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Method for generating multi-interval message acquisition time of intelligent transformer station

A technology of smart substation and collection time, which is applied in the direction of electrical components, digital transmission systems, transmission systems, etc., can solve the problems that data analysis has a great influence and the collection time cannot be guaranteed, and achieve the effect of improving accuracy

Active Publication Date: 2015-07-01
NINGXIA ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Now substations mostly use B (IRIG-B) code access. B code uses 100 code elements to represent time, and each code element is 10ms. In the case of non-integral seconds, because of hardware and algorithms, the acquisition time cannot be guaranteed. , in fact, there is a difference of more than 100us, which has a great influence on the later data analysis

Method used

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  • Method for generating multi-interval message acquisition time of intelligent transformer station
  • Method for generating multi-interval message acquisition time of intelligent transformer station
  • Method for generating multi-interval message acquisition time of intelligent transformer station

Examples

Experimental program
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Effect test

Embodiment 1

[0016] This example uses FPGA chip EP4CGX150, which has 150K logic units, 6.5Mbit memory, 8 high-speed Transceivers, can provide 475 IO ports, and can provide up to 16 independent optical ports, and the working frequency is 125M.

[0017] The realized functions are: the device starts to run when it is powered on, the internal counter and the acquisition of each independent port start to work, and the hardware characteristics of the FPGA chip guarantee the concurrency. When a data packet comes in, a time stamp is generated, time stamped in the PCAP format, and sent to the external processor.

[0018] The performance of this example device is:

[0019] Number of Ethernet monitoring and recording ports: 4;

[0020] Message processing capability when working with a single port: 100Mbps, can access 12 groups of SMV messages or 30 groups of GOOSE messages;

[0021] Total packet processing capacity at full load: 200Mbps;

[0022] According to the actual test, the time accuracy of ...

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Abstract

The invention relates to a method for generating a multi-interval message acquisition time of an intelligent transformer station. The method is characterized by comprising the following steps: a counter in an FPGA (Field Programmable Gate Array) achieves resetting, zero-clearing and counting at the rising edge of exact seconds of B codes, and when a data message comes in, a timestamp is generated and a time stamp is printed on the message. According to the method, labeled sampling is generated by the external time and an internal counter, so that the precision of the sampling time is improved and a guarantee is provided for later data analysis.

Description

technical field [0001] The invention relates to a method for generating multi-interval message collection time of an intelligent substation. Background technique [0002] At present, the power system is vigorously building a smart grid. The substation is developing from a traditional substation to a smart substation. The main features are: the primary equipment is intelligent, the secondary equipment is networked, and it conforms to the IEC61850 standard. That is, the digitalization of information in the smart substation, the networking of information transmission, and the standardization of communication models, so that equipment and functions can share a unified platform. [0003] Smart substations have a large amount of network message data that needs to be monitored and analyzed, especially the analysis of multi-interval messages. The basis of multi-interval message analysis is the time accuracy of multi-interval message collection. Now substations mostly use B (IRIG-B)...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/26
Inventor 黄鸣宇刘海涛栗磊尹亮梁亚波徐丽娟
Owner NINGXIA ELECTRIC POWER RES INST