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Photovoltaic optimization system based on bus optimization and control method thereof

A control method and line-type technology, applied in photovoltaic power generation, AC network circuits, electrical components, etc., can solve the problems of high power, serious heat generation, large loss, etc., and achieve the effect of low power, low heat generation, and low loss.

Inactive Publication Date: 2018-06-19
上海盐巴信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a photovoltaic optimization system based on bus compensation and its control method, which is used to solve the problem of large power caused by the photovoltaic optimizer in the prior art when overcoming the mismatch problem. , large loss, serious heating and other problems

Method used

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  • Photovoltaic optimization system based on bus optimization and control method thereof
  • Photovoltaic optimization system based on bus optimization and control method thereof

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Embodiment 1

[0050] Such as figure 1 As shown, this embodiment provides a photovoltaic optimization system based on bus compensation, and the photovoltaic optimization system based on bus compensation includes: a string 10 and an inverter 2 .

[0051] Such as figure 1 As shown, the string 10 includes a plurality of photovoltaic components 101 and a plurality of power optimizers 102 corresponding to the plurality of photovoltaic components 101 one by one.

[0052] Specifically, the output terminals of each photovoltaic module 101 are serially connected in series for converting light energy into electrical energy.

[0053] More specifically, in this embodiment, the number of the photovoltaic modules 101 is recorded as n, and in practical applications, the number of the photovoltaic modules 101 can be set according to the requirements of the scale of use, power generation demand, etc., in this embodiment Not repeat them one by one. In this embodiment, the photovoltaic module 101 (also called...

Embodiment 2

[0066] Such as figure 2 As shown, this embodiment provides a photovoltaic optimization system based on bus compensation, and the photovoltaic optimization system based on bus compensation includes: a plurality of strings and inverters 2 .

[0067] Such as figure 2 As shown, each string is connected in parallel, and each string includes a plurality of photovoltaic modules, a plurality of power optimizers and string compensators corresponding to the plurality of photovoltaic modules.

[0068] Specifically, in this embodiment, m strings are included, namely the first string 11, the second string...the mth string 12, and each string forms a photovoltaic module array with n rows and m columns. The structure of each group string is the same. Here, only the first group string 11 is taken as an example for illustration. The output terminals of each photovoltaic module 111 in the first group string 11 are connected in series in sequence, the input terminal of each power optimizer 1...

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Abstract

The invention provides a photovoltaic optimization system based on bus optimization and a control method thereof. The system comprises a string and an inverter. The string comprises a plurality of photovoltaic modules connected in series, power optimizers in one-to-one correspondence with the photovoltaic components, and string compensators which are connected to the photovoltaic components in series. According to the maximum power point tracking control principle, the power of each photovoltaic component in the same string is adjusted, a current difference at a maximum power point between photovoltaic modules is compensated, the problem of series coupling is solved, a voltage difference between strings is compensated based the output voltage of each string compensator, the problem of parallel coupling is solved, and each photovoltaic module works at the maximum power point. The photovoltaic optimization system and the control method have the advantages of high efficiency, low loss andlow cost, the problem of the series coupling of the modules is solved by a compensation bus between the power optimizers, the problem of parallel coupling of the modules is solved by the compensationbus between the power optimizers and the string compensators, the system and the method can be used for a single-string system or a multi-string parallel system, and the system matching is flexible and convenient.

Description

technical field [0001] The invention relates to the field of new energy technology, in particular to a photovoltaic optimization system based on bus type compensation and a control method thereof. Background technique [0002] With the increasing consumption of petrochemical energy and the gradual emergence of environmental problems, the use of clean energy has become more and more common, especially photovoltaic power generation, which has become an indispensable part of power supply. The main principle of photovoltaic power generation is the photoelectric effect of semiconductors. When a photon irradiates a metal, its energy can be completely absorbed by an electron in the metal. The energy absorbed by the electron is large enough to overcome the internal gravitational force of the metal and escape from the metal surface. , become photoelectrons; silicon atoms have 4 outer electrons, if doped with 5 outer electrons such as phosphorus atoms in pure silicon, it becomes an N-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
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