Onsite multi-dimensional testing method and testing system for digitized interval spanning metering system

Abstract

The invention discloses an onsite multi-dimensional testing method and testing system for a digitized interval spanning metering system. The testing system comprises a remote control analysis host anda local testing terminal, wherein the local testing terminal outputs an analog quantity signal provided by the remote control analysis host to a merging unit to simulate a sampling source signal of the digitized interval spanning metering system, and the local testing terminal establishes a connection with the merging unit of the digitized interval spanning metering system and a digitized electric energy meter in advance; the local testing terminal collects and merges the signals of the merging unit and the digitized electric energy meter; and the remote control analysis host performs multi-dimensional error analysis based on the merged test data. According to the testing system disclosed by the invention, the actual working condition is reproduced and tested by outputting the analog quantity to the merging unit and collecting the same, the establishment is flexible, the test range can be easily adjusted, the safety is improved, the influence of a standard source on the test result isreduced, and the precision is improved; and overall to partial assessment of performance indicators is realized through multi-dimensional error analysis.

Description

technical field [0001] The invention belongs to the field of electric power system intelligent substations, and in particular relates to an on-site multi-dimensional testing method and testing system of a digital cross-interval metering system. Background technique [0002] The smart substation electric energy metering system is composed of transformers, merging units, sampling value transmission network and digital energy meters and other equipment. The digital sampling value transmission method greatly improves the integration and information flexibility of the substation metering system, and has broad application prospects. . The digital measurement scheme in a single interval is simple and clear, and the technology development is relatively mature. However, for cross-interval sampling measurement systems such as inner bridge wiring and three-half wiring, the sampling signals of different intervals cannot be physically combined by referring to the traditional mode. Energ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the power imbalance phenomenon existing in the current inter-interval metering system in the smart substation, the digital metering system involves many links, the on-site commissioning work of the substation cannot be carried out, and the laboratory integrated test environment is difficult to reproduce the actual abnormalities. The present invention provides An on-site multi-dimensional test method and test system for a digital cross-interval metering system to meet the requirements of power system users for the reliability of digital metering in smart substations

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