Fictitious load source for in-situ checking electric energy meter

A technology for simulating load and electric energy, applied in the direction of measuring electrical variables, measuring devices, instruments, etc., to achieve the effect of strong safety protection, complete functions, and easy portability

Inactive Publication Date: 2003-08-13
湖南省电力试验研究所
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention provides technical means to effectively eliminate the problem of unsuitable meter calibration, and develops a simulation load source for on-site calibration of electric energy meters, which is not restricted by power consumption conditions, and can be regularly calibrated on-site operating electric energy meters to ensure The normal development of electrical measurement technology supervision work and the integrity rate of electric energy metering devices, timely elimination and discovery of hidden dangers in metering, improvement of reliability of metering devices, and guarantee of economic interests and legitimate rights and interests of power generation, supply and consumption

Method used

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  • Fictitious load source for in-situ checking electric energy meter
  • Fictitious load source for in-situ checking electric energy meter
  • Fictitious load source for in-situ checking electric energy meter

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Embodiment Construction

[0030] see figure 1 , the electric energy meter on-site verification simulation load source device of the present invention aims at solving the field error verification problem of the electric energy meter when there is no load or a small current load and a low power factor on site. The device is mainly composed of several parts such as voltage zero-crossing comparison, alarm unit, power supply, single-chip microcomputer system, current power amplifier output, current signal phase-shifting amplification, and current protection. The device is provided by an external working power supply of 220V, which is converted into DC ±5V and ±30V through the power supply part to provide working power for the single-chip system, various electronic circuits and current output power amplifiers; in addition, any phase voltage of the terminal boxes A, B, and C of the electric energy metering screen ( The size is 57.7V / 100V / 220V, which can also be output from the meter voltage terminal of the el...

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Abstract

A simulative load source for in-situ calibration of electric energy meter is composed of zero cross voltage comparator, alamr unit, power supply, single-chip microcomputer, phase-shift current amplifier, current power amplifier and its output circuit, and current protecting circuit.

Description

technical field [0001] The invention relates to a power supply and distribution device of a power system, in particular to a current source device for on-site testing of the error of a three-phase electric energy meter running on a power grid. Background technique [0002] Electric energy measurement technology and instruments play a very important role in my country's economic construction. Its accuracy is directly related to power generation, line loss, coal consumption, factory power, power supply, power consumption and other power industries. The correct calculation of technical indicators involves the economic benefits of the country and users. At the same time, the gradual deepening and reform of the power market has put forward higher requirements for electric energy measurement technology and instruments, and more and more attention has been paid to its integrity and accuracy. All electric power enterprises have strengthened the supervisory inspection on the operation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/04
Inventor 罗志坤徐植坚
Owner 湖南省电力试验研究所
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