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A Distributed Charging and Discharging Strategy for Electric Vehicles Considering Three-phase Load Balance

An electric vehicle and load balancing technology, applied in AC network load balancing, circuit devices, AC network circuits, etc., can solve problems such as complex optimization problems and inability to obtain global optimal solutions, so as to ensure safe and stable economic operation and avoid optimization The effect of long time and smooth load

Active Publication Date: 2018-12-11
NORTHEAST DIANLI UNIVERSITY
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AI Technical Summary

Problems solved by technology

When the number of electric vehicles increases, the increase of optimization variables and constraints will make the optimization problem more complex, and even the global optimal solution cannot be obtained

Method used

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  • A Distributed Charging and Discharging Strategy for Electric Vehicles Considering Three-phase Load Balance
  • A Distributed Charging and Discharging Strategy for Electric Vehicles Considering Three-phase Load Balance
  • A Distributed Charging and Discharging Strategy for Electric Vehicles Considering Three-phase Load Balance

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Embodiment Construction

[0059] The present invention will be further described below using the accompanying drawings and actual calculation examples.

[0060] (1) Establish an optimization model for distributed charging and discharging of electric vehicles:

[0061] The optimization model aimed at load valley filling is:

[0062]

[0063] In the formula: U(.) is a convex function; P ch (i,t) is the charging power of electric vehicle i in the tth time period; P dch (i,t) is the discharge power of electric vehicle i in the t-th period; D(t) is the regular load of the power distribution system in the t-th period.

[0064] refer to figure 1 , a distributed charging and discharging optimization strategy is proposed. Distributed charge and discharge control is different from centralized management. In the optimization process, users optimize their own charge and discharge process according to a certain control signal, so as to obtain the optimal charge and discharge power curve.

[0065] Distribute...

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PUM

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Abstract

The invention discloses an electric car distributed charge-discharge scheduling policy based on three-phase load balance. The scheduling policy is characterized in that the policy is used for eliminating adverse impacts brought by disordered charge of an electric car, and the problems of large calculation amount and strict communication bandwidth requirement of centralized management can be effectively relieved. According to the policy, an electric car charge-discharge optimization model is established, valley filling at night and V2G service provision at a load peak are realized, and then smooth system loading is performed; based on this, three-phase load balance constraint is considered to ensure safe and stable operation of a system; and finally, the control policy proposed in the invention is verified through an IEEE33 node power distribution network test system, the result indicates that distributed management can achieve a centralized control effect, peak clipping and valley filing are realized, and three-phase load imbalance is reduced.

Description

technical field [0001] The invention relates to the technical field of electric power demand response in a power system, and relates to a research on a distributed charging and discharging strategy for electric vehicles considering three-phase load balance. Background technique [0002] In recent years, the number of traditional fuel private cars has been increasing, which not only intensifies the speed of fossil fuel consumption, but also causes serious environmental pollution due to a large number of vehicle exhaust emissions. Facing the dual pressure of energy crisis and environmental degradation, governments around the world have introduced relevant policies to promote the development of new energy vehicles. In China, in order to provide important policy support for the development of new energy vehicles, the General Office of the State Council proposed to vigorously promote the construction of electric vehicle charging infrastructure, so as to effectively solve the prob...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/32
CPCH02J3/32H02J2203/20
Inventor 于娜李国庆黄大为于飞
Owner NORTHEAST DIANLI UNIVERSITY
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