Power distribution network multi-objective optimization method oriented to openable capacity improvement

Abstract

The invention discloses a power distribution network multi-objective optimization method oriented to openable capacity improvement. The method comprises the following steps: S1, collecting basic data required by power distribution network multi-objective optimization; S2, constructing a multi-objective function with the openable capacity, the network loss, the operation cost and the transformation cost of the power distribution network as optimization objectives; and S3, taking transformer replacement, line transformation, distributed resource locating and sizing, network radiation operation, power balance, node voltage, branch loss and branch capacity as constraints, and utilizing a hierarchical optimization method to solve the multi-objective function to obtain an optimal solution of the multi-objective function. According to the invention, various resources and behaviors involved in the transformation process of the power distribution system are reasonably modeled, so that the comprehensive optimality of the transformation scheme is effectively improved, and the method has certain application value for improving the power supply capacity of the system, reducing the operation and transformation cost and delaying the construction investment.

Description

technical field [0001] The invention relates to the technical field of power grids, in particular to a multi-objective optimization method for a distribution network oriented to increase openable capacity. Background technique [0002] The power distribution system is an important link connecting the power grid and users. It plays an irreplaceable role in meeting the electricity demand of residents and ensuring the normal production of enterprises. In recent years, with the rapid development of the economy, the demand for electric energy of various users has continued to rise, resulting in a sharp shortage of the openable capacity of the existing power distribution system, which seriously restricts the further development of the economy and society. In order to improve the load capacity of the system and meet the electricity demand of the society, it is imminent to upgrade the distribution network on the original basis. At present, most of the methods related to the upgradi...

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Problems solved by technology

At present, most of the methods related to the upgrading and transformation of distribution networks adopt the simple capacity-load ratio method. This method combines the subjective experience of the designer and determines the upgrading and transformation plan through simple capacity setting calculations. It is difficult to guarantee the optimality of the scheme, resulting in waste of resources or substandard renovation

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