# US 10,312,726 B2 · Method and system using weighted generation capacity to improve management of electrical power generation facility

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- Number: US 10,312,726 B2
- Document ID: US10312726B2
- Status: Granted
- Kind: B2
- Application number: 15/507,008
- Filed: 2015-09-04
- Published: 2017-10-26
- Granted: 2019-06-04
- Earliest claimed: 2014-09-05
- Assignees: Electricite de France
- Applicants: Electricite De France
- Inventors: Jean Alzieu; Guy Schweitz; Patrick Theuret
- Web page: https://patentgrep.com/patent/US10312726B2

## CPC

- H02J 7/35: with light sensitive cells
- H02J 3/28: Arrangements for balancing of the load in networks by storage of energy
- H02J 3/381: {Dispersed generators}
- H02J 7/82: Control of state of charge [SOC]
- H02J 7/865: {Battery or charger load switching, e.g. concurrent charging and load supply (H02J7/50 takes precedence)}
- H02J 7/96: in response to battery voltage
- H02S 40/38: Energy storage means, e.g. batteries, structurally associated with PV modules
- H02S 50/00: Monitoring or testing of PV systems, e.g. load balancing or fault identification
- H02J 2101/24: Photovoltaics
- Y02E 10/56: Power conversion systems, e.g. maximum power point trackers
- Y02E 70/30: Systems combining energy storage with energy generation of non-fossil origin
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02S: GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES (obtaining electrical energy from radioactive sources G21H1/12; light sensitive inorganic semiconductor devices H10F; light sensitive organic semiconductor devices H10K30/00; thermoelectric devices H10N10/00; pyroelectric devices H10N15/00)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A method for managing an electrical power generation facility including an electrical power generation device, a storage device, and a control module is described. The method includes: assessing a power generation capacity of the generating device for a given period; determining a weighted generation capacity on the basis of said assessed generation capacity and at least one assessed power generation capacity of said generation device over a period preceding said given period; and determining, for a period after the given period, a discharge limit for the storage device on the basis of said weighted generation capacity. A related computer program, control module, and facility are also described.

## Claims

### Claim 1

A method for managing an electrical energy generation facility comprising:
an electrical energy generation device,
an electrical energy storage device adapted for storing electrical energy generated by the electrical energy generation device and for outputting electrical energy to equipment connected to said facility,
a control module configured for controlling the charging and discharging of the storage device,
the method comprising the steps of:
evaluating an electricity generation capacity of the generation device for a given period,
determining a weighted generation capacity on the basis of said evaluated electricity generation capacity and at least one electricity generation capacity of said generating device evaluated over a period prior to said given period,
determining, for a period subsequent to the given period, a discharge limit of the storage device on the basis of said weighted generation capacity, and
during the subsequent period, limiting an amount of electricity output to the connected equipment on the basis of the discharge limit,
wherein the given period comprises at least a first period during which the control module operates in a first mode of operation in which the control module does not apply control settings adapted for regulating the electrical energy generated by the generation device and supplied to the storage device, and at least a second period during which the control module operates in a second mode of operation in which the control module applies at least one charge control setting, and
wherein the electricity generation capacity for the given period is evaluated on the basis of:
the current supplied by the generation device during at least one first period, and the duration of the at least one first period, and
the duration of at least one second period, and, for each second period considered, the current supplied by the generation device during a third period following said second period considered and during which the control module operates in the first mode of operation.

### Claim 2 (depends on 1)

The method according to claim 1, wherein, during the subsequent period, the amount of electricity output to the connected equipment is limited to the value of the discharge limit determined for said subsequent period.

### Claim 3 (depends on 1)

The method according to claim 1, wherein, during the subsequent period, the amount of electricity output to the connected equipment is limited to the sum of the discharge limit determined for said subsequent period and a value representative of the difference between the discharge limit during at least one period prior to said subsequent period and the amount of electricity output to the connected equipment at the end of said prior period.

### Claim 4 (depends on 1)

The method according to claim 1, wherein, during said subsequent period, a display device is controlled to display an amount of electricity remaining for the subsequent period, said amount of remaining electricity being determined from the difference between said discharge limit and the amount of electricity output to the equipment connected to the facility during the subsequent period.

### Claim 5 (depends on 1)

The method according to claim 1, wherein the duration of a third period is between 10−3 and 10 seconds.

### Claim 6 (depends on 1)

The method according to claim 1, wherein the weighted generation capacity for the given period is determined from the relation:
Cp(t)=Σi=0kai(t)C(t−i)
where Cp is the weighted generation capacity, t is the given period, t−i is a period prior to the given period, C(t−i) is the generation capacity during period t−i, k is a nonzero number of periods including period t for which the generation capacity of the generation device is taken into account when evaluating the weighted generation capacity for the given period, and ai(t) denotes a non-zero weighting factor for the generation capacity C(t−i) of period t−i.

### Claim 7 (depends on 6)

The method according to claim 6, wherein the weighted capacity is evaluated from the relation:
Cp(t)=a(t)*C(t)+(1−a(t))*Cp(t−1),
where a(t) is a factor between 0 and 1.

### Claim 8 (depends on 1)

The method according to claim 1, wherein the discharge limit of the subsequent period is determined to be less or equal to the ratio Cp(t)/c(t), where t is the given period, Cp(t) is the weighted generation capacity for the given period, and c(t) is a charge coefficient of the storage device for the given period.

### Claim 9 (depends on 8)

The method according to claim 8, wherein the discharge limit is determined from the relation:
LimDech(t+1)=Cp(t)/(c(t)*s(t)),
where LimDech is the discharge limit, t+1 denotes the period subsequent to the given period, and s(t) is a safety coefficient for the given period which is greater than or equal to 1.

### Claim 10 (depends on 1)

A non-transitory computer program product comprising instructions for implementing the method according to claim 1, when the program is executed by a processor.

### Claim 11

A method for managing an electrical energy generation facility comprising:
an electrical energy generation device,
an electrical energy storage device adapted for storing electrical energy generated by the electrical energy generation device and for outputting electrical energy to equipment connected to said facility,
a control module configured for controlling the charging and discharging of the storage device,
the method comprising the steps of:
evaluating an electricity generation capacity of the generation device for a given period,
determining a weighted generation capacity on the basis of said evaluated electricity generation capacity and at least one electricity generation capacity of said generating device evaluated over a period prior to said given period,
determining, for a period subsequent to the given period, a discharge limit of the storage device on the basis of said weighted generation capacity, and
during the subsequent period, limiting an amount of electricity output to the connected equipment on the basis of the discharge limit,
wherein the weighted generation capacity for the given period is determined from the relation:
Cp(t)=Σi=0kai(t)C(t−i)
where Cp is the weighted generation capacity, t is the given period, t−i is a period prior to the given period, C(t−i) is the generation capacity during period t−i, k is a nonzero number of periods including period t for which the generation capacity of the generation device is taken into account when evaluating the weighted generation capacity for the given period, and ai(t) denotes a non-zero weighting factor for the generation capacity C(t−i) of period t−i, and
wherein the weighted capacity is evaluated from the relation:
Cp(t)=a(t)*C(t)+(1−a(t))*Cp(t−1),
where a(t) is a factor between 0 and 1.

### Claim 12

A method for managing an electrical energy generation facility comprising:
an electrical energy generation device,
an electrical energy storage device adapted for storing electrical energy generated by the electrical energy generation device and for outputting electrical energy to equipment connected to said facility,
a control module configured for controlling the charging and discharging of the storage device,
the method comprising the steps of:
evaluating an electricity generation capacity of the generation device for a given period,
determining a weighted generation capacity on the basis of said evaluated electricity generation capacity and at least one electricity generation capacity of said generating device evaluated over a period prior to said given period,
determining, for a period subsequent to the given period, a discharge limit of the storage device on the basis of said weighted generation capacity, and
during the subsequent period, limiting an amount of electricity output to the connected equipment on the basis of the discharge limit,
wherein the discharge limit of the subsequent period is determined to be less or equal to the ratio Cp(t)/c(t), where t is the given period, Cp(t) is the weighted generation capacity for the given period, and c(t) is a charge coefficient of the storage device for the given period.