CA2148075A1 - High accuracy power monitor and method - Google Patents

High accuracy power monitor and method

Info

Publication number
CA2148075A1
CA2148075A1 CA002148075A CA2148075A CA2148075A1 CA 2148075 A1 CA2148075 A1 CA 2148075A1 CA 002148075 A CA002148075 A CA 002148075A CA 2148075 A CA2148075 A CA 2148075A CA 2148075 A1 CA2148075 A1 CA 2148075A1
Authority
CA
Canada
Prior art keywords
power
signals
current signals
voltage
analog
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
CA002148075A
Other languages
French (fr)
Other versions
CA2148075C (en
Inventor
Peter M. Van Doorn
Simon Hugh Lightbody
Chuen Shan Simon Ki
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.)
Power Measurement Ltd
Original Assignee
Power Measurement Ltd
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=23447571&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2148075(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Power Measurement Ltd filed Critical Power Measurement Ltd
Publication of CA2148075A1 publication Critical patent/CA2148075A1/en
Application granted granted Critical
Publication of CA2148075C publication Critical patent/CA2148075C/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
    • G01R21/1331—Measuring real or reactive component, measuring apparent energy
    • 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

Abstract

A power meter is disclosed for determining power parameters for power lines having periodic 3-phase voltage and current signals distributed to a plurality of power equipment. The 3-phase voltage and current signals have a fundamental frequency. The power lines are connected to at least one transducer which generates analog signals representing the voltage and current signals. The power meter includes receiving circuitry which can be connected to the at least one transducer to receive the analog signals. An analog to digital converter receives the output signal from the receiving circuitry and converts the voltage and current signals to digital data representing the analog signals. A processor receives the digital data and includes logic for calculating the power parameters.
The power meter compensates for errors caused by not sampling synchronous to the fundamental frequency of the signals.
CA002148075A 1994-12-30 1995-04-27 High accuracy power monitor and method Expired - Fee Related CA2148075C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/367,534 1994-12-30
US08/367,534 US5736847A (en) 1994-12-30 1994-12-30 Power meter for determining parameters of muliphase power lines

Publications (2)

Publication Number Publication Date
CA2148075A1 true CA2148075A1 (en) 1996-07-01
CA2148075C CA2148075C (en) 2001-03-20

Family

ID=23447571

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002148075A Expired - Fee Related CA2148075C (en) 1994-12-30 1995-04-27 High accuracy power monitor and method

Country Status (2)

Country Link
US (2) US5736847A (en)
CA (1) CA2148075C (en)

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US5736847A (en) 1998-04-07
CA2148075C (en) 2001-03-20
US6185508B1 (en) 2001-02-06

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