Orderly charging and discharging control method for electric automobile considering operation constraints of transmission network

Abstract

The invention discloses an orderly charging and discharging control method for an electric automobile considering the operation constraints of a transmission network. Coordinated control of a power grid and the electric automobile is realized through the two-level scheduling mechanism of a transmission network power scheduling control center and a distribution network scheduling control station under the consideration of N-1 power flow constraint of a transmission network, the power constraint of a charging and discharging facility, the charge state constraint of the electric automobile, the user charging and discharging demand and the scheduling willingness based on wireless communication, a GPS (Global Positioning System), a GIS (Geographic Information System) and electric automobile V2G. Compared with an existing orderly charging and discharging control method for the electric automobile, the method has the advantages that the peak-shaving effect and scheduling flexibility of charging and discharging for large-scale electric automobiles can be brought into better play; the interaction between the electric automobile and the power grid is expanded to the level of the transmissionnetwork; the charging and discharging behaviors of the electric automobile respond to the operation state of transmission network; and the N-1 static security of the power grid can be further enhanced.

Description

technical field [0001] The invention belongs to the technical field of power system control operation, and in particular relates to a control method for orderly charging and discharging of electric vehicles taking into account the operation constraints of a transmission network. Background technique [0002] In recent years, my country's new energy vehicle industry represented by electric vehicles has developed rapidly. The national "Energy Conservation and New Energy Automobile Industry Development Plan (2012-2020)" set the goal of accumulative production and sales of pure electric vehicles and plug-in hybrid electric vehicles nationwide by 2020 exceeding 5 million units, and the state requires cities to add or renew The proportion of new energy vehicles in the public service field is not less than 30%. At the same time, the scale of charging and discharging facilities is also growing rapidly. It is estimated that by 2020, 20,000 charging and discharging stations and 5.07 ...

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Problems solved by technology

[0004] The existing control methods for the orderly charging and discharging of electric vehicles mainly focus on the electric energy interaction between electric vehicles and the distribution network. It is impossible to make the charging and discharging behavior of electric vehicles respond to the operation of the transmission network in an orderly manner, and it is also impossible to play the role of energy storage of large-scale electric vehicle power batteries at the transmission network level

Moreover, the existing methods usually only consider the boundary constraints such as the performance of the electric vehicle power battery and the user's charging and discharging needs, and ignore the constraints such as the power constraints of the charging and discharging facilities and the willingness of the electric vehicle user to be dispatched. The consideration of the limiting factors of the control method still needs to be considered. Complete

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