Dispatching method and device for integrated transmission and distribution network

Patent metadata

Field	Value
Publication number	US-11239658-B2
Application number	US-202016736313-A
Country	US
Kind code	B2
Filing date	Jan 7, 2020
Priority date	Oct 22, 2018
Publication date	Feb 1, 2022
Grant date	Feb 1, 2022

Abstract

The present disclosure provides a dispatching method and a dispatching device for an integrated transmission and distribution network. The integrated transmission and distribution network include a transmission network and at least one distribution network. The method includes: establishing a dispatch model of the integrated transmission and distribution network; solving the dispatch model to obtain dynamic dispatch parameters for the integrated transmission and distribution network, in which the dynamic dispatch parameters comprise a boundary transferred power from the transmission network to each of the at least one distribution network, and power outputs of all generators in the transmission network and each of the at least one distribution network; and dispatching the integrated transmission and distribution network based on the boundary transferred power and the power outputs of all the generators in the transmission network and each of the at least one distribution network.

First claim

What is claimed is:

1. A dispatching method for an integrated transmission and distribution network, wherein the integrated transmission and distribution network comprises a transmission network and at least one distribution network, and the method comprises:
establishing a dispatch model of the integrated transmission and distribution network, wherein the dispatch model comprises an objective function and constraints, the objective function is a minimizing function of a total generation cost of the transmission network and the at least one distribution network under the constraints, wherein the total generation cost of the transmission network and the at least one distribution network is established by a formula of:

∑

t
∈
T

⁢

⁢

∑

i
∈

G
trans

⁢

⁢

C
i
trans

⁡

(

pg

i
,
t

trans

)

+

∑

t
∈
T

⁢

⁢

∑

k
∈
DIST

⁢

⁢

∑

i
∈

G

dist
,
k

⁢

⁢

C
i

dist
,
k

⁡

(

pg

i
,
t

dist
,
k

)

,

(
1
)

where, T is an index set of dispatching, G trans is an index set of generator bus numbers in the transmission network, DIST is an index set of the at least one distribution network, G dist,k is an index set of generator bus numbers in a distribution network k, C i trans (pg i,t trans ) is a cost function of a generator at a bus i of the transmission network during a dispatch period t, pg i,t trans is an active power output of the generator at the bus i of the transmission network during the dispatch period t, C i dist,k (pg i,t dist,k ) is a cost function of a generator at a bus i of the distribution network k during the dispatch period t, pg i,t dist,k is an active power output of the generator at the bus i of the distribution network k during the dispatch period t;
solving the dispatch model to obtain dynamic dispatch parameters for the integrated transmission and distribution network, wherein the dynamic dispatch parameters comprise a boundary transferred power from the transmission network to each of the at least one distribution network, and power outputs of all generators in the transmission network and each of the at least one distribution network; and
dispatching the integrated transmission and distribution network based on the boundary transferred power and the power outputs of all the generators in the transmission network and each of the at least one distribution network,
wherein C i trans (pg i,t trans ) is expressed as:
C i trans ( pg i,t trans )= a 0,i trans +a 1,i trans pg i,t trans +a 2,i trans (pg i,t trans ) 2   (2),

where, a 0,i trans is a constant coefficient of generation cost of the generator at the bus i of the transmission network, a 1,i trans is a linear coefficient of generation cost of the generator at the bus i of the transmission network, and a 2,i trans is a quadratic coefficient of generation cost of the generator at the bus i of the transmission network.

2. The method according to claim 1 , wherein C i dist,k (pg i,t dist,k ) is expressed as:
C i dist,k ( pg i,t

Assignees

• Univ Tsinghua

Inventors

• Wu Wenchuan
• Wang Bin
• Lin Chenhui
• Zhang Boming
• Sun Hongbin
• Guo Qinglai

Classifications

• H02J2103/30

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

• H02J2103/35

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

• H02J3/007

  Arrangements for selectively connecting one or more loads to one or more power sources or power lines · CPC title

• Y04S10/50

  Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications · CPC title

• Y02E60/00

  Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation · CPC title