Method for realizing sampling value synchronization in intelligent substation system

A technology of intelligent substation and sampling value, applied in the field of intelligent substation, can solve problems such as increasing investment, achieve the effect of flexible configuration, saving software workload and improving work efficiency

Inactive Publication Date: 2011-02-23
中国南方电网有限责任公司超高压输电公司柳州局
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Problems solved by technology

[0004] 1) It is necessary to set up an independent synchroni

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  • Method for realizing sampling value synchronization in intelligent substation system
  • Method for realizing sampling value synchronization in intelligent substation system
  • Method for realizing sampling value synchronization in intelligent substation system

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[0026] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0027] see figure 1 Shown, the method flowchart of the present invention comprises:

[0028] Step 101: the protection device monitors the receiving time of each data in real time;

[0029] Step 102: Using a phase-locked loop algorithm to infer the sampling time of each merging unit;

[0030] Step 103: Obtain the information of the sampling time corresponding to the clock of the protection device through a linear interpolation algorithm, so as to realize the synchronization of each sampling value of the protection device and the merging unit.

[0031] A linear interpolation algorithm such as im...

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Abstract

The invention provides a method for realizing sampling value synchronization in an intelligent substation system, which comprises the following steps of: a, monitoring the receiving time of each datum by a protecting device in real time; b, deducing the sampling time of each merging unit with a phase locked loop algorithm; and c, obtaining the information of the sampling time corresponding to the protecting device clock by a linear interpolation algorithm, and realizing the synchronization of the protective device with each sampling value of the merging unit. The invention tracks the receiving time of each datum by using an FPGA (Field Programmable Gate Array) chip, and then deduces the sampling time of each sampling device with the PLL (Phase Locked Loop) algorithm, and further obtains the information of the sampling time corresponding to a receiving device clock by an interpolation or fitting algorithm, thereby realizing the synchronization of the data. The method is performed by hardware, has high precision and strong real-time property, saves the software workload of a secondary device and increases the work efficiency of the secondary device; moreover, the configuration is flexible, the output of data of different sampling rates can be realized, and the reliability of the system is improved.

Description

technical field [0001] The invention relates to the technical field of intelligent substations, in particular to a method for realizing synchronization of sampling values ​​in an intelligent substation system. Background technique [0002] With the development of semiconductor technology, computer technology, and communication technology, technologies including electronic transformers, optical fiber Ethernet, and 100M switches have been widely used in substations. At the same time, the proposal of the smart grid concept also requires that the substation must be intelligentized as soon as possible, so as to improve the reliability and economic indicators of the grid system. Compared with traditional substations, smart substations change the sampling of electrical quantities such as voltage and current from centralized to distributed, that is, the sampling is completed by different devices (merging units, MUs) scattered to different locations (intervals) of the substation. Si...

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Application Information

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IPC IPC(8): H02J13/00
CPCY02E60/723Y04S10/16Y02E60/00
Inventor 潘济猛申狄秋张维
Owner 中国南方电网有限责任公司超高压输电公司柳州局
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