Electric car peak load shaving capacity estimation method based on energy balance

Abstract

The invention discloses an electric car peak load shaving capacity estimation method based on energy balance. The method considers the influence of a time-of-use electricity price on EV vehicle ownercharge, the vehicle owner takes the minimum of the charge-discharge algebra cost as a target for charge-discharge strategy optimization, an EV charge-discharge scheduling scheme of a distribution system takes stabilization of a load curve as a target to employ a dynamic plan method to perform EV charge-discharge power dispatching to achieve load peak load shaving. The method can be used for assessment of the EV peak load shaving capacity in the distribution system. The EV charge energy is estimated by employing the EV travel distances; in the electricity market environment of the time-sharingelectricity price, the electric car owner takes the minimum of the charge-discharge algebra cost as a target to determine the duration of charge and discharge in each electricity price stages; and theelectric car peak load shaving capacity estimation method can dispatch the electric car charge-discharge power to have a peak load shaving effect.

Description

technical field [0001] The invention relates to the field of designing power system operation, and relates to a method for estimating peak-shaving and valley-filling capabilities of electric vehicles based on energy balance. technical background [0002] In order to solve the shortage of fossil fuels and environmental problems, the important role of electric vehicles is gradually highlighted. A report from the United States (EPRI) [1] It is predicted that by 2050 plug-in electric vehicles will occupy 20%, 62%, and 80% of the market share under three different penetration rates of low, medium, and high respectively. In 2016, the annual sales volume of my country's new energy vehicles reached 507,000, and the stock has exceeded 1 million, ranking first in the world. A high proportion of electric vehicles will inevitably cause a huge increase in electric load. There are many related studies on the impact of electric vehicle charging and discharging on the load of the power s...

AI Technical Summary

Problems solved by technology

There are many related studies on the impact of electric vehicle charging and discharging on the load of the power system. [2-5] , Literature [6] calculates the equivalent charging load based on the fuel sales volume of the gas station, and uses the refueling volume of the existing gas station to convert the charging volume of electric vehicles, but the premise is that all traditional vehicles are replaced by EVs.

Literature [7] used the iterative water injection method to optimize the charging and discharging power of EVs. The simulation time period was from 20:00 at that time to 8:00 the next day, that is, at night, and there was no 24-hour load curve in a day. The number of EVs with 5 or 10 The simulation cannot reflect the impact of EV on the actual load under high penetration rate, and the related impact of power grid and electricity price is not considered

Images