变压器油纸绝缘套管多参量智能感知技术研究

In recent years, power failures caused by transformer bushing faults directly affect the stable operation of a power grid. How to effectively diagnose bushing faults and realize early warning becomes an important issue to be solved urgently in bushing maintenance. In this paper, a multi-parameter intelligent sensing method for bushings is proposed. A dielectric loss/capacitance/partial discharge integrated wide-frequency sensor is designed, which is suitable for field applications. A new hydrogen/temperature/pressure integrated sensor is designed too. The signals from the sensors are obtained by a low-power multi-channel signal acquisition unit, which can digitize analog signals on site. The optical fibers are used to achieve multi-channel synchronous triggering and high-speed communication, suppressing interference in analog signal transmission. The analysis method based on the vector is proposed and a network-based diagnosis system is realized, which has data fusion and remote alarm function. This paper provides a reference idea for the development of bushing with intelligent operation and maintenance.