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A real-time ring network communication method without packet loss for power system process layer

A technology for power systems and communication methods, applied in transmission systems, digital transmission systems, electrical components, etc., can solve problems such as staying in the millisecond level, unable to meet real-time requirements, and achieve improved reliability, good application prospects, shielding The effect of blank time

Active Publication Date: 2020-07-14
NANJING FENGDAO POWER TECH
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  • Abstract
  • Description
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Problems solved by technology

[0003] The purpose of the present invention is to overcome the problem that the existing power system process layer communication stays at the millisecond level and cannot meet the real-time requirements

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  • A real-time ring network communication method without packet loss for power system process layer
  • A real-time ring network communication method without packet loss for power system process layer

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings of the specification.

[0021] Such as figure 1 As shown, the packet loss-free real-time ring network communication method for the process layer of the power system of the present invention adopts a single ring network topology communication, has a high transmission rate, and improves the real-time performance of the process layer of the power system, and includes the following steps:

[0022] Step (A): Modify the link layer label of the link layer of the service message through the switching device. The modification is based on IEEE 802.1q. Specifically, the TPID field is reserved for the link layer label, and the TCI field is redefined. The TCI field is 16 bits, including the device number of the switching device, the ring network interface port number, and the service message sequence number. The 16 bits of the TCI field are freely allocated according to the actual diameter ...

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Abstract

The invention discloses a packet-loss-free real-time ring network communication method for the process layer of a power system, sampling a single-ring network topology communication, and including the following steps, step (A), linking service messages through switching equipment layer to modify the link layer label; step (B), the switching device will modify the service packets after the link layer label, and forward them to the ring network interfaces of other switching devices connected to it; step (C), in the ring network After the interface receives the service message after the link layer label is modified, it identifies whether the service message is received or rejected by the label, so as to suppress the network storm in the ring network communication loop. The invention has strong real-time performance, realizes zero packet loss in communication, and has a good application prospect in the application of communication between important nodes in the process layer of the power system.

Description

Technical field [0001] The invention relates to the technical field of power system data communication, in particular to a packet loss-free real-time ring network communication method for the process layer of the power system. Background technique [0002] At present, Ethernet has been rapidly promoted in the field of industrial automation due to its wide range of use, low cost, high bandwidth, and mature technology. With the rapid development of digital substations, the process layer communication equipment of the power system is gradually using Ethernet technology for communication. In order to improve the reliability of communication, ring network communication technology has been well applied, such as: Spanning Tree Protocol (STP) ), but the convergence speed of STP is slow, which cannot meet the real-time communication of the process layer. Although the subsequent rapid production tree protocol (RSTP), rapid ring network protection protocol (RRPP) and other ring network tech...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/723H04L12/801H04L45/50
CPCH04L45/50H04L47/13
Inventor 蔡德胜王峰刘家严陈有才邵先锋孙召田尹文堔
Owner NANJING FENGDAO POWER TECH
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