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Electric network energy quality synthetic appraisement method based on analytic hierarchy process and fuzzy algorithm

An analytical hierarchy process, power quality technology, applied in the field of comprehensive evaluation of power grid, comprehensive evaluation of power quality of power grid, reasonable, regional power quality status, can solve the problem of lack of full utilization, insufficient, no power quality general measurement and monitoring data integration in one. Platform and other issues, to achieve the effect of strong practicability and reasonable design

Inactive Publication Date: 2008-08-20
JIANGSU ELECTRIC POWER RES INST
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Problems solved by technology

However, there is still a lack of unified management, comprehensive query, and full utilization of these data. The province's power quality equipment, pollution sources, power quality general survey and monitoring data have not been integrated on one platform.
[0005] In addition, in the evaluation of power quality, the current means only refer to the five international standards of national power quality, which is relatively simple. There is no systematic power quality evaluation index system, and it is impossible to obtain reasonable power quality conditions for complex power grids and users. Evaluate
There is not enough research on the power quality assessment of a certain area and a certain line, and it cannot adapt to the current and future power quality requirements of the power grid.

Method used

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  • Electric network energy quality synthetic appraisement method based on analytic hierarchy process and fuzzy algorithm
  • Electric network energy quality synthetic appraisement method based on analytic hierarchy process and fuzzy algorithm
  • Electric network energy quality synthetic appraisement method based on analytic hierarchy process and fuzzy algorithm

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Embodiment Construction

[0021] As shown in Figures 1-3, the principle of the present invention is specifically described as follows:

[0022] (1) The first part of the technical plan: determination of evaluation indicators

[0023] To make a comprehensive evaluation of power quality, the premise is to determine the evaluation index of power quality. According to the existing 6 national power quality standards and combined with the data measured on site, the following evaluation indicators are determined: voltage deviation, voltage fluctuation, voltage flicker including long-term flicker, short-term flicker, frequency deviation, three-phase voltage fluctuation Balance, harmonics (including total harmonic distortion, odd harmonics, even harmonics), harmonic currents, voltage transients. See Table 1 and Figure 1.

[0024] Table 1 Indicators of the second-level items to be scored

[0025] Evaluation index

Level 1 indicators

Secondary indicators

x 1

x ...

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Abstract

A method combining analytic hierarchy process and fuzzy algorithm is provided to evaluate grid electricity quality, including establishing a power quality comprehensive evaluation index system, realizing a comprehensive evaluation of the grid electricity quality status and grid electricity quality in different areas and so on. The invention overcomes the limitation of traditional single-index and single-point power quality evaluation, forming a comprehensive and practical power quality evaluation index system with technical and data support provided for the safe and stable operation of electricity grid.

Description

technical field [0001] The invention relates to a method for comprehensive evaluation of electric power quality of a power grid, which is used for rationally and comprehensively evaluating the power quality status of a power grid and a region. It belongs to the technical field of power system automation. Background technique [0002] With the development of my country's industrial and agricultural production, the application of nonlinear loads in modern industry has increased significantly. Such as large rectifier equipment, frequency conversion speed control device, electrified railway locomotive, electric arc furnace, etc., these typical nonlinear loads will absorb or inject harmonic current from the grid, thereby causing grid voltage distortion. In addition, due to the increase of other non-linear and impact loads, as well as the voltage asymmetry, dynamic voltage drop, fluctuations, etc. caused by faults inside and outside the power grid, together with harmonics, the po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/00G06Q50/00G06Q50/06
Inventor 王红星王念春李群顾文袁晓冬
Owner JIANGSU ELECTRIC POWER RES INST
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