JPS5684564A - Reactive power meter - Google Patents

Reactive power meter

Info

Publication number
JPS5684564A
JPS5684564A JP16314179A JP16314179A JPS5684564A JP S5684564 A JPS5684564 A JP S5684564A JP 16314179 A JP16314179 A JP 16314179A JP 16314179 A JP16314179 A JP 16314179A JP S5684564 A JPS5684564 A JP S5684564A
Authority
JP
Japan
Prior art keywords
voltage
reactive power
current
impressed
multiplier
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
JP16314179A
Other languages
Japanese (ja)
Inventor
Masayoshi Toda
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP16314179A priority Critical patent/JPS5684564A/en
Publication of JPS5684564A publication Critical patent/JPS5684564A/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

Abstract

PURPOSE:To obtain high precision and high stability by performing digital phase shift. CONSTITUTION:The voltage of a circuit to be measured is impressed on an input terminal 21 and the current is impressed on an input terminal 22. Sample holding circuits 23 and 24 perform sample holding operation for the voltage and current under the control of a control circuit 29 and send the same to A/D converters 25 and 26. The A/D converters 25 and 26 input a digitalized value of voltage and a digitalized value of current to a shift register 27 and a multiplier 28, respectively. The shift register 27 sends out an output delayed at an electrical angle of pi/2. The output of the multiplier 28 indicates a reactive power.
JP16314179A 1979-12-11 1979-12-11 Reactive power meter Pending JPS5684564A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16314179A JPS5684564A (en) 1979-12-11 1979-12-11 Reactive power meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16314179A JPS5684564A (en) 1979-12-11 1979-12-11 Reactive power meter

Publications (1)

Publication Number Publication Date
JPS5684564A true JPS5684564A (en) 1981-07-09

Family

ID=15767984

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16314179A Pending JPS5684564A (en) 1979-12-11 1979-12-11 Reactive power meter

Country Status (1)

Country Link
JP (1) JPS5684564A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60205377A (en) * 1984-03-30 1985-10-16 Yokogawa Hokushin Electric Corp Wattmeter
JPH01224676A (en) * 1988-03-04 1989-09-07 Tokyo Electric Power Co Inc:The Electronic watthour meter
JPH01224675A (en) * 1988-03-04 1989-09-07 Tokyo Electric Power Co Inc:The Electronic watthour meter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60205377A (en) * 1984-03-30 1985-10-16 Yokogawa Hokushin Electric Corp Wattmeter
JPH01224676A (en) * 1988-03-04 1989-09-07 Tokyo Electric Power Co Inc:The Electronic watthour meter
JPH01224675A (en) * 1988-03-04 1989-09-07 Tokyo Electric Power Co Inc:The Electronic watthour meter

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