Transformer substation secondary circuit node voltage monitoring device

Abstract

The invention provides a transformer substation secondary circuit node voltage monitoring device. The transformer substation secondary circuit node voltage monitoring device structurally comprises an intelligent terminal and a secondary circuit node voltage acquisition device, wherein the secondary loop node voltage acquisition device comprises a voltage monitoring host and N voltage measurement modules, one end of each voltage measurement module is connected with a corresponding smart terminal, and the other end of each voltage measurement module is connected with the voltage monitoring host; the intelligent terminal comprises an upper-layer terminal, a lower-layer terminal and a divider resistor, the upper end of the divider resistor is connected with the upper-layer terminal, and the lower end of the divider resistor is connected with the lower-layer terminal; and the DC voltage of the important node in the secondary circuit can be monitored in real time, the operation state of the secondary circuit is judged, defects are found, a closed loop is rectified, and technical support is provided for the digitization of the secondary circuit.

Description

technical field [0001] The invention provides a secondary circuit node voltage monitoring device of a transformer substation, which belongs to the technical field of electric power system relay protection. Background technique [0002] With the continuous development of power grid technology, the problem of maintenance of the secondary circuit of traditional substations has become increasingly prominent, which completely cannot meet the needs of lean operation inspection and digital development of substations; at this stage, the protection circuit, operation circuit and signal circuit of the secondary system of traditional AC substations all use DC voltage For power supply, the DC voltage monitoring of important nodes in the secondary circuit can only be reflected by the auxiliary monitoring circuit of the device, and cannot directly reflect the node voltage status; due to the failure of the secondary circuit on site, it was not discovered and dealt with in time, resulting in...

AI Technical Summary

Problems solved by technology

[0007] The present invention proposes a voltage monitoring device for the secondary circuit node of a substation, and its purpose is to solve the problems in the prior art that the terminals of the secondary circuit cannot perform voltage division conversion and the voltage of the secondary circuit node of the substation cannot be monitored.

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