Power electronic converter robustness switching control method

A technology of converter robustness and control method, which is applied in the direction of adjusting electric variables, control/regulation system, DC power input conversion to DC power output, etc. It can solve the problems of not truly reflecting the working state of the system, poor control performance, robustness, etc. To reduce the dynamic response time, enhance the robustness, and speed up the response speed

Active Publication Date: 2018-10-16
XIAN UNIV OF TECH
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  • Abstract
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Problems solved by technology

[0004] The purpose of the present invention is to provide a robust switching control method for power electronic converters, which solves the problem that the existing technology cannot truly reflect the working state of the actual system, and the control performance becomes poor or even unstable when the signal changes in a large range, and the robustness is poor The problem

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  • Power electronic converter robustness switching control method
  • Power electronic converter robustness switching control method
  • Power electronic converter robustness switching control method

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Embodiment

[0089] Such as figure 1 As shown, in order to verify the control effect of the present invention in the actual circuit, according to figure 1 The Boost design assembles the hardware circuit, and uses the MC9S12DG128MPVE microcontroller as the core controller.

[0090] figure 2 It is a block diagram of the control system of the method of the present invention, and the control loop includes two parts: an inductive current adaptive regulator and a switching controller. The output voltage and expected voltage of the system are used as the input of the inductor current adaptive regulator, and the inductor current is adaptively adjusted according to the error between the current output voltage and the expected voltage, and the inductor current value obtained through adaptive adjustment is used as the switching control The reference current input of the device. At the same time, the measured value of the inductor current, the measured value of the output voltage and the expected ...

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Abstract

The invention discloses a power electronic converter robustness switching control method. The method comprises the steps of 1, building a system model, wherein in order to enable a system to change areference point into an original point during control, a PWA model type of a Boost converter is changed into an error model type of the Boost converter; 2, obtaining a controller parameter, and obtaining a matrix in a robustness switching controller; 3, according to a switching law, controlling a circuit of the Boost converter, that is, when an output voltage is larger than a desired voltage, adaptively reducing the reference value of an inductive current, when the output voltage is smaller than the desired voltage, adaptively increasing the reference value of the inductive current, outputtinga high level through a switching controller to switch on a switch S, and otherwise, outputting a low level through the switching controller to switch off the switch S. By means of the control method,the dynamic response time of the system is shortened, and the robustness of the converter to the input voltage and load sudden change is enhanced during running.

Description

technical field [0001] The invention belongs to the technical field of electric energy conversion, and relates to a robust switching control method for a power electronic converter. Background technique [0002] Electric energy is the most important form of energy in modern society, and the power electronic converter realizes the conversion of electric energy and is the key device for the effective utilization of electric energy. A power electronic converter is a typical hybrid system with both discrete events of switching devices being turned on and off, and state variables that change continuously when the switch is in a specific state. A hybrid system is a unified dynamic system formed by the interaction of a continuous variable system and a discrete event dynamic system. It is possible for the circuit to be linear in each switching state, but the switching of the switch makes the whole system nonlinear. [0003] Traditional power electronic converter control mostly ado...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/155
CPCH02M3/155
Inventor 任海鹏王轩李洁
Owner XIAN UNIV OF TECH
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