Transmission capacity and wind and fire bundling transmission optimization method of extra-high voltage channel

A technology of wind and fire bundling and conveying capacity, which is applied in data processing applications, forecasting, instruments, etc., and can solve problems such as no related reports on UHV transmission channels.

Inactive Publication Date: 2015-07-01
STATE GRID CORP OF CHINA +4
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

At present, there are no relevant reports on the research on the system decision-making theory of UHV transmission channels

Method used

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  • Transmission capacity and wind and fire bundling transmission optimization method of extra-high voltage channel
  • Transmission capacity and wind and fire bundling transmission optimization method of extra-high voltage channel
  • Transmission capacity and wind and fire bundling transmission optimization method of extra-high voltage channel

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Embodiment

[0066] This patent establishes an index system that considers the power demand of the receiving end grid, static safety index, transient stability index, economic index and transmission price.

[0067] 1.1 Line overload static safety index

[0068] As an important static safety analysis index, the line overload index reflects the overload degree of the line after a fault such as branch circuit breaking. After the large-scale wind-fire bundled electricity is connected to the receiving power grid from a certain drop point, the "N-1" fault of the line may cause the power of some lines to exceed its thermal stability limit, and there is a static safety risk. The selection of transmission capacity should minimize the static safety risk and meet the "N-1" safety and stability criterion. In order to quantify the line overload and overload degree into a comparable index, the present invention defines the line l under the "N-1" fault situation r The overload index I LL (lr) as formu...

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Abstract

The invention relates to a transmission capacity and wind and fire bundling transmission optimization method, and in particular relates to the transmission capacity and wind and fire bundling transmission optimization method. The invention firstly establishes an index system considering receiving end power grid electricity power demand, static security index, transient stability index, economic index and power transmission electrovalence. The indexes are quantized for establishing mathematical model of multi-objective functions and the multi-objective optimization algorithm is adopted for computing. During the solving process, multi-objective functions are solved simultaneously and computed for obtaining alternative solution meeting constraint condition, and the entropy function method is adopted for confirming the optimal compromise solution. The index system considering receiving end power grid electricity power demand, static security index, transient stability index, economic index and power transmission electrovalence is adopted, the evaluation index is convenient to compute and analyze in a quantitative manner, the transmission capacity of the electric transmission line and the influence to the receiving end power grid from sending end wind and fire bundling ratio can be reflected synthetically.

Description

technical field [0001] The invention relates to a transmission capacity and a wind-fire bundling power transmission optimization method, in particular to a transmission capacity and a wind-fire bundling power transmission optimization method. Background technique [0002] In order to solve the problem of uneven energy distribution in my country, a large-scale "West to East Power Transmission" and "North to South Power Transmission" power flow pattern. Large-capacity and long-distance power transmission needs to be transmitted to the east and central load centers through special UHV channels. Construction of long-distance UHV AC channels. [0003] The purpose of constructing UHV power transmission system is to realize the long-distance and effective transmission of large amounts of power, strengthen the interconnection of power grids, improve system stability and reduce short-circuit current. In the initial stage of the formation and construction of UHV transmission lines, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06Q50/06
Inventor 金维刚李勇崔雪刘会金
Owner STATE GRID CORP OF CHINA
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