Transformer core grounding current monitoring device

Abstract

A transformer core grounding current monitoring device belongs to the field of on-line monitoring technology of transformers. The transformer core grounding current monitoring device comprises a zero-flux high-precision single-turn cross-core current sensor, a monitoring main board, a display unit, a power supply unit and a communication unit, the zero-flux high-precision single-turn cross-core current sensor, the display unit, the power supply unit and the communication unit are connected to the monitoring main board respectively, and the monitoring main board is used to receive a sensing signal of the zero-flux high-precision single-turn cross-core sensor and display the sensing signal locally and send the sensing signal to a remote server through the communication unit. The transformercore grounding current monitoring device can monitor the transformer core grounding current in real time, the monitoring data is sent to the cloud platform server in real time, and the cloud platformserver processes the monitoring data in real time.

Description

technical field [0001] The invention belongs to the technical field of on-line monitoring of power transformation equipment. Background technique [0002] The power transformer is one of the main and expensive equipment in the power system. Its normal operation is an important guarantee for the safe, reliable and economical operation of the power system. When the power transformer is in normal operation, one and only one point of the iron core must be reliably grounded. Once the iron core is grounded at two or more points, the uneven potential between the iron cores will form a circulation between the grounding points, causing the iron core to overheat locally. In severe cases, it will cause partial burning of the iron core, and even fuse the grounding plate, causing the potential of the iron core to float to the ground, causing intermittent breakdown and discharge faults to the ground, and seriously threatening the reliable operation of the transformer and the power grid. ...

AI Technical Summary

Problems solved by technology

At present, on-site operators mainly use clamp ammeters to measure the iron core grounding current. Due to the interference of the strong magnetic field of the transformer, it is difficult to ensure the accuracy and accuracy of the clamp ammeter measurement data, and regular inspections cannot guarantee Timely detection of multi-point grounding faults in the iron core

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