New construction and reconstruction planning cooperative optimization method for main equipment in power distribution network

Abstract

The invention relates to a new construction and reconstruction planning cooperative optimization method for main equipment in a power distribution network. The method comprises the steps that (1) an equipment topological connection relation index and a main equipment operational state level index of the power distribution network are set, and the power distribution network is divided into a plurality of reconstruction subregions through a construction subregion partitioning algorithm based on power distribution network topological structure clustering; (2) the power supply capacity, the power supply abundant degree and other indexes of the power distribution network are evaluated for new construction and reconstruction projects in all the subregions; (3) by combining the characteristics of reconstruction of the power distribution network and the characteristics of new extension projects, on the basis of the power supply capacity evaluation index of the power distribution network, a cooperative optimization objective function and a cooperative optimization mathematic model for new construction and reconstruction of the main equipment in the power distribution network are set; (4) construction time sequences of the new construction and reconstruction projects in the reconstruction subregions are subjected to random sorting to form a plurality of construction time sequence schemes for the new construction and reconstruction projects. According to the cooperative optimization mathematic model, with respect to objective function values of different time sequence schemes, the scheme with the maximum objective function value is selected and serves as a recommended scheme for the construction time sequences of the new construction and reconstruction projects.

Description

technical field [0001] The invention relates to a distribution network planning method, in particular to a collaborative optimization method for new construction and renovation planning of main equipment in a distribution network. Background technique [0002] The distribution network is an important part of the power grid, which directly faces end users and is closely related to the production and life of the masses. At present, the transformation of major equipment such as power transformation equipment, power distribution equipment, and lines in the distribution network is still at the initial stage of estimating the amount of transformation work and annual transformation plans based on the health level of equipment, and has not yet achieved the matching with power demand and grid structure. Effective connection, there are problems such as the number of scheduled power outages and the low level of economy. Distribution network planning mainly includes the planning of new...

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Problems solved by technology

[0005] However, a single application of cluster analysis technology or collaborative optimization method cannot realize the optimal coordination arrangement for the start-up and new commissioning of distribution network projects in any region.

The main reason is that the existing cluster analysis technology does not have clustering calculation indicators for the topological connection relationship and operating status level of distribution network equipment, and it is impossible to divide the distribution network into several relatively independent transformation partitions that can transmit power to each other; at the same time , due to the large number of newly-built or renovated projects in the regional distribution network, the application of the existing collaborative optimization method for optimization requires a large amount of calculation and a large number of iterations, and it is easy to produce wrong solutions

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