High-voltage electrical energy meter with measurement chips floating at 10 kV potentials

To overcome disadvantages of the conventional electric energy measurement system (CEEMS) in 10 kV distribution network, the study presents a high-voltage electrical energy meter (HVEEM) comprised of signal sensors, two measurement units, a synthesis unit, power supplies, and extended communication d...

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Bibliographic Details
Published in:IET science, measurement & technology measurement & technology, 2016-05, Vol.10 (3), p.159-166
Main Authors: Kang, Bing, Hou, Tiexin, Bu, Zhengliang, Guan, Xiangyu, Shu, Naiqiu, Li, Zipin, Wu, Xiaowen
Format: Article
Language:English
Subjects:
Boards
capacitive voltage divider
conventional electric energy measurement system
distribution network
Electric potential
Energy measurement
extended communication devices
Floating structures
high‐voltage electrical energy meter
measurement chips
measurement units
Measuring instruments
Meters
power distribution reliability
power measurement
power meters
Power supplies
power supply
reliability
signal sensors
synthesis unit
Voltage
voltage 10 kV
voltage dividers
voltage sensor
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Summary:To overcome disadvantages of the conventional electric energy measurement system (CEEMS) in 10 kV distribution network, the study presents a high-voltage electrical energy meter (HVEEM) comprised of signal sensors, two measurement units, a synthesis unit, power supplies, and extended communication devices. With measurement chip circuit boards floating at 10 kV potentials, HVEEM accomplishes electrical energy measurement at the primary side. With the whole structure, HVEEM can be calibrated as a whole, and the synchronisation error makes no difference on its whole error. As the core component, the capacitive voltage divider (CVD) acts as not only the voltage sensor but also the power supply. The stability of CVDs, which is almost not affected by temperature, can be improved by the manner of voltage accelerated ageing for a certain time. CVDs for power supplies are able to output enough power for measurement chip circuit boards even if a single-phase ground or an opening fault occurs. The tests both in the laboratory and the field prove that HVEEM has substantial advantages over CEEMS especially in accuracy and reliability.
ISSN:1751-8822
1751-8830
1751-8830
DOI:10.1049/iet-smt.2014.0280