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Device for satisfying power supply by photovoltaic frequency converter with weak power

A technology of frequency converter and power storage device, which is applied in the electronic field and can solve the problems of short power supply time, unfavorable and wasteful power supply of photovoltaic frequency converters

Active Publication Date: 2013-03-06
EOPLLY NEW ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the entire period of weak sunlight irradiation, the electric energy generated by the photovoltaic cells has not been utilized, but wasted in vain.
In a year, such weak light radiation occupies a large proportion in a day, which makes the daily power supply time of photovoltaic inverters shorter, which is unfavorable for drinking water and agricultural water in areas without electricity

Method used

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  • Device for satisfying power supply by photovoltaic frequency converter with weak power
  • Device for satisfying power supply by photovoltaic frequency converter with weak power
  • Device for satisfying power supply by photovoltaic frequency converter with weak power

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1: as figure 2 As shown, it includes a charging circuit 1 , a control circuit 2 , an electrical storage device 3 and an output circuit 4 . The circuit connection mode is that the G pole of the field effect transistor Q1 of the charging circuit 1 is connected to one end of the R2 of the control circuit 2, the S pole of the field effect transistor Q1 is connected to one end of the R1 of the charging circuit 1, and simultaneously connected to the negative pole of the DC input. The D pole of the field effect transistor Q1 is connected to the other end of R1 of the charging circuit 1 , and is connected to the negative poles of all capacitors in the power storage device 3 . The CLO terminal of the control chip U1 of the control circuit 2 is connected to the other end of R2 of the control circuit 2, the V terminal of the control chip U1 of the control circuit 2 is connected to the positive pole of the DC input, and the LO1 terminal of the control chip U1 of the con...

Embodiment 2

[0013] Embodiment 2: as image 3 As shown, in Embodiment 2, the energy storage device is replaced by a storage battery by a capacitor, and other structures are the same as in Embodiment 1.

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Abstract

The invention discloses a method for satisfying power supply by photovoltaic frequency converter with weak power. The photovoltaic frequency converter comprises a charging circuit, a control circuit, an accumulating device and an output circuit. The method leads the photovoltaic frequency converter to collect and store electricity emitted by weak sunshine and supply the electricity to a frequency converter output when achieving a certain capacity for driving a motor, so that the photovoltaic frequency converter can also work discontinuously with weak sunshine, and the utilization rate of the sunshine energy by the photovoltaic frequency converter is improved. The method for satisfying power supply by photovoltaic frequency converter with weak power is particularly suitable for the remote western region with insufficient power supply, the photovoltaic frequency converter drives a water pump system to rationally develop underground water resources; therefore, the method for satisfying power supply by photovoltaic frequency converter with weak power has great significance for solving problems of drinking water and agricultural water, and improving ecological environment in the western region.

Description

1. Technical field [0001] The invention relates to a device for the weak power of a photovoltaic inverter to meet power supply, which belongs to the field of electronic technology 2. Background technology [0002] At present, in the field of photovoltaic inverters, the photovoltaic inverter usually determines the output frequency of the photovoltaic inverter according to the input power of the solar battery. When the sunlight weakens and the power supplied by the solar battery is too low, the photovoltaic inverter will stop at this time. output, the dragged motor stops running. However, at this time, the solar cell is still able to provide electric energy, but the power is relatively weak, that is to say, at this time, the electric photovoltaic inverter generated by the solar energy cannot be used but is wasted, which is undoubtedly for the precious solar power generation resources. It is a great loss. [0003] There are still millions of farmers and herdsmen without power...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N6/00H02J7/00H02M3/155
CPCY02E10/56
Inventor 傅定文韩莉娅庄勇杨建国夏义军
Owner EOPLLY NEW ENERGY TECH