Electronic transformer angular difference standard device

Abstract

The invention discloses an electronic transformer angular difference standard device. At present, a device capable of accurately and stably transmitting an electronic transformer angular difference isunavailable. The device comprises a fiber optic network port, an Ethernet PHY chip, a synchronization module, a DA module, a field programmable logic gate array FPGA, a micro controller unit MCU, anda man-machine interaction module, wherein the field programmable logic gate array FPGA is used for being communicated with the man-machine interaction module, receiving an instruction transmitted bythe man-machine interaction module, controlling the synchronization module to output a synchronization signal and the PHY chip to output a digital message based on the IEC61850 protocol according to the instruction, configuring the micro controller unit MCU to generate waveform data, receiving and outputting the waveform data generated by the micro controller unit MCU to the DA module and generating a corresponding analog waveform. The device determines delay time of an analog circuit part by recording a time difference between a square signal and the synchronization signal through a high-frequency clock, converts the delay time into the angular difference by data processing and therefore achieves accurate and stable transmission of the angular difference.

Description

technical field [0001] The invention belongs to the field of digital metering devices for intelligent substations, in particular to an electronic transformer angle difference standard device. Background technique [0002] The traditional electronic energy metering system consists of electromagnetic transformers and electronic energy meters. The secondary equipment uses a large number of cables to transmit signals, and there are many error factors. Different from the traditional analog electric energy metering system, the overall structure of the digital electric energy metering system has undergone fundamental changes. The whole system consists of electronic current transformer (ECT), electronic voltage transformer (EVT), merging unit and digital electric energy meter. The electronic transformer (including the merging unit) replaces the traditional electromagnetic transformer, the optical fiber communication replaces a large number of wires and cables, and the electronic ene...

AI Technical Summary

Problems solved by technology

[0004] At present, there is no device that can accurately and stably transmit the angular difference of electronic transformers

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