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Comparison and selection method for power transmission and distribution equipment detection center access schemes and system thereof

A technology for power transmission and distribution equipment and access schemes, which is applied in the field of comparison and selection of access schemes for power transmission and distribution equipment testing centers, and can solve the problems of low reliability and stability of the power grid, failure to consider power quality of the power grid and surrounding sensitive users Influence, no consideration of special electricity properties and other issues, to achieve the effect of improving reliability and stability

Pending Publication Date: 2020-04-14
RES INST OF ECONOMICS & TECH STATE GRID SHANDONG ELECTRIC POWER +3
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems existing in the prior art, the present invention innovatively proposes a method and system for comparing and selecting access schemes of the testing center of power transmission and distribution equipment, effectively solving Since the comparison and selection of the power transmission and distribution equipment testing center access system scheme did not consider its special power consumption properties, nor did it consider the impact on the power quality of the power grid and the surrounding sensitive users, resulting in low reliability and stability of the power grid problem, effectively improve the reliability and stability of the power grid

Method used

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  • Comparison and selection method for power transmission and distribution equipment detection center access schemes and system thereof
  • Comparison and selection method for power transmission and distribution equipment detection center access schemes and system thereof
  • Comparison and selection method for power transmission and distribution equipment detection center access schemes and system thereof

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Embodiment 1

[0042] Such as figure 2 As shown, the present invention provides a comparison and selection method for the access scheme of the power transmission and distribution equipment detection center, which considers the economic factors and technical factors of the access scheme respectively, so as to determine the best access scheme, and also includes:

[0043] S1, add the user short-circuit test impact factor to the technical factors, calculate and analyze the impact of the user short-circuit test impact on the grid voltage sag, the impact of the user short-circuit test impact on the voltage imbalance, and the impact of the user short-circuit test impact on voltage harmonics;

[0044]S2. Evaluate the impact of user short-circuit test on the access scheme of the transmission and distribution equipment testing center.

[0045] Among them, the user short-circuit test includes three stages, before the user short-circuit test, during the user short-circuit test, and after the user short...

Embodiment 2

[0048] Such as Figure 4 As shown, in the technical solution of the present invention, step S1 in the comparison and selection method of the access scheme of the power transmission and distribution equipment detection center specifically includes:

[0049] S11, respectively determine the short-circuit test capacity, test type, and power grid operation mode to be calculated;

[0050] S12, according to the short-circuit test capacity to be calculated, test type, and power grid operation mode, respectively calculate the voltage sag caused by the user's short-circuit test in different scenarios, record the minimum voltage of the busbar of the surrounding plants, and conduct a voltage sag sensitivity analysis;

[0051] S13, according to the short-circuit test capacity to be calculated, test type, and power grid operation mode, respectively calculate the voltage imbalance caused by the user's short-circuit test in different scenarios, record the maximum negative sequence voltage of ...

Embodiment 3

[0063] Such as Figure 8 As shown, in the technical solution of the present invention, step S2 in the comparison and selection method of the access scheme of the power transmission and distribution equipment detection center specifically includes:

[0064] S21, calculating the scores of voltage sag, voltage unbalance and voltage harmonic under a certain short-circuit test capacity and grid operation mode respectively;

[0065] S22. Calculate the short-circuit test score for a certain short-circuit test capacity and grid operation mode according to the scores of voltage sag, voltage unbalance and voltage harmonic under a certain short-circuit test capacity and grid operation mode;

[0066] S23. Selecting the lowest score of the short-circuit test under different short-circuit test capacities and operating modes as the short-circuit test score of the access system scheme.

[0067] Among them, the specific formula for the voltage sag score is:

[0068] C drop Indicates the s...

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Abstract

The invention provides a comparison and selection method for power transmission and distribution equipment detection center access schemes. According to the invention, economic factors and technical factors of an access scheme are respectively considered, so that an optimal access scheme is determined; the method further comprises the following steps: adding a user short-circuit test impact factorin the technical factors, and respectively calculating and analyzing the influence of the user short-circuit test impact on the power grid voltage sag, the influence of the user short-circuit test impact on the voltage unbalance and the influence of the user short-circuit test impact on the voltage harmonic wave; and evaluating the influence of the user short-circuit test on the access scheme ofa power transmission and distribution equipment detection center. The invention further provides a comparison and selection system for the access scheme of the power transmission and distribution equipment detection center, the problem of low reliability and stability of the power grid caused by the fact that the special power utilization property of the power transmission and distribution equipment detection center are not considered and the influence on the power quality of the power grid and surrounding sensitive users is not considered when the power transmission and distribution equipmentdetection center is compared and selected to be accessed to the system scheme is effectively solved, and the reliability and stability of the power grid are effectively improved.

Description

technical field [0001] The invention relates to the field of comparison and selection of access schemes, in particular to a method and system for comparison and selection of access schemes of a power transmission and distribution equipment testing center. Background technique [0002] The power system is the organic unity of power generation, transmission, and power consumption. The stable operation of the power system depends on the stability of the power generation equipment, power transmission equipment and power consumption equipment that make up the system and the dynamic balance among them. The access of large-scale power users or special power users will profoundly change the power balance and system dynamic characteristics of the local power grid. Therefore, it is necessary to conduct in-depth research on the access system schemes of these power users. [0003] A complete set of mature workflow has been formed for the comparison and selection of existing conventional...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J3/01H02J3/26H02J3/06G01R31/52G01R31/62G01R31/00G01R31/08G01R31/12G01R31/327
CPCH02J3/00H02J3/01H02J3/26H02J3/06G01R31/003G01R31/086G01R31/1227G01R31/327Y02E40/40Y02E40/50
Inventor 张栋梁薄其滨张丽娜魏佳杨斌张家宁王逸群袁振华孙毅刘晓明曹相阳孙东磊张玉跃高效海付一木刘冬牟颖杨思王男魏鑫
Owner RES INST OF ECONOMICS & TECH STATE GRID SHANDONG ELECTRIC POWER
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