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Large power grid construction economic evaluation method

An evaluation method and technology for large power grids, applied in the direction of instruments, data processing applications, information technology support systems, etc., can solve the problems of inability to comprehensively and reasonably evaluate the actual functions of UHV grids and adaptability, and achieve simple and intuitive evaluation results. Effects with good evaluation effects and simple mathematical models

Inactive Publication Date: 2014-12-17
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the construction of the backbone network structure is related to the economy and rationality of the power grid structure and scale in the next few decades. The economic evaluation of power grid construction is still limited to the investment in the power grid according to the 20-year period, and the UHV grid structure cannot be comprehensively and reasonably evaluated. The actual function of the system can no longer meet the needs of future social development

Method used

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  • Large power grid construction economic evaluation method
  • Large power grid construction economic evaluation method
  • Large power grid construction economic evaluation method

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Experimental program
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Effect test

Embodiment 1

[0028] According to my country's actual distribution of power generation resources, social and economic development, environmental protection and energy conservation and emission reduction needs, an evaluation index system for large power grid interconnection benefits, social benefits and long-term benefits has been established.

[0029] See attached figure 1 , discloses a schematic diagram of a large power grid construction economic evaluation index system according to the present invention, which constitutes an index evaluation system in a large power grid construction economic evaluation method. The evaluation indicators include: first-level indicators include networking benefits u 1 , social benefits u 2 , long-term benefit u 3 ;Secondary indicators include peak staggering benefit u 11 , mutual benefit u 12 , standby benefit u 13 , power supply benefit u 21 , Industry benefit u 22 , environmental benefitsu 23 , operating benefit u 31 , output value benefit u 32 ,...

Embodiment 2

[0085] In this embodiment, according to the evaluation index system of large power grid construction economy in Embodiment 1, in view of the fact that the fuzzy comprehensive evaluation method can objectively reflect the fuzzy affiliation relationship between the evaluation exercises and the evaluation conclusions, the fuzzy comprehensive evaluation method is used to carry out the economic evaluation of large power grid construction. Benefit Evaluation. The evaluation steps of the fuzzy comprehensive evaluation method are as follows:

[0086] (1) Establish an evaluation system, and calculate the index value according to the evaluation system.

[0087] The evaluation system includes two layers: the first-level indicators include networking benefits u 1 , social benefits u 2 , long-term benefit u 3 ;Secondary indicators include peak staggering benefit u 11 , mutual benefit u 12 , standby benefit u 13 , power supply benefit u 21 , Industry benefit u 22 , environmental ben...

Embodiment 3

[0101] In this embodiment, the economic evaluation of large power grids based on IEEE-14 nodes is listed.

[0102] See Table 1 for the basic data of IEEE-14 nodes. The total load is 259MW, the reference power is 100MVA, and the maximum load utilization hours Tmax=4500h.

[0103]

[0104] Table 1: Basic data of IEEE-14 power saving system

[0105] against figure 1 The indicators listed in are calculated using the basic data of the IEEE-14 power-saving system, and the calculation results of each indicator and the degree of membership of the indicators are shown in Table 2.

[0106]

[0107] Table 2: IEEE-14 node calculation example index value and membership degree

[0108] The index fuzzy evaluation matrix can be obtained from Table 2

[0109] R 1 = 0.200 0.467 0.200 0.133 ...

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Abstract

The invention provides a large power grid construction economic evaluation method, which comprises the following steps that: a two-stage evaluation system is built; proper evaluation indexes are selected; the evaluation is represented by comments in different degrees by fuzzy languages in fuzzy comprehensive evaluation; then, factors which are not easy to quantify are quantified by the fuzzy relationship synthesis principle; and an evaluated object is comprehensively evaluated from a plurality of factors. Particularly, evaluation indexes are firstly determined; then, the membership degree and the weight of the indexes are calculated; a fuzzy evaluation matrix and a weight vector are subjected to synthesis calculation; and finally, a fuzzy comprehensive evaluation result is obtained. The evaluation result which is not easy to quantify is quantified, and the evaluation result is simple and visual. The method provided by the invention has the advantages that a mathematic model is simple; the calculation is simple and convenient; the evaluation effect on multi-factor and multilayer complicated problems is better; and the method is applicable to the large power grid construction economic evaluation study.

Description

technical field [0001] The invention relates to an evaluation method, in particular to a large power grid construction economic evaluation method in the field of power system planning evaluation. Background technique [0002] The economic evaluation of power grid construction is an important consideration index for power grid planning and construction. In the prior art, the existing economic evaluation of power grid construction is mostly limited to the economic evaluation of the investment in the power grid itself. The evaluation content includes three aspects: financial evaluation, technical and economic evaluation, and national economic evaluation. Financial evaluation is mainly to analyze the economic benefits of power grid investment input and output, and generally uses indicators such as internal rate of return, net present value, and investment recovery period to evaluate; technical and economic evaluation is mainly to analyze the technical Evaluation of indicators ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q50/06
CPCY02E40/70Y04S10/50
Inventor 刘开俊韩丰刘自发李晖王智冬刘连光郭会萌赵万里彭冬
Owner STATE GRID CORP OF CHINA
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