Method of controlling an electrical production station

Patent metadata

Field	Value
Publication number	US-10355486-B2
Application number	US-201715695290-A
Country	US
Kind code	B2
Filing date	Sep 5, 2017
Priority date	Sep 7, 2016
Publication date	Jul 16, 2019
Grant date	Jul 16, 2019

Abstract

A method of controlling an electricity production station including at least one renewable energy source and an energy accumulation system, allowing an operator to commit, at an electrical distribution network manager, to a power profile PG that the station will be able to deliver over a forthcoming time period. The declared power profile must, furthermore, comply with constraints imposed by the manager of the electricity distribution network. Non-compliance with this commitment may be subject to penalties. It is then incumbent on the operator to best optimize the method of controlling the electricity production station so as to maximize the electrical power fed into the network, while complying, in so far as possible, over a certain tolerance range, with the power profile commitment PG.

First claim

The invention claimed is:

1. A method of controlling an electrical energy production station comprising at least one renewable energy source, and at least one energy accumulation system, the method comprising:
a step of determining, via an optimal module, a power profile P G to be declared, the power profile P G being a profile of a power intended to be delivered over a time period T, starting at an instant t 0 , by the electrical energy production station, the power profile P G being determined with respect to a power profile production forecast P RP for at least one renewable energy source, and corresponding to a power profile P(t) for maximizing an objective function F of the form:

F
=

∑

t
=

t
0

t
0

+
T

⁢

(

P
⁡

(
t
)

-

ρ
·



S
⁢

⁢
O
⁢

⁢

C
⁡

(
t
)

-

θ
1

·

C
bat



)

P(t) being a power at an instant t of the period T, SOC(t) a state of charge, which is adjustable, of the energy accumulation system at an instant t of the period T, ρ is a weighting factor, and C bat being the capacity of the energy accumulation system,
the power profile P G being subjected to a constraint of the form:
P G ≤θ 2 ·P R −P bat

P bat being the power consumed by the energy accumulation system,
the quantities θ 1 and θ 2 corresponding to components of a design predetermined vector θ.

2. The method according to claim 1 , wherein the method further comprises a regulation step, undertaken by a real-time module, intended to adjust, in real-time, the state of charge SOC(t) such as to regulate a power P E , actually delivered by the electrical energy production station, compliant, and in a given tolerance range, with the power profile P G .

3. The method according to claim 1 , wherein the state of charge SOC(t) of the energy accumulation system must comply with the following constraint for each instant t of the period T:
0.05· C bat ≤SOC( t )≤0.95· C bat .

4. The method according to claim 1 , wherein the power P bat consumed by the energy accumulation system is kept between a minimum power P batmin and a maximum power P batmax .

5. The method according to claim 1 , wherein the state of charge SOC(t) at each instant t varies according to a linear function of the consumed power P bat , advantageously, the state of charge SOC(t) is such that:

S
⁢

⁢
O
⁢

⁢

C
⁡

(
t
)

=

S
⁢

⁢
O
⁢

⁢

C
0

+

α
·

∑

τ
=

t
0

t

⁢

P
bat
τ

SOC 0 being the state of charge at the instant t 0 , P bat τ being the power consumed by the accumulation system at the instant τ, and a α characteristic fixed parameter of the energy accumulation system.

6. The method according to claim 1 , wherein the slope at any point of the power profile P G is bounded by a negative slope dP G− and a positive slope dP G+ .

7. The method of determining a design vector θ intended to be implemented according to claim 1 , associated with an electrical energy production station comprising at least one renewable energy source and at least one energy accumulation system, the method comprising:
a) a step of selecting, over a past period Tp starting at an instant t 0 , a power profile production forecast P RP , for the least one renewable energy source,
b) a step of calculating, for the power profile production prediction P RP , a number n, which is an integer, of power profiles P Ri , with i varying between 1 and n, the power profiles P Ri each accounting for an uncertainty affecting the forecast P RP ,
c) a step of defining a first set of m values θ 1,l , l being an integer varying between 1 and m, and a second set of p values θ 2,k , k being an integer varying between 1 and p,
d) a step of calculating, for the period Tp, for each of the m*p pairs of values (θ 1,l , θ 2,k ), l and k varying between 1 and m, and between 1 and p, respectively, a power profile P(t) l,k , noted as P G,l,k and maximizing a function F l,k

F

l
,
k

Assignees

• Schneider Electric Ind Sas

Inventors

• Pflaum Peter
• Alamir Mazen

Classifications

• H02J3/003

  Load forecast, e.g. methods or systems for forecasting future load demand · CPC title

• H02J3/381

  Dispersed generators · CPC title

• H02J2101/20

  Dispersed power generation using renewable energy sources · CPC title

• H02J3/32 Primary

  using batteries or super capacitors with converting means · CPC title

• G05F1/66

  Regulating electric power · CPC title