Low-tension electricity metering device

Abstract

The invention discloses a low-tension electricity metering device, which comprises a three-phase electricity collection device connected with an electricity displayer. The three-phase electricity collection device comprises a metering chip collection module which conducts analog to digital (AD) conversion to do operation to obtain electrical signals which are stored in a data storage module, dataare selectively output through a microprogrammed control unit (MCU) microcontroller, and a first field bus communication module codes level signals which are transmitted to two buses to transmit. A second field bus communication module of the electricity displayer receiving the signals decodes received bus signals into the level signals to transmit to an upper computer microcontroller to conduct data control and display functions. The low-tension electricity metering device improves traditional low-tension metering devices, enables original current and voltage analog signals for metering secondary circuit to be changed into digital signals for various electric power parameters to be transmitted, and completes data transmission between the three-phase electricity collection device and the electricity displayer through two data lines of the three-phase electricity collection device.

Description

technical field [0001] The invention relates to a low-voltage electric energy metering device. Background technique [0002] The low-voltage metering device has always been the metering method of transformer and electric energy meter from the past to the present, but it has only developed from the original electromagnetic induction type to the electronic electric energy meter used now. The transmission from the transformer to the electronic energy meter is still an analog signal, and this signal transmission method can no longer meet the development requirements of the smart grid. Secondly, signal digitalization is the premise of building smart grid, and it is also the inevitable trend of development. For many years in China, the electric energy meter and transformer of the metering device have been studied as two independent units. In terms of improving metering accuracy, avoiding secondary wrong wiring and preventing electricity theft, only by emphasizing management and f...

AI Technical Summary

Problems solved by technology

For many years in China, the electric energy meter and transformer of the metering device have been studied as two independent units. In terms of improving metering accuracy, avoiding secondary wrong wiring and preventing electricity theft, only by emphasizing management and formulating standards to implement in accordance with the norms, There is no good way to fundamentally solve these problems

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