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Model predictive control method for electric vehicle charging and participating in voltage regulation

A model predictive control, electric vehicle technology, applied in electric vehicles, battery/fuel cell control devices, current collectors, etc., can solve problems such as lack of guidance in practical applications, waste of resources, etc., to reduce power grid operation and maintenance costs, electricity consumption The effect of maintaining demand and achieving control objectives

Active Publication Date: 2021-05-14
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 participating in voltage regulation
  • Model predictive control method for electric vehicle charging and participating in voltage regulation
  • Model predictive control method for electric vehicle charging and participating in voltage regulation

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Embodiment

[0057] 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:

[0058] S101: Design a linear state-space model of the grid system:

[0059] First, the electric vehicle charging linear model can be defined as follows:

[0060] e(k+1)=e(k)+T f c(k)

[0061] 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.

[0062] The constraints of the EV charging linear ...

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Abstract

The invention discloses a model predictive control method for charging electric vehicles and participating in voltage regulation. Firstly, a linear state space model of the power grid system for charging electric vehicles and participating in voltage regulation is established, and then calculated according to the preset voltage target value to obtain the prediction stage. The optimal reference curve, and then take the minimization of the deviation between the grid system voltage and the rated value and the change of the control quantity as the objective function, establish the optimization problem model of the first stage, and obtain the minimum objective function of the optimization problem model according to the optimal reference curve The optimal attainable curve can be optimized; finally, the target function is to minimize the deviation between the grid voltage, the control quantity and the given reference value, and the second-stage predictive controller model is established, and the control output is obtained according to the best attainable reference curve, and the conversion is the control increment of the power grid system, which is input to the state space model of the power grid system to control the parameters of the power grid system. The invention can simultaneously meet the electricity demand of the electric vehicle and the goal of maintaining the voltage stability of the 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 Patents(China)
IPC IPC(8): H02J3/32H02J3/18B60L55/00B60L58/12
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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