Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Plural inputs
Patent
1991-04-25
1993-07-20
Karlsen, Ernest F.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Plural inputs
324141, 364483, G01R 2106, G01R 21133
Patent
active
052297136
ABSTRACT:
A method of operating a meter to perform the steps of generating a measure of real energy consumed, generating a measure of reactive energy consumed, and generating, from the real energy and reactive energy measures, a measure of apparent energy consumed. In one embodiment, the real energy and reactive energy measures are provided as integer quantity inputs. Particularly, assume S=kVAh, P=kWh, Q=kVARh, and R=Residue. Respective registers store values of P, [2P+1], Q, [2Q+1], and the sum [P.sup.2 +Q.sup.2 ]. Initially, the P, Q, and [P.sup.2 +Q.sup.2 ] registers are set to zero, while the [2P+1] and [2Q+1] registers are initialized to 1. At the arrival of a P pulse, the value in the [2P +1] register is added to the [P.sup.2 +Q.sup.2 ] register, then the P register is incremented by 1 and the [2P+1] register is incremented by 2. Exactly the same steps are carried out subsequent to receipt of a Q pulse. A set of registers also is used to store the S and [2S+1] data, and generation of the S pulses is determined as follows. After arrival of either a P or Q pulse, a trial subtraction of [2S+1] is made from the [P.sup.2 +Q.sup.2 ] register. If the subtraction does not cause an underflow, an S pulse is generated, the S register is incremented by 1, and the [2S+1] register is incremented by 2. If the subtraction causes an underflow, the [P.sup.2 +Q.sup.2 ] register is reset to its previous value, the other registers are not incremented, and no S pulse is generated.
REFERENCES:
patent: 2610789 (1952-09-01), Hales
patent: 3024416 (1962-03-01), Becker
patent: 3505505 (1970-04-01), Byerly et al.
patent: 3505506 (1970-04-01), Kostalos, Jr.
patent: 3748440 (1973-07-01), Alexander
patent: 3829671 (1974-08-01), Gathright et al.
patent: 3858036 (1974-12-01), Lunsford
patent: 3917935 (1975-11-01), Lazecki
patent: 3939330 (1976-02-01), Fluet
patent: 4077061 (1978-02-01), Johnston et al.
patent: 4131847 (1978-12-01), Kohga et al.
patent: 4174499 (1979-11-01), Waurick
patent: 4257004 (1981-03-01), Miller
patent: 4298942 (1981-11-01), Lee
patent: 4300182 (1981-11-01), Schweitzer, III
patent: 4408283 (1983-10-01), Kovalchik et al.
patent: 4454471 (1984-06-01), Schwendtner et al.
patent: 4553260 (1985-11-01), Belt et al.
patent: 4595988 (1986-06-01), Chiffert et al.
patent: 4615009 (1986-09-01), Battocletti et al.
patent: 4663587 (1987-05-01), Mackenzie
patent: 4672555 (1987-06-01), Hart et al.
patent: 4694417 (1987-09-01), Cantwell
patent: 4749941 (1988-06-01), Halder et al.
patent: 4794369 (1988-12-01), Haferd
patent: 4837504 (1989-06-01), Baer et al.
patent: 4853620 (1989-08-01), Halder et al.
patent: 4881027 (1989-11-01), Joder et al.
patent: 4884021 (1989-11-01), Hammond et al.
patent: 4902965 (1990-02-01), Bodrug et al.
patent: 4931725 (1990-06-01), Hutt et al.
patent: 4937520 (1990-06-01), Arseneau et al.
patent: 4979122 (1990-12-01), Davis et al.
patent: 5122735 (1992-06-01), Porter et al.
patent: 5146157 (1992-09-01), Clark et al.
Bullock, An Algorithm For Calculating kVAh, General Electric Company, Meter & Control, Somersworth, N.H. 03878 (to be published).
Bullock, Solid State Meter Technology, North Carolina Meter School, Wilmington, N.C., Jun. 20, 1990.
Chpt. 9, Kilovar and Kilovolt-Ampere Metering, Handbook For Electricity Metering, Eight Edition, Edison Electric Institute, 1981, 1111 19th Street, N.W., Washington, D.C. 20036.
Electric Power Metering, McGraw-Hill Book Company, Inc., 1934 pp. 271-272.
Electric Meter History and Progress, Sangamo Electric Company, Springfield Ill., 1025 p. 60.
European Search Report, Application No. 92303673 (and cited documents).
Sangamo Energy Management Division, Product Bulletin 10506, ST-Q100 Series, Electronic Meter, Effective Date Jun., 1987.
Sangamo Energy Management Division, Product Bulletin 10251, ST-Q120 Series, Electronic Meter, Effective Date Aug., 1987.
Sangamo Electricity Division, KV1 Multifunction Meter, Product Bulletin 10532, Effective Sep., 1989.
Scientific Columbus, JEM3, Sep. 1989.
Applachian Technologies Corporation, SSM-SOT Four Quadrant, Time-of-Use Precision Meter, Oct. 1989.
Aptech, Inc., PFM-800 Series Multifunction Meters, Jan. 1991.
Process Systems Incorporated, The Quad 4 Solid State Meter Family, May 1991.
Trans Data, EMS 7000 Electronic Metering System with Demand Register, Publication Date Unknown, this copy obtained on May 14, 1991.
Trans Data, Inc. EMS 96 Electronic Metering System, Publication Date Unknown, this copy obtained on May 14, 1991.
ABB Type E1R Polyphase Solid-State Watthour/Varhour Meter, Sep. 1991.
Schlumberger Industries, Inc. Introducing Fulcrum Commercial/Industrial Meters, Mar. 1991.
Transmission & Distribution, May 1992, Universal Meter Introduced by ABB.
Engineering presentation to AIEC/EEI Meter and Service Committees, G.E. Meter and Control (Sep. 24, 1990) pp. 1-6.
Alexander, Square Root Routine, IBM Technical Disclosure Bulletin, vol. 20, No. 3, Aug., 1977.
Molar et al., Replacing Square Roots By Pythagorean Sums, IBM J. Res. Devlop, Nov., 1984.
Dubrulle, A Class of Numerical Methods for the Computation of Pythagorean Sums, IBM J. Res. Develop, vol. 27, No. 6, Nov., 1984.
Hogden, Mathematics For The Million, 1940.
Bullock Donald F.
Hardy Samuel G.
General Electric Company
Karlsen Ernest F.
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