Optimization Method of Fast Charging Buses Charging Strategy for Complex Operating Environment

Abstract

The electric bus has gradually become the main tool of public transport in the city. It has become an indispensable link in the electric bus for fast electric energy supply. The ordered charge control strategy proposed in this paper solves the problem of electric bus charging optimization. This strategy enables security and economy to be better guaranteed in the operation of the power system. The orderly control strategy adopts the method of hierarchical control, including the prediction layer, scheduling layer and control layer. In this paper, an optimization model for the rapid charging of electric buses based on the cost of charging and battery loss is first set up. Considering charging power constraint and restraint and power supply limit of departure, according to the data of forecasted layer's expected full load rate, traffic index and timesharing price, the rolling layer is optimized continuously in the dispatching layer, and finally the reliable charging plan is arranged by the dispatching layer. In order to verify the effectiveness of hierarchical charge control strategy, a fast charging station is optimized for charging. The numerical analysis shows that the proposed method has the function of clipping peaks and filling valleys and improves the rapid charging of electric buses of the economy, weakened a large number of electric vehicles focused on the impact of grid power.