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A transmission network planning method considering the correlation characteristics of wind farm output power

A technology of output power and wind farms, which is applied in the field of transmission network planning considering the correlation characteristics of output power of multiple wind farms, and can solve problems such as unconsidered impacts

Active Publication Date: 2019-12-17
NANTONG ZHONGNENG MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Unfortunately, the above literatures only considered the impact of a single wind farm connected to the grid on the transmission network planning, but did not consider the impact of multiple wind farms connected to the grid at the same time

Method used

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  • A transmission network planning method considering the correlation characteristics of wind farm output power
  • A transmission network planning method considering the correlation characteristics of wind farm output power
  • A transmission network planning method considering the correlation characteristics of wind farm output power

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Embodiment 1

[0048] In order to expand the planning of the transmission network after multiple wind powers are connected at the same time, so as to save the cost of power grid expansion as much as possible on the basis of safe and reliable transmission of electric energy, the invention discloses a transmission network planning considering the correlation characteristics of wind farm output power model, and its approximate solution method based on the step-by-step regression method, the overall process is as attached figure 1 shown.

[0049] The planning target is the grid construction cost V con Minimal, as follows:

[0050]

[0051] In the formula, X i It is a binary variable representing whether the line i to be selected is selected or not, taking "1" means that the line i is selected in the planning scheme, and taking "0" means that the line is not selected; m can is the number of lines to be selected; C i is the construction cost of the line i to be selected; Ω can is the set o...

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Abstract

The present invention discloses a power network planning method taking the consideration of wind power plant output power correlative characteristics. On the basis of historical output data of wind electric plants, an non-parametric estimation method is employed to determine edge distribution characteristics of random output of each wind electric plant. A maximum likelihood method is employed to calculate parameters in each common Copula function, and appropriate Copula functions are selected from the common Copula functions to perform quantification of correlative characteristics among the random output of the wind electric plants according to a rule of the minimum squared Euclidean distance in squared Euclidean distances between each common Copula function and experience Copula distribution. The method provided by the invention is simple and efficient.

Description

technical field [0001] The invention relates to a transmission network planning technology under the background of a high proportion of wind power access, in particular to a transmission network planning method considering the correlation characteristics of the output power of multiple wind farms. Background technique [0002] The main task of transmission network planning is to optimize the grid structure in the target year on the basis of power system load forecasting and power supply planning, and to save the cost of power grid expansion as much as possible on the basis of safe and reliable power transmission, which is an important part of power system planning. part. In recent years, with the continuous increase of the proportion of wind power access in the power grid, wind power with high uncertainty has become a factor that cannot be ignored in transmission network planning. [0003] At this stage, engineers and technicians have conducted in-depth research on the tran...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00H02J3/38
CPCH02J3/00H02J3/386H02J2203/20Y02E10/76
Inventor 郭晓丽周辉张新松杨奕王亚芳孙敏胡屹立
Owner NANTONG ZHONGNENG MACHINERY
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