Power electronic converter robustness switching control method

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...

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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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