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Reliable operation of the power transformer is the basis for the security and stability of power system operation. The traditional state evaluation methods for transformer are inadequate, especially in device properties and environmental information. This paper proposed a transformers environmental and properties state evaluation method based on the defects analysis. Firstly, statistics transformer...
Transformer is the key electrical apparatus in power system. The internal partial discharge (PD) of transformers can make insulations suffering chronic erosion and damage. At present, three main methods used for detecting partial discharge are pulse-current method, acoustic method and Ultra High Frequency (UHF) method. However, the monitoring accuracy will be affected significantly by invalid partial...
Oil-impregnated paper bushing (OIP) is one of the key devices for power transformers. Recently, some explosion accidents were initiated by bushing invaded by mass moisture, which could destroy the power transformer. In order to study the influence of mass moisture on the characteristics of dielectric loss (tanδ), capacitance and partial discharge (PD) of OIP, a 25kV transparent glass-bushing model...
Oil-impregnated paper bushing (OIP) is one of the key devices for power transformers. Recently, some explosion accidents were initiated by the ingress of air of the condenser core of bushing, which could destroy the power transformer completely. In order to study the influence of ingress of mass air on the characteristics of dielectric loss (taná), capacitance and partial discharge (PD) of OIP, a...
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