CA2040282A1 - Method and apparatus for digitally measuring electrical energy consumption - Google Patents

Method and apparatus for digitally measuring electrical energy consumption

Info

Publication number
CA2040282A1
CA2040282A1 CA2040282A CA2040282A CA2040282A1 CA 2040282 A1 CA2040282 A1 CA 2040282A1 CA 2040282 A CA2040282 A CA 2040282A CA 2040282 A CA2040282 A CA 2040282A CA 2040282 A1 CA2040282 A1 CA 2040282A1
Authority
CA
Canada
Prior art keywords
current
time derivative
energy consumption
magnetic field
conductor
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA2040282A
Other languages
French (fr)
Other versions
CA2040282C (en
Inventor
Richard L. Longini
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
VECTORMETRICS Inc
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2040282A1 publication Critical patent/CA2040282A1/en
Application granted granted Critical
Publication of CA2040282C publication Critical patent/CA2040282C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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

Abstract

A method and apparatus for digitally measuring electrical energy consumption from a transmission line carrying alternating current. Instead of actually measuring current from a transmission line conductor, the time derivative of the magnetic field induced by current flowing in the conductor is measured thereby obtaining a reading which is proportional to the time derivative of the current flow. Using an appropriate microcomputer, the time derivative of the magnetic field (the magnetic field rate of change) is represented with an algorithmic series for expressing cyclic phenomena, such as the Fourier series of low order. An approximation of the power consumption is then computed by converting the time derivative of the current as expressed in the algorithmic series and a voltage measurement from the conductor mathematically to a power reading, and the power reading is summed to obtain a number value proportional to the energy consumption. Even harmonics and high frequency harmonics may be eliminated in the algorithmic expression of the current derivative to further simplify computer computations and required hardware, and the magnetic rate of change pickup and the voltage pickup are preferably filtered to remove unwanted noise.
CA002040282A 1990-04-25 1991-04-11 Method and apparatus for digitally measuring electrical energy consumption Expired - Fee Related CA2040282C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US514,255 1990-04-25
US07/514,255 US5061890A (en) 1989-08-07 1990-04-25 Method and apparatus for digitally measuring electrical energy consumption

Publications (2)

Publication Number Publication Date
CA2040282A1 true CA2040282A1 (en) 1991-10-26
CA2040282C CA2040282C (en) 2000-06-06

Family

ID=24046427

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002040282A Expired - Fee Related CA2040282C (en) 1990-04-25 1991-04-11 Method and apparatus for digitally measuring electrical energy consumption

Country Status (5)

Country Link
US (1) US5061890A (en)
EP (1) EP0454360B1 (en)
JP (1) JP3312167B2 (en)
CA (1) CA2040282C (en)
DE (1) DE69126739T2 (en)

Families Citing this family (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5517106A (en) * 1989-08-07 1996-05-14 Digital Kwh, Inc. Method and apparatus for digitally measuring electrical power
FR2662258B1 (en) * 1990-05-17 1992-09-11 Valeo Vision CIRCUIT FOR MEASURING THE INSTANTANEOUS POWER AT THE TERMINALS OF A NON-REACTIVE LOAD LIKE A DISCHARGE LAMP, AND LIGHTING CIRCUIT IN PARTICULAR FOR VEHICLES USING A MEASUREMENT CIRCUIT.
US5298859A (en) * 1992-02-25 1994-03-29 Basic Measuring Instruments Harmonic-adjusted watt-hour meter
US5365164A (en) * 1992-08-24 1994-11-15 Tci (Trans-Coil, Inc.) Harmonic analyzer and methods of constructing and utilizing same
BR9405758A (en) * 1993-02-12 1995-11-28 Ekstroem Ind Inc Apparatus for measuring electricity consumption Apparatus for remote electricity reading Process for measuring electricity supply Process for calculating consumed electricity and Apparatus for remote measuring
US5453697A (en) * 1993-09-09 1995-09-26 Carma Industries Technique for calibrating a transformer element
ES2109848B1 (en) * 1994-05-13 1998-08-01 Consejo Superior Investigacion DEVICE FOR MONITORING THE QUALITY OF SERVICE IN THE SUPPLY OF ELECTRICAL ENERGY AND DETERMINATION OF THE OPTIMAL COMPENSATOR.
US5736847A (en) * 1994-12-30 1998-04-07 Cd Power Measurement Limited Power meter for determining parameters of muliphase power lines
US5650936A (en) * 1994-12-30 1997-07-22 Cd Power Measurement Limited Power monitor apparatus and method with object oriented structure
US6133720A (en) * 1995-11-30 2000-10-17 General Electric Company High speed multifunction testing and calibration of electronic electricity meters
US5673196A (en) * 1995-11-30 1997-09-30 General Electric Company Vector electricity meters and associated vector electricity metering methods
US5642300A (en) * 1996-01-26 1997-06-24 Rotek Instrument Corp. Precision voltage/current/power source
ES2166670B1 (en) * 1999-08-04 2003-02-16 Univ Valencia Politecnica PROCEDURE FOR THE MEASUREMENT OF POWER, ENERGY AND EFFICIENCY IN ELECTRICAL INSTALLATIONS, AS WELL AS THE DEVICE FOR PUTTING INTO PRACTICE.
US6611922B2 (en) 1999-08-09 2003-08-26 Power Measurement, Ltd. Power system time synchronization device and method for sequence of event recording
US6493644B1 (en) 1999-08-09 2002-12-10 Power Measurement Ltd. A-base revenue meter with power quality features
US6798191B1 (en) 1999-08-09 2004-09-28 Power Measurement Ltd. Revenue meter with a graphic user interface being operative to display scalable objects
US6397155B1 (en) 1999-08-09 2002-05-28 Power Measurement Ltd. Method and apparatus for automatically controlled gain switching of monitors
US6615147B1 (en) 1999-08-09 2003-09-02 Power Measurement Ltd. Revenue meter with power quality features
US6825776B2 (en) 1999-08-09 2004-11-30 Power Measurement Ltd. External I/O and communications interface for a revenue meter
US6186842B1 (en) 1999-08-09 2001-02-13 Power Measurement Ltd. Revenue meter bayonet assembly and method of attachment
AU2002339256B2 (en) * 2001-11-19 2007-11-29 Chk Wireless Technologies Australia Pty Ltd Method and apparatus for determining a current in a conductor
US7336065B1 (en) 2003-01-10 2008-02-26 Power Measurement Ltd. Energy device with an extended dynamic range on current readings
US20050240427A1 (en) * 2004-04-26 2005-10-27 Crichlow Henry B Energy management method and process using analytic metrics.
US8352204B2 (en) * 2004-12-21 2013-01-08 Battelle Energy Alliance, Llc Method of detecting system function by measuring frequency response
US8868363B2 (en) * 2009-06-11 2014-10-21 Battelle Energy Alliance, Llc Method of estimating pulse response using an impedance spectrum
US8150643B1 (en) 2004-12-21 2012-04-03 Battelle Energy Alliance, Llc Method of detecting system function by measuring frequency response
US9851414B2 (en) 2004-12-21 2017-12-26 Battelle Energy Alliance, Llc Energy storage cell impedance measuring apparatus, methods and related systems
US7592727B1 (en) 2005-08-01 2009-09-22 The United States Of America As Represented By The Secretary Of The Navy Quiet load for motor testing
US7328114B2 (en) * 2005-12-09 2008-02-05 General Electric Company Methods and systems for measuring a rate of change of frequency
DE102006062750B4 (en) * 2006-09-15 2010-07-08 Infineon Technologies Ag Apparatus for detecting a change in a physical quantity by means of a current conductor structure
US10379168B2 (en) 2007-07-05 2019-08-13 Battelle Energy Alliance, Llc Apparatuses and methods for testing electrochemical cells by measuring frequency response
WO2011140131A1 (en) * 2010-05-03 2011-11-10 Battelle Energy Alliance, Llc Crosstalk compensation in analysis of energy storage devices
FR2991057B1 (en) * 2012-05-24 2014-06-20 Schneider Electric Ind Sas SYSTEM FOR MEASURING ELECTRIC ENERGY, TRANSFORMATION STATION COMPRISING SUCH A SYSTEM AND METHOD FOR MEASURING ELECTRIC ENERGY WITH SUCH A SYSTEM
US10495675B2 (en) 2014-08-28 2019-12-03 Nxp Usa, Inc. Electric power meter
DE102015216981B4 (en) 2014-12-18 2022-07-28 Siemens Aktiengesellschaft circuit breaker
FR3030764B1 (en) 2014-12-22 2018-03-09 Schneider Electric Industries Sas DEVICE AND METHOD FOR MONITORING VOLTAGE OR INTENSITY, SYSTEM FOR MONITORING AN ELECTRICAL BOARD, ELECTRICAL CABINET AND TRANSFORMATION STATION THEREOF
EP3093943B1 (en) * 2015-05-13 2020-08-26 ABB Schweiz AG Method and apparatus for detecting vector shift
US10345384B2 (en) 2016-03-03 2019-07-09 Battelle Energy Alliance, Llc Device, system, and method for measuring internal impedance of a test battery using frequency response
US10656233B2 (en) 2016-04-25 2020-05-19 Dynexus Technology, Inc. Method of calibrating impedance measurements of a battery
US11054481B2 (en) 2019-03-19 2021-07-06 Battelle Energy Alliance, Llc Multispectral impedance determination under dynamic load conditions
US11422102B2 (en) 2020-01-10 2022-08-23 Dynexus Technology, Inc. Multispectral impedance measurements across strings of interconnected cells
US11519969B2 (en) 2020-01-29 2022-12-06 Dynexus Technology, Inc. Cross spectral impedance assessment for cell qualification

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3466431A (en) * 1966-12-30 1969-09-09 Weston Instruments Inc D.c. power spectrum and fourier transform analyzer
US4261038A (en) * 1978-02-28 1981-04-07 National Research Development Corporation Protection of electrical power supply systems
US4491790A (en) * 1980-02-13 1985-01-01 Westinghouse Electric Corp. Electric energy meter having a mutual inductance current transducer
DE3045033A1 (en) * 1980-11-26 1982-07-08 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Measuring time average values - is for improved control response, using digital sampling and continuous integration, within limits
DE3364304D1 (en) * 1982-02-25 1986-08-07 Scientific Columbus Inc Multi-function electricity metering method
US4617636A (en) * 1982-03-03 1986-10-14 National Research Development Corporation Protection of electrical power supply systems
US4709339A (en) * 1983-04-13 1987-11-24 Fernandes Roosevelt A Electrical power line parameter measurement apparatus and systems, including compact, line-mounted modules
US4744041A (en) * 1985-03-04 1988-05-10 International Business Machines Corporation Method for testing DC motors
US4758774A (en) * 1985-04-29 1988-07-19 Special Instruments Laboratory, Incorporated Portable tester and related method for determining the primary winding to secondary winding current ratio of an in-service current transformer
SE459059B (en) * 1987-09-16 1989-05-29 Asea Ab PROTECT FOR HIGH-RESISTANT EARTH ERRORS
JPH0640696B2 (en) * 1987-09-22 1994-05-25 三菱電機株式会社 DC bias magnetism detection method for transformer
US4964055A (en) * 1987-11-25 1990-10-16 Cooper Industries, Inc. Hand-held power system harmonic distortion meter with selective activation of display
US4815002A (en) * 1988-01-27 1989-03-21 Westinghouse Electric Corp. Obtaining a selected frequency component in rectangular coordinates from a set of electrical waveforms

Also Published As

Publication number Publication date
EP0454360B1 (en) 1997-07-09
JP3312167B2 (en) 2002-08-05
DE69126739D1 (en) 1997-08-14
DE69126739T2 (en) 1998-02-12
US5061890A (en) 1991-10-29
CA2040282C (en) 2000-06-06
EP0454360A1 (en) 1991-10-30
JPH04230870A (en) 1992-08-19

Similar Documents

Publication Publication Date Title
CA2040282A1 (en) Method and apparatus for digitally measuring electrical energy consumption
CA1269713A (en) Electronic electricity meters
US5298854A (en) Harmonic-adjusted watt-hour meter
Bartnikas A commentary on partial discharge measurement and detection
Djokic et al. Phase measurement of distorted periodic signals based on nonsynchronous digital filtering
ATE286599T1 (en) ARRANGEMENT FOR MEASURING ELECTRICAL ENERGY
Barros et al. A discussion of new requirements for measurement of harmonic distortion in modern power supply systems
US7548819B2 (en) Signal measurement and processing method and apparatus
EP1581816B1 (en) Measuring method for deciding direction to a flickering source
JPH06500626A (en) Aging evaluation method for insulators
Petricevic et al. Practical application of fiber-optic current sensor in power system harmonic measurement
DE69730167D1 (en) A DEVICE FOR MONITORING PARTIAL DISCHARGES IN A DEVICE WITH HIGH ELECTRIC VOLTAGE OR IN A HIGH VOLTAGE SYSTEM
JPS55155258A (en) Device for measuring characteristic of gapless arrester
Sanchez et al. Inductive attenuation of the transpolar voltage
Birkelbach et al. Very low frequency magnetic hysteresis measurements with well-defined time dependence of the flux density
RU2807018C1 (en) High-voltage direct-connection electric energy meter
CN218481047U (en) Hydroelectric set speed regulator aperture detection circuitry
CN216013510U (en) Extra-high voltage pipe gallery circuit contact resistance test system
SU1755216A1 (en) Device for measuring capacity of electric capacitors
RU2054185C1 (en) Method for detecting ground fault in equipment using common ground-insulated power supply
Su et al. Non-contact Voltage Measurement System for Low-Voltage Power-Line
Djokic et al. A high accuracy reactive power and energy meter insensitive to frequency variations
Drabich Investigation of long electrically conducting utility lines
SU976391A1 (en) Device for measuring asynchronous electric motor rotor current
Ling et al. Transient magnetic field waveform digital reconstruction based on sensor's full equation

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed