Current reference value automatic adjustment switchover control method of power electronic converter

A current reference and power electronics technology, applied in the direction of converting DC power input to DC power output, adjusting electrical variables, control/regulation systems, etc., can solve problems such as high cost and complex system structure

Active Publication Date: 2014-07-30
西安梅隆控制工程有限责任公司
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  • Abstract
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Problems solved by technology

[0004] The purpose of the present invention is to provide a switching control method for automatic adjustment of the current reference value of the power electronic converter, which so

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  • Current reference value automatic adjustment switchover control method of power electronic converter
  • Current reference value automatic adjustment switchover control method of power electronic converter
  • Current reference value automatic adjustment switchover control method of power electronic converter

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Embodiment Construction

[0033] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0034] like figure 1 As shown, the controlled object of the method of the present invention selects a Boost converter circuit, which includes an input power supply E, an inductance L, a diode D, a switch S, a capacitor C and a load R, and the input power supply E, an inductance L and a switch S constitute In a series circuit, a series branch composed of a diode D and a capacitor C is connected in parallel at both ends of the switch S, and the capacitor C is connected in parallel alone with a load R; in addition, the inductance L and the inductance equivalent resistance r L In series, diode D and diode equivalent resistance r d In series, switch S and switch equivalent resistance r s In series, capacitance C and capacitance equivalent resistance r c in series.

[0035] refer to figure 2 , the method of the present invention, in figure 1...

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Abstract

The invention discloses a current reference value automatic adjustment switchover control method of a power electronic converter. The current reference value automatic adjustment switchover control method of the power electronic converter comprises the steps that 1 a switchover system model of the power electronic converter is built according to the work state of the converter; 2 a Lyapunov function of a switchover subsystem i is defined, a related matrix is calculated, and a Lyapunov function value of the subsystem i is obtained; 3 a switchover control rule is selected, and the subsystem with the maximum Lyapunov function is selected as the current subsystem; a current reference value is adjusted according to an output error, when a parameter is uncertain or input voltage and a load change, the current reference value is adjusted according to the rule, and the control method is achieved. The current reference value automatic adjustment switchover control method of the power electronic converter is simple in control process, is good in effect, guarantees overall control stability of the converter, has robustness on changes of the input voltage, the load and the like, and improves the response speed of output voltage.

Description

technical field [0001] The invention belongs to the technical field of electric energy conversion control, and relates to a switching control method for automatic adjustment of a current reference value of a power electronic converter. Background technique [0002] The power electronic converter is the key device to realize the conversion and effective utilization of electric energy. The power electronic converter forms a unified dynamic system by the interaction of the continuous variable system and the discrete event dynamic system. The circuit may be linear in each switching state, but Switching the switch state according to a certain rule makes the whole system become a discontinuous nonlinear system. [0003] The analysis and design of traditional power electronic converters use the small signal linearization method to obtain a linear model that ignores the switch state. Although this model can easily use the traditional frequency domain design method, the problem is th...

Claims

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Application Information

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IPC IPC(8): H02M3/156
Inventor 任海鹏訾亚春
Owner 西安梅隆控制工程有限责任公司
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