Dynamic economical dispatch method for microgrid system on the basis of improved particle swarm optimization

Abstract

The invention relates to a dynamic economical dispatch method for a microgrid system on the basis of an improved particle swarm optimization. The dynamic economical dispatch method for the microgrid system on the basis of the improved particle swarm optimization comprises the following steps: setting a particle swarm optimization; generating an initial particle swarm; setting the upper and lower limit constraint of the speed of particles; determining the adaptive values of the particles; comparing the adaptive values of the particles, finding the local optimal value and the position of each particle, and also finding a particle which achieves a global optimal value and the position of the particle; updating the position and the speed of each particle; judging whether the position and the speed of each particle are out of limit; determining the transmitting power of PCC (point of common coupling) serving as a swing bus; carrying out acceleration processing to the speed of the particles by an adaptive algorithm; and if the speed of the particles achieves iterations, stopping iteration, and obtaining a final result. According to the dynamic economic dispatch method for the microgrid system on the basis of the improved particle swarm optimization, the speed of the particles is regulated, a targeted search can be carried out when a search becomes a local search; meanwhile, the PCC used for connecting a microgrid with a major network is used as the swing bus; and the PCC is used for balancing when on-line load and the power output of a distributed power supply are not matched.

Description

technical field

[0001] The invention relates to an economic scheduling method for optimal operation of a micro-grid system, in particular to a dynamic economic scheduling method for a micro-grid system based on an improved particle swarm algorithm. Background technique

[0002] The operation of the unit requires cost, and the operation of the microgrid system should consider the operation economy. Different units have different cost functions, and the economic costs of different output schemes are also different. The purpose of economic dispatch is to optimize the output of each unit within a certain period to obtain the optimal output level and minimize the cost. The output of the unit in the front and rear periods also involves the constraints of the unit’s climbing ability, which is closely related to the output of the unit in the front and rear periods, so it is necessary to dispatch the dynamic economy of the microgrid system. At the same time, due to the limited capac...

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