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Synchronization method and system for multi-source asynchronous sampling mixed data in distribution network

A technology of asynchronous sampling and mixed data, which is applied in the direction of emergency protection data processing devices, AC network circuits, parts of emergency protection devices, etc., can solve the problem of out-of-sync sampling data, and achieve the effect of facilitating data analysis and data integration

Active Publication Date: 2021-04-30
STATE GRID HUNAN ELECTRIC POWER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a synchronization method and system for multi-source asynchronous sampling of mixed data in a distribution network, which is used to solve the technical problem of asynchronous sampling data caused by the inconsistency of the existing distribution network power supply data sampling equipment

Method used

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  • Synchronization method and system for multi-source asynchronous sampling mixed data in distribution network

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Embodiment 1

[0040] This implementation discloses a synchronization method for multi-source asynchronous sampling of mixed data in a distribution network, including the following steps:

[0041] Receive multi-source asynchronous sampling data from multiple different devices; combined with the local clock, the multi-source asynchronous sampling data is processed for validity discrimination, sampling time restoration processing, sampling time synchronization processing, and sampling value interpolation processing, and multi-source asynchronous sampling Fits the data to synchronously sampled data at the specified frequency.

[0042] A computer system includes a memory, a processor, and a computer program stored in the memory and operable on the processor. When the processor executes the computer program, the steps of any of the above-mentioned methods are realized.

[0043] The synchronization method and system for multi-source asynchronous sampling mixed data in the distribution network in t...

Embodiment 2

[0045] Such as figure 1 As shown, in this embodiment, a synchronization method for multi-source asynchronous sampling of mixed data in a distribution network is disclosed, including the following steps:

[0046] The local equipment collects the local sampling data of the analog quantity on the spot, and sends the analog quantity to the data processor after A / D conversion;

[0047] The data processor receives the local sampling data, and at the same time receives the digital sampling signal from other devices through the optical fiber. Combined with the local clock, after data validity judgment, sampling time restoration, sampling time synchronization, sampling value interpolation and other operations, the fitting is Sampling data at a specified frequency, so that the data processor can perform data analysis or data integration, wherein the data analysis can be fault detection, or the data processing can be forwarded to other equipment through optical fiber.

[0048] Specifica...

Embodiment 3

[0069] Embodiment 3 is an extended embodiment of Embodiment 2, specifically including the following:

[0070] by figure 2 For example, a distribution network branch line device collects the line interval current on the spot, receives the point-to-point 9-2 data sampling sent by the bus PT (voltage transformer) merging unit, and simultaneously receives the longitudinal HDLC data signal from the opposite side of the line ;

[0071] Among them, the task terminal period of the device is 0.833ms, the sampling rate is 4.8kHz, the sampling rate of 9-2 data is 4kHz, and the longitudinal light difference data is 1.2kHz. After synchronization, the data is reconstructed into 1.2kHz data for the protection function of this device. .

[0072] to attach figure 1 Steps as an example:

[0073] First, the 9-2 sampling data received through the optical fiber port of the LC is marked with the local clock to receive the message T 5 ~T 24 , the received HDLC differential sampling data is ma...

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Abstract

The invention discloses a synchronization method and system for multi-source asynchronous sampling mixed data in a distribution network. The method comprises the following steps of: receiving multi-source asynchronous sampling data from a plurality of different devices; and in combination with a local clock, performing validity discrimination processing, sampling moment reduction processing, sampling moment synchronization processing and sampling value interpolation processing on the multi-source asynchronous sampling data, and fitting the multi-source asynchronous sampling data into synchronous sampling data with a specified frequency, thereby realizing synchronization of the multi-source asynchronous sampling mixed data. And subsequent data analysis and data integration are facilitated. And the problems of limited space, many intervals, large data volume and complex wiring in the application of the power distribution network are solved.

Description

technical field [0001] The invention relates to the technical field of data synchronization of distribution network sampling, in particular to a synchronization method and system for multi-source asynchronous sampling mixed data in a distribution network. Background technique [0002] In the traditional power system protection and control equipment, the analog quantity of the local transformer is sampled, converted to a fixed frequency sampling sequence through A / D, and the frequency, assignment, phase and other information are obtained through the Fourier algorithm, which is limited by the conventional transformer, that is, the filter Due to the influence of the loop, the local sampling frequency is mostly 1.2kHz, 1.6kHz and other sampling frequencies. With the development of electronic transformers in digital substations and the special digital data format IEC60044-8 and IEC61850-9 suitable for high-speed sampling optical fiber transmission The development of the -2 protoc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02H1/00
CPCH02H1/0092H02J3/00H02J2203/10
Inventor 唐海国朱吉然张帝张志丹邓威游金梁康童彭涛齐飞周恒逸赵邈刘海峰唐云任磊李红青
Owner STATE GRID HUNAN ELECTRIC POWER
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