Model predictive control method for electric vehicle charging and voltage regulation

A technology of model predictive control and electric vehicles, applied in electric vehicles, electrical components, vehicle energy storage, etc., can solve the problems of lack of guiding significance and waste of resources in practical applications

Active Publication Date: 2018-12-07
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0004] In the current research on the combination of model predictive control and electric vehicles, most of the considerations are charging and energy management of electric vehicles, internal temperature management of batteries, etc. Voltage service, relying only on the role of traditional reactive power compensation devices, resulting in unnecessary waste of resources
Therefore, the current research lacks effective guidance for practical application

Method used

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  • Model predictive control method for electric vehicle charging and voltage regulation
  • Model predictive control method for electric vehicle charging and voltage regulation
  • Model predictive control method for electric vehicle charging and voltage regulation

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Embodiment

[0058] figure 1 It is a specific implementation flow chart of the model predictive control method for charging and participating in voltage regulation of electric vehicles in the present invention. Such as figure 1 As shown, the specific steps of the model predictive control method for electric vehicle charging and participating in voltage regulation of the present invention include:

[0059] S101: Design a linear state-space model of the grid system:

[0060] First, the electric vehicle charging linear model can be defined as follows:

[0061] e(k+1)=e(k)+T f c(k)

[0062] Among them, k represents the operating time of the grid system, e(k) and e(k+1) represent the electric vehicle battery SOC (State of Charge, remaining capacity, unit KWh) at time k and time k+1, c(k) Indicates the charging power provided for electric vehicles at time k, T f Indicates the sampling time, that is, the interval between two data samples.

[0063] The constraints of the EV charging linear ...

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Abstract

The invention discloses a model predictive control method for electric vehicle charging and voltage regulation. The method includes the following steps: establishing a linear state space model of an electric vehicle charging and voltage regulation power grid system, obtaining an optimal reference curve of a prediction stage through calculation on the basis of a preset voltage target value, establishing an optimization problem model in a first stage by taking changes of a deviation between the minimized power grid voltage and a rated value and the control quantity as a target function, obtaining an optimal reachable curve that enables the target function of the optimization problem model to be minimized according to the optimal reference curve, establishing a predictive controller model ofa second stage by taking deviations among the minimized power grid voltage, the control quantity and the given reference value as a target function, obtaining control output on the basis of the optimal reachable reference curve, converting the control output into a control increment of the power grid system, inputting the control increment into the state space model of the power grid system, and conducting parameter control over the power grid system. The method of the invention can simultaneously meet the power demand of an electric vehicle and achieve the goal of maintaining the voltage stability of the power grid.

Description

technical field [0001] The invention belongs to the technical field of electric vehicle charging and control, and more specifically relates to a model predictive control method for electric vehicle charging and participating in voltage regulation. Background technique [0002] With the increasingly prominent contradictions between economic development, environmental pollution and energy crisis, it is urgent to reduce energy consumption and dependence on oil resources. The development of electric vehicles with obvious advantages in environmental protection, cleanliness and energy saving is an important measure to alleviate these contradictions. Electric vehicles have gradually captured more and more automotive market share. Although the development of electric vehicles can play a role in alleviating the energy crisis and environmental pollution, a large number of electric vehicles connected to the grid for charging will inevitably have an impact on the operation, planning an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00B60L11/18
CPCH02J3/00H02J2203/20Y02E40/30Y02T10/70
Inventor 李立英李瑶邹见效徐红兵
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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