UST955007I4 - Method and apparatus for metering apparent energy - Google Patents

Method and apparatus for metering apparent energy Download PDF

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Publication number
UST955007I4
UST955007I4 US05/697,892 US69789276A UST955007I4 US T955007 I4 UST955007 I4 US T955007I4 US 69789276 A US69789276 A US 69789276A US T955007 I4 UST955007 I4 US T955007I4
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US
United States
Prior art keywords
apparent
signal
electrical system
pulse
product
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
US05/697,892
Inventor
Miran Milkovic
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Priority to US05/697,892 priority Critical patent/UST955007I4/en
Application granted granted Critical
Publication of UST955007I4 publication Critical patent/UST955007I4/en
Pending legal-status Critical Current

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    • 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
    • G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
    • G01R11/48—Meters specially adapted for measuring real or reactive components; Meters specially adapted for measuring apparent energy

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

Metering kVA and kVAh in an electrical system is accomplished by generating pairs of analog signals representing current and voltage variables. Each of the analog signals is synchronously rectified to provide a pair of full-wave rectified signals which are multiplied together in a pulse-width amplitude multiplier network to produce a product signal having a DC component which is proportional to the product of the voltage and current variables. In addition, the product signal includes AC components which are filtered out in a low pass filter to thereby provide an output signal which is proportional to the apparent power in the electrical system. The apparent electrical power signal is converted to an apparent electrical energy signal by means of an analog to-pulse converter wherein each output pulse thereof corresponds to a predetermined amount of apparent energy in the electrical system.
US05/697,892 1974-11-29 1976-06-21 Method and apparatus for metering apparent energy Pending UST955007I4 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US05/697,892 UST955007I4 (en) 1974-11-29 1976-06-21 Method and apparatus for metering apparent energy

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US52804174A 1974-11-29 1974-11-29
US05/697,892 UST955007I4 (en) 1974-11-29 1976-06-21 Method and apparatus for metering apparent energy

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US52804174A Continuation 1974-11-29 1974-11-29

Publications (1)

Publication Number Publication Date
UST955007I4 true UST955007I4 (en) 1977-02-01

Family

ID=27062597

Family Applications (1)

Application Number Title Priority Date Filing Date
US05/697,892 Pending UST955007I4 (en) 1974-11-29 1976-06-21 Method and apparatus for metering apparent energy

Country Status (1)

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US (1) UST955007I4 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0282208A1 (en) * 1987-02-27 1988-09-14 Process Systems, Inc. Method and apparatus for measuring electricity

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0282208A1 (en) * 1987-02-27 1988-09-14 Process Systems, Inc. Method and apparatus for measuring electricity

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