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Intelligent hibernate system and method for photovoltaic inverter

A photovoltaic inverter and inverter technology, applied in photovoltaic power generation, AC network circuits, electrical components, etc., can solve problems such as easy damage of grid-connected contactors, prolong life, reduce the number of times of entering and exiting dormancy, and ensure The effect of longevity

Active Publication Date: 2016-07-20
SUZHOU INOVANCE TECH CO LTD
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a photovoltaic inverter intelligent dormancy system and method for the problem that the grid-connected contactor is easily damaged due to the frequent shutdown of the inverter module in the above photovoltaic inverter

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  • Intelligent hibernate system and method for photovoltaic inverter
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  • Intelligent hibernate system and method for photovoltaic inverter

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Embodiment Construction

[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0031] Every day, the sun's light intensity is low in the morning, then gradually rises, reaches its maximum at noon, and then gradually decreases. In the state of stable light intensity, the output power of photovoltaic cells (that is, solar panels) is as follows: figure 2 shown. It can be seen from the above histogram that no matter how the sunlight intensity changes, before a certain time t1 in the morning, the output power of the photovoltaic cell must be less than the set value (for example, the output of the inverter module with the smallest total power generation in the photovoltaic invert...

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Abstract

The invention provides an intelligent hibernate system and method for a photovoltaic inverter. The photovoltaic inverter comprises a plurality of inverter modules. The intelligent hibernate system comprises a starting control module and a shutdown control module, wherein the starting control module enables the plurality of inverter modules enter into working state sequentially according to the output power of photovoltaic cells and power-on conditions of each inverter module when the photovoltaic inverter is powered on, and the shutdown control module enables at least one inverter module enter into a hibernate mode according to preset shutdown time when all inverter modules enter into the work state. The preset shutdown time associates with the output power change of the preset photovoltaic cells within multiple days. Corresponding inverter modules enter into the hibernate state according to illumination intensity change and preset shutdown time, and the times of inverter modules enter into and exit from the hibernate state can be reduced substantially.

Description

technical field [0001] The invention relates to the field of photovoltaic inverters, and more specifically, to an intelligent dormancy system and method for photovoltaic inverters. Background technique [0002] Dormancy technology is a special technology for system optimization in parallel-connected photovoltaic inverter systems. like figure 1 As shown, when the light intensity is low, the photovoltaic cell 11 can only output low power, and the photovoltaic inverter system will turn off one or more inverter modules 12, so that these inverter modules 12 enter a dormant state; The intensity increases from low to high, and when the photovoltaic cell 11 outputs higher power, the photovoltaic inverter system wakes up the dormant inverter module 12 to make it generate electricity again. In the above sleep technology, the photovoltaic inverter shuts down or wakes up the inverter module 12 according to the hysteresis, for example, when the output power of the photovoltaic cell 11 ...

Claims

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Application Information

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IPC IPC(8): H02J3/38
CPCH02J3/383Y02E10/56
Inventor 李龙文王建俊
Owner SUZHOU INOVANCE TECH CO LTD
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