Power-down processing reliability test device and method for intelligent ammeters in interference environment

Abstract

The invention discloses an automatic power-down processing reliability test device and method for intelligent ammeters in an interference environment. The automatic power-down processing reliability test device comprises an automatic test controller, an inductive load switching device and at least two ammeters to be tested, wherein the automatic test controller is computer equipment which automatic testing software is installed in and is provided with a communication interface. The automatic power-down processing reliability test method comprises the following steps: an input power supply inside a switching device is switched off by controlling the inductive load switching device, a power supply of a paralleling reactor inside the switching device is switched off while the ammeters to be tested which are connected to a switching device voltage loop in parallel are powered down, an inductive load switching interference is generated in a simulated mode, and the inductive load switching interference is output to the voltage loop of the ammeters to be tested through a voltage interface; communication with the ammeters to be tested is conducted through an RS485 interface, operating data of the ammeters to be tested before being powered down and operating data of the ammeters to be tested after being powered up again for operation are detected, so that whether power-down processing of the intelligent ammeters to be tested under the inductive load switching interference is normal is judged, an assessment of the power-down processing reliability of the intelligent ammeters under the interference is realized, and faults are prevented from happening.

Description

[0001] technical field [0002] The invention relates to an automatic test method for the reliability of power-off processing of an intelligent electric energy meter in an inductive load switching interference environment, and belongs to the technical field of intelligent electric energy meter detection. Background technique [0003] The smart energy meter will be affected by various interference stresses in the on-site network, especially the power circuit of the energy meter and the RS485 communication circuit, which are the main channels for various interferences to enter the logic board of the energy meter. Although the power supply of the energy meter and the RS485 port are usually isolated by an isolation transformer or a photoelectric conversion chip, due to the presence of distributed capacitance and coupling inductance, some pulse interference with a steep rising edge can easily pass through these isolations through distributed capacitance and coupling inductance. Wh...

AI Technical Summary

Problems solved by technology

If the smart energy meter is disturbed during power failure, it may cause abnormal power failure signal or stored data, resulting in malfunction of the smart energy meter

Since the impact of this interference on the power failure of the smart energy meter is uncertain, the probability of this kind of failure is very low, and it is difficult to detect it by general detection methods

But once a fault occurs, the consequences are unpredictable, and subsequent fault analysis is also very difficult

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