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US 11,152,786 B2Granted
Dispatch method and device for power system
AssigneeTsinghua University
InventorsZhifang Yang, Haiwang Zhong, Qing Xia, Chunling Lu, Xiaowen Lai, Yang Wang
Life of this patent
Estimating the term…
Abstract
A dispatch method and device for a power system are provided. The method includes: establishing an optimal power flow model, the optimal power flow model includes an objective function and constraints, the objective function is configured to indicate a minimum total cost of active power production and reactive power production of generators; solving the optimal power flow model to obtain dispatch parameters for the power system; and dispatching the power system based on the dispatch parameters.
Claims15
A dispatch method for a power system, comprising:
- establishing an optimal power flow model, wherein the optimal power flow model comprises an objective function and constraints, the objective function is configured to indicate a minimum total cost of active power production and reactive power production of generators;
- solving the optimal power flow model to obtain dispatch parameters for the power system;
- and
- dispatching the power system based on the dispatch parameters,
- wherein the constraints comprise a power flow equation constraint, a startup mode of the optimal power flow model comprises a cold-start mode and a hot-start mode,
- the power flow equation constraint is expressed by:
- P
- ij
- =
- g
- ij
-
- v
- i
- 2
- -
- g
- ij
- ,
- k
- P
-
- v
- i
- 2
- +
- v
- j
- 2
- 2
- -
- b
- ij
- ,
- k
- P
-
- (
- θ
- ij
- -
- θ
- ij
- ,
- k
- )
- +
- g
- ij
- ,
- k
- P
-
- v
- ij
- ,
- L
- s
- +
- θ
- ij
- ,
- L
- s
- 2
- ;
- Q
- ij
- =
- -
- b
- ij
-
- v
- i
- 2
- +
- b
- ij
- ,
- k
- Q
-
- v
- i
- 2
- +
- v
- j
- 2
- 2
- -
- g
- ij
- ,
- k
- Q
-
- (
- θ
- ij
- -
- θ
- ij
- ,
- k
- )
- -
- b
- ij
- ,
- k
- Q
-
- v
- ij
- ,
- L
- s
- +
- θ
- ij
- ,
- L
- s
- 2
- ;
- where Pij denotes an active power flow of a branch (i, j), Qij denotes a reactive power flow of the branch (i, j), vi denotes a voltage magnitude of a bus i, vj denotes a voltage magnitude of a bus j, θi denotes a voltage angle of the bus i, θj denotes a voltage angle of the bus j, vij denotes a voltage magnitude difference between the bus i and the bus j of the branch (i, j), vij=vi−vj, θij denotes a voltage angle difference between the bus i and the bus j of the branch (i, j), θij=θi−θj, gij,kP and bij,kP denote the active balance coefficients of kth iteration, bij,kQ and gij,kQ denote reactive balance coefficients of kth iteration, vij,Ls denotes an effect of voltage magnitude on network loss, θij,Ls denotes an effect of voltage angle on the network loss, k is an integer greater than or equal to 0.
125 more elements
A dispatch device for a power system, comprising:
- a processor;
- a memory configured to store an instruction executable by the processor;
- wherein the processor is configured to:
- establish an optimal power flow model, wherein the optimal power flow model comprises an objective function and constraints, the objective function is configured to indicate a minimum total cost of active power production and reactive power production of generators;
- solve the optimal power flow model to obtain dispatch parameters for the power system;
- and
- dispatch the power system based on the dispatch parameters,
- wherein the constraints comprise a power flow equation constraint, a startup mode of the optimal power flow model comprises a cold-start mode and a hot-start mode,
- the power flow equation constraint is expressed by:
- P
- ij
- =
- g
- ij
-
- v
- i
- 2
- -
- g
- ij
- ,
- k
- P
-
- v
- i
- 2
- +
- v
- j
- 2
- 2
- -
- b
- ij
- ,
- k
- P
-
- (
- θ
- ij
- -
- θ
- ij
- ,
- k
- )
- +
- g
- ij
- ,
- k
- P
-
- v
- ij
- ,
- L
- s
- +
- θ
- ij
- ,
- L
- s
- 2
- ;
- Q
- ij
- =
- -
- b
- ij
-
- v
- i
- 2
- +
- b
- ij
- ,
- k
- Q
-
- v
- i
- 2
- +
- v
- j
- 2
- 2
- -
- g
- ij
- ,
- k
- Q
-
- (
- θ
- ij
- -
- θ
- ij
- ,
- k
- )
- -
- b
- ij
- ,
- k
- Q
-
- v
- ij
- ,
- L
- s
- +
- θ
- ij
- ,
- L
- s
- 2
- ;
- where Pij denotes an active power flow of a branch (i, j), Qij denotes a reactive power flow of the branch (i, j), vi denotes a voltage magnitude of a bus i, vj denotes a voltage magnitude of a bus j, θi denotes a voltage angle of the bus i, θj denotes a voltage angle of the bus j, vij denotes a voltage magnitude difference between the bus i and the bus j of the branch (i, j), vij=vi−vj, θij denotes a voltage angle difference between the bus i and the bus j of the branch (i, j), θij=θi−gij,kP and bij,kP denote active balance coefficients of kth iteration, bij,kQ and gij,kQ denote reactive balance coefficients of kth iteration, vij,Ls denotes an effect of voltage magnitude on network loss, θij,Ls denotes an effect of voltage angle on the network loss, k is an integer greater than or equal to 0.
128 more elements
A non-transitory computer-readable storage medium having stored therein instructions that, when executed by a processor of a terminal, causes the terminal to perform a dispatch method for a power system, the dispatch method comprising:
- establishing an optimal power flow model, wherein the optimal power flow model comprises an objective function and constraints, the objective function is configured to indicate a minimum total cost of active power production and reactive power production of generators;
- solving the optimal power flow model to obtain dispatch parameters for the power system;
- and
- dispatching the power system based on the dispatch parameters,
- wherein the constraints comprise a power flow equation constraint, a startup mode of the optimal power flow model comprises a cold-start mode and a hot-start mode,
- the power flow equation constraint is expressed by:
- P
- ij
- =
- g
- ij
-
- v
- i
- 2
- -
- g
- ij
- ,
- k
- P
-
- v
- i
- 2
- +
- v
- j
- 2
- 2
- -
- b
- ij
- ,
- k
- P
-
- (
- θ
- ij
- -
- θ
- ij
- ,
- k
- )
- +
- g
- ij
- ,
- k
- P
-
- v
- ij
- ,
- L
- s
- +
- θ
- ij
- ,
- L
- s
- 2
- ;
- Q
- ij
- =
- -
- b
- ij
-
- v
- i
- 2
- +
- b
- ij
- ,
- k
- Q
-
- v
- i
- 2
- +
- v
- j
- 2
- 2
- -
- g
- ij
- ,
- k
- Q
-
- (
- θ
- ij
- -
- θ
- ij
- ,
- k
- )
- -
- b
- ij
- ,
- k
- Q
-
- v
- ij
- ,
- L
- s
- +
- θ
- ij
- ,
- L
- s
- 2
- ;
- where Pij denotes an active power flow of a branch (i, j), Qij denotes a reactive power flow of the branch (i, j), vi denotes a voltage magnitude of a bus i, vj denotes a voltage magnitude of a bus j, θi denotes a voltage angle of the bus i, θj denotes a voltage angle of the bus j, vij denotes a voltage magnitude difference between the bus i and the bus j of the branch (i, j), vij=vi−vj, θij denotes a voltage angle difference between the bus i and the bus j of the branch (i, j), θij=θi−θj, gij,kP and bij,kP denote active balance coefficients of kth iteration, bij,kQ and gij,kQ denote reactive balance coefficients of kth iteration, vij,Ls denotes an effect of voltage magnitude on network loss, θij,Ls denotes an effect of voltage angle on the network loss, k is an integer greater than or equal to 0.
125 more elements
Dependencies are inferred from the claim text.