Comprehensive detecting and analyzing platform for performance of digital electric energy metering systems of intelligent transformer substations

Abstract

A comprehensive detecting and analyzing platform for performance of digital electric energy metering systems of intelligent transformer substations is provided with a detecting system and a background expert system. The detecting system comprises an electronic transformer detecting system, a digital / digital-value-input electric energy meter detecting system and a digital electric energy metering comprehensive performance detecting system. By the background expert system, real-time monitoring and value tracing can be simultaneously carried out for electronic / optical current transformers, electronic voltage transformers, digital / digital-value-input electric energy meters and the like, and electric energy data of analog systems and multiple digital systems can be compared and analyzed so that the comprehensive performance of each digital electric energy metering system is detected. Detection results are comprehensive owing to multiple signal acquisition channels and comprehensive consideration on metering risk points of the systems, and the comprehensive detecting and analyzing platform is beneficial to improving metering accuracy for the intelligent transformer substations and digital transformer substations, and provides a good technical support for constructing the intelligent transformer substations and the digital transformer substations.

Description

technical field [0001] The invention belongs to the technical field of measurement and detection of intelligent substations in power systems, and relates to a detection and analysis technology for a digital electric energy measurement system of an intelligent substation, specifically a performance comprehensive detection and analysis platform for a digital electric energy measurement system of an intelligent substation. Background technique [0002] Smart substation is an indispensable and important part of smart grid construction. At present, the development of smart substation and digital substation has entered the stage of large-scale engineering application. It has begun to be widely used in the power system, and the digital electric energy metering system has also been established. The detection of digital metering can no longer be detected simply according to the transmission of analog quantities. [0003] The risk points that digital measurement may affect the accurac...

AI Technical Summary

Problems solved by technology

However, there are still relatively few applications of digital electric energy metering in the world, so there is no research on the traceability of digital electric energy metering and detection comparison analysis. In the field of laboratory testing of digital measurement, it still stays in the offline single detection stage of electronic transformers and digital input electric energy meters established according to the traditional analog measurement system, that is, electronic transformer detection, digital electric energy meter detection, etc., while The impact of the digital measurement system that we should be most concerned about is basically out of reach, and the comprehensive comparison analysis system has already had some measurement comparisons on site, mainly reflected in the comparison of the results between the digital measurement system and the traditional measurement system

Therefore, the overall traceability detection verification and performance comprehensive analysis of the digital metering system have not yet been established, which cannot reflect the real error points of the digital metering, and all the metering and testing processes are uncontrollable, which brings the digital energy metering of smart substations. great danger

[0004] The metering system of a conventional substation is composed of sub-equipment. Its technical principles are mature, and the metering risk points are also within the controllable range. However, the digital metering system is currently in the analysis of error points, temperature and humidity characteristics of electronic transformers , whether the synchronization of current and voltage meets the accuracy requirements of measurement, and the impact of abnormal digital links on measurement accuracy have not yet been answered.

This has become a problem that cannot be solved in the traceability process of digital metering, and has become the biggest obstacle restricting the development of smart substations and digital substations.

Now all digital measurement adopts offline single detection and analysis methods, which are essentially analog or digital standard sources for discrete detection and analysis of digital quantities, which cannot satisfy the overall traceability of our digital measurement system at all. And the requirements of comprehensive performance analysis

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