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Day-ahead power system economical dispatching method

A technology of power system and economic dispatch, applied in the field of power system, can solve the problems of economic dispatch model to improve calculation efficiency, etc.

Active Publication Date: 2014-01-29
CHINA ELECTRIC POWER RES INST +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] At present, the optimization solution of the day-ahead economic dispatch linear model commonly used at home and abroad is mostly calculated by commercial mathematical software, which is general-purpose software, and does not improve the calculation efficiency for the particularity of the economic dispatch model

Method used

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Embodiment 1

[0063] Embodiment 1 of a method for economic scheduling of a day-ahead power system provided by the present invention is an embodiment of a method for economic scheduling of a day-ahead power system.

[0064] Specifically, in step S2, the constraints established to make the power system satisfy the load balance constraints, generating unit operation constraints, and contract power constraints include unit cost constraints, system load balance constraints, unit output upper and lower limit constraints, unit ramp constraints, and contract power constraints .

[0065] The operating cost C of generator set i in period t i [p i (t)] is usually a quadratic function: C i [p i (t)] = a i p i 2 (t)+b i p i (t)+c i , where a i , b i , c i is an unknown quadratic function coefficient.

[0066] The operating cost C of generator set i in period t i [p i (t)]’s quadratic function is linearized piecewise. When there are enough segments, the quadratic curve of the original quad...

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Abstract

The invention provides a day-ahead power system economical dispatching method which includes the following steps: step S1, modeling a linear programming mathematical model of the day-ahead power system economical dispatching method; step S2, building constraint conditions which enables the power system to satisfy a load balancing constraint, a machine group operating constraint and a contract power constraint, and forming a constraint matrix A by ordering the constraint conditions according to an attribute of variable relating to each constraint condition; step S3, using a predictor-corrector interior point method to get a result which can satisfy the constraint matrix A of an objective function, wherein the objective function of the mathematical model is that T is session number in the period of system dispatching, M is set number of system generators, pi (t) is active power of generator set i in a t period, and Ci [pi (t)] is an operating cost of the generator set i in the t period. The day-ahead power system economical dispatching method uses the predictor-corrector interior point method to solve and the predictor-corrector interior point method is low in an initial point requirement, good in astringency and rapid in astringency speed.

Description

technical field [0001] The invention relates to the field of electric power systems, in particular to a method for economical scheduling of electric power systems. Background technique [0002] With the advancement of smart grid construction, the requirements for optimal allocation of power grid resources are constantly increasing, which puts forward higher requirements for dispatching operations and dispatching plans. The day-ahead economic dispatch method is based on the daily unit start-stop power generation plan determined by the unit combination in the day-ahead, with the goal of the minimum system, and according to the ultra-short-term forecast load, real-time adjustment of unit output to meet the load balance constraints, unit operation constraints and contract power constraints. Realize energy saving and economic scheduling. In recent years, day-ahead economic dispatching has been successfully applied in the field of real-time dispatching in foreign countries, and t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/04G06Q50/06
CPCY04S10/54Y04S10/50
Inventor 蔡帜周京阳潘毅戴赛崔晖许丹
Owner CHINA ELECTRIC POWER RES INST
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