WO2000003262A3 - Improvements relating to electrical power measurement - Google Patents

Improvements relating to electrical power measurement Download PDF

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Publication number
WO2000003262A3
WO2000003262A3 PCT/GB1999/002189 GB9902189W WO0003262A3 WO 2000003262 A3 WO2000003262 A3 WO 2000003262A3 GB 9902189 W GB9902189 W GB 9902189W WO 0003262 A3 WO0003262 A3 WO 0003262A3
Authority
WO
WIPO (PCT)
Prior art keywords
instantaneous
electrical power
power
signal
vic
Prior art date
Application number
PCT/GB1999/002189
Other languages
French (fr)
Other versions
WO2000003262A2 (en
Inventor
Foroozan Ghassemi
Original Assignee
Electric Power Res Ltd
Foroozan Ghassemi
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Electric Power Res Ltd, Foroozan Ghassemi filed Critical Electric Power Res Ltd
Priority to AT99929600T priority Critical patent/ATE460675T1/en
Priority to DE69942118T priority patent/DE69942118D1/en
Priority to AU46381/99A priority patent/AU4638199A/en
Priority to US09/508,136 priority patent/US6828771B1/en
Priority to EP99929600A priority patent/EP1019737B1/en
Publication of WO2000003262A2 publication Critical patent/WO2000003262A2/en
Publication of WO2000003262A3 publication Critical patent/WO2000003262A3/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R21/00—Arrangements for measuring electric power or power factor
    • G01R21/133—Arrangements for measuring electric power or power factor by using digital technique
    • G01R21/1331—Measuring real or reactive component, measuring apparent energy

Abstract

An electric power meter (1,201) is described which implements a method of measuring the value of an electrical power parameter, such as Universal Apparent Power or Universal Power Factor, of an electrical power signal. The method is implemented in the time domain and comprises: calculating a first instantaneous power compenent (pp(t)) as the product of an instantaneous voltage signal (vva, vvb, vvc) of the electrical power signal and an instantaneous current signal (via, vib, vic) of the electrical power signal, carrying out a relative phase shift between the instantaneous voltage signal (vva, vvb, vvc) and the instantaneous current signal (v,ia, vib, vic; and calculating a second instantaneous power component (pq(t)) as the product of the relatively phase-shifted instantaneous voltage and instantaneous current signals (via, vib, vic). The first and second instantaneous power components (pp(t), pq(t)) are then RMS averaged to determine their respective magnitudes. Both of the calculated magnitudes are then used to determine the value of the electrical power parameter. The method can alternatively be implemented in the frequency domain to produce equivalent measurement values.
PCT/GB1999/002189 1998-07-08 1999-07-08 Improvements relating to electrical power measurement WO2000003262A2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AT99929600T ATE460675T1 (en) 1998-07-09 1999-07-08 DEVICE AND METHOD FOR ELECTRICAL POWER MEASUREMENT
DE69942118T DE69942118D1 (en) 1998-07-09 1999-07-08 DEVICE AND METHOD FOR ELECTRICAL PERFORMANCE MEASUREMENT
AU46381/99A AU4638199A (en) 1998-07-08 1999-07-08 Improvements relating to electrical power measurement
US09/508,136 US6828771B1 (en) 1998-07-08 1999-07-08 Electrical power measurement
EP99929600A EP1019737B1 (en) 1998-07-09 1999-07-08 Method and apparatus for electrical power measurement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9814793.7 1998-07-08
GBGB9814793.7A GB9814793D0 (en) 1998-07-09 1998-07-09 Power meter for ac electrical systems

Publications (2)

Publication Number Publication Date
WO2000003262A2 WO2000003262A2 (en) 2000-01-20
WO2000003262A3 true WO2000003262A3 (en) 2002-07-04

Family

ID=10835154

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1999/002189 WO2000003262A2 (en) 1998-07-08 1999-07-08 Improvements relating to electrical power measurement

Country Status (7)

Country Link
US (1) US6828771B1 (en)
EP (1) EP1019737B1 (en)
AT (1) ATE460675T1 (en)
AU (1) AU4638199A (en)
DE (1) DE69942118D1 (en)
GB (1) GB9814793D0 (en)
WO (1) WO2000003262A2 (en)

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US7298129B2 (en) * 2005-11-04 2007-11-20 Tektronix, Inc. Time arbitrary signal power statistics measurement device and method
US20080040296A1 (en) * 2006-08-10 2008-02-14 V2 Green Inc. Electric Resource Power Meter in a Power Aggregation System for Distributed Electric Resources
EP2227700A2 (en) * 2007-12-26 2010-09-15 Greenlet Technologies Ltd. Reducing power consumption in a network by detecting electrical signatures of appliances
US8014964B1 (en) * 2008-08-23 2011-09-06 Khalsa Research and Consultancy Pty Ltd Electrical power and energy measurement method and apparatus
KR101004147B1 (en) * 2010-04-02 2010-12-27 한국전력공사 Bidirectional 3 phase power meter for compensating reverse load flow and method thereof
US8907655B2 (en) 2011-04-29 2014-12-09 Analog Devices, Inc. System and method for detecting a fundamental frequency of an electric power system
US8868364B2 (en) * 2011-04-29 2014-10-21 Analog Devices, Inc. Apparatus and method for real time harmonic spectral analyzer
US8907658B2 (en) 2012-04-19 2014-12-09 Kohler, Inc. System and method of measuring power produced by a power source
CN102735922B (en) * 2012-07-04 2014-07-23 江苏林洋电子股份有限公司 Low-cost single-phase harmonic electric energy meter
TWI489124B (en) 2012-07-26 2015-06-21 Delta Electronics Inc Obtaining method for electric power information
CN103575955B (en) * 2012-07-26 2016-03-16 台达电子工业股份有限公司 The acquisition methods of power information
WO2015016949A1 (en) * 2013-08-02 2015-02-05 Schneider Electric Usa Inc. Systems and methods for measurement equivalency
US9547025B2 (en) 2013-09-03 2017-01-17 Fabriq, Ltd. Apparatus and method for automatic power metering
DE102015203649A1 (en) * 2014-08-12 2016-02-18 Rohde & Schwarz Gmbh & Co. Kg Power meter with two detector elements for power measurement even of very small frequencies
US9932203B2 (en) * 2015-07-31 2018-04-03 Inventio Ag Method and device for detecting a deterioration state of a load bearing capacity in a suspension member arrangement for an elevator
CN106771552B (en) * 2016-12-02 2019-08-27 国网四川省电力公司电力科学研究院 A kind of distortion power metering method
CN107677884A (en) * 2017-08-01 2018-02-09 中国电力科学研究院 A kind of method and system for being used to measure the electric energy of three-phase three-line system
US10613126B2 (en) * 2018-01-09 2020-04-07 Eurotherm Limited Method to determine three-phase load impedances driven by a power control device when no neutral reference is available in an alternative electrical network
WO2023212280A1 (en) * 2022-04-29 2023-11-02 Aclara Technologies Llc Systems and methods for estimating neutral impedance and detecting faulted neutral connection in an electrical meter

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Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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US5212441A (en) * 1992-02-25 1993-05-18 Basic Measuring Instruments, Inc. Harmonic-adjusted power factor meter
EP0660120A1 (en) * 1993-12-23 1995-06-28 ELECTREX S.r.L. A method for the digital electronic measurement of periodic electrical quantities, and an instrument for the implementation of such a method

Non-Patent Citations (4)

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Title
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Also Published As

Publication number Publication date
WO2000003262A2 (en) 2000-01-20
US6828771B1 (en) 2004-12-07
EP1019737A2 (en) 2000-07-19
DE69942118D1 (en) 2010-04-22
EP1019737B1 (en) 2010-03-10
ATE460675T1 (en) 2010-03-15
AU4638199A (en) 2000-02-01
GB9814793D0 (en) 1998-09-09

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