Network transmission delay test method based on delayed dynamic compensation of interchanger

Abstract

The invention discloses a network transmission delay test method based on delayed dynamic compensation of an interchanger. The network transmission delay test method includes the steps of collecting a signal of the primary side of an electronic transformer so as to obtain a first path of signal time mark, sampling a signal output by an optical fiber branching device so as to obtain a second path of signal time mark, collecting a signal output by the network interchanger so as to obtain a third path of signal time mark, carrying out jitter removal on the third path of signal time mark, obtaining the frame jitter time through calculation, obtaining the absolute delay time, output by the interchanger, of the electronic transformer by calculating waveforms and phase positions, and calculating an interchanger time mark error value and frame delay. An analog quantity standard source signal and a digital quantity standard source signal serve as test reference sources, delay measurement accuracy can be largely improved, accurate sequential control over the obtained data can be achieved, and time test accuracy can be effectively ensured. The network transmission delay test method can be widely applied to the field of network transmission tests.

Description

technical field [0001] The invention relates to the technical field of testing, in particular to a network transmission delay testing method based on switch delay dynamic compensation. Background technique [0002] Most of the current smart substation relay protection sampling values ​​adopt the point-to-point sampling mode, but the point-to-point sampling mode increases the hardware difficulty and cost of electronic transformers and relay protection equipment, which seriously restricts the application of smart substation network technology. The effect of sharing has not been well played. [0003] The transition of sampling values ​​of electronic transformers from point-to-point transmission to networked transmission is a development trend. Multiple electronic transformers send sampling values ​​to the process layer transmission network, and intelligent electronic devices that need to use sampling values ​​receive from the transmission network. Single or multiple merging un...

AI Technical Summary

Problems solved by technology

The key to the reliable and stable operation of this scheme is whether the network exchange link can accurately measure and calibrate the delay of each frame of sampled packets. However, the current general test method has large errors, and the test process is complicated. The method of accurate testing of the electronic transformer network transmission cannot accurately understand the network transmission quality of the electronic transformer

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