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Photovoltaic grid-connected generation system for achieving maximum power point tracking of photovoltaic assemblies in any lighting condition

A photovoltaic module, grid-connected power generation technology, applied in photovoltaic power generation, AC network circuits, electrical components, etc., can solve the problem of not guaranteeing the maximum power output of the module, and achieve the effect of long normal working time and system stability

Inactive Publication Date: 2016-03-02
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

However, if the output characteristics of each photovoltaic module are not the same, especially in the case of partial shading of the array illumination, the power-voltage output characteristics of the array are generally multi-peak curves, although the traditional GMPPT control strategy can realize the array The overall maximum power output, however, does not guarantee the maximum power output of all components

Method used

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  • Photovoltaic grid-connected generation system for achieving maximum power point tracking of photovoltaic assemblies in any lighting condition
  • Photovoltaic grid-connected generation system for achieving maximum power point tracking of photovoltaic assemblies in any lighting condition
  • Photovoltaic grid-connected generation system for achieving maximum power point tracking of photovoltaic assemblies in any lighting condition

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Embodiment Construction

[0026] The specific implementation manner of the present invention will be explained in detail below in conjunction with the accompanying drawings.

[0027] The photovoltaic power generation system is a two-stage photovoltaic power generation grid-connected system. figure 1 shown. It consists of the following parts: photovoltaic array, Boost, inverter, filter and grid. The output end of the photovoltaic module is connected to the input end of the Boost circuit, and then connected to the inverter, and the output end of the inverter is connected to the grid through a filter.

[0028] Described photovoltaic array is to be connected with photovoltaic component by buck circuit to form photovoltaic component module photovoltaic component module (such as figure 2 shown), and then use photovoltaic module modules in series and parallel to form a photovoltaic array, such as image 3 shown.

[0029] The photovoltaic array is an array composed of photovoltaic modules and buck modules...

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Abstract

The invention discloses a photovoltaic grid-connected generation system for achieving maximum power point tracking of photovoltaic assemblies in any lighting condition. The photovoltaic assemblies are connected with a buck circuit to form a photovoltaic assembly module (PV-buck Module); series-parallel connection is carried out according to the actual power requirements to form a photovoltaic array (PV-buck Array); maximum power output of all photovoltaic assemblies in the lighting condition and the condition with a partial shadow can be achieved by combining a reasonable control mode; and the shortage that the photovoltaic assembly with the partial shadow of a traditional photovoltaic array under the global maximum power point tracking (Global Maximum Power Point Tracking, GMPPT for short) is free of output or low in output power is compensated by a photovoltaic cell to the maximal extent.

Description

technical field [0001] The invention relates to the field of new energy power generation, in particular to the technical field of maximum power tracking in photovoltaic grid-connected power generation systems, in particular to a photovoltaic grid-connected power generation system that realizes maximum power tracking of photovoltaic modules under any lighting conditions. Background technique [0002] Because it is clean and inexhaustible, solar energy has become an indispensable part of the new energy field, and photovoltaic cell power generation is the most important way to utilize solar energy. Due to the limited capacity of a single photovoltaic cell, it is usually necessary to connect dozens of photovoltaic cells in series and parallel to form a photovoltaic module, but its power is still small, only a few hundred watts. For a photovoltaic power station, it is usually necessary to connect photovoltaic modules in series and parallel to form a photovoltaic array and then co...

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 甘义良杭丽君李国杰
Owner SHANGHAI JIAO TONG UNIV
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