Microgrid multi-objective optimization scheduling method considering electric vehicle random access

Abstract

The invention discloses a microgrid multi-objective optimization scheduling method considering electric vehicle random access. Microgrid operation cost minimization, pollutant treatment cost minimization and load variance minimization serve as three objective functions of a multi-objective scheduling model, and the randomness of accessing a microgrid by an electric vehicle is simulated through a Monte-Carlo simulation method; and when various constraint conditions are met, the model is solved by adopting a multi-objective particle swarm algorithm, and output power of each distributed power supply, total charge-discharge power of the electric vehicle and interactive power of the microgrid and a main power grid in each time period of a scheduling cycle are determined. According to the method, the randomness of accessing the microgrid by the electric vehicle is fully considered, and a battery of the electric vehicle serves as a mobile distributed energy storage apparatus to access the microgrid, so that the peak-load shifting effect is achieved, the economy and stability of microgrid operation in a time-of-use power price environment are improved, and the pollutant discharge of a microgrid system is reduced.

Description

technical field [0001] The invention relates to the field of optimal dispatching of micro-grids, in particular to a multi-objective optimal dispatching method of micro-grids considering the random access of electric vehicles. Background technique [0002] Microgrid refers to a small power generation and distribution system composed of distributed power sources, energy storage devices, energy conversion devices, loads, monitoring and protection devices, etc., which can be connected to the large power grid or run in isolation. component. Optimal dispatching of the microgrid is of great significance to promote the efficient operation of the microgrid. It refers to rationally and effectively arranging the output of each distributed power supply according to a certain control strategy under the premise of meeting the load demand of the microgrid system. And the interactive power with the distribution network to achieve different scheduling objectives. Scheduling objectives incl...

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Problems solved by technology

[0004] In the existing optimal dispatching methods considering the connection of electric vehicles to microgrids, only the single goal of minimizing operating costs is often considered, and the impact of pollutants generated by distributed power sources and main grid power generation on the environment is not considered. And the impact of charging and discharging of electric vehicles on the stability and security of the power grid, which is not conducive to the role of electric vehicles in improving the stability of the power grid, and is not conducive to the construction of an environmentally friendly society

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