A multi-objective energy optimization method for microgrid considering three-phase power flow

Abstract

The invention discloses a micro-grid multi-objective energy optimization method taking three-phase currents into consideration. The method includes the steps that a network reconstruction method is established so as to solve the problem of network losses of a micro-grid, and the network reconstruction method has good adaptability to the micro-grid. In addition, according to the situation that multiple asymmetric distributed power supplies are connected to the micro-grid and a large number of three-phase imbalance loads exist in the micro-grid and based on three-phase current calculation of the micro-grid and the network reconstruction method, a micro-grid unified coordinated optimization strategy taking active optimization of a whole system and the network losses into consideration is provided, total energy cost, the network losses and voltage deviation serve as multiple optimization objectives, and multi-objective energy optimization is converted into single-objective optimization through a subordinate function. Optimal energy distribution of the whole micro-grid is obtained through a particle swarm algorithm, energy optimization of the micro-grid is achieved, and good economic benefits are brought to power consumers.

Description

Technical field [0001] The invention belongs to the technical field of microgrid energy management, and more specifically relates to a microgrid multi-objective energy optimization method considering three-phase power flow. Background technique [0002] Microgrid is a micro-distribution system with self-control, protection and management capabilities. Making full use of distributed power is its biggest advantage. It can not only improve power quality, but also increase power supply reliability. For a long time, the energy optimization of the microgrid has generally focused on the power supply side, and the influence of network reconfiguration on the energy optimization of the microgrid has not been paid enough attention. Under this development background, scholars have just proposed the concept of dynamic microgrid, that is, the network reconfiguration of microgrid will automatically adjust with the change of distributed power output and the difference of load demand at different...

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Problems solved by technology

[0005] Aiming at the defects of the prior art, the purpose of the present invention is to provide a multi-objective energy optimization method for micro-grid considering three-phase power flow, aiming to solve the existing problem of only focusing on the distributed power supply side but not on the power supply side and network reconfiguration coordination Interactive Microgrid Energy Optimization Problem

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