Current transformer secondary circuit monitoring module and method, and specific transformer acquiring terminal

Abstract

The invention discloses a current transformer secondary circuit monitoring module and method, and a specific transformer acquiring terminal. The monitoring module comprises: a first communication unit which communicates with a second communication unit in the specific transformer acquisition terminal; a current detection unit which detects the load current of the current transformer secondary circuit; a signal applying unit which applies a high-frequency voltage signal to the current transformer secondary circuit; a resonant unit which resonates when the high-frequency voltage signal is applied to the current transformer secondary circuit; an inverter which constitutes a self-excited oscillation circuit with the resonant unit; a micro-control unit which realizes data acquisition, flow control and signal control. The current transformer secondary circuit monitoring module and method, and the specific transformer acquiring terminal, based on the impedance characteristic of the current transformer secondary circuit, realize the normal connection, open circuit, and short circuit of the current transformer secondary circuit, and the state monitoring of a short-circuit electric energy meter.

Description

Technical field [0001] The invention relates to the technical field of electric energy measurement, in particular to a current transformer secondary loop monitoring module and method, and a special transformer collection terminal. Background technique [0002] Electricity theft refers to the illegal occupation of electric energy, the purpose of not paying or under paying electricity fees, and the use of illegal means to not meter or under meter electricity. The electric energy measurement system mainly includes three parts: transformer, secondary circuit and electric energy meter. Among them, electric energy meters have been basically popularized as smart meters in recent years. They have functions such as strong magnetic interference, power outages, and open cover monitoring. The function of power stealing; due to the risk of high voltage, the transformer is prone to safety accidents, and the possibility of power stealing is small; the secondary circuit is on the low voltage sid...

AI Technical Summary

Problems solved by technology

Although there are many anti-shunting and stealing products on the market, they are not widely used due to their own reasons.

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