Centralized timing system for automatic electric energy meter calibration devices

Abstract

Embodiments of the invention provide a centralized timing system for automatic electric energy meter calibration devices. The system comprises a standard clock signal source, a frequency division andshaping device, a transmission device and a reception device, wherein the standard clock signal source sends a standard clock signal to a frequency division and shaping module; the frequency divisionand shaping module generates the received constant-temperature standard clock signal into multiple paths of standard clock signals and sends the multiple paths of standard clock signals to a transmission module; the transmission module isolates and converts the received multiple paths of standard clock signals into differential clock signals and sends the differential clock signals to the reception device; and the reception device converts the received differential clock signals into multiple paths of standard clock signals and transmits the multiple paths of standard clock signals to clock systems of a plurality of calibration devices. According to the system, the timing of the plurality of connected calibration devices is completed through uniform multiple paths of standard clock signals, so that the quantity of the timing systems is decreased and the time uniformity and timing correctness of the calibration devices are improved.

Description

technical field [0001] This application relates to the time accuracy of electrical equipment with high clock requirements in the power monitoring system, and in particular to a centralized time service system for automatic verification devices of electric energy meters. Background technique [0002] Electric energy measuring instruments are a "scale" for electric energy measurement and trade settlement, and their accuracy is the basis for ensuring fair and just trade settlement. Electric energy meters are an important part of government quality supervision, are the interests of power customers across the country, and are also a tangible manifestation of the professional standards and social responsibilities of the power supply industry. [0003] With the comprehensive construction of the electricity information collection system and the implementation of tiered electricity prices, both industrial electricity and domestic electricity have put forward higher requirements for t...

AI Technical Summary

Problems solved by technology

[0005] Although the distributed time service system can temporarily meet the requirements of the automatic verification device of the electric energy meter, its shortcomings are also constantly highlighted in the application process, mainly reflected in the following aspects: 1. The economic cost remains high; 2. In the verification device In the verification work of the electric energy meter, the accuracy and uniformity of the electric energy meter are difficult to meet

In the distributed timing system, each verification device is equipped with a clock system, which needs to be sent to the inspection clock system at the same time during the inspection process, thus increasing the complexity of the inspection process

Every time a clock system fails to pass the inspection, it will lead to the failure of the verification device matched with it.

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