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Baud rate automatic conversion system and method supporting DLT698 protocol

A DLT698, automatic conversion technology, applied in information technology support systems, transmission systems, electrical components, etc., can solve the problems of low success rate of meter reading at the station acquisition terminal and uncertainty of the default baud rate of the smart meter 485 interface, etc. Achieve the effect of enhancing the reliability of power information collection, avoiding bus data loss, and improving the success rate of collection

Inactive Publication Date: 2019-11-12
INSPUR ARTIFICIAL INTELLIGENCE RES INST CO LTD SHANDONG CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical task of the present invention is to provide an automatic baud rate conversion system and method that supports the DLT698 protocol to solve the low success rate of meter reading at the station collection terminal caused by the uncertainty of the default baud rate of the 485 long-distance communication and the 485 interface of the smart meter The problem

Method used

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  • Baud rate automatic conversion system and method supporting DLT698 protocol
  • Baud rate automatic conversion system and method supporting DLT698 protocol
  • Baud rate automatic conversion system and method supporting DLT698 protocol

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Embodiment 1

[0045] as attached figure 1 As shown, the baud rate automatic conversion system supporting the DLT698 protocol of the present invention includes a master station, a station collection terminal, a 485 repeater and a smart meter, the master station and the station collection terminal are connected through Ethernet, and the station collection terminal The terminal is connected to the 485 repeater through the RS-485 interface, and the 485 repeater is connected to the smart meter through the RS-485 interface. The data read from the smart meter is uploaded to the master station regularly through Ethernet.

[0046] Among them, there are multiple 485 repeaters and smart meters, and the 485 repeaters and smart meters are set in one-to-one correspondence; the 485 repeater supports the identification of the 485 interface communication of the station collection terminal by analyzing the low-level duration of the signal rate. The 485 repeater supports the identification of the communicat...

Embodiment 2

[0049] Support DLT698 agreement baud rate automatic conversion method of the present invention, this method is specifically as follows:

[0050] (1), the 485 repeater is powered on and runs, and initializes the 485 bus on the station collection terminal side and the smart meter side;

[0051] (2) The 485 repeater actively sends DLT698.45 data frames to the smart meter at the baud rate of 2400 / 4800 / 9600 to query the address of the meter; if the smart meter replies correctly, it records the current baud rate and sends The 458 bus interface is set to this baud rate;

[0052] (3), 485 repeater and the receiving pin of the drive serial port of the 485 bus on the station acquisition terminal side are set to input interrupt mode, and record the shortest low level of the serial port signal level sent by the station acquisition terminal to the repeater. Time, calculate the baud rate according to 1bit time, and get the baud rate of the serial port on the station acquisition terminal si...

Embodiment 3

[0056] as attached image 3 Shown, the specific implementation steps of the present invention are as follows:

[0057] S1 and 485 repeaters are powered on and run, and initialize the 485 bus on the station collection terminal side and the smart meter side;

[0058] S2, 485 repeaters actively send DLT698.45 data frames to the smart meter at 2400 / 4800 / 9600 baud rate to query the address of the meter;

[0059] S3, judging whether the smart watch replies correctly:

[0060] ①. If the smart meter replies correctly, execute step S4;

[0061] ②. If the smart meter fails to reply correctly, jump to step S2;

[0062] S4. Record the current baud rate, and set the 458 bus interface on the smart meter side to the baud rate;

[0063] S5. Configure the serial port receiving pin on the station collection terminal side as falling edge interrupt mode, start the MCU built-in timer, and wait for the station collection terminal to send the meter reading frame;

[0064] S6, each time a jump f...

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Abstract

The invention discloses a Baud rate automatic conversion system and method supporting a DLT698 protocol, and belongs to the technical field of intelligent power grid electricity information acquisition. The invention aims to solve the technical problem of low meter reading success rate of a station acquisition terminal caused by 485 long-distance communication and uncertainty of default baud rateof a 485 interface of an intelligent electric meter. The adopted technical scheme is as follows: the system comprises a main station, a field station acquisition terminal, a 485 repeater and an intelligent electric meter, wherein the main station is connected with the field station acquisition terminal through the Ethernet; the field station acquisition terminal is connected with the 485 repeaterthrough an RS-485 interface, the 485 repeater is connected with the intelligent electric meter through an RS-485 interface, and the field station acquisition terminal regularly reads intelligent electric meter data supporting a DLT698 protocol through the 485 repeater and regularly uploads the read intelligent electric meter data to the main station through the Ethernet. The invention further discloses a method for automatically converting the Baud rate supporting the DLT698 protocol.

Description

technical field [0001] The invention relates to the technical field of electricity consumption information collection of smart grids, in particular to an automatic baud rate conversion system and method supporting the DLT698 protocol. Background technique [0002] The energy meter at the gateway of the substation is usually collected through the 485 bus by the station acquisition terminal. For the substation of 110KV and above, due to the number of gateway meters, the topological structure of the 485 bus and the electromagnetic environment on site, the success rate of long-distance communication of the 485 bus is low. At the same time, the new standard substation smart meter adopts the DLT698.45 protocol. The protocol requires the smart meter to support 2400 / 4800 / 9600 baud rate, and the station collection terminal cannot judge the default communication rate of 485 of the smart meter by itself. The current actual operation situation is that the communication rate of the smar...

Claims

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Application Information

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IPC IPC(8): H04L29/06H02J13/00
CPCH04L69/08Y04S40/124Y02E60/00
Inventor 王君龙翟西斌于治楼
Owner INSPUR ARTIFICIAL INTELLIGENCE RES INST CO LTD SHANDONG CHINA
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