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An optimal scheduling method for power grids with pumped-storage units

A pumped-storage unit and optimal dispatching technology, applied in circuit devices, AC network circuits, AC network load balancing, etc., can solve problems such as not fully considering various constraints, achieve good engineering practical value, and the solution results are reasonable and correct. , the effect of fast calculation

Active Publication Date: 2021-04-16
SHENZHEN POWER SUPPLY BUREAU +1
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide an optimal scheduling method for power grids with pumped storage units, improve the existing optimal scheduling methods that do not fully consider various constraints, and use a mixed integer linear programming model to solve the problem to achieve The result is more accurate

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  • An optimal scheduling method for power grids with pumped-storage units
  • An optimal scheduling method for power grids with pumped-storage units
  • An optimal scheduling method for power grids with pumped-storage units

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Embodiment Construction

[0050] The following descriptions of various embodiments refer to the accompanying drawings to illustrate specific embodiments in which the present invention can be implemented.

[0051] An embodiment of the present invention provides a method for optimal dispatching of a power grid with pumped storage units, the main steps of which are as follows figure 1 shown, may include:

[0052] Step S1, with the goal of minimizing the operating costs of all units, an objective function model is established:

[0053]

[0054] Among them, T is the total number of time slots in the scheduling cycle, N 1 is the total number of conventional thermal power units (including coal-fired and gas-fired units), C iU,t and C iD,t are the startup and shutdown costs of conventional thermal power unit i in time period t, F i,t is the power generation cost of conventional thermal power unit i in time period t; N 2 is the total number of pumped storage units, C sU,t and C sD,t are the start-up a...

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Abstract

The invention provides a method for optimal dispatching of a power grid with pumped storage units. The steps include: step 1, aiming at minimizing the operating costs of all units, and establishing an objective function model; step 2, according to the power grid system with pumped storage units Set various constraint conditions in daily actual working conditions; step 3, obtain the mixed integer nonlinear programming model of power grid optimal dispatching according to the objective function model and various constraint conditions, and linearize the nonlinear part in the model to obtain the power grid optimization Scheduling mixed integer linear programming model; step 4, calling the mathematical optimization toolkit CPLEX solver to solve the mixed integer linear programming model. The scheduling method considers the start-up and shutdown costs of each unit and the spinning reserve capacity constraints that the pumped storage unit can provide under different operating conditions, and linearizes the expression to transform the model into a mixed integer linear programming model. The solver is fast and reliable, and has good engineering practical value.

Description

technical field [0001] The invention relates to the technical field of short-term power generation optimal dispatching in electric power systems, in particular to a method for optimal dispatching of a power grid including a pumped storage unit. Background technique [0002] Power generation optimization scheduling of power system refers to formulating a reasonable start-up and shutdown plan and output plan for each generator combination under the conditions of satisfying various operating constraints of the system, with the goal of minimizing the total operating cost, which is the core link of the short-term power generation plan of the power grid. This problem is also known as the safety-constrained unit combination problem. From a mathematical point of view, the safety-constrained unit combination problem is an NP-hard (non-deterministic polynomial) problem, and it is currently difficult to find the optimal solution in a reasonable time. At present, experts at home and ab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/46H02J3/28G06Q10/04G06Q50/06
CPCG06Q10/04G06Q50/06H02J3/28H02J3/46H02J3/003H02J2203/20
Inventor 卢艺卢苑梁俊文祝宇翔白恒远翁毅选林舜江刘明波
Owner SHENZHEN POWER SUPPLY BUREAU
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