Communication method of serial real-time bus special in electricity

A real-time bus and communication method technology, applied in the field of communication, can solve the problems of implementation complexity and failure to meet power relay protection, etc., and achieve the effects of reducing crosstalk, improving upper-layer applications, and accelerating data transmission rates

Active Publication Date: 2010-10-20
STATE GRID ELECTRIC POWER RES INST
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  • Abstract
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Problems solved by technology

However, the complexity, real-time performance and reliability of the above-mentioned serial data bus standards cannot meet the transmission req

Method used

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  • Communication method of serial real-time bus special in electricity
  • Communication method of serial real-time bus special in electricity
  • Communication method of serial real-time bus special in electricity

Examples

Experimental program
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Example Embodiment

[0042] The present invention will be further described below with reference to the drawings and embodiments.

[0043] For different application fields, the following two embodiments of power-specific real-time data serial bus communication methods are respectively proposed:

[0044] 1. An embodiment of protecting the data transmission channel in the AC high voltage protection hardware platform

[0045] In this embodiment, the method is adopted to realize the channel of digital longitudinal synchronous communication. The digital longitudinal synchronous communication channel is an important part of the optical fiber differential protection device. It mainly undertakes two parts of work. One is to provide a reliable transmission channel for sampling values ​​such as current and voltage; the other is to provide time information to synchronize data sampling on both sides Foundation.

[0046] Taking into account the reliability, stability and simplicity of the protection device research a...

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Abstract

The invention discloses a communication method of serial real-time bus special in electricity, comprising the following steps that: 1) a line coding of a physical layer adopts a CMI signal inversion code or a 4B5B coder and decoder for receiving and dispatching serial data, and the receiving end adopts a digital phase-locked loop to extract clock from the received code stream; 2) a link layer adopts a HDLC of high-level data link control protocol to achieve the generation of the data frames, the check of the CRC hardware and the sign of the temporal information; 3) an interface control layer realizes the interconnection interface with an upper layer DSP or a processor such as a CPU and the like, mounts the transmission channels on the external bus of the processor, and expands a pluralityof special serial data bus for the processor, thereby achieving the functions of the buffering of the data, the sending of command control and the receiving of the state feedback. The invention adopts the serial communication technique and the differential signal transmission, and the receiving end extracts the clock automatically with strong disturbance resisting and less generation of error code.

Description

technical field [0001] The present invention relates to a communication method, in particular to a communication method of a dedicated serial real-time bus for electric power, which can be implemented based on FPGA hardware and is suitable for transmission of various real-time data in the power industry such as relay protection, measurement monitoring, safety and stability, etc. belongs to the field of communication. Background technique [0002] Communication technology is widely used in various fields such as relay protection, measurement monitoring, security and stability in the power industry. The power system has high requirements for the reliability and real-time performance of data transmission. In the past, due to cost and technical problems, the data communication in power equipment was transmitted by power line carrier, and the amount of information that can be transmitted and the reliability are both Not high, and the communication mode is not flexible. [0003]...

Claims

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Application Information

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IPC IPC(8): H04L1/00
Inventor 郭经红徐建松马媛媛邓辉喻强于鹏飞
Owner STATE GRID ELECTRIC POWER RES INST
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