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Method for controlling power equipartition of input-series output-series high-frequency link inverters

A series output and inverter technology is applied in the output power conversion device, the conversion of DC power input to DC power output, and the conversion of AC power input to DC power output, etc., which can solve the problems of complicated control methods and increased cost. Achieve the effect of low sensor requirements, reduced use costs, and simple and reliable control methods

Inactive Publication Date: 2014-04-16
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0004] (1) The control method of the system adopts the three-loop control method, and the control method is relatively complicated;
[0005] (2) The system requires a large number of voltage and current sensors. When the number of modules increases, the cost increases accordingly; if the input or output voltage is too high, the requirements for voltage sampling sensors also increase

Method used

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  • Method for controlling power equipartition of input-series output-series high-frequency link inverters

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Embodiment Construction

[0020] The realization device of the control method is composed of a controller, a main circuit and a sampling circuit. exist figure 1 Among them, the controller takes the PWM generation circuit and the drive circuit as the core; the main circuit is mainly composed of high-voltage input, high-frequency isolated DC-AC inverter, filter inductor, capacitor and load; the sampling The circuit is composed of a Hall-type voltage sensor and a conditioning circuit.

[0021] In order to achieve the purpose of power sharing of each module, the output voltage cross-feedback control method is adopted. exist figure 2 , for the output voltage given as v ref In the n-module inverter system, the voltage loop of each module is given as The total output voltage of the system is v o , the output voltage of each module is v o1 , v o2 ,...,v on . For module 1, the sum of the output voltage samples of other modules is As the feedback quantity of module 1, it is given by the voltage loop...

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Abstract

The invention provides a method for controlling power equipartition of input-series output-series high-frequency link inverters, belongs to high-frequency inverter class in the field of power electronics, and is suitable high-pressure input and output occasions. In the invention, a control method of output voltage cross feedback is adopted according to inverter modules which constitute an input-series output-series system; a controller of the each inverter module uses an isochronous control mode, such as resonant control, so that the output voltages of the inverter modules are equal; and thus, the power equipartition of the inverter modules is achieved. The output voltage V0 of the whole system is equal to the sum of the output voltages of the modules, which is in accordance with the requirements of inverter design. The control method of the whole inverter system is reasonably designed, achieves the power equipartition of the inverter modules in the simple control mode, and has high stability, high reliability and good application prospect.

Description

technical field [0001] The invention provides a power equalization control method for an input series output series high-frequency chain inverter, which belongs to the direction of combined high-frequency inverters in the field of power electronics. Background technique [0002] For inverters used in high-voltage input and high-voltage output occasions, the high voltage problem of power devices is still a challenge we face, because the power devices that can withstand such a high voltage are very limited and the cost is very high. Therefore, through It is very necessary to choose the correct topology to reduce the voltage experienced by power devices. In the case where the input and output are both high voltage, connecting the input terminals of n inverter modules in series and the output terminals in series (Input-Series Output-Series, ISOS) can effectively reduce the voltage borne by the power devices, and then you can choose the withstand voltage Lower, higher switching ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/42H02M7/5387H02M3/335
Inventor 沙德尚邓凯郭志强廖晓钟
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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