JPS5763459A - Reactive power meter - Google Patents

Reactive power meter

Info

Publication number
JPS5763459A
JPS5763459A JP55138131A JP13813180A JPS5763459A JP S5763459 A JPS5763459 A JP S5763459A JP 55138131 A JP55138131 A JP 55138131A JP 13813180 A JP13813180 A JP 13813180A JP S5763459 A JPS5763459 A JP S5763459A
Authority
JP
Japan
Prior art keywords
reactive power
output
voltmeter
amount
given
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.)
Pending
Application number
JP55138131A
Other languages
Japanese (ja)
Inventor
Yoshio Ikeda
Kiyoshi Sasano
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.)
NIHON DENKI KEIKI KENTEISHIYO
Japan Electric Meters Inspection Corp JEMIC
Original Assignee
NIHON DENKI KEIKI KENTEISHIYO
Japan Electric Meters Inspection Corp JEMIC
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 NIHON DENKI KEIKI KENTEISHIYO, Japan Electric Meters Inspection Corp JEMIC filed Critical NIHON DENKI KEIKI KENTEISHIYO
Priority to JP55138131A priority Critical patent/JPS5763459A/en
Publication of JPS5763459A publication Critical patent/JPS5763459A/en
Pending 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)

Abstract

PURPOSE:To provide a highly durable and accurate reactive power meter which is designed to meter the amount of reactive power by means of a purely digital metering system. CONSTITUTION:The voltage and current of a power system to be measured are detected by a voltmeter 1 and an ammeter 2 respectively and given to A-D converters 3, 4 and also the output of the voltmeter 1 is given to a phase synchronizing pulse generator 5. Upon receipt of each pulse from the pulse generator 5, A-D converters 3, 4 convert input signals into sample values, and the output of a shift register 6 to which the output of the A-D converter 3 is given becomes a sample value of which phase is delayed by 90 deg. from that of the voltage of the voltmeter 1. The output of the shift register 6 is multiplied by the output of the A-D converter 4 by a multiplier 7 and the result is integrated by an adder 8 and the amount of reactive power is displayed on a digital display unit 9. By this method, the amount of reactive power can be obtained at a high accuracy.
JP55138131A 1980-10-02 1980-10-02 Reactive power meter Pending JPS5763459A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55138131A JPS5763459A (en) 1980-10-02 1980-10-02 Reactive power meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55138131A JPS5763459A (en) 1980-10-02 1980-10-02 Reactive power meter

Publications (1)

Publication Number Publication Date
JPS5763459A true JPS5763459A (en) 1982-04-16

Family

ID=15214702

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55138131A Pending JPS5763459A (en) 1980-10-02 1980-10-02 Reactive power meter

Country Status (1)

Country Link
JP (1) JPS5763459A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57148266A (en) * 1981-03-11 1982-09-13 Toshiba Corp Wattmeter
JPS6078357A (en) * 1983-10-05 1985-05-04 Tokyo Electric Power Co Inc:The Watthour meter
EP0391577A2 (en) * 1989-04-07 1990-10-10 THE GENERAL ELECTRIC COMPANY, p.l.c. Sampling circuits

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57148266A (en) * 1981-03-11 1982-09-13 Toshiba Corp Wattmeter
JPS6322265B2 (en) * 1981-03-11 1988-05-11 Tokyo Shibaura Electric Co
JPS6078357A (en) * 1983-10-05 1985-05-04 Tokyo Electric Power Co Inc:The Watthour meter
EP0391577A2 (en) * 1989-04-07 1990-10-10 THE GENERAL ELECTRIC COMPANY, p.l.c. Sampling circuits

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