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A method for sending and receiving merging unit point-to-point sv messages

A point-to-point, message sending technology, applied in the direction of electrical components, digital transmission systems, data exchange networks, etc., can solve the problems of SV message uniformity and low reliability, and achieve the effect of improving stability and reliability

Active Publication Date: 2018-11-09
XUJI GRP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention proposes a point-to-point SV message sending and receiving method of a merging unit, aiming to solve the problem that the uniformity and reliability of the SV message sending and receiving method of the merging unit point-to-point SV message sending and receiving method in the prior art are not high

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  • A method for sending and receiving merging unit point-to-point sv messages
  • A method for sending and receiving merging unit point-to-point sv messages

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Experimental program
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Embodiment Construction

[0025] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in detail:

[0026] The realization principle of the whole system is as follows figure 1 As shown, it is mainly composed of CPU, FPGA and DM9000C. CPU performs data interaction with FPGA through the bus, and FPGA drives DM9000C to send and receive messages through the data interface of DM9000C. FPGA is the core part of the system implementation. A 32-bit timer is built inside the FPGA. The constant temperature crystal oscillator provides a stable and reliable clock for the timer. The clock is multiplied by the internal DCM to 100Mhz. The minimum resolution of the timer can reach 10ns, which ensures the accuracy and reliability of the system. .

[0027] The system parses the external synchronous time information through the FPGA, and parses it into the second pulse and UTC time information, and the second pulse of each second is time stamped by the timer of the FPGA. ...

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Abstract

The invention relates to a merging unit point-to-point SV message receiving-sending method. The method comprises the following steps: packaging SV messages with the high operational capability of a CPU (Central Processing Unit); periodically inquiring whether or not messages exist in an FPGA (Field Programmable Gate Array) sending buffer area; if the messages exist, resolving message sending time, calculating message sending waiting time according to the message sending time and time needed for sending a frame of message, and sending the messages out after waiting for a period of time, wherein the waiting time is short; otherwise, inquiring whether or not messages exist in a DM9000C receiving buffer area; and if the messages exist, marking received messages with time stamps through a high-accuracy timer of an FPGA to realize an SV message point-to-point receiving function. Through adoption of the method, the uniformity and reliability of SV message reception and sending are enhanced greatly.

Description

technical field [0001] The invention belongs to the technical field of electric power system substation intelligent network, and in particular relates to a method for sending and receiving SV messages of a merging unit point-to-point. Background technique [0002] The merging unit, referred to as MU, is a device that combines and synchronizes the electrical quantities transmitted by the primary transformer, and forwards the processed digital signals to the bay layer equipment in a specific format. The merging unit is an interface device for electronic current and voltage transformers. The merging unit realizes the sharing and digitization of process layer data to a certain extent, and it plays a very important role as the data source of the digital substation bay layer and station control layer equipment following the IEC61850 standard. With the promotion and engineering construction of digital substation automation technology, the requirements for the function and performa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/861H04L12/863
Inventor 牟涛周水斌郑拓夫赵应兵马仪成刘晓霞
Owner XUJI GRP