitoring module which is used for judging whether the oil-immersed bushing is in a normal operation state or not bytesting the magnitude of partial discharge pulse current at the end part of the oil-immersed bushing and a discharge spectrum; a discharge phenomenon observation module which is used for observing theposition of a discharge point in the oil-immersed bushing and recording a discharge process image and animation at the discharge moment; and a dielectric response test module which is used for evaluating the insulation condition of the insulation material or the insulation equipment by changing the frequency of the alternating current excitation, taking complex capacitance and dielectric loss asfunctions of the frequency and using the change condition of the functions. According to the invention, comprehensive monitoring and analysis of electrical and mechanical property characteristic parameters can be carried out on defects.

Description

technical field [0001] The invention belongs to the technical field of state monitoring and fault analysis of the insulation performance of electrical equipment, and in particular relates to a state monitoring and defect simulation system of the electric insulation performance of an oil-immersed bushing. Background technique [0002] The bushing is an important part of the power transformer, and its insulation performance directly affects the safe and reliable operation of the transformer. When a transformer bushing fails, it will not only directly affect the normal operation of itself and the transformer, but also lead to risks in the safe operation of the power system and affect the safe power supply. It is of great engineering significance to study the insulation health status monitoring system of transformer bushings and analyze the characteristics and laws of different defects of bushings, so as to detect bushing faults in time and help take effective measures to avoid ...

AI Technical Summary

Problems solved by technology

However, during the operation of the actual transformer bushing, it will be affected by various stresses such as electrical, mechanical and thermal at the same time, and the transformer bushing in poor operating state will show different forms of failure.

The defect data collected by a single detection method cannot fully reflect the overall characteristic state of the casing. At the same time, the characteristic parameters caused by different types of fault defects may also affect each other, resulting in a decrease in the reliability of casing monitoring.

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