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Evaluation method for operating characteristics of power distribution network after grid connection of distributed power supplies

A technology of distributed power supply and operation characteristics, applied in the field of distribution network, can solve problems such as increased network loss, reduced reliability, and voltage exceeding the limit of distribution network.

Inactive Publication Date: 2015-05-06
STATE GRID CORP OF CHINA +2
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Problems solved by technology

The injected active power and reactive power change the size and direction of the power flow of the distribution network, which may cause the voltage of the distribution network to exceed the limit, increase the network loss, and reduce the reliability.

Method used

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  • Evaluation method for operating characteristics of power distribution network after grid connection of distributed power supplies
  • Evaluation method for operating characteristics of power distribution network after grid connection of distributed power supplies
  • Evaluation method for operating characteristics of power distribution network after grid connection of distributed power supplies

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Embodiment Construction

[0111] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0112] Such as figure 1 , the present invention provides a method for evaluating the operating characteristics of a distribution network after a distributed power supply is grid-connected, comprising the following steps:

[0113] Step 1: Determine and calculate the distribution network operation characteristic evaluation index, the distribution network operation characteristic evaluation index includes the first layer index, the second layer index and the third layer index;

[0114] Step 2: Use AHP to determine the evaluation weight of distribution network operation characteristics;

[0115] Step 3: Establish an evaluation matrix of the third-tier indicators relative to the first-tier indicators;

[0116] Step 4: Calculate the evaluation vector and evaluation value of the first layer index.

[0117] In the step 1, (such as figure 2 ) The first layer of i...

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Abstract

The invention provides an evaluation method for the operating characteristics of a power distribution network after the grid connection of distributed power supplies. The evaluation method includes the following steps of: determining evaluation indexes of the operating characteristics of the power distribution network, wherein evaluation indexes of the operating characteristics of the power distribution network includes a first-layer index, a second-layer index and a third-layer index; determining evaluation weight of the operating characteristics of the power distribution network; establishing an evaluation matrix of the third-layer index with respect to the first-layer index; calculating the evaluation vector and evaluation value of the first-layer index. According to the evaluation method for the operating characteristics of the power distribution network after the grid connection of the distributed power supplies, the operating characteristics of the power distribution network connected with the distributed power supplied are evaluated from three aspects, respectively being a safety index, an electric energy quality index and an economical efficiency index, based on the generation and operation characteristics of the distributed power supplies; the quantitative evaluation of the operating characteristics of the power distribution network after the grid connection of the distributed power supplies is achieved by using a fuzzy comprehensive evaluation method combined with a layer analytic method.

Description

technical field [0001] The invention belongs to the technical field of distribution network, and in particular relates to a method for evaluating the operating characteristics of a distribution network after distributed power sources are connected to the grid. Background technique [0002] With the increasing shortage of conventional energy supply and the increasing calls for environmental protection, the development of distributed energy has become one of the important measures for countries all over the world to promote energy conservation and emission reduction. As an important means to promote the adjustment of energy strategy and accept renewable energy into the grid, the access of distributed power generation to the distribution network has received extensive attention and research from all over the world, and breakthroughs have been made in some technologies. Research on distributed energy in foreign countries started earlier, and many advanced technologies for distri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q50/06
Inventor 王鹏任志勇盛万兴于辉刘海涛季宇吴鸣李洋杨亮
Owner STATE GRID CORP OF CHINA
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