Real-time monitoring system for iron core of large-scale transformer

Abstract

A real-time monitoring system for an iron core of a large-scale transformer belongs to the field of electrical technology and equipment. The technical scheme of the real-time monitoring system is characterized in that: collectors, i.e., leakage current sensors, are installed on grounding bars of an iron core of a large-scale transformer and a reactor and a holder thereof through a fixed liner plate for monitoring leakage currents of the iron core and the holder, a data acquisition cabinet installed on site converts monitored analog signals into digital signals for being displayed on an instrument, at the same time, the digital signals are transmitted to a serial port network server through an RS485 communication cable, then the digital signals are displayed at a monitoring center in real time through a router. The real-time monitoring system of the present invention has the beneficial effects that: occurrence of vicious accidents are avoided, maintenance quality and efficiency can be improved; safe operation of an electric power transformer is effectively ensured, reliability of power supply is improved, and operation cost of an electric power system is reduced; and the real-time monitoring system is stable and reliable, high in precision, good in function, novel in design, compact in structure, advanced in technology, and simple in operation.

Description

technical field [0001] A real-time monitoring system for a large-scale transformer iron core belongs to the field of electrical technology and equipment. Background technique [0002] The winding and iron core of the transformer are the main components for transmitting and transforming electromagnetic energy, and ensuring their safety is the key to the reliable operation of the transformer. During normal operation, the iron core of the transformer needs to be grounded at one point to avoid the discharge of the iron core due to the floating potential. The grounding current of the iron core is very small, about a few mA to tens of mA. Eddy currents will be generated, and the grounding current of the iron core will increase to several amperes or even tens of amperes, which will cause local overheating of the iron core and cause the decomposition of insulating oil, and may also cause the grounding plate to fuse or burn out the iron core, resulting in the suspension of the iron c...

AI Technical Summary

Problems solved by technology

The commonly used monitoring method is that the substation duty personnel use hand-held instruments to regularly detect and record. The biggest disadvantage of this method is that it cannot respond to the fault immediately, and there is a serious hidden danger of further expansion of the accident.

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