Method for determining low-loss operation mode of medium voltage distribution network

Abstract

The invention discloses a method for determining the low-loss operation mode of a medium voltage distribution network. The method includes the steps of: 1, firstly establishing a medium voltage distribution network low-loss operation mode customization model which takes the minimal total electric energy loss in a customization period under a plurality of constraint conditions including the reliability constraint as a target; 2, reading basic data of the distribution network; 3, setting reliability index constraint limits; 4, optimally searching different switch vector states of the distribution network by using an evolutionary programming algorithm combined with an improved random mutation strategy; 5, outputting results. According to the method, when customizing the operation mode of the medium voltage distribution network, the minimal total electric energy loss in the customization period is taken as the target, and the power supply reliability constraint is involved, thus being beneficial to improving operation economy and reliability of the distribution network, and being capable of ensuring network structure constraint of the distribution network, namely ensuring the radiation pattern and non-island operation of the distribution network.

Description

technical field [0001] The invention relates to a medium-voltage distribution network, in particular to determining an ideal operation mode through evaluation among various operation modes of the medium-voltage distribution network, and belongs to the field of power system operation. Background technique [0002] As an important part of the power system, the distribution network undertakes the important responsibility of providing safe, reliable and high-quality electric energy to users. The quality of distribution network operation has an important impact on the safety, reliability and economy of the entire power grid. my country's medium-voltage distribution network is usually designed in closed loop and operated in open loop. There are a large number of section switches and tie switches. Under normal circumstances, it is necessary to formulate the operation mode of the distribution network according to different load conditions, so as to reduce losses and balance Load, im...

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Problems solved by technology

Among them, distribution network reconfiguration is mainly to optimize the structure of distribution network in a short period of time, and related methods are difficult to customize the future operation mode of distribution network; The comprehensive consideration of the economy and reliability of the operation; at the same time, the research on the optimization of the distribution network operation mode is mostly static, that is, the load state of a certain time section is studied, and the periodical distribution network operation mode optimization little research

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