Integrated high-voltage direct-current electric energy meter

Abstract

The embodiment of the invention discloses an integrated high-voltage direct-current electric energy meter. A load signal is converted into an analog signal through a direct-current large-current measurement module and a direct-current large-voltage measurement module; a digital quantity output conversion module converts the analog signal into a digital signal; a synchronous sampling trigger module sends a synchronous sampling pulse instruction to the digital quantity output conversion module to control synchronous conversion and output of the digital signal; a digital signal processing module carries out digital processing on the digital signal and converts the digital signal into an analog signal again; and finally, a direct-current electric energy metering module meters results. In the prior art, a plurality of split devices are often combined into one system for direct current metering, a merging unit and a far-end module need to perform digital processing, and as a result, time delay is caused in the process, asynchronous voltage and current signal transmission is brought about, and errors are caused to an electric energy metering result are solved; with the integrated high-voltage direct-current electric energy meter of the invention adopted, the above problems can be solved, real-time synchronous transmission of voltage and current signals is ensured, and the possibility of delay is reduced.

Description

technical field [0001] The present application relates to the technical field of electric power measurement, in particular to an integrated high-voltage direct current electric energy meter. Background technique [0002] Direct current, also known as "constant current", the magnitude and direction of direct current do not change with time. DC has a wide range of applications and often exists in DC distribution networks. The DC distribution network provides DC power for the load. In practical applications, an integrated DC energy meter is often used to measure the load voltage and load current in the DC distribution network. [0003] The DC voltage connected to the traditional integrated DC energy meter usually does not exceed 1000V. For DC transmission lines higher than 1000V, electronic voltage transformers, electronic current transformers, merging units, digital energy meters, remote Modules and other split devices are combined into a system for DC metering. Among them,...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that multiple split devices are often combined into one system for DC metering in the prior art, among which, both the merging unit and the remote module need to be digitally processed, and this process will bring delay, resulting in the transmission of voltage and current signals. Not synchronous, which brings errors to the results of electric energy measurement. This application discloses an integrated high-voltage direct current electric energy meter through the following embodiments

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