JPS5726762A - Reactive watt-hour meter - Google Patents

Reactive watt-hour meter

Info

Publication number
JPS5726762A
JPS5726762A JP10227680A JP10227680A JPS5726762A JP S5726762 A JPS5726762 A JP S5726762A JP 10227680 A JP10227680 A JP 10227680A JP 10227680 A JP10227680 A JP 10227680A JP S5726762 A JPS5726762 A JP S5726762A
Authority
JP
Japan
Prior art keywords
multiplier
angular frequency
sent
output
electric power
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
JP10227680A
Other languages
Japanese (ja)
Other versions
JPS6152950B2 (en
Inventor
Teruhiko Ito
Haruo Takahashi
Shunichi Kobayashi
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP10227680A priority Critical patent/JPS5726762A/en
Publication of JPS5726762A publication Critical patent/JPS5726762A/en
Publication of JPS6152950B2 publication Critical patent/JPS6152950B2/ja
Granted 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 achieve high-precision reactive electric power measurement by detecting a frequency from a voltage signal for electric power calculation, by generating a voltage which corresponds to the frequency, and by removing a frquency fluctuation component from the output of a multiplier for electric power calculation on the basis of the signal. CONSTITUTION:Signals ev and ei are obtaind from a transformer 1 for instruments and a current transformer 5; the ev is supplied to a phase shifter 4 to obtain an ev', which is sent to a multiplier 6. The output ev'Xei of the multiplier 6 is sent to the 2nd multiplier 7. The signal ev is supplied to an angular frequency detector 2 to detect an angular frequency omega and then converted by a converter 3 into a voltage eomega, which is sent to a multiplier 7. Its output is integrated by an integral network 8 to cancel a component depending upon the angular frequency, so that reactive power Q is obtained without being influenced by the angular frequency omega.
JP10227680A 1980-07-25 1980-07-25 Reactive watt-hour meter Granted JPS5726762A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10227680A JPS5726762A (en) 1980-07-25 1980-07-25 Reactive watt-hour meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10227680A JPS5726762A (en) 1980-07-25 1980-07-25 Reactive watt-hour meter

Publications (2)

Publication Number Publication Date
JPS5726762A true JPS5726762A (en) 1982-02-12
JPS6152950B2 JPS6152950B2 (en) 1986-11-15

Family

ID=14323073

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10227680A Granted JPS5726762A (en) 1980-07-25 1980-07-25 Reactive watt-hour meter

Country Status (1)

Country Link
JP (1) JPS5726762A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS618680A (en) * 1984-06-22 1986-01-16 Yokogawa Hokushin Electric Corp Reactive power and direct current signal converter
JPS61212774A (en) * 1985-03-18 1986-09-20 Yokogawa Electric Corp Power-factor detector
JPS62273464A (en) * 1986-05-21 1987-11-27 Tokyo Electric Power Co Inc:The Reactive power meter
JPH01114763A (en) * 1987-10-29 1989-05-08 Nippon Denki Keiki Kenteishiyo Electronic watthour meter for reactive power
JPH01155275A (en) * 1987-12-11 1989-06-19 Nippon Denki Keiki Kenteishiyo Electronic type var-hour meter

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS618680A (en) * 1984-06-22 1986-01-16 Yokogawa Hokushin Electric Corp Reactive power and direct current signal converter
JPH0130111B2 (en) * 1984-06-22 1989-06-16 Yokogawa Electric Corp
JPS61212774A (en) * 1985-03-18 1986-09-20 Yokogawa Electric Corp Power-factor detector
JPS62273464A (en) * 1986-05-21 1987-11-27 Tokyo Electric Power Co Inc:The Reactive power meter
JPH01114763A (en) * 1987-10-29 1989-05-08 Nippon Denki Keiki Kenteishiyo Electronic watthour meter for reactive power
JPH01155275A (en) * 1987-12-11 1989-06-19 Nippon Denki Keiki Kenteishiyo Electronic type var-hour meter

Also Published As

Publication number Publication date
JPS6152950B2 (en) 1986-11-15

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