US 11,378,601 B2Granted

Operational state determination apparatus

AssigneeSignify Holding B.V.

InventorsAlessio Filippi, Ronald Rietman, Ying Wang, Ashish Vijay Pandharipande, Paul Anthony Shrubsole

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Abstract

The invention relates to an operational state determination apparatus (1) for determining whether a variation in a determined electrical parameter of an electrical network (2) is caused by a variation in an operational state of an electrical consumer of the electrical network. The electrical network comprises multiple electrical consumers (3, 4, 5) and a voltage source (6), wherein a variation classification unit (10) determines whether a variation in the determined electrical parameter of the electrical network is caused by a variation in the operational state of an electrical consumer of the network depending on a decision variable which depends on a variation in a measured voltage and a variation in a measured current of the electrical network. This determination can be performed, without directly using the variation in the determined electrical parameter of the electrical network and is therefore less influenced by random voltage fluctuations in the electrical network.

Claims12

Dependent claims

A non-intrusive operational state determination apparatus for determining whether a variation in a determined electrical parameter of an electrical network is caused by a variation in an operational state of an electrical consumer of the electrical network, wherein the electrical network comprises multiple electrical consumers and a voltage source, wherein the operational state determination apparatus comprises:

a voltage meter for measuring a voltage in the electrical network at only a single electricity exit location in the electrical network,
a current meter for measuring a current in the electrical network at only a single electricity entrance location in the electrical network,
a processor to determine a decision variable based on a variation in the measured voltage and a variation in the measured current, wherein the decision variable is indicative of whether a variation in the determined electrical parameter of the electrical network is caused by a variation in the operational state of an electrical consumer, and wherein the processor further determines whether a variation in the determined electrical parameter of the electrical network is caused by a variation in the operational state of an electrical consumer of the network depending on the determined decision variable;
wherein if a ratio of the variation of the voltage and a variation of the current is smaller than a threshold it is determined that the electrical parameter is caused by a variation in the operational state of an electrical consumer, if the ratio is larger than the threshold it is determined that the electrical parameter is not caused by a variation in the operational state of an electrical consumer.

1 more element

A non-intrusive operational state determination method for determining whether a variation in a determined electrical parameter of an electrical network is caused by a variation in an operational state of an electrical consumer of the electrical network, wherein the electrical network comprises multiple electrical consumers and a voltage source, wherein the operational state determination method comprises:

measuring a voltage in the electrical network at only a single electricity exit location in the electrical network,
measuring a current in the electrical network at only a single electricity entrance location in the electrical network,
determining a decision variable depending on a variation in the measured voltage and a variation in the measured current, wherein the decision variable is determined depending on a ratio of a variation in the voltage and a variation in the current and indicative of whether a variation in the determined electrical parameter of the electrical network is caused by a variation in the operational state of an electrical consumer without measuring the voltage and current of each of the multiple electrical consumers or if the variation is voltage fluctuation in the electrical network,
determining whether a variation in the determined electrical parameter of the electrical network is caused by a variation in the operational state of an electrical consumer of the network depending on the determined decision variable;
wherein if a ratio of the variation of the voltage and a variation of the current is smaller than a threshold it is determined that the electrical parameter is caused by a variation in the operational state of an electrical consumer, if the ratio is larger than the threshold it is determined that the electrical parameter is not caused by a variation in the operational state of an electrical consumer.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/877,514Filed 7 Oct 2011
Priority: EP 1018756014 Oct 2010
Published: US 2013/0211756 A115 Aug 2013
Granted: 5 Jul 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification19 codes

G01R 19/2513
Using digital measurement techniques: arrangements for monitoring electric power systems, e.g. power lines or loads; Logging
G01D 4/002
Tariff metering apparatus: remote reading of utility meters
G01R 21/133
Arrangements for measuring electric power or power factor: by using digital technique
G01R 35/00
Testing or calibrating of apparatus covered by the other groups of this