Distribution transformer neutral-conductor ground current detection warning device

Abstract

The invention provides a distribution transformer neutral-conductor ground current detection warning device which comprises a distribution transformer, a zero-sequence current transformer, an RS-485 bus collector module and a GPRS (general packet radio service) wireless data transmission module, wherein the zero-sequence current transformer is connected with the a neutral-conductor ground terminal of the low-voltage side of the distribution transformer, the RS-485 collector module is connected with the output end of the secondary side of the zero-sequence current transformer, and the GPRS wireless data transmission module is connected with the output end of the RS-485 bus collector module through an RS-485 bus. When increasing, neutral-conductor ground current on the low-voltage-side of the distribution transformer is detected through the zero-sequence current transformer and collected through the RS-485 bus collector module, collected signal information is transmitted to the input end of the GPRS wireless data transmission module through the RS-485 bus, the output end of the GPRS wireless data transmission module uploads the signal information to a computer of a power supply station through a GPRS wireless communication network, detection warning is performed on the neutral-conductor ground current of the distribution transformer, and failure of the neutral-conductor ground current can be repaired timely.

Description

technical field [0001] The invention relates to the field of detection of distribution transformers, in particular to a detection and early warning device for neutral line-to-ground current of distribution transformers. Background technique [0002] At present, in the transformer station area used in the rural power distribution system, a general leakage protector is usually installed as an indirect contact protection, that is, when the insulation breakdown of the electrical equipment causes the metal casing to leak, the charged metal casing of the electrical equipment is closed by the grounding wire. circuit, after the main leakage protector detects the leakage signal, it drives the trip circuit to perform tripping and disconnects the main power supply of the low-voltage line, which plays the role of indirect contact protection. However, this protection method will affect the reliability of power consumption, and cannot prevent problems before they happen, causing frequent ...

AI Technical Summary

Problems solved by technology

However, this protection method will affect the reliability of electricity consumption, and it cannot prevent problems before they happen, resulting in frequent tripping of the line, which directly affects the reliability of electricity consumption of electricity users.

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