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Static equivalent assessment method for renewable energy consumption capability by considering elastic space

A technology of renewable energy and elastic space, applied in the field of value evaluation, can solve the problems of not considering the elastic space of the system and the capacity of delivery and consumption, and the space model of the feasible domain of the capacity of renewable energy.

Active Publication Date: 2019-07-09
CHONGQING UNIV
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Existing methods for assessing renewable energy consumption capacity do not take into account the system's elastic space and external consumption capacity, and do not describe the feasible domain space model of renewable energy consumption capacity

Method used

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  • Static equivalent assessment method for renewable energy consumption capability by considering elastic space
  • Static equivalent assessment method for renewable energy consumption capability by considering elastic space
  • Static equivalent assessment method for renewable energy consumption capability by considering elastic space

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] The static equivalent evaluation method of renewable energy consumption capacity considering elastic space mainly includes the following steps:

[0088] 1) Obtain power system data.

[0089] The power system data mainly includes node load data, line parameters and generator parameters.

[0090] The line parameters mainly include the unit-node connection matrix C n×u , Power transfer transfer distribution factor matrix A l×n , line transmission capacity upper limit and the lower limit of line transmission capacity T k .

[0091] The generator parameters mainly include the output upper limit of the renewable energy unit Lower limit of output of renewable energy units P RGi , Non-renewable energy unit output upper limit and non-renewable energy unit output lower limit P NRGj .

[0092] 2) Establish the equivalent evaluation model of power system elasticity space.

[0093] The main steps of establishing a power system elastic space equivalent evaluation mode...

Embodiment 2

[0147] see figure 1 , an experiment to verify the static equivalent evaluation method of renewable energy accommodation capacity considering elastic space, mainly includes the following steps:

[0148] 1) Establish an IEEE39 node test system, including 10 generators, the generators at nodes 32, 35, and 37 are renewable energy generators, and the loads at nodes 8, 23, and 29 are the power sent out by tie lines.

[0149] 2) Input node load power

[0150]

[0151] In the formula, is the node load power vector, where 39 is the number of grid nodes.

[0152] 3) Establish line transmission power equation constraints

[0153] First obtain the unit-node connection matrix C 39×10 and the power transfer transfer distribution factor matrix A 46×39 ,as follows:

[0154]

[0155] Then use the input data in (18) to establish constraints as follows:

[0156]

[0157] T 46×1 =[T 1 T 2 …T k …] T (k=1,2,...,46)(20)

[0158]

[0159] In the formula: T 46×1 is the line ...

Embodiment 3

[0210] see Figure 2 to Figure 21 , a comparative experiment of a static equivalent evaluation method for renewable energy consumption capacity considering elastic space, mainly includes the following steps:

[0211] 1) Set the comparison scheme:

[0212] M0: The elastic space of the power system is not considered;

[0213] M1: Taking into account the deep peak shaving of the power system and the elastic space for emergency capacity increase of the line.

[0214] In order to measure the accuracy of the M0 and M1 method of renewable energy unit output feasible region and the feasible region of the connection line, the projection of the feasible region space on the two-dimensional plane and the three-dimensional plane is used for visual comparison. See the attached figure for details. The result is as follows:

[0215] (I) Analysis of the Feasible Domain Results of Renewable Energy Unit Output Considering the Elastic Space of Power System

[0216] (1) Comparison of feasible ...

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Abstract

The invention discloses a static equivalent assessment method for renewable energy consumption capability by considering elastic space. The method mainly comprises the following steps: 1) obtaining electric power system data; 2) establishing an electric power system elastic space equivalent evaluation model; and 3) calculating the elastic space equivalent evaluation model of the power system by using a multi-parameter planning theory to obtain a renewable energy unit output feasible region RGT and a tie line transmission power feasible region RPT. Under the condition that system variable constraint and N-1 safety constraint are met, intra-network consumption improvement effect and intra-network consumption improvement effect of elastic space on renewable energy sources are evaluated. The improvement space of the consumption capacity of the renewable energy sources is directly evaluated.

Description

technical field [0001] The invention relates to the field of evaluating the renewable energy consumption capacity of a power system, in particular to a static equivalent evaluation method for the renewable energy consumption capacity considering elastic space. Background technique [0002] With the vigorous development of clean electric energy, in order to build a clean and low-carbon energy system and alleviate the problems of abandoned wind, solar and water, it is essentially possible to expand the feasible area of ​​power system operation. The main methods include: expanding power grid equipment (transmission lines , energy storage, etc.), multi-energy coordinated and complementary operation transmission network structure optimization, etc. The expansion of power grid equipment requires a lot of investment, and the expansion of the power grid operation mode needs to consider the coordination of the power grid company's business. However, if the "elastic space" of the fea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0639G06Q50/06Y02P90/82
Inventor 杨知方温世杨余娟代伟
Owner CHONGQING UNIV
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