Three-port single-phase single-stage converter and its operating method

A converter, single-stage technology, applied in the direction of converting irreversible DC power input to AC power output, photovoltaic power generation, etc., can solve the problems of large volume, short life, low reliability and other problems of high-capacity electrolytic capacitors, and achieve The effect of less energy conversion times, less quantity, and high conversion efficiency

Inactive Publication Date: 2015-09-02
DARFON ELECTRONICS (SUZHOU) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, high-capacity electrolytic capacitors have disadvantages such as large volume, short life and low reliability.

Method used

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  • Three-port single-phase single-stage converter and its operating method
  • Three-port single-phase single-stage converter and its operating method
  • Three-port single-phase single-stage converter and its operating method

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Embodiment Construction

[0091] In order to have a further understanding of the purpose, structure, features, and functions of the present invention, the following detailed descriptions are provided in conjunction with the embodiments.

[0092] Please refer to figure 1 as shown, figure 1 It is a schematic diagram of a three-port single-phase single-stage converter 100 according to an embodiment of the present invention. The three-port single-phase single-stage converter 100 includes an input port 102 , a modulation port 104 , a controller 106 , a phase converter 108 and an active power decoupling circuit port 110 . The input port 102 is coupled to the DC power source 112, and the input port 102 receives and transmits the input power PDC of the DC power source 112, wherein the DC power source 112 can be a solar panel, and the input port 102 has maximum power point tracking (maximum power point tracking) Features. But the present invention is not limited to the fact that the DC power source 112 can b...

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Abstract

The invention provides a three-port single-phase single-stage inverter which comprises an input port, a modulation port, a controller, a commutator and an active power decoupling circuit port. The input port receives and transmits input power of a direct-current power supply. The modulation port generates a full-wave rectified sine wave current based on the input power. The controller generates switch control signals, inverting switch control signals, first pulse width modulation control signals and second pulse width modulation control signals. The commutator converts the sine wave current into an alternating current according to the switch control signals and the inverting switch control signals, and outputs the alternating current to a load-bearing device or a city power grid. The modulation port executes corresponding actions according to the first pulse width modulation control signals, and the active power decoupling circuit port executes corresponding actions according to the second pulse width modulation control signals.

Description

technical field [0001] The invention relates to a three-port single-phase single-stage converter and an operation method thereof. Background technique [0002] Generally speaking, the input port of the inverter must have a maximum power point tracking (MPPT) function to draw the maximum power point (MPP) of the solar panel. After the input port of the inverter absorbs the energy of the solar panel, the modulation port of the inverter will output a full-wave rectified sine wave current. Then, the low-frequency switching commutator converts the full-wave rectified sinusoidal current into AC current and transmits it to the mains. In the prior art, the inverter uses high-capacity electrolytic capacitors to adjust the DC input power of the solar panel and the AC output power of the inverter. That is, when the input power of the solar panel is greater than the output power of the inverter, the high-capacity electrolytic capacitor absorbs the difference between the input power of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/48
CPCY02E10/50
Inventor 陈耀铭廖建尧林文勋周政彦相理古孝治
Owner DARFON ELECTRONICS (SUZHOU) CO LTD
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