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Device for restraining PID effect of photovoltaic panel

A battery panel and effect technology, applied in the direction of photovoltaic power generation, electrical components, photovoltaic modules, etc., can solve the problems of increasing the risk of electric shock at night, increasing the risk of contact electric shock, etc., so as not to affect the insulation resistance detection, low cost, and improve ground protection The effect of voltage

Active Publication Date: 2014-08-06
SINENG ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the first option will increase the risk of electric shock due to the negative grounding of the battery board, and the second option requires an additional power supply device, and will increase the risk of electric shock at night

Method used

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  • Device for restraining PID effect of photovoltaic panel
  • Device for restraining PID effect of photovoltaic panel
  • Device for restraining PID effect of photovoltaic panel

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Please refer to figure 1 as shown, figure 1 It is a schematic diagram of the application of the device for suppressing the PID effect of the solar panel provided by Embodiment 1 of the present invention.

[0020] The device for suppressing the PID effect of the battery panel in this embodiment includes a voltage boosting circuit 101 , and the neutral point of the transformer 102 of the photovoltaic power station is conveniently connected to the voltage boosting circuit 101 . The voltage boosting circuit 101 is connected between the neutral point of the transformer 102 and the ground.

[0021] Such as figure 2 As shown, in this embodiment, the voltage boosting circuit 101 includes a switch S1, a resistor R1, a resistor R2, and a voltage source V1; one end of the switch S is connected to the neutral point, the other end is connected to one end of the resistor R1, and the other end of the resistor R1 is connected to the neutral point. One end is connected to one end of...

Embodiment 2

[0031] Please refer to image 3 as shown, image 3 It is a schematic diagram of the application of the device for suppressing the PID effect of the solar panel provided by the second embodiment of the present invention.

[0032] This embodiment is designed for the situation that the neutral point of the transformer 301 of the photovoltaic power station is inconvenient to be connected to the voltage boosting circuit 302 . In this embodiment, the device for suppressing the PID effect of the battery panel includes a neutral point forming circuit 303 and a voltage boosting circuit 302 . The neutral point forming circuit 303 is connected to the AC side of the photovoltaic power station to form a neutral point, and the voltage boosting circuit 302 is connected between the neutral point forming circuit 303 and the ground.

[0033] In this embodiment, if figure 2 As shown, the voltage boost circuit 302 includes a switch S1, a resistor R1, a resistor R2, and a voltage source V1; on...

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Abstract

The invention discloses a device for restraining the PID effect of a photovoltaic panel. According to the device, the voltage to ground of a neutral point on the alternating-current boosting side of a photovoltaic power station is boosted through a voltage boosting circuit so that the voltage to ground of the preceding photovoltaic panel of an inverter can be boosted, the photovoltaic panel has positive bias relative to the ground, and the PID effect of the photovoltaic panel can be restrained. According to the device, not all the inverters or photovoltaic panels need to be processed, and the device has the advantages that the device is easy to implement and low in cost, detection of insulation resistance is not influenced, and the device is particularly suitable for the application that serial-type photovoltaic inverters are used for building a photovoltaic power station.

Description

technical field [0001] The invention relates to the technical field of photovoltaic power generation, in particular to a device for suppressing the PID effect of a solar panel. Background technique [0002] Potential-induced decay (Potential-induced de g Radiation, PID) effect means that under the long-term negative bias high voltage of the battery panel components, there is a leakage current between the glass and the packaging material, a large amount of charge accumulates on the surface of the battery sheet, and the passivation effect of the battery surface deteriorates, resulting in a fill factor of FF, The short-circuit current Isc and the open-circuit voltage Voc decrease, making the performance of the component lower than the design standard. There are two traditional methods to suppress the PID effect of the battery board: 1. Ground the negative pole of the battery board; 2. Apply a positive pressure between the negative pole of the battery board and the ground at ni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02S40/30
CPCY02E10/50
Inventor 岳炜赵龙钮良
Owner SINENG ELECTRIC CO LTD
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