Digital type electric energy meter power consumption measuring device and method

A technology of digital electric energy meter and measuring device, which can be applied in the direction of measuring device, power consumption device, measuring electric power, etc., and can solve the problems of high power consumption and the like

Active Publication Date: 2015-04-29
STATE GRID CORP OF CHINA +2
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a suitable experimental method for the problem that the power consumption of the existing digital electric energy meter itself is generally too large,...

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  • Digital type electric energy meter power consumption measuring device and method
  • Digital type electric energy meter power consumption measuring device and method
  • Digital type electric energy meter power consumption measuring device and method

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Experimental program
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Embodiment Construction

[0039] as attached figure 1 As shown, the entire measurement device is composed of a sampling unit, a signal conditioning unit, a processing and control unit, and an optical fiber data communication interface. The measured digital energy meter is an optical fiber digital energy meter based on the IEC 61850 protocol, powered by AC 220V.

[0040] The sampling unit uses a high-precision voltage transformer and a current sensor to collect the voltage and current signals of the 220V power circuit. The voltage sensor uses a 0.2-level precision voltage transformer. To measure the voltage signal of the power supply circuit of the digital electric energy meter, the current sensor adopts a 0.2S level precision current transformer, the primary input current is 0.01~2A, the secondary output current is 1mA~200mA, and the load capacity is 10Ω, which is used to collect the power supply of the digital electric energy meter under test. loop current signal.

[0041] The collected voltage and ...

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Abstract

The invention discloses a digital type electric energy meter power consumption measuring device and method. An optical fiber data communication interface is adopted to communicate with a measured digital type electric energy meter in real time, in a 'measuring mode' and a 'standby mode' of the digital type electric energy meter, voltage and current signals of a power supply loop of the measured digital type electric energy meter can be acquired in real time, the real-time power consumption value of the measured digital type electric energy meter in the 'measuring mode' and the 'standby mode' can be accurately analyzed by using a rapid Fourier frequency domain conversion technique, and whether the power consumption meets relevant technical requirements can be judged. Compared with a method that only the static power consumption of the electric energy meter is measured by using an ordinary multimeter, the method is relatively high in accuracy, complex wiring and electric shock hazard are avoided, the measuring process is full-automatic, the static power consumption and the dynamic power consumption can be measured in real time, the electric energy quality of an alternative-current power supply of the measured digital type electric energy meter is effectively evaluated, and the energy conservation and the reliable operation of intelligent substation equipment are ensured.

Description

technical field [0001] The invention relates to a device and method for measuring power consumption of a digital electric energy meter. Background technique [0002] In the metering circuit of the smart substation, the electronic mutual inductance realizes the collection, encoding and serial transmission of voltage and current signals. The merging unit frames and packs the sampling sequence, and transmits the sampling data according to the IEC 61850 protocol. The data packets of the merging unit are analyzed and calculated to obtain active energy and reactive energy values. With the comprehensive promotion of smart substations in my country, the digital level of electric energy metering equipment is getting higher and higher. The advantages of high accuracy and powerful functions of digital electric energy meters make it more and more widely used. However, due to the use of optical fiber interface, For components such as Ethernet chips, the power consumption of the digital e...

Claims

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Application Information

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IPC IPC(8): G01R35/04G01R21/00
Inventor 陈浩欧朝龙陈福胜申丽曼李娥英徐先勇王伟能向洁李昂
Owner STATE GRID CORP OF CHINA
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