Method for estimating 20-kilovolt medium-voltage distribution scheme

A scheme evaluation and scheme technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as optimization of substation capacity without consideration, and achieve the effect of simplifying statistical indicators

Inactive Publication Date: 2011-11-23
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

However, many of the current evaluation methods for 20kV medium-voltage power distribution schemes derive from the formula the benefits brought about by raising the voltage level, such as reducing line voltage drop, reducing line loss, improving power supply capacity, expanding power supply radius, etc., or for a certain In specific areas, in the case of determining the combination of substation main transformers in advance, the scale of power grid construction and investment comparison are determined by analyzing the number of substations and the number of incoming and outgoing lines under a certain load density, without considering the optimization of substation capacity

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  • Method for estimating 20-kilovolt medium-voltage distribution scheme
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  • Method for estimating 20-kilovolt medium-voltage distribution scheme

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[0056] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0057] The purpose of the present invention is to establish a comprehensive evaluation method for 20 kV medium-voltage power distribution scheme, propose AHP / DEA model, establish a comprehensive evaluation index system, provide a theoretical basis and decision-making reference for the optimization of 20 kV power distribution scheme, and then provide a reference for future Grid planning provides decision-making basis and support.

[0058] 1. DEA model with AHP constrained cone and its improved model AHP / DEA

[0059] Analytic Hierarchy Process (AHP) embodies the basic characteristics of people's decision-making thinking: decomposition, judgment, and synthesis. It integrates mathematical methods, hierarchical structures,...

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Abstract

The invention discloses a method for estimating a 20-kilovolt medium-voltage distribution scheme, which belongs to the technical field of the application of electric industry. In the method, an estimation index system of the 20-kilovolt distribution scheme is established by an analytic hierarchy process (AHP), and a data envelopment analysis (DEA) estimation model with an AHP preference cone is improved, wherein the provided AHP/DEA model is used for solving the weight of an index. By the method, the problem that 9 comparison objects cannot be exceeded in the conventional method is solved and the problem of combining subjectivity and objectivity reasonably in estimation by introducing a relaxation factor is also solved properly.

Description

technical field [0001] The invention belongs to the technical field of electric industry application, and in particular relates to a method for evaluating a 20-kilovolt medium-voltage power distribution scheme. Background technique [0002] The selection of the 20 kV medium-voltage distribution voltage level of the power system is a strategic issue for the development of the power industry and an important technical decision in the power field, which is related to the development of the power grid and even the entire society. It is affected by many factors and affects many aspects at the same time. Therefore, the determination of the power distribution scheme must be carefully planned and carefully considered. [0003] At present, there are a series of models and methods in the specific methods and steps of reasonably selecting the voltage level of the urban distribution network, as well as the evaluation and selection of the 20 kV distribution network, and it can be conclud...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 刘文霞张敏王婉罗红刘流朱翰超蒋洪源
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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