Self-phasing electric meter and automation system
AssigneeSiemens Industry, Inc.
InventorsTyrell Craig Vaughn, Joe Wallace White
Life of this patent
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Abstract
Building automation systems, energy meters, and associated methods. A method includes receiving a plurality of voltage inputs and a plurality of current inputs from a multiphase power source. The method includes selecting a first voltage input from the plurality of voltage inputs. The method includes performing a signed power factor computation between respective pairs of the first voltage input and each of the plurality of current inputs. The method includes identifying a pair with a greatest positive power factor value. The method includes designating the identified pair with the greatest positive power factor value as an associated phase pair.
Claims20
A method, comprising:
- receiving a plurality of voltage inputs and a plurality of current inputs by an energy meter and from a multiphase power source;
- selecting a first voltage input from the plurality of voltage inputs by the energy meter;
- performing a signed power factor computation between respective pairs of the first voltage input and each of the plurality of current inputs by the energy meter;
- identifying a pair with a greatest positive power factor value by the energy meter;
- and
- designating the identified pair with the greatest positive power factor value as an associated phase pair by the energy meter.
An energy meter, comprising:
- a plurality of voltage input connections and a plurality of current input connections;
- a controller operatively connected to the voltage input connections and the current input connections;
- and
- a memory operatively connected to the controller, wherein the energy meter is configured to:
- receive a plurality of voltage inputs at the voltage input connections and a plurality of current inputs at the current input connections, from a multiphase power source;
- select a first voltage input from the plurality of voltage inputs;
- perform a signed power factor computation between respective pairs of the first voltage input and each of the plurality of current inputs;
- identify a pair with a greatest positive power factor value;
- and
- designate the identified pair with the greatest positive power factor value as an associated phase pair.
A building automation system, comprising:
- a site controller;
- and
- an energy meter having a plurality of voltage input connections and a plurality of current input connections, a controller operatively connected to the voltage input connections and the current input connections, and a memory operatively connected to the controller, wherein the energy meter is configured to:
- receive a plurality of voltage inputs at the voltage input connections and a plurality of current inputs at the current input connections, from a multiphase power source;
- select a first voltage input from the plurality of voltage inputs;
- perform a signed power factor computation between respective pairs of the first voltage input and each of the plurality of current inputs;
- identify a pair with a greatest positive power factor value;
- and
- designate the identified pair with the greatest positive power factor value as an associated phase pair.
Dependencies are inferred from the claim text.