Merging unit detection analog source based on synchronous clock signal, and output method thereof

Abstract

An embodiment of the invention discloses a merging unit detection analog source based on a synchronous clock signal, and an output method thereof. A DDS module serves as a main clock signal of a system, and time of a DSP module can be adjusted finely based on extremely high adjustment fineness of the DDS, thereby ensuring synchronicity of output time of the DSP module and a GPS synchronous clock signal; the DSP calculates waveform data in advance by adopting a mathematical algorithm and stores the waveform data in an RAM of the DSP module, so as to achieve transient emission when a synchronous signal arrives; and a power amplification automatic gear shifting module allows analog signals output by the analog source to have multiple gears, thereby achieving high-precision analog current and voltage output of the analog source. According to the merging unit detection analog source and the output method thereof, a merging unit generates an SV message after receiving an analog current-voltage signal; and the a network monitoring analysis merging unit compares time characteristics of the SV message with that of the GPS synchronous clock signal, generates a report on time characteristics of delay time of the merging unit in response to the analog source, and achieves the message output time characteristic test of the merging unit.

Description

technical field [0001] The invention relates to the technical field of electric power system automation, in particular to a detection analog source and output method based on a merging unit under a synchronous clock signal. Background technique [0002] Smart substations play a very important role in the smart grid. Nowadays, with the rapid development of smart grid, the construction of smart grid has sprung up all over the country. Smart substations and digital substations With the extensive application of electronic transformers and merging unit models, merging units have become smart devices in smart substations and digital substations. At present, domestic smart substations generally use SV messages for point-to-point synchronization. The source synchronization signal has nothing to do with protection. Then the sampling value characteristics of the relay protection device completely depend on the time characteristics of the merging unit. Then the output time of the digit...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a method for detecting the analog source and output of the merging unit based on a synchronous clock signal, so as to solve the insufficient time synchronization and lack of accuracy of the test analog source in the delay characteristic test of the merging unit in the prior art question

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