Quantitative calculation method for electric energy quality influence weight

A technology of power quality and calculation method, which is applied in the direction of calculation, data processing applications, instruments, etc., can solve problems such as complex judgment methods of nonlinear equipment, and achieve simple, practical, universal and universal effects

Active Publication Date: 2019-07-12
JIANGSU FRONTIER ELECTRIC TECH +3
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Problems solved by technology

[0005] In order to solve the above problems, the present invention is a quantitative calculation method of power quality influence weight, which realizes the weight calculation of different power quality indicators, and is used to correct various objective functions in plann

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  • Quantitative calculation method for electric energy quality influence weight
  • Quantitative calculation method for electric energy quality influence weight
  • Quantitative calculation method for electric energy quality influence weight

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Embodiment 1

[0036] A quantitative calculation method for power quality impact weights, comprising the following steps:

[0037] 1) Calculate the normalization coefficient λ of the impact weight of various power quality indicators based on the disturbance power of various power quality indicators;

[0038] 2) Calculate the influence weight ratio of various power quality indicators according to the normalization coefficient λ of the influence weight of various power quality indicators;

[0039] 3) Optimizing the power quality constraint objective function based on the influence weight ratio of different types of power quality indicators.

Embodiment 2

[0041] On the basis of embodiment 1, the calculation formula of the normalization coefficient λ of various power quality index influence weights in described step 1) is as follows:

[0042]

[0043] Wherein, the limit value is the corresponding limit value in the national limit value standard of the power quality index.

[0044] As a preferred embodiment, the power quality index includes: voltage deviation, voltage fluctuation, three-phase unbalance degree and harmonic, and the normalization coefficients of the corresponding power quality index influence weights are expressed as λ ΔV , lambda δV , lambda ε and lambda THD , that is, λ ΔV Indicates that the voltage deviation affects the weight normalization coefficient, λ δV Indicates the normalization coefficient of the voltage fluctuation influence weight, λ ε Indicates the normalization coefficient of the influence weight of the three-phase unbalance degree, λ THD Indicates the normalization coefficient of the influe...

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Abstract

The invention discloses a quantitative calculation method for electric energy quality influence weights. The method comprises: firstly, calculating normalization coefficients of the electric energy quality index influence weights based on disturbance power of various electric energy quality indexes; calculating an influence weight ratio of each type of power quality index according to the normalization coefficient of the influence weight of each type of power quality index; and optimizing the electric energy quality constraint objective function based on the influence weight proportion of different types of electric energy quality indexes. The quantitative calculation method for an electric energy quality influence weight realizes weight calculation of different electric energy quality indexes, and various objective functions based on electric energy quality constraint planning are corrected, main indexes influenced by electric energy quality are caught, and the technical problem thata nonlinear device (load/power supply) access power grid judgment method is complex due to the different electric energy quality indexes is solved.

Description

technical field [0001] The invention belongs to the technical field of electric energy quality evaluation, and in particular relates to a quantitative calculation method for electric energy quality impact weights. Background technique [0002] At present, with the advancement of technology and the adjustment of the national energy industry policy, the traditional distribution network and power grid have undergone major changes. The distribution network and power grid have developed from the original "passive" to " Active", its basic feature lies in the extensive access and consumption of distributed new energy. The widespread consumption of distributed new energy has not only brought intelligence to the power grid and user convenience, but also brought about common power quality problems, including voltage deviation, voltage fluctuation, harmonics and imbalance, etc., resulting in power supply electromagnetic The environment is more complex, and problems such as power grid ...

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/06395G06Q50/06
Inventor 王红星王成亮刘军成李军官国飞王俊陆玉军
Owner JIANGSU FRONTIER ELECTRIC TECH
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