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A Fast Calculation Method of Unit Combination Based on Feature Dispatching Points

A unit combination and fast calculation technology, applied in the field of power system, can solve problems such as insufficient operation feature extraction, difficulty in obtaining scheduling scheme, and inability to directly apply, and achieve the effect of high solution efficiency.

Active Publication Date: 2021-06-22
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing fast calculation methods based on aggregated generators or aggregated scheduling periods are insufficient for extracting operating features, and it is difficult to obtain the original high-granularity scheduling scheme. Therefore, they are usually used in long-term planning that does not require high accuracy and cannot be directly applied day-ahead schedule

Method used

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  • A Fast Calculation Method of Unit Combination Based on Feature Dispatching Points
  • A Fast Calculation Method of Unit Combination Based on Feature Dispatching Points
  • A Fast Calculation Method of Unit Combination Based on Feature Dispatching Points

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0132] see figure 1 , a fast unit combination method based on characteristic scheduling points, which mainly includes the following steps:

[0133] 1) Establish the combined operation optimization model of generating units in groups, and select the characteristic dispatch points of the power network.

[0134] Further, the main steps of selecting feature scheduling points are as follows:

[0135] 1.1) Put T N The original scheduling point of each unit is divided into T N / m groups, each group has m unit scheduling points.

[0136] 1.2) To establish the combined operation optimization model of any group of dispatching point generating units, the main steps are as follows:

[0137] 1.2.1) With the minimum total operating cost as the goal, establish the objective function, namely:

[0138]

[0139] In the formula, Indicates the primary generation cost; Indicates the no-load cost; is a continuous variable representing generator output, is an integer variable represe...

Embodiment 2

[0254] A method for fast unit combination based on characteristic scheduling points mainly includes the following steps:

[0255] 1) Establish the combined operation optimization model of generating units in groups, and select the characteristic dispatch points of the power network.

[0256] 2) Determine the combined operating state of the generating units at the characteristic dispatch point and the non-characteristic dispatch point.

[0257] 3) Iteratively correct the combined operation status of the generator sets at the characteristic dispatch points and non-characteristic dispatch points, and obtain the combined operation results of the generator sets in the power network.

Embodiment 3

[0259] A method for fast combination of units based on characteristic scheduling points, the main steps are shown in Embodiment 2, wherein the main steps of selecting characteristic scheduling points are as follows:

[0260] 1) Put T N The original scheduling point of each unit is divided into T N / m groups, each group has m unit scheduling points.

[0261] 2) To establish the combined operation optimization model of any group of dispatching point generating units, the main steps are as follows:

[0262] 2.1) With the goal of minimizing the total operating cost, establish an objective function, namely:

[0263]

[0264] In the formula, Indicates the primary generation cost; Indicates the no-load cost; is a continuous variable representing generator output, is an integer variable representing the start-stop state of the generator; A 1,i and A 2,i Respectively represent the primary generation cost coefficient and no-load cost coefficient, i is the serial number of...

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Abstract

The invention discloses a method for fast combination of generating units based on characteristic dispatching points. The main steps are: 1) establishing a combined operation optimization model of generator sets, and selecting characteristic dispatching points of the power network; 2) determining characteristic dispatching points and non-characteristic dispatching points 3) Iteratively correct the combined operating state of the generator sets at the characteristic dispatch points and non-characteristic dispatch points, and obtain the combined operation results of the generator sets in the power network. The invention solves the problem that the calculation amount is too large due to the increase of the granularity of the scheduling period in the existing unit combination problem in the day-ahead scheduling.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a fast calculation method for unit combinations based on characteristic dispatch points. Background technique [0002] At present, the scale of renewable energy power generation is increasing, which brings many uncertainties to the optimization of power system operation. In order to ensure a safer and more economical operation of the power system, the granularity of the power system's dispatching time should be improved. Organizations such as the United States Energy Regulatory Commission have suggested increasing the time granularity of existing unit combinations and economic dispatch, that is, improving dispatch from every 60 minutes to every 15 minutes. MISO in the United States is considering increasing the granularity of scheduling periods, and Guangdong Province in my country has directly applied a higher granularity of scheduling periods. However, the unit combination proble...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/46H02J3/06
CPCH02J3/008H02J3/06H02J3/46
Inventor 杨知方张梦晗余娟林伟代伟杜尔顺
Owner CHONGQING UNIV