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Electric automobile charging and discharging control method based on active disturbance rejection controller

An active disturbance rejection controller, charge and discharge control technology, applied in the direction of electric vehicle charging technology, electric vehicles, general control systems, etc., can solve the problems of only discharging the resistance, unable to feed back the electric energy to the grid, energy waste, etc.

Inactive Publication Date: 2017-10-20
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Claims
  • Application Information

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Problems solved by technology

The system consists of an isolated DC / DC converter and a step-down chopper. The disadvantage is that when the battery is discharged, it can only discharge the resistor, and the electric energy cannot be fed back to the grid, which will cause a lot of waste of energy.

Method used

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  • Electric automobile charging and discharging control method based on active disturbance rejection controller
  • Electric automobile charging and discharging control method based on active disturbance rejection controller
  • Electric automobile charging and discharging control method based on active disturbance rejection controller

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Embodiment

[0024] figure 1 It is a schematic diagram of the basic structure of a V2G bidirectional charging and discharging device. Its main circuit is mainly composed of four parts: three-phase AC power supply, converter module, soft start circuit and battery pack. The converter module adopts a voltage-type PWM rectifier composed of IGBT modules, and the output adopts capacitor filtering.

[0025] The PWM rectifier works in the rectification state when charging, and in the inverter state when discharging, and the electric energy of the battery is fed back to the grid. The control loop includes a voltage and current sampling circuit, a synchronous signal processing unit, and a microcomputer control unit. The voltage and current sampling circuit completes the acquisition and processing of voltage and current analog signals, and transmits the processed signals to the microcomputer control unit; After receiving the information, in the case of no fault in the self-inspection system, it st...

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Abstract

The invention relates to an electric automobile charging and discharging control method based on an active disturbance rejection controller and belongs to the Vehicle to Grid (V2G) technology and power electronic technology field. The method comprises steps that step A, an electric vehicle charging and discharging model is constructed; step B, the active disturbance rejection controller is summarized; step C, an AC / DC and DC / DC mathematics model in a bidirectional charging and discharging system is established, and the active disturbance rejection controller is established according to the two-stage system model of the charging and discharging system; and step D, simulation analysis is carried out. The method is advantaged in that 1, a problem of relatively large overshooting of a common PID control system can be solved, and influence of parameter time varying on system decoupling performance and contradiction between rapidity and stationarity existing in a control system are effectively solved; and 2, the active disturbance rejection controller is not dependent on a specific mathematics model of a controlled system and further has relatively strong anti-interference capability for internal and external interference, the active disturbance rejection controller is proved to have relatively good robustness for uncertainty of the model and measurement noise according to the simulation result, and relatively good dynamic performance is realized.

Description

technical field [0001] The invention relates to a modeling method for PWM charging and discharging circuits based on Active Disturbance Rejection Control (ADRC), which belongs to the technical field of power electronics technology and vehicle-to-electricity interconnection (V2G), in particular to an ADRC controller A new control method for the charging and discharging system of electric vehicles has been realized. Background technique [0002] With the improvement of people's living standards and the society's requirements for energy conservation and environmental protection, electric vehicles, as an energy-saving, efficient, and pollution-free modern transportation tool, have been used more and more in daily life, and will gradually become an important part of urban transportation. tool dominance. Among them, the charger plays a key role in the application of electric vehicles. With the sharp increase in the level of grid intelligence and the number of electric vehicles, ...

Claims

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Application Information

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IPC IPC(8): G05B17/02B60L11/18
CPCB60L53/60G05B17/02Y02T10/70Y02T10/7072Y02T90/12
Inventor 周雪松邹磊马幼捷高志强
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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