Hard real-time cascading multi-node synchronous sampling and data transmission method

A data transmission method and synchronous sampling technology, applied in the direction of digital transmission system, transmission system, synchronization device, etc., can solve the problems of channel construction cost and low construction workload

Active Publication Date: 2014-11-05
NANJING PANENG TECHNOLOGY DEVELOPMENT CO LTD
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Problems solved by technology

[0014] In order to overcome the deficiencies and defects of the prior art, the hard real-time cascaded multi-node synchronous sampling and data transmission method of the present invention solves the problem of physical link between a plurality of multi-level cascaded acquisition control nodes with different physical dist

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  • Hard real-time cascading multi-node synchronous sampling and data transmission method

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Embodiment Construction

[0067] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0068] The hard real-time cascaded multi-node synchronous sampling and data transmission method of the present invention solves the problem of extra time between multiple multi-level cascaded acquisition control nodes with different physical distributions due to the length of the physical link and the software protocol stack. Extended to provide hard real-time forwarding capabilities for key business data, such as figure 1 and figure 2 As shown, it specifically includes the following steps:

[0069] Step (1), the cascade system is divided into four levels, including the data processing equipment (hereinafter referred to as DPE) and time server located on the first layer of the system, and the...

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Abstract

The invention discloses a hard real-time cascading multi-node synchronous sampling and data transmission method. The method comprises the following steps: 1) dividing a cascading system into four layers; 2) determining a sampling interval Ts of the cascading system, dividing a physical channel into two logical channels: a real-time logical channel and a non-real-time logical channel; 3) orderly constructing devices in a second layer, a third layer and a fourth layer for synchronous sampling, synchronous transmission and link management in the cascading system; 4) computing a channel retardation of each layer; 5) reconstructing a local synchronous signal of a data combining and transferring device of the third layer, and a local synchronous signal of a data acquisition and control terminal of the fourth layer; 6) controlling data transmission by using sampling period Ts as rhythm. The extra time delay produced by physical link length and software protocol stack among a plurality of multi-stage cascaded acquisition control nodes in different physical distribution is solved, and the hard real-time transfer capability is provided for the key service data, the synchronous precision and real time property are high, the channel construction cost and the construction workload are low, and the good application prospect is realized.

Description

technical field [0001] The invention relates to a hard real-time cascading multi-node synchronous sampling and data transmission method suitable for a plurality of associated nodes scattered far away, and belongs to the technical fields of power system protection and industrial control. Background technique [0002] In the field of power system wide-area protection and wide-area process control, in order to accurately retain the phase information of the signal, or perform precise timing analysis on asynchronous events, it is necessary to collect a certain group of process variables at different locations and at equal intervals. In order to improve the real-time processing capability of the system and the response speed of asynchronous events, the sampling data of each process quantity acquisition and control device can be uploaded in real time, and the command setting information of the processing device needs to be sent to the actuator or adjustment mechanism in real time. S...

Claims

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Application Information

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IPC IPC(8): H04L7/00H04L12/861
Inventor 庞吉耀
Owner NANJING PANENG TECHNOLOGY DEVELOPMENT CO LTD
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