Multi-target hierarchical economic dispatching method for micro-grid containing electric vehicles

Abstract

The invention relates to the field of micro-grids, in particular to a multi-target hierarchical economic dispatching method for a micro-grid containing an electric vehicle, which comprises the steps of upper-layer source grid-level dispatching of the micro-grid and lower-layer load-level dispatching of the micro-grid. An optimization target is established for the micro-grid in a hierarchical manner based on the operation characteristics of each dispatching participating unit of the micro-grid to carry out coordination control. Micro-grid economic dispatching is divided into upper-layer source network-level dispatching and lower-layer load-level dispatching, the upper-layer source network-level dispatching obtains an optimal energy storage plan according to real-time power and capacity limitation of a distributed renewable energy unit, an energy storage system and a conventional load in the micro-grid, and lower-layer load-level optimization operation considers electric vehicle access. And according to the unbalanced power in the micro-grid after the upper-layer source network level optimization, the charging electricity price of the electric vehicle is formulated, and an ordered charging strategy of the electric vehicle is solved. According to the method, the consumption level of renewable energy sources in the microgrid can be improved, and a basis is provided for unification of economy and safety of the microgrid, an electric vehicle group and a power system main network.

Description

technical field [0001] The invention relates to the field of micro-grids, in particular to a multi-objective hierarchical economic scheduling method for micro-grids containing electric vehicles. Background technique [0002] With the continuous development of renewable energy such as wind power and photovoltaics and the large-scale promotion of electric vehicles, the fluctuation of renewable energy output and the disorderly charging of a large number of electric vehicles will bring significant challenges to the safe and stable operation of the power grid. It is an important form of access to various distributed power sources and electric vehicles with the potential for adjustable mobile loads. In the application scenario of microgrids, it is of great significance to consider the economic dispatch strategy of connecting electric vehicles to accommodate renewable energy. [0003] There are many methods for microgrid economic scheduling, such as single-objective economic schedu...

AI Technical Summary

Problems solved by technology

[0005] With the advancement of electricity marketization, the functional stratification trend of micro-grid dispatching centers and electric vehicle charging service providers in energy dispatching is becoming more and more obvious. The current micro-grid economic dispatch method including electric vehicles does not fully pay attention to the demand and load of the source grid side. Due to the differences in the demand for electric vehicles on the side, more energy is concentrated on the scheduling method with the microgrid as a whole as the dispatching level, and the separation of core functions of the dispatching center is not obvious

Images