Visual multi-point-of-contact power distribution network fault section association method

Abstract

The invention provides a visual multi-point-of-contact power distribution network fault section association method. The method includes single line diagram generating flow which includes performing modeling of power grid data, and drawing a CAD single line diagram; fault section division flow which includes adding user information according to the CAD single line diagram, dividing the CAD single line diagram into a protection isolation section, a smallest fault search section, a preliminary fault search section, a smallest fault partition section and a smallest fault isolation section, and dividing, displaying and outputting operation of fault processing flow in a mode of using different colors; fault section association flow in which association of a fault section is performed on a division result of the protection isolation section, preliminary fault search section and smallest fault partition section with an iterative method; and power supply reliability analysis flow in which faulttime is obtained according to a fault section association partition result, and power distribution network reliability analysis of multiple points of contact is performed. The visual multi-point-of-contact power distribution network fault section association method provided by the invention can rapidly perform association, make statistics of the power failure user number and power failure line length of different stages during feeder fault accident handling, and make a power supply reliability analysis.

Description

technical field [0001] The invention relates to the field of power grid power supply, in particular to the technical fields of computer graphics and electric power engineering, and in particular to a visualized multi-contact point distribution network fault section association method. Background technique [0002] Building a smart grid is an important development goal of the State Grid during the "13th Five-Year Plan" period, and the construction and transformation of distribution network automation is an important basis for the realization of a smart grid. In order to adapt to the economic and social development situation, on the basis of considering the existing grid foundation and utilizing existing equipment resources, to meet the higher requirements of users for power supply reliability, and to learn from the technology and management level of advanced power supply enterprises at home and abroad, to accelerate the construction of modern Distribution network, to improve ...

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Problems solved by technology

[0004] (1) It cannot be applied to situations where new technologies such as distribution network automation transformation, renewable energy grid integration, distributed power generation technology, DC transmission, flexible AC transmission technology, etc. may affect the reliability of the power system; for power grid lines The topological structure is only suitable for reliability assessment of simple radial feeder systems, and is not suitable for analysis of mesh topological structures; new power market policies such as changes in the competition management system, separation of power plants and power grids, and separation of power transmission and distribution may affect power. impact on system reliability assessments, studies must be adjusted accordingly

[0005] (2) The minimum path method based on DFS is based on the idea of ​​fault enumeration, so it is only suitable for reliability evaluation of simple radial feeder systems, so more new algorithms need to be studied

The time-series Monte Carlo method has a contradiction between calculation accuracy and calculation speed. In order to obtain higher-precision calculation results, a large number of sampling calculations are often required, which greatly limits the calculation speed of the evaluation system;

[0006] (3) The single-line diagram model of the distribution network is separated from the data, the model itself lacks element information, and the data needs to be re-imported when performing power supply reliability analysis. It is difficult for engineering designers to find large errors caused by abnormalities, and it is easy to cause large errors

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