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Power optimization method for cross-area DC tie-lines considering the number of reactive equipment actions

A technology of tie line power and number of actions, applied to AC network circuits, power transmission AC networks, circuit devices, etc., can solve the problems of insufficient consideration of various factors, rough modeling of reactive equipment actions, etc., and achieve economical operation performance, improve economy and safety, and promote the effect of consumption

Active Publication Date: 2021-03-30
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

Although Document 2 considers the action of reactive power equipment, its modeling of the action of reactive power equipment on both sides of the DC is very rough, and does not fully consider the factors that affect the action of reactive power equipment

Method used

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  • Power optimization method for cross-area DC tie-lines considering the number of reactive equipment actions
  • Power optimization method for cross-area DC tie-lines considering the number of reactive equipment actions
  • Power optimization method for cross-area DC tie-lines considering the number of reactive equipment actions

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Embodiment Construction

[0026] Such as figure 1 As shown, a cross-area DC tie-line power optimization method that takes into account the number of actions of reactive power equipment includes the following steps:

[0027] (1) Based on the DC power flow, the main problem model of cross-regional DC tie-line power optimization is established, and the reactive device action constraints are introduced to control the action times of the reactive devices, mainly including the reactive device connection constraints and the reactive device action times constraints.

[0028] (2) Establish a sub-problem model for the power flow optimization of cross-regional DC tie-lines to ensure that the optimal solution of the main problem satisfies the safety constraints. Device connectivity constraints are linked to the main problem.

[0029] (3) The sub-problem feeds back the Benders feasibility constraints to the main problem, and corrects the optimization space of the main problem.

[0030] Preferably, based on the st...

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Abstract

The invention belongs to the technical field of power system operation and dispatching, and in particular relates to a power optimization method for a cross-area DC tie-line considering the number of actions of reactive equipment, including: establishing a main problem model for power optimization of a cross-area DC tie-line based on the DC power flow, through The number of actions of reactive power equipment is constrained to control the number of actions of reactive power equipment; a power flow check sub-problem model is established to ensure that the optimal solution of the main problem satisfies the safety constraints and the steady-state operating characteristics of the converter station, and the reactive power sub-problems are respectively established in the main sub-problem The equipment connection constraints realize the unification of the reactive equipment solutions of the master and subproblems. The Benders decomposition method is used to iteratively optimize the main problem and sub-problems, and the sub-problems feed back the feasibility constraints to the main problem to modify the optimization space of the main problem. The invention fully taps the coordination and optimization benefits between the flexible adjustment capability of the DC tie line and the DC reactive power adjustment characteristics, and at the same time promotes the wind power consumption of the sending end power grid, reduces the peak regulation pressure of the thermal power unit, and realizes the operation economy of the DC cross-regional interconnection grid sex.

Description

technical field [0001] The invention belongs to the technical field of electric power system operation and dispatching, and in particular relates to a power optimization method of a cross-area DC tie line taking into account the number of actions of reactive power equipment. Background technique [0002] Most of the large-scale wind power bases in my country are far away from the load center, and it is difficult to consume them locally. Therefore, they need to be transported to the load center through high-voltage direct current transmission to realize the cross-regional consumption of wind power and promote the optimal allocation of resources. The traditional DC day-ahead transmission plan is compiled based on the load peak-valley difference of the receiving-end power grid, which will not only cause wind curtailment in the sending-end power grid, but also increase the peak-shaving pressure of thermal power units in the sending-end power grid. The flexible adjustment of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/36H02J3/38
CPCH02J3/36H02J3/381H02J2203/20Y02E10/76Y02E60/60
Inventor 张海波申杰
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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