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Photovoltaic inverter system and control method thereof

A photovoltaic inverter and control method technology, applied in the field of photovoltaic inverter system and its control, can solve the problems of no voltage output, loss, transmission data energy signal interference, etc., and achieve the effect of high reliability, perfect function and simple topology

Active Publication Date: 2020-01-10
DELTA ELECTRONICS (SHANGHAI) CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, the use of the optimizer needs to communicate with the back-stage inverter, but because the modulation and demodulation circuit is added, the cost is high, and the transmitted data is easily interfered by the energy signal
[0004] In addition, during the start-up process of the photovoltaic system, sometimes several optimizers temporarily have no voltage output due to the occlusion of dark clouds or building shadows
In the past photovoltaic optimizer start-up scheme, this part of the optimizer will not be able to start, which also causes waste of power devices and loss of economic benefits

Method used

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  • Photovoltaic inverter system and control method thereof
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  • Photovoltaic inverter system and control method thereof

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Embodiment Construction

[0052] The present invention is described in further detail below in conjunction with accompanying drawing and specific embodiment: present embodiment is carried out under the premise of technical solution of the present invention, has provided embodiment and operation process, but protection scope of the present invention is not limited to following Example.

[0053] Please refer to the following figure 1, figure 1 It is a structural schematic diagram of the first embodiment of the photovoltaic inverter system of the present invention. like figure 1 As shown, the photovoltaic inverter system of the present invention includes: an optimized component string 1 and an inverter 2; the optimized component string includes a plurality of optimized components 11...1n, and the input end of each optimized component 11...1n is coupled to at least one photovoltaic component , the photovoltaic assembly can be a PV panel, wherein n is a positive integer, and the output ends of a pluralit...

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Abstract

The invention discloses a photovoltaic inverter system and a control method thereof. The photovoltaic inverter system comprises an optimization assembly string and an inverter. The optimization assembly string includes a plurality of optimization assemblies; input terminals of all optimization assemblies are coupled with at least one photovoltaic assembly; and output terminals of the plurality ofoptimization assemblies are connected in series. Each optimization assembly includes a control unit. The input terminal of the inverter is coupled to the output terminal of the optimization componentstring. The inverter includes an auxiliary detection module that is used for assisting in detecting the output current of the optimization assembly string. The control units are used for controlling the output voltage of the optimization assembly string according to the output current of the optimization assembly string, so that the output voltage meets the starting condition of the inverter.

Description

technical field [0001] The invention relates to a photovoltaic inverter system and a control method thereof, in particular to a photovoltaic inverter system and a control method thereof that do not require traditional communication between an inverter and an optimization component. Background technique [0002] At present, photovoltaic power generation technology has developed maturely and has been widely used at home and abroad. The photovoltaic power generation system includes photovoltaic panels, junction boxes, inverters, etc. The photovoltaic panels convert the received solar energy into DC power, and the inverter converts the DC power into the required AC power, which is integrated into the grid or directly supplied to customers. use. [0003] The photovoltaic inverter system using the optimizer can ensure the maximum power tracking output of the photovoltaic panel and improve its conversion efficiency. The photovoltaic panels connected in series and parallel have hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02S40/32H02J3/38H02M7/42
CPCH02M7/42H02S40/32Y02E10/56
Inventor 朱选才翁炳文王沁赵卫王斌
Owner DELTA ELECTRONICS (SHANGHAI) CO LTD
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