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Photovoltaic system power optimizer intelligent control method

A power optimizer and photovoltaic system technology, applied in the field of solar photovoltaic power generation, can solve the problems of temperature rise or damage of components, low and different power generation of photovoltaic systems, etc., and achieve the effect of improving loss

Inactive Publication Date: 2018-06-19
成都创达自动化控制有限公司
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AI Technical Summary

Problems solved by technology

[0002] Due to components mismatch, dust, shadow occlusion, component temperature rise or damage (hot spot effect), the actual power generation of the photovoltaic system is 26% lower than the theoretical value, and the photovoltaic power station can improve the efficiency of the power station by installing a component-level power optimizer. Power generation, but the actual optimization effect will be different due to weather, occlusion and other reasons. Among them, in the case of no occlusion, after the system is connected to the power optimizer, the actual output power is different from that before the connection due to the loss of the optimizer itself. The power is reduced compared to

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  • Photovoltaic system power optimizer intelligent control method

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Embodiment Construction

[0023] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0024] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0025] Such as figure 1 Shown, the steps that the present invention takes in concrete implementation are as follows:

[0026] 1. The gateway collects the voltage U, current I, power P of each photovoltaic module, and the string number G and module number L corresponding to each module, and transmits them to the background monitoring system.

[0027] 2. The background monitoring system calculates the power of each string P(G n ).

[0028] 3. Calculate the power of all strings {P(G n )} in the maximum value P(G) MAX .

[0029] 4. Combine any other string with P(G) MAX Subtract to obtain the power difference ΔP.

[0030] Determine whether the absolute value of the power difference |...

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Abstract

The invention provides an intelligent control method for a photovoltaic system power optimizer. The intelligent control method collects electrical signal data from a photovoltaic array and transmits the electrical signal data to a background monitoring system; the background monitoring system devices whether to execute work through the power optimizer by judging power. By means of the series power difference, whether photovoltaic strings are shielded or not is judged, the power optimizer is closed when the photovoltaic strings are not shielded, the situation that due to loss of the power optimizer, when the photovoltaic strings are not shielded, power is lowered can be improved, the photovoltaic system can still output maximum power when the photovoltaic strings are not shielded, and the situation that due to loss of the power optimizer, the power is lowered can be avoided.

Description

technical field [0001] The invention belongs to the technical field of solar photovoltaic power generation, and in particular relates to an intelligent control method for a photovoltaic system power optimizer. Background technique [0002] Due to components mismatch, dust, shadow occlusion, component temperature rise or damage (hot spot effect), the actual power generation of the photovoltaic system is 26% lower than the theoretical value, and the photovoltaic power station can improve the efficiency of the power station by installing a component-level power optimizer. Power generation, but the actual optimization effect will be different due to weather, occlusion and other reasons. Among them, in the case of no occlusion, after the system is connected to the power optimizer, the actual output power is different from that before the connection due to the loss of the optimizer itself. The power is reduced in comparison. Contents of the invention [0003] In view of this, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38
CPCH02J3/385Y02E10/56
Inventor 黄跃龙陈涛何巍顾泽琳张会龙
Owner 成都创达自动化控制有限公司