DC-DC converter control method and system

A DC-DC, control method technology, used in control/regulation systems, conversion of DC power input to DC power output, instruments, etc.

Active Publication Date: 2015-06-24
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the algorithm itself requires a large number of online rolling optimization calculations, which limits the application of the algorithm to fast controlled objects. The point-to-point one-step prediction of the predictive function control algorithm can quickly converge to the set point, so that fast processes and objects can be controlled.

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  • DC-DC converter control method and system

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Embodiment Construction

[0072] The present invention will be further described below in conjunction with specific examples.

[0073] Such as figure 1 Shown is the topological circuit diagram of the Buck DC-DC converter. The topology of the Buck converter is a combination of a voltage source, a series switch and a current load. It is also called a series switch converter. where V in and V out Respectively, the input voltage and output voltage, L is the inductance, R is the load resistance, C is the capacitance, r L is the internal impedance of the output inductor, r c is the equivalent series impedance of the output capacitor. r d and r ds are the parasitic loss impedances of the freewheeling diode and the field effect transistor respectively, Q is the main switching tube, and the main switching tube Q is provided with an input terminal of a control signal.

[0074] The basic working principle of the Buck DC-DC converter topology circuit is: the main switching tube Q is controlled by the modula...

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Abstract

The invention discloses a DC-DC converter control method and system. A set value is fast reached through a single-step forecasting method by adopting forecasting function control to achieve the control of a DC-DC converter. The invention further provides a DC-DC converter control system. According to the DC-DC converter control method, large numbers of on-line rolling optimizing calculations needed by a model forecasting control algorithm itself are effectively reduced through the single-step forecasting method, and the set value is fast reached to achieve the control of the DC-DC converter.

Description

technical field [0001] The invention relates to the field of predictive control in DC-DC circuits and advanced control methods in power electronics, in particular to a DC-DC converter control method and system. Background technique [0002] The generation of fuel cell electric energy depends on the continuous supply of fuel. Fuel supply fluctuations often lead to unstable or even large-scale fluctuations in the output voltage of fuel cells. In addition, various workloads in real life have different rated operating voltages. , how to match the output voltage of the fuel cell with it is a problem. So it is very important to design a safe, reliable and efficient DC-DC converter. It boosts the voltage of the fuel cell to the DC bus voltage, and then steps down the voltage of each step-down circuit to supply power to the load. When the battery input voltage fluctuates, it can still ensure the stability of the DC bus voltage. [0003] Model predictive control algorithm has the a...

Claims

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Application Information

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IPC IPC(8): H02M3/156
Inventor 谢磊刘振
Owner ZHEJIANG UNIV
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