NO953609L - Method and apparatus for measuring power - Google Patents

Method and apparatus for measuring power

Info

Publication number
NO953609L
NO953609L NO953609A NO953609A NO953609L NO 953609 L NO953609 L NO 953609L NO 953609 A NO953609 A NO 953609A NO 953609 A NO953609 A NO 953609A NO 953609 L NO953609 L NO 953609L
Authority
NO
Norway
Prior art keywords
signal
proportional
period
voltage
collected
Prior art date
Application number
NO953609A
Other languages
Norwegian (no)
Other versions
NO953609D0 (en
Inventor
Kenneth Payne
David Alexander Watson
Roger Henry King
Original Assignee
Ampy Automation Digilog
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 Ampy Automation Digilog filed Critical Ampy Automation Digilog
Publication of NO953609L publication Critical patent/NO953609L/en
Publication of NO953609D0 publication Critical patent/NO953609D0/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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
    • G01R19/252—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques using analogue/digital converters of the type with conversion of voltage or current into frequency and measuring of this frequency

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • General Induction Heating (AREA)
  • Electron Sources, Ion Sources (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

Det er beskrevet et apparat for måling av elektrisk effekt, og hvor apparatet er tilpasset for å frembringe et utgangssignal proporsjonalt med produktet av en forsyningsspenning (3) og strømmen (1) som flyter gjennom en tilkoblet belastning. Et første signal (10) proporsjonalt med forsyningsspenningen og et andre signal (9) proporsjonalt med belastningsstrømmen utnyttes for å modulere perioden av to bærebølgesignaler med konstant frekvens. Gjennomsnittet for i det minste ett av de modulerte signaler bestemmes ved hjelp av signalbehandlings- utstyr for å frembringe en referanseverdi for apparatet. Multiplisering av de modulerte signaler ved hjelp av mikroprosessoren frembringer effektproduktutgangssignalet. Påfølgende verdier av det periodemodulerte spenningsrelaterte signal oppsamles. Den oppsamlede verdi låses periodisk og mates til en datamaskin. En pulsteller og en tidsstyringskrets kan anordnes for å motta og måle det spenningsrelaterte periodevarierende signal.An apparatus for measuring electrical power is disclosed and wherein the apparatus is adapted to produce an output signal proportional to the product of a supply voltage (3) and current (1) flowing through a connected load. A first signal (10) proportional to the supply voltage and a second signal (9) proportional to the load current are utilized to modulate the period of two constant frequency carrier signals. The average of at least one of the modulated signals is determined by signal processing equipment to generate a reference value for the apparatus. Multiplying the modulated signals by the microprocessor produces the power product output signal. Subsequent values of the period-modulated voltage-related signal are collected. The collected value is periodically locked and fed to a computer. A pulse counter and a timing circuit may be arranged to receive and measure the voltage-related period-varying signal.

NO953609A 1993-03-13 1995-09-13 Method and apparatus for measuring power NO953609D0 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9305230A GB2276011B (en) 1993-03-13 1993-03-13 Improvements in and relating to power meters
PCT/GB1994/000492 WO1994022024A1 (en) 1993-03-13 1994-03-11 Power meter

Publications (2)

Publication Number Publication Date
NO953609L true NO953609L (en) 1995-09-13
NO953609D0 NO953609D0 (en) 1995-09-13

Family

ID=10732048

Family Applications (1)

Application Number Title Priority Date Filing Date
NO953609A NO953609D0 (en) 1993-03-13 1995-09-13 Method and apparatus for measuring power

Country Status (9)

Country Link
EP (1) EP0688434A1 (en)
JP (1) JPH08507609A (en)
AU (1) AU679729B2 (en)
ES (1) ES2081786T1 (en)
FI (1) FI954297A (en)
GB (3) GB2276011B (en)
GR (1) GR960300002T1 (en)
NO (1) NO953609D0 (en)
WO (1) WO1994022024A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104459303A (en) * 2014-12-24 2015-03-25 国家电网公司 Double-bus self-adaption sampling line selection device

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2285694B (en) * 1993-03-13 1997-05-21 Ampy Automation Digilog Power Measuring Method
GB2306677B (en) * 1995-11-02 2000-10-04 Siemens Measurements Ltd Improvements in or relating to electricity meters
JP3290946B2 (en) 1998-03-10 2002-06-10 株式会社東芝 Power calculation device
JP2007147334A (en) * 2005-11-24 2007-06-14 Jimbo Electric Co Ltd Digital display current-monitoring unit
CN103353545B (en) * 2013-07-22 2015-06-10 国家电网公司 Voltage and current loop carrier wave isolation and attenuation equipment
CN103645457B (en) * 2013-12-20 2016-06-01 国家电网公司 A kind of on-site inspection device for electric energy meter
CN105487032A (en) * 2016-01-04 2016-04-13 国网山东省电力公司青岛供电公司 Verification device
US11442087B2 (en) * 2019-04-25 2022-09-13 Microchip Technology Incorporated Adaptive power measurement accumulator with a changing sampling frequency
CN110297124B (en) * 2019-08-06 2022-04-12 南方电网科学研究院有限责任公司 Non-grounded voltage measuring device and method
CN114942402B (en) * 2022-07-20 2022-11-29 武汉格蓝若智能技术有限公司 Abnormal electric energy meter positioning method and system

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH551013A (en) * 1972-06-07 1974-06-28 Landis & Gyr Ag CIRCUIT ARRANGEMENT FOR PRODUCT FORMATION FROM VOLTAGE AND CURRENT FOR THE PURPOSE OF MEASURING ELECTRICAL ENERGY.
DE2839123C2 (en) * 1978-09-08 1980-10-23 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Voltage-frequency converter
EP0446962A3 (en) * 1986-04-11 1992-06-03 Schlumberger Industries, Inc. Solid state electricity meter display
JPS63246025A (en) * 1987-04-01 1988-10-13 Nec Corp Pulse frequency modulating circuit
GB2217027A (en) * 1988-04-05 1989-10-18 Omega Electric Ltd Active power measurement
GB2286250B (en) * 1991-09-19 1996-04-03 Ampy Automation Digilog Improved power meter
GB9120011D0 (en) * 1991-09-19 1991-11-06 Ampy Automation Digilog Improvements in and relating to power meter
GB2285694B (en) * 1993-03-13 1997-05-21 Ampy Automation Digilog Power Measuring Method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104459303A (en) * 2014-12-24 2015-03-25 国家电网公司 Double-bus self-adaption sampling line selection device

Also Published As

Publication number Publication date
AU6212894A (en) 1994-10-11
JPH08507609A (en) 1996-08-13
GB2285693A (en) 1995-07-19
GB9506330D0 (en) 1995-05-17
ES2081786T1 (en) 1996-03-16
GR960300002T1 (en) 1996-02-29
EP0688434A1 (en) 1995-12-27
FI954297A (en) 1995-10-13
GB2276011B (en) 1997-05-14
GB9506331D0 (en) 1995-05-17
GB2276011A (en) 1994-09-14
GB9305230D0 (en) 1993-04-28
FI954297A0 (en) 1995-09-13
AU679729B2 (en) 1997-07-10
GB2285692A (en) 1995-07-19
GB2285693B (en) 1997-05-21
WO1994022024A1 (en) 1994-09-29
NO953609D0 (en) 1995-09-13

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