Electric power system pricing with energy packets

Patent metadata

Field	Value
Publication number	US-11100595-B2
Application number	US-201916589731-A
Country	US
Kind code	B2
Filing date	Oct 1, 2019
Priority date	Oct 3, 2018
Publication date	Aug 24, 2021
Grant date	Aug 24, 2021

Abstract

Calculation of a value of energy passing a point of an electric power delivery system, and price associated with the value is disclosed herein. Use of energy packets according with the embodiments of this disclosure more accurately represents the amount of energy produced and consumed by equipment. Energy packets may be calculated over one or more phases, over configurable time periods. Energy packets may be used in conjunction with a monetary rate to calculate the price for billing an energy consumer or crediting an energy producer.

First claim

What is claimed is:

1. A device to calculate a value of energy passing through a point of an electric power delivery system, comprising:
a stimulus interface for receiving electric power delivery system signals at the point and providing current and voltage measurements;
an energy packet calculator in communication with the stimulus interface to calculate energy packets over predetermined time interval lengths entering the point and leaving the point by:
calculating products of the current measurements and the voltage measurements obtained over a time interval of the predetermined time interval length;
calculating a time interval power as a sum of the calculated products of the current and voltage measurements over the time interval;
calculating an energy packet value for the time interval as a product of the time interval power, the time interval length, and the number of voltage and current measurements;
separating positive energy packet values from negative energy packet values, wherein the separation of positive energy packet values and negative energy packet values is determined by energy entering and leaving the point; and,

a communications interface for transmitting the energy packet value to a receiving device.

2. The device of claim 1 , further comprising a price calculator to determine a price for the energy packet value as a product of the energy packet value and a monetary rate.

3. The device of claim 1 , wherein the energy packet value may be calculated as:
ε[ k ]= MT S Σ m=M(k−1)+1 Mk v [ m ] i [ m ]

where:
ε[k] represents the energy packet value at time n;
M represents the number of samples;
T s represents the sample time interval length;
v[m] represents the voltage measurement at time m; and,
i[m] represents the current measurement at time m.

4. The device of claim 1 , wherein the energy packet value is a three-phase energy packet value.

5. The device of claim 4 , wherein the three-phase energy packet value is calculated as:

ɛ
3

⁡

[
k
]

=

MT
s

⁢

∑

m
=

M
⁡

(

k
-
1

)

+
1

Mk

⁢

v

a
⁢

-

⁢
phase

⁡

[
m
]

⁢

i

a
⁢

-

⁢
phase

⁡

[
m
]

+

v

b
⁢

-

⁢
phase

⁡

[
m
]

⁢

i

b
⁢

-

⁢
phase

⁡

[
m
]

+

v

c
⁢

-

⁢
phase

⁡

[
m
]

⁢

i

c
⁢

-

⁢
phase

⁡

[
m
]

where:
ε 3 [n] represents the three-phase energy packet value at time n;
M represents the number of samples;
T s represents the sample time interval length;
v a-phase [m] represents the A-phase voltage measurement at time m;
i a-phase [m] represents the A-phase current measurement at time m;
v b-phase [m] represents the A-phase voltage measurement at time m;
i b-phase [m] represents the A-phase current measurement at time m;
v c-phase [m] represents the A-phase voltage measurement at time m; and,
i c-phase [m] represents the A-phase current measurement at time m.

6. The device of claim 1 , wherein the positive and negative energy packet values are calculated as:

ɛ
+

⁡

[
k
]

=

MT
s

⁢

Assignees

• Schweitzer Engineering Lab Inc

Inventors

• Schweitzer Iii Edmund O
• Whitehead David E
• Zweigle Gregary C
• Jacobsen Dallas J

Classifications

• G06Q50/06 Primary

  Energy or water supply · CPC title

• G01R21/00

  Arrangements for measuring electric power or power factor (G01R7/12 takes precedence) · CPC title

• G06Q30/0283 Primary

  Price estimation or determination · CPC title

• G01R21/06

  by measuring current and voltage (G01R21/08 - G01R21/133 take precedence) · CPC title

• H02J3/00

  Circuit arrangements for AC mains or AC distribution networks · CPC title