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A Design Method of Power Snubber Based on Model Predictive Control

A technology of model predictive control and design method, which is applied in the direction of simulators, general control systems, control/regulation systems, etc., can solve problems such as high model accuracy requirements, and achieve power quality requirements, high flexibility, and fast response Effect

Active Publication Date: 2022-03-18
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the algorithm has high requirements for the accuracy of the model, especially the demand for load needs to be accurately observed

Method used

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  • A Design Method of Power Snubber Based on Model Predictive Control
  • A Design Method of Power Snubber Based on Model Predictive Control
  • A Design Method of Power Snubber Based on Model Predictive Control

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Embodiment Construction

[0031]This embodiment is a method for designing a power buffer based on model predictive control.

[0032] The technical features involved in this embodiment described below may be combined as long as they do not constitute a conflict with each other.

[0033] See attached figure 1 , the topology of the power buffer converter refers to the attached figure 1 . where v sa , v sb , v sc Represents a three-phase power supply; R s is the equivalent line resistance of the AC side; L s is the AC side inductance; the switching tube Q 1 ~Q 6 A three-phase rectifier bridge is formed; C dc is the DC side capacitance; the switching tube T 1 , T 2 and inductance L b A DC / DC converter is formed; the energy storage element is a battery or a super capacitor; the latter stage is a constant power load and a motor load.

[0034] This embodiment is verified by MATLAB / Simulink simulation. The specific implementation steps are as follows:

[0035] Step 1. Build a simulation model in ...

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Abstract

The invention discloses a power buffer design method based on model predictive control, which utilizes the multi-objective optimization characteristics of model predictive control to simultaneously control a three-phase rectifier bridge and a DC / DC converter. The finite set method is used to design the objective optimization function, and the overall control model is established by combining the constraints of different energy flow couplings. The model predictive control method can be used to achieve multi-objective optimal control. For the power supply system with energy storage devices, active energy management is adopted. In this way, the optimal energy distribution of multi-electric aircraft can be realized. In this way, the DC bus voltage is stabilized. According to the energy feedback of the motor, the model performs buck-boost control on the bidirectional DC-DC converter, and realizes the stability of the DC bus power by charging and discharging the battery pack. The power topology of the power buffer converter is adopted; the weight of the aircraft can be effectively reduced through the compensation and absorption of the DC bus power by the battery.

Description

technical field [0001] The invention relates to a power buffer converter voltage stabilization and energy storage control method with an energy feedback motor and a constant power load in a multi-electric aircraft electrical system. Background technique [0002] In recent years, with the introduction of multi-electric and all-electric aircraft, distributed power distribution technology has been widely used in independent power systems such as multi-electric and all-electric aircraft in the future. According to some data, the constant power load can account for 80% of the total load in the high-voltage DC power distribution system of multi-electric and all-electric aircraft in the future. The proportion of constant power loads in the system is increasing, and the problems it brings are becoming more and more prominent. [0003] For a constant power load, although its instantaneous impedance is positive But its corresponding impedance increment is negative This characteri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B17/02H02J7/34
Inventor 雷涛陈光巳刘晓飞张晓斌
Owner NORTHWESTERN POLYTECHNICAL UNIV
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