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Photovoltaic power generation device and method based on amplitude-phase control

A photovoltaic power generation, amplitude and phase control technology, applied in the field of power electronics, to achieve the effect of reducing waveform distortion, good static and dynamic characteristics, and reducing voltage distortion rate

Inactive Publication Date: 2012-06-06
NORTHEASTERN UNIV LIAONING
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Problems solved by technology

[0005] At present, the domestic self-developed grid-connected inverter has the weakness of unstable system operation and low reliability; and the protection measures are not complete, which is easy to cause accidents and is integrated with the building Issues such as culturalization have not been well considered

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Embodiment Construction

[0040] The present invention will be described in further detail in conjunction with the accompanying drawings.

[0041] figure 1 It is a structural block diagram of the device of the present invention.

[0042] A photovoltaic power generation inverter device based on amplitude and phase control, such as figure 1 shown. Including: main circuit unit, main control unit, voltage and current sensor, programmable controller, power parameter measurement unit, wherein, the main circuit unit includes 4 groups of IGBT modules, IGBT absorbing protection capacitors and drive and power amplification unit; main control unit, Including digital signal processor (DSP), field programmable gate array (FPGA) and peripheral circuits; power parameter measurement unit is composed of power parameter table;

[0043] The input end of the main circuit unit is connected to the output end of the DC side voltage sensor, the output end of the main circuit unit is connected to the input end of the AC s...

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Abstract

The invention relates to photovoltaic power generation device and method based on amplitude-phase control, belonging to the technical field of power electronics. An AC side voltage and current sensor detects three-phase AC voltage and current, and the three-phase AC voltage and current are processed by a voltage and current translation circuit and then transmitted to a DSP of a main control unit for processing; the DSP determines the output vector of voltage regulation through the amplitude-phase control and inner loop control according to set values of the detected AC side current and voltage and DC side voltage and transmits the output vector to an FPGA; output voltage received by the FPGA and a waveform generated by a triangle generator are synthesized into a PWM waveform to be transmitted to a driving and amplifying unit; and a switching device of a main circuit unit generates switch-on and switch-off according to an amplified pulse signal. The photovoltaic power generation methodsuccessfully reduces the AC side voltage distortion rate, is suitable for multiple load types, reduces the influence of load current change on output AC voltage and enhances the fast response capacity.

Description

technical field [0001] The invention belongs to the technical field of power electronics, and in particular relates to an inverter device and method for controlling three-phase voltage output based on amplitude and phase angle. Background technique [0002] As a new green energy, solar energy is being rapidly popularized and applied due to its advantages of cleanness, flexibility, and inexhaustibility. Energy supply, but towards the direction of gradually replacing conventional energy. In foreign countries, grid-connected power generation has gradually become the main application field of solar photovoltaic power generation, and the solar photovoltaic industry has gradually formed and continues to develop at a high speed. [0003] At present, foreign grid-connected inverter technology is developing very rapidly. The research mainly focuses on space vector PWM technology, digital phase-locked control technology, digital DSP control technology, maximum power point tracking ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02M7/537
CPCY02E10/563Y02E10/56
Inventor 闫士杰王旭杜蘅付皓
Owner NORTHEASTERN UNIV LIAONING
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