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Judgment method for voltage level of high power accessing power grid

A technology of voltage level and access to the power grid, applied in the direction of electrical digital data processing, instruments, calculations, etc., can solve the problems of unable to provide technical indicators, excessive subjective dependence, etc., and achieve the effect of stabilizing evaluation results and eliminating differences

Inactive Publication Date: 2014-06-18
STATE GRID CORP OF CHINA +2
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

The existing method for determining the voltage level of large power sources connected to the grid cannot provide reliable technical indicators, mainly relying on expert experience, and the subjective dependence is too large

Method used

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  • Judgment method for voltage level of high power accessing power grid
  • Judgment method for voltage level of high power accessing power grid
  • Judgment method for voltage level of high power accessing power grid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0070] For a 600MW unit in a certain area, according to the established index evaluation system, the AHP-anti-entropy weight evaluation model is used for comprehensive evaluation of the unit connected to the 220kV power grid (method 1) and connected to the 500kV power grid (mode 2).

[0071] Table 1 Calculation of various indicators of 600MW power supply connected to the grid voltage level in a certain area

[0072]

[0073] Finally, the overall weight values ​​of ways 1 and 2 are 0.1270 and 0.1858 respectively. Through the above evaluation of the AHP-anti-entropy weight method, it can be seen that there are advantages in the operation of the units in this area connected to the 500kV power grid.

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Abstract

The invention discloses a judgment method for the voltage level of a high power accessing power grid. The judgment method comprises the steps of constructing a target hierarchical structure; constructing a judgment matrix and a calculation target weight by an expert experience method; then calculating respective anti-entropy weight values of ten indexes under three target layers by an anti-entropy method, and obtaining a total weight by a hierarchical recursion method to obtain a reliable voltage level judgment result. Due to the combination of subjective and objective weighting methods, the stability and the objectiveness of a voltage level evaluation result are guaranteed when high power is accessed into a power grid.

Description

technical field [0001] The invention relates to a method for judging the voltage level of a large power supply connected to a grid. Background technique [0002] Under the background of energy strategies such as "West-to-East Power Transmission, UHV AC-DC Mixed Transmission", the interconnection of power grids in large regions, and the pattern of long-distance and large-scale power transmission has become an inevitable situation. The grid structure is becoming increasingly complex and the level of short-circuit current is increasing, making it more difficult to choose a large power access system solution. Therefore, it is necessary to reasonably determine the voltage level of the large power supply connected to the grid under the premise of considering the safety, stability and economy of the grid operation. [0003] The current power plant access system scheme is mainly based on the principles of "simplified power plant wiring, decentralized external power supply, and hier...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 牛新生刘晓明吴健李琨张同军曹喆张恒旭李勃
Owner STATE GRID CORP OF CHINA
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