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Photovoltaic inverter

A technology for photovoltaic inverters and photovoltaic panels, applied in photovoltaic modules, photovoltaic power generation, instruments, etc., can solve the problems of reduced overall efficiency and large energy loss of inverters, and achieve improved overall efficiency, AC voltage, and improved Tracking the effect of the effect

Inactive Publication Date: 2015-04-29
SHENZHEN INOVANCE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an inverter that can reduce energy loss while increasing the output voltage and improve the MPPT tracking effect in view of the defects of the prior art that the above-mentioned energy loss is large and the overall efficiency of the inverter is reduced. Photovoltaic inverter

Method used

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Embodiment Construction

[0021] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0022] refer to figure 2 , is a schematic structural diagram of a preferred embodiment of the photovoltaic inverter of the present invention;

[0023] The photovoltaic inverter of the present invention includes a control circuit 1, an inverter circuit 2 that converts direct current into alternating current under the control of the control circuit 1, and also includes a first photovoltaic electric panel PV1, a second photovoltaic electric panel PV2, an auxiliary power Regulating circuit 3;

[0024] Both the negative pole of the first photovoltaic panel PV1 and the positive pole of the second photovoltaic panel PV2 are grounded, and the positive pole of the first photovoltaic panel PV1 is connected to the positive DC bu...

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Abstract

The invention discloses a photovoltaic inverter which comprises a control circuit, an inversion circuit, a first photovoltaic electric plate, a second photovoltaic electric plate and an auxiliary power regulating circuit. Both a cathode of the first photovoltaic electric plate and an anode of the second photovoltaic electric plate are grounded; an anode of the first photovoltaic electric plate is connected to a positive DC (Direct Current) bus; a cathode of the second photovoltaic electric plate is connected to a negative DC bus; both the inversion circuit and the auxiliary power regulating circuit are connected between the positive and negative DC buses and the auxiliary power regulating circuit and the inversion circuit are also connected to a control circuit; the auxiliary power regulating circuit regulates current flowing through the first photovoltaic electric plate and the second photovoltaic electric plate when the maximum power working point current of the first photovoltaic electric plate is unequal to that of the second photovoltaic electric plate, so that the first photovoltaic electric plate and the second photovoltaic electric plate are respectively positioned at the maximum power working points; when the maximum power working point current of the first photovoltaic electric plate is equal to that of the second photovoltaic electric plate, the auxiliary power regulating circuit stops working. According to the photovoltaic inverter, when an output voltage is improved, energy loss is reduced and an MPPT (Maximum Power Point Tracking) effect is improved.

Description

technical field [0001] The invention relates to an inverter for converting DC electric energy into AC electric energy, in particular to a photovoltaic inverter capable of increasing AC output voltage while reducing energy loss and improving MPPT tracking effect. Background technique [0002] refer to figure 1 , Traditional photovoltaic inverters usually use DC / DC plus DC / AC to convert direct current into alternating current, specifically including photovoltaic panels PV, DC / DC circuits, and inverter circuits connected in sequence. The above-mentioned DC / DC circuit is composed of energy storage inductor L', power switch G2' and diode D', and is used to boost the DC voltage output by the photovoltaic panel PV and output it to the DC bus, so as to improve the output of the inverter circuit to the grid. AC voltage. [0003] In this traditional circuit, the electrical energy output by the solar photovoltaic panel PV must pass through the energy storage inductor L' and the diode...

Claims

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Application Information

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IPC IPC(8): H02S40/32H02M7/5387G05F1/67
CPCG05F1/67H02M7/53873H02S40/00Y02E10/56
Inventor 刘玉伟
Owner SHENZHEN INOVANCE TECH
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