High-efficiency low-loss hardware circuit of photovoltaic cell panel output power optimizer

A photovoltaic panel and output power technology, applied in photovoltaic power generation, photovoltaic modules, electrical components, etc., can solve the problems of not having isolation protection function, unable to eliminate the heat island effect of faulty panels, etc., and achieve the effect of improving safety and reliability

Active Publication Date: 2015-04-08
SHENZHEN WINLINE TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

The system only provides the MPPT function, and cannot eliminate the heat island effect of the faulty b...

Method used

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  • High-efficiency low-loss hardware circuit of photovoltaic cell panel output power optimizer
  • High-efficiency low-loss hardware circuit of photovoltaic cell panel output power optimizer
  • High-efficiency low-loss hardware circuit of photovoltaic cell panel output power optimizer

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Embodiment Construction

[0024] The principles and features of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. The described embodiments are only used to explain the present invention, not to limit the scope of the present invention.

[0025] Such as figure 2 As shown, a high-efficiency and low-power photovoltaic panel output power optimizer hardware circuit includes controlled electronic switches S1, S2, S3, S4, and S5, which can be, for example, semiconductor switches, diodes D1, D2, D3, D4, D5, inductance L, energy storage capacitors C1, C2, sampling resistor R1; PV panel strings are connected from the input terminals PV+ and PV-, and substrings in the PV panel strings are respectively connected to PVS1 and PVS2 (PV+ and PVS2 , PVS2 and PVS1, PVS1 and PV- are respectively connected to a group of battery board sub-strings, forming a three-level battery board string), the positive pole of ...

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Abstract

The invention relates to a high-efficiency low-loss hardware circuit of a photovoltaic cell panel output power optimizer. The hardware circuit comprises a circuit for maximizing the output power of a single photovoltaic cell panel set string; a circuit for disconnecting the output of cell panels in the string when the current loss of the photovoltaic cell panel set string is detected; circuits of bypass shading cell panel substrings and an output current sampling circuit. Because of low-pressure-drop power MOSFETs, the whole circuit has the advantages that high efficiency and low loss are achieved in control over the output power of the photovoltaic cell panels; because of output disconnection between the bypasses of shading cell panels and a cell panel which breaks down, it can be guaranteed that the output power of the whole cell panel array is maximum; moreover, when a system breaks down, output is rapidly closed to isolate the fault, safety and reliability are improved.

Description

technical field [0001] The invention relates to a hardware circuit of a high-efficiency and low-loss (power consumption) photovoltaic panel output power optimizer, which belongs to the field of direct current power circuits. Background technique [0002] No part of the photovoltaic panel array can be shaded, if any cells are shaded, they will not generate current and will be reverse biased, which means that the shaded components will consume power and heat, over time , forming a fault. This is the so-called heat island effect. [0003] To prevent the heat island effect, solar panels are generally placed at an angle so that the surface cannot be attached to the shield. However, accidental shading is unavoidable, so bypass diodes are often used for protection. Bypass diodes can prevent the current from flowing from strong current branches to weak current branches due to branch faults or shading. The voltage drop of each diode is 0.4-0.7V, so the loss generated by the diodes...

Claims

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Application Information

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IPC IPC(8): H02S40/30G05F1/67
CPCG05F1/67H02S40/00Y02E10/56
Inventor 朱建国杨耀
Owner SHENZHEN WINLINE TECH
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