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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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  • Claims
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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, large loss, serious heat generation, and high cost; in addition, the system requires an additional compensator, which increases system cost and control. the complexity

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  • Series photovoltaic optimization system and control method thereof

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Embodiment Construction

[0021] The present invention will be further described now in conjunction with accompanying drawing.

[0022] see figure 1 , figure 1 What is shown is an embodiment of the present invention. The tandem photovoltaic optimization system 100 provided in this embodiment consists of n photovoltaic panels 101 1 -101 n , n represents a random number, representing the number of battery panels in a string, such as 10, 20, etc., n series photovoltaic optimizers 102 1 -102 n and a centralized converter 103, where the series photovoltaic optimizer 102 1 -102 n The input terminal of the photovoltaic panel 101 1 -101 n The outputs of the parallel, series photovoltaic optimizer 102 1 -102 n The output terminal of the photovoltaic panel 101 1 -101 n The output terminals of the DC equipment are connected in series to form a DC equipment string 106. A DC equipment string or multiple DC equipment strings are connected in parallel to form a high-voltage DC bus 105. Finally, the DC bus ...

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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...

Claims

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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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