Low delay intelligent substation wireless communication mechanism

A smart substation and wireless communication technology, applied in the field of communication, can solve problems such as reduced network throughput, compatibility limitations, increased installation and debugging work, etc., to improve channel resource utilization, ensure delay stability, and ensure priority The effect of transmission

A smart substation and wireless communication technology, applied in the field of communication, can solve problems such as reduced network throughput, compatibility limitations, increased installation and debugging work, etc., to improve channel resource utilization, ensure delay stability, and ensure priority The effect of transmission

CN109548165AInactive Publication Date: 2019-03-29CHONGQING UNIV OF POSTS & TELECOMM +1
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  • Low delay intelligent substation wireless communication mechanism
  • Low delay intelligent substation wireless communication mechanism
  • Low delay intelligent substation wireless communication mechanism

Examples

Experimental program
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Embodiment Construction

[0040] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0041]A low-latency wireless communication mechanism for smart substations, including fixed time slot allocation based on TDMA and dynamic time slot allocation based on CSMA / CA. The specific performance is: use the TDMA protocol to allocate fixed time slots to all nodes in the communication network by using the periodic fair allocation method according to the business requirements of the substation SV and GOOSE periodic messages, so as to ensure the stability of the end-to-end delay of the periodic messages . In the fixedly allocated time slot, if the channel is idle, the CSMA / CA protocol is used to introduce the aperiodic service whose node priority is blockage and other sudden services or other uncertain services. Nodes compete for idle channels, effectively improving channel utilization, and ensuring the delivery of bursty or random mes...

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Abstract

The invention discloses a low delay intelligent substation wireless communication mechanism. The problem that message transmission delay is instable in an intelligent substation wireless network is mainly solved. The scheme comprises the fact that through utilization of a TDMA protocol, according to SV (Sampled Value) and GOOSE (Generic Object Oriented Substation Event) periodic business requirements of a substation, fixed time slots are allocated to all nodes in a communication network based on a periodic fair allocation method; and when leisure occurs in the fixedly allocated time slots, through utilization of a CSMA / CA protocol and through importing of message priorities, and channels are competed for sudden business such as barring business or other uncertain business. The invention provides a wireless communication mechanism for intelligent substation equipment. According to the low delay intelligent substation wireless communication mechanism based on TDMA and CSMA / CA mixture, delay stability of periodic messages in the intelligent substation wireless network is ensured, transmission of sudden messages is ensured, and a channel utilization rate is improved.

Description

technical field [0001] The invention belongs to the communication field, and in particular relates to a low-delay smart substation wireless communication mechanism, which is suitable for smart substation wireless networking scenarios, allocates time slots according to substation message conditions, and ensures stable time delay requirements. Background technique [0002] The smart substation based on the IEC61850 standard mainly transmits GOOSE (Generic Object Oriented Substation Event) messages, SV (Sampled Value, transmission sampling) messages and MMS (Manufacturing Message Specification) messages. According to the message types, there are periodic messages, burst messages, and random messages, among which more than 90% of the periodic messages are real-time messages. The messages transmitted between the secondary equipment of the substation have a clear subscription relationship, and the maximum transmission rate of data messages must reach 250kbit / s. [0003] The trans...

Claims

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Application Information

Patent Timeline
29 Mar 2019
Publication
CN109548165A
IPC
H04W74/02
CPC
H04W74/02
Inventors
彭大芹; 林虹