NO953609L - Method and apparatus for measuring power - Google Patents
Method and apparatus for measuring powerInfo
- 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
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.
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)
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)
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)
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 |
-
1993
- 1993-03-13 GB GB9305230A patent/GB2276011B/en not_active Expired - Fee Related
- 1993-03-13 GB GB9506330A patent/GB2285692A/en not_active Withdrawn
- 1993-03-13 GB GB9506331A patent/GB2285693B/en not_active Expired - Fee Related
-
1994
- 1994-03-11 ES ES94909198T patent/ES2081786T1/en active Pending
- 1994-03-11 AU AU62128/94A patent/AU679729B2/en not_active Ceased
- 1994-03-11 JP JP6520759A patent/JPH08507609A/en active Pending
- 1994-03-11 WO PCT/GB1994/000492 patent/WO1994022024A1/en not_active Application Discontinuation
- 1994-03-11 EP EP94909198A patent/EP0688434A1/en not_active Withdrawn
-
1995
- 1995-09-13 FI FI954297A patent/FI954297A/en not_active Application Discontinuation
- 1995-09-13 NO NO953609A patent/NO953609D0/en unknown
-
1996
- 1996-02-29 GR GR960300002T patent/GR960300002T1/en unknown
Cited By (1)
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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