Series photovoltaic optimization system and control method thereof

A control method and series technology, applied in photovoltaic power generation, AC network circuits, electrical components, etc., can solve the problems of increasing system cost, control complexity, serious heating, high power, etc., and achieve high stability and low self-loss , the effect of increased power generation

Inactive Publication Date: 2018-09-07
上海盐巴信息科技有限公司
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  • Abstract
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Problems solved by technology

However, this optimizer connection method determines that the optimizer needs to convert all the power of the components, which has the disadvantages of high power, l

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  • Series photovoltaic optimization system and control method thereof

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[0021] The present invention will now be further explained with reference to the drawings.

[0022] See figure 1 , figure 1 Shown is an embodiment of the present invention. The tandem photovoltaic optimization system 100 provided in this embodiment is composed of n photovoltaic panels 101 1 -101 n , N represents a random number, which represents the number of panels in a string, such as 10, 20, etc., n series photovoltaic optimizers 102 1 -102 n And a centralized converter 103, in which the series photovoltaic optimizer 102 1 -102 n The input terminal and photovoltaic panel 101 1 -101 n The output terminals of the inverter are connected in parallel, and the series photovoltaic optimizer 102 1 -102 n The output terminal and photovoltaic panel 101 1 -101 n The output ends of the DC equipment are connected in series to form a DC device string 106. A DC device string or multiple DC device strings are connected in parallel to form a high voltage DC bus 105. Finally, the DC bus 105 is c...

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Abstract

The invention discloses a series photovoltaic optimization system and a control method thereof. The input end of each series photovoltaic optimizer is connected with the output of a corresponding photovoltaic panel in parallel, the output end of each series photovoltaic optimizer is connected with the output end of the corresponding photovoltaic panel in series, and the series photovoltaic optimizers enable each photovoltaic panel to realize the maximum power output through a mode of converting the unmatched energy from parallel connection into series connection, thereby effectively solving aproblem that the generating capacity of the system is reduced duo to the unmatched photovoltaic panels in a string. In addition, the series photovoltaic optimizers only convert the unmatched energy, so that the optimizers have the advantages of low power, low loss, small amount of generated heat and low cost.

Description

technical field [0001] The invention belongs to the technical field of new energy, and relates to a maximum power tracking technology of a grid-connected photovoltaic panel power generation system, in particular to a serial photovoltaic optimization system and a control method thereof. Background technique [0002] The development and utilization of new energy generation technologies such as solar energy is an important measure to deal with energy and environmental crises. Due to the high cost of photovoltaic power generation equipment and low energy conversion efficiency, which greatly increases the cost of power generation and limits the promotion and application of photovoltaic power generation technology, it is particularly urgent and important to improve the efficiency of photovoltaic power generation. [0003] A photovoltaic power generation system usually consists of multiple photovoltaic panels connected in series to form strings, and a single string or multiple stri...

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Application Information

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IPC IPC(8): H02J3/38
CPCH02J3/385Y02E10/56
Inventor 孟令孔揭东华宋朝盛
Owner 上海盐巴信息科技有限公司
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