Reactive power optimization method for power system based on distributed interval optimization, and computer medium

Patent metadata

Field	Value
Publication number	US-12489294-B1
Application number	US-202519214140-A
Country	US
Kind code	B1
Filing date	May 21, 2025
Priority date	Dec 19, 2024
Publication date	Dec 2, 2025
Grant date	Dec 2, 2025

Abstract

The provided is a reactive power optimization method for a power system based on distributed interval optimization, including following steps: S 1 . constructing a first model, where the first model includes an interval reactive power optimization model of a power system with a high renewable energy penetration rate, and the interval reactive power optimization model includes an objective function, a first constraint, and a constraint of an interval power flow equation; S 2 . obtaining a first state variable interval based on the constraint of interval power flow equation and a distributed interval power flow algorithm; S 3 . Converting the first model based on the first state variable interval and a security limit definition method, and obtaining a second model, where the second model includes a deterministic optimization model; and S 4 . obtaining a voltage and reactive power control strategy based on the second model and a primal-dual interior point method.

First claim

What is claimed is:

1 . A reactive power optimization method for a power system based on distributed interval optimization, comprising following steps:
S 1 , constructing a first model, wherein the first model comprises an interval reactive power optimization model of a power system with a high renewable energy penetration rate, and the interval reactive power optimization model comprises an objective function, a first constraint, and a constraint of an interval power flow equation, wherein the objective function comprises a network loss of the power system:

min
⁢

P
loss

=

∑

i
∈
S

∑

j
∈
S

V
i

⁢

V
j

⁢

G

i
⁢
j

⁢
cos
⁢

θ

i
⁢
j

wherein S represents a set of all buses in the power system; i and j respectively represent a bus i and a bus j; V i and V j respectively represent voltage amplitudes of the bus i and the bus j, G ij represents a real part of a system bus admittance matrix; and θ ij =θ i −θ j , wherein θ i and θ j respectively represent voltage phase angles of the bus i and the bus j;
S 2 , obtaining a first state variable interval based on the constraint of the interval power flow equation and a distributed interval power flow algorithm, wherein
the S 2 comprises:
processing the constraint of the interval power flow equation based on the distributed interval power flow algorithm;
assuming that a total quantity of buses in the power system is n, and a total quantity of generator buses excluding a slack bus is r, representing a state variable V i , a state variable θ i , and a state variable Q Gi in the constraint of the interval power flow equation as affine forms, wherein a first affine expression for the state variable V i , a first affine expression for the state variable θ i , and a first affine expression for the state variable Q Gi comprise:

V
i

=

V
i
0

+

∑
n

j
=
2

V

i
,
j

P

⁢

ε

j
⁢
1

P

+

∑
n

j
=

r
+
2

V

i
,
j

Q

⁢

ε

j
⁢
1

Q

,

i
∈

S
L

θ
i

=

θ
i
0

+

∑

j
=
2

n

θ

i
,
j

P

⁢

ε

j
⁢
2

P

+

∑

j
=

r
+
2

n

θ

i
,
j

Q

⁢

ε

j
⁢
2

Q

,

i
∈

S
G

Assignees

• Univ Hunan

Inventors

• Zhang Cong
• Liu Qian
• Li Jiayong
• Wang Dapeng
• Yang Huaizhi
• Shuai Zhikang
• Zhu Lipeng
• Zhou Bin
• Li Bingxu

Classifications

• H02J2103/30

  Simulating, planning, modelling, reliability check or computer assisted design [CAD] of electric power networks · CPC title

• H02J2101/20

  Dispersed power generation using renewable energy sources · CPC title

• H02J2103/35

  Grid-level management of power transmission or distribution systems, e.g. load flow analysis or active network management · CPC title

• H02J3/381

  Dispersed generators · CPC title

• H02J3/50

  Controlling the sharing of reactive power · CPC title