FPGA-based sample data interface circuit for electronic mutual inductor

Abstract

The invention discloses an FPGA-based sample data interface circuit for an electronic mutual inductor, in particular to receiving, decoding and storing of the sample data of the electronic mutual inductor. The sample data interface circuit comprises a photoelectric conversion circuit, an FPGA chip and a memory chip which are sequentially connected together, wherein the FPGA chip comprises a phase-locked loop module, a serial data receiving module, a decoding module and a memory module; the serial data receiving module receives serial data and then transfers the serial data to the decoding module; the decoding module checks the serial data, decodes the serial data according to a prescribed format, and then transfers the serial data to the memory module; the memory module stores the decoded data in a specified position of the memory chip; and the phase-locked loop module respectively provides clock signals for the serial data receiving module, the decoding module and the memory module. The FPGA-based sample data interface circuit adopts asynchronous serial transmission for the high-speed digital sampling data transmitted by the electronic mutual inductor, and can flexibly configure sampling rate and baud rate, can programme logic, and has the advantages of digitization, high adaptability and high expansibility.

Description

technical field [0001] The invention belongs to the field of electric power system automation, and in particular relates to the receiving, decoding and storing of electronic transformer sampling data. Background technique [0002] With the development of computer technology and digitalization of secondary equipment in power systems, it has been difficult for traditional electromagnetic current and voltage transformers to directly complete the digital processing of complete information on current and voltage. The electronic current and voltage transformer, the secondary output is a small voltage signal, without secondary conversion, it can be easily interfaced with digital instruments and microcomputer protection and control equipment to realize the functions of metering, control, measurement, protection and data transmission, and Eliminates the potential failure of traditional electromagnetic current transformers caused by secondary open circuits and secondary short circuits...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the MCU or DSP processing unit of the electronic transformer in the prior art cannot complete the serial data reception of the high-speed baud rate due to reasons such as processor speed and real-time performance

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