US 8,554,501 B2Granted

Method and device for the non-intrusive determination of the electrical power consumed by an installation, by analysing load transients

AssigneesElectricite de France, Universite Blaise Pascal—Clermont II, Landis+Gyr, Inc., Centre National de la Recherche Scientifique (CNRS)

InventorsAlioune Diop, Thierry Jouannet, Khalil El Khamlichi Drissi, Hala Najmeddine

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Abstract

A method and device for the non-intrusive determination of the electrical power consumed by a subscriber installation. From the sampled values of the supply current and supply voltage that are delivered to the installation, constituting a consumption signal, the sampled values are grouped in successive observation time windows; the poles and residues of the consumption signal are discriminated in each current window using the pencil method, the set of poles and residues associated with at least one singular value representing a combination of signatures of separate electrical loads; at least the active power consumed by a subset of electrical loads in operation is calculated, over at least the duration of the current observation window, the sum of the active powers consumed by each electrical load satisfying a consumed power function linking these poles and residues.

Claims14

Dependent claims

A method for non-intrusive determination of electrical power consumed by a subscriber installation, in which periodic sampling of values of supply voltage and of electric current intensity delivered to said subscriber installation is performed in order to obtain a consumption signal, wherein the periodic sampling comprises the steps of, based on the sampled values of the consumption signal:

grouping by a processor said values sampled in successive observation time windows;
discriminating by a processor in each successive current observation time window a set of poles and of residues of the consumption signal by a Pencil method, said set of poles and residues being representative, in a current observation window, of a combination of signatures of separate electrical loads including at least defined poles and residues associated with at least one singular value obtained by the Pencil method in operation in said subscriber installation;
calculating by a processor, for at least a duration of said current observation window, at least a subset active power consumed by at least one subset of the electrical loads in operation in the subscriber installation, expressed as a sum of separate active powers consumed by each separate electrical load of said subset complying with a consumed power function;
wherein, for said subset active power, said consumed power function complies with a relation:
P
=
∑
i
=
1
M
⁢
∑
i
′
=
1
M
′
⁢
R
ci
·
⁢
R
vi
′
·
ⅇ
(
S
ci
+
S
vi
′
)
⁢
(
t
kd
+
Δ
⁢
⁢
t
2
)
·
sinh
⁢
⁢
c
⁡
(
(
S
ci
+
S
vi
′
)
⁢
Δ
⁢
⁢
t
2
)
where P:
denotes the subset active power consumed by the subset of separate electrical loads Ci of signature (Si,Ri,SGi);
Sci and Rci:
denote the poles and respectively the residues of the sampled current delivered to the subscriber installation;
Svi′ and Rvi′:
denote the poles and respectively the residues of the sampled voltage delivered to the subscriber installation, SGi denoting the singular values;
tkd:
denotes the start time of the observation window of rank k;
Δt:
denotes the duration of the observation window;
sinh c(X):
a hyperbolic sine function of a cardinal of a value X, wherein:
sinh
⁢
⁢
c
⁡
(
(
S
ci
+
S
vi
′
)
⁢
Δ
⁢
⁢
t
2
)
=
sinh
⁡
(
(
S
ci
+
S
vi
′
)
⁢
Δ
⁢
⁢
t
2
)
/
(
(
S
ci
+
S
vi
′
)
⁢
Δ
⁢
⁢
t
2
)
;
M:
denotes the number of poles and residues of the sampled current delivered to the subscriber installation;
M′:
denotes the number of poles and residues of the sampled voltage delivered to the subscriber installation.

141 more elements

A device for non-intrusive determination of electrical power consumed by a subscriber installation, having at least means for periodic sampling of values of supply voltage and of electric current intensity delivered to said subscriber installation for obtaining a consumption signal, wherein said device further comprises at least:

means for calculating instantaneous power delivered, a product of the sampled values of the values of supply voltage and of the electric current intensity delivered, said consumption signal having at least one of the sampled values of the supply voltage delivered, the electric current intensity delivered or the instantaneous power delivered;
means for storing and reading successive values of the consumption signal in at least one observation window;
means for application, on the consumption signal, in at least one current observation window, of a filtering treatment by a Pencil method, for discriminating, in said window, a set of poles and residues representative of a combination of signatures of separate electrical loads including at least the poles and the residues associated with at least one singular value obtained by the Pencil method in operation in the subscriber installation;
means for temporal tracking of said combination of signatures and for calculating, for at least a duration of the current observation window, at least a subset active power consumed by at least one subset of the electrical loads in operation in the subscriber installation, expressed as a sum of separate active powers consumed by each separate electrical load of this subset complying with a consumed power function linking said poles and residues;
wherein, for said subset active power, said function complies with:
P
=
∑
i
=
1
M
⁢
∑
i
′
=
1
M
′
⁢
R
ci
·
⁢
R
vi
′
·
ⅇ
(
S
ci
+
S
vi
′
)
⁢
(
t
kd
+
Δ
⁢
⁢
t
2
)
·
sinh
⁢
⁢
c
⁡
(
(
S
ci
+
S
vi
′
)
⁢
Δ
⁢
⁢
t
2
)
where P:
denotes the subset active power consumed by the subset of separate electrical loads Ci of signature (Si,Ri,SGi);
Sci and Rci:
denote the poles and respectively the residues of the sampled current delivered to the installation;
Svi′ and Rvi′:
denote the poles and respectively the residues of the sampled voltage delivered to the installation, SGi denoting the singular values;
tkd:
denotes the start time of the observation window of rank k;
Δt:
denotes the duration of the observation window;
sinh c(X):
the hyperbolic sine function of the cardinal of the value X, i.e.
sinh
⁢
⁢
c
⁡
(
(
S
ci
+
S
vi
′
)
⁢
Δ
⁢
⁢
t
2
)
=
sinh
⁡
(
(
S
ci
+
S
vi
′
)
⁢
Δ
⁢
⁢
t
2
)
/
(
(
S
ci
+
S
vi
′
)
⁢
Δ
⁢
⁢
t
2
)
;
M:
denotes the number of poles and residues of the sampled current delivered to the installation;
M′:
denotes the number of poles and residues of the sampled voltage delivered to the installation.

142 more elements

A non-transitory computer readable storage medium containing computer instructions stored therein for causing a computer processor or the central processing unit of a dedicated device to apply a method for non-intrusive determination of electrical power consumed by a subscriber installation, in which periodic sampling of values of supply voltage and of electric current intensity delivered to said subscriber installation is performed in order to obtain a consumption signal, by performing the steps of, based on the sampled values of the consumption signal:

grouping said values sampled in successive observation time windows;
discriminating in each successive current observation time window a set of poles and of residues of the consumption signal by a Pencil method, said set of poles and residues being representative, in a current observation window, of a combination of signatures of separate electrical loads including at least defined poles and residues associated with at least one singular value obtained by the Pencil method in operation in said subscriber installation;
calculating, for at least a duration of said current observation window, at least a subset active power consumed by at least one subset of the electrical loads in operation in the subscriber installation, expressed as a sum of separate active powers consumed by each separate electrical load of said subset complying with a consumed power function linking said poles and residues;
wherein, for said active power, said function complies with a relation:
P
=
∑
i
=
1
M
⁢
∑
i
′
=
1
M
′
⁢
R
ci
·
⁢
R
vi
′
·
ⅇ
(
S
ci
+
S
vi
′
)
⁢
(
t
kd
+
Δ
⁢
⁢
t
2
)
·
sinh
⁢
⁢
c
⁡
(
(
S
ci
+
S
vi
′
)
⁢
Δ
⁢
⁢
t
2
)
where P:
denotes the subset active power consumed by the subset of separate electrical loads Ci of signature (Si,Ri,SGi);
Sci and Rci:
denote the poles and respectively the residues of the sampled current delivered to the installation;
Svc′ and Rvi′:
denote the poles and respectively the residues of the sampled voltage delivered to the installation, SGi denoting the singular values;
tkd:
denotes the start time of the observation window of rank k;
Δt:
denotes the duration of the observation window;
sinh c(X):
the hyperbolic sine function of the cardinal of the value X, i.e.
sinh
⁢
⁢
c
⁡
(
(
S
ci
+
S
vi
′
)
⁢
Δ
⁢
⁢
t
2
)
=
sinh
⁡
(
(
S
ci
+
S
vi
′
)
⁢
Δ
⁢
⁢
t
2
)
/
(
(
S
ci
+
S
vi
′
)
⁢
Δ
⁢
⁢
t
2
)
;
M:
denotes the number of poles and residues of the sampled current delivered to the installation;
and
M′:
denotes the number of poles and residues of the sampled voltage delivered to the installation.

142 more elements

Dependencies are inferred from the claim text.