Method and device for acquiring networking transmission network time delay of sampling value of intelligent transformer substation

Abstract

The invention provides a method for acquiring the networking transmission network time delay of the sampling value of an intelligent transformer substation. The sampling value is transmitted in the form of a message. The method comprises the following steps: initializing the filling value of a message reservation field into 0; allowing the message to enter a switch for performing network transmission, and recording an entrance time point at which the message enters the current switch and a transmission time point at which the message leaves the current switch respectively; acquiring the retention time of the message in the current switch, overlapping the retention time with data in the reservation field, and replacing the data in the reservation field; judging whether the message arrives at a target position or not, and if so, carrying out a next step; otherwise, searching for a next switch and returning; and acquiring data in the reservation field to obtain a total network time delay value. The invention further relates to a device for implementing the method. The method and the device for acquiring the networking transmission network time delay of the sampling value of the intelligent transformer substation have the beneficial effects that networking transmission can be performed in asynchronous sampling, and the network time delay can be determined.

Description

technical field [0001] The invention relates to the field of substation control, in particular to a method and a device for acquiring time delay of a network transmission network of sampling values ​​of an intelligent substation. Background technique [0002] At present, there are two transmission methods for the sampling value message of the smart substation: one is network transmission, and the other is point-to-point transmission. Compared with point-to-point transmission, network transmission has the advantages of adopting any topology and data sharing, and it gets rid of the limitations of inflexible physical line connection and difficult expansion of point-to-point transmission. However, the current networking transmission technology requires sampling equipment (such as electronic transformers) to perform synchronous sampling. Since synchronous sampling requires an external high-precision clock for time synchronization, the complexity of the equipment and maintenance c...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide an intelligent substation with asynchronous sampling capable of network transmission and network delay determination in view of the defects of the prior art that asynchronous sampling cannot be networked for transmission and network delay is uncertain Method and device for obtaining time delay of sampling value networking transmission network

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