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Photovoltaic system and wind-solar complementary power station

A photovoltaic system and power station technology, which is applied in the field of photovoltaic systems and wind-solar hybrid power stations, can solve the problems of photovoltaic system safety hazards and the reduction of total power generation of the system, and achieve the effects of strong anti-shading ability, high power generation, and long life

Pending Publication Date: 2022-03-25
HUANENG CLEAN ENERGY RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

In order to obtain a larger voltage in a photovoltaic system, generally 20-30 photovoltaic groups are connected in series to form a photovoltaic string, and then the strings are connected in parallel. The mismatch of multiple components in series is manifested in the "barrel effect" in the photovoltaic system. That is, the failure of a small number of components in the system will cause a large reduction in the total power generation of the system
The impact of shading on photovoltaic systems is particularly serious, because even a small amount of shading by a single component can cause the overall power of the entire string of photovoltaic strings, and the hot spot effect caused by shading will bring safety hazards to the photovoltaic system

Method used

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  • Photovoltaic system and wind-solar complementary power station
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Embodiment Construction

[0037] Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0038] The following describes a photovoltaic system 100 according to an embodiment of the present invention with reference to the accompanying drawings, such as Figure 1-Figure 5 As shown, the photovoltaic system 100 according to the embodiment of the present invention includes multiple sets of photovoltaic strings 1 and multiple MPPT controllers 2 (power optimizers).

[0039] Each group of photovoltaic strings 1 includes a plurality of photovoltaic modules 11 serially connected in sequence, that is, a plurality of photovoltaic modules 11 are connected in series to form a photovoltaic string 1 . Each photovoltaic module 11 in the photovoltaic string 1 is conne...

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Abstract

The embodiment of the invention provides a photovoltaic system and a wind-solar hybrid power station. According to the embodiment of the invention, the photovoltaic system comprises a plurality of groups of photovoltaic group strings and a plurality of MPPT controllers, each group of photovoltaic group strings comprises a plurality of photovoltaic modules which are sequentially connected in series, and each photovoltaic module in the photovoltaic group strings is connected with each photovoltaic module in the adjacent group of photovoltaic group strings in parallel; and each group of photovoltaic group strings in the plurality of groups of photovoltaic group strings serves as a unit and is connected with the MPPT controller. The photovoltaic system provided by the embodiment of the invention has the advantages of high generating capacity, strong anti-shielding capability, high system stability and long service life.

Description

technical field [0001] The invention relates to the technical field of photovoltaic systems, in particular to a photovoltaic system and a wind-solar hybrid power station. Background technique [0002] Photovoltaic system is a typical power supply series-parallel system, and series-parallel mismatch is a very important factor affecting its power. In order to obtain a larger voltage in a photovoltaic system, generally 20-30 photovoltaic groups are connected in series to form a photovoltaic string, and then the strings are connected in parallel. The mismatch of multiple components in series is manifested in the "barrel effect" in the photovoltaic system. That is, the failure of a small number of components in the system will cause a large reduction in the total power generation of the system. The impact of shading on photovoltaic systems is particularly serious, because even a small amount of shading by a single component can cause the overall power of the entire string of pho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02S10/12H02S40/34H02S40/30
CPCH02S10/12H02S40/34H02S40/30Y02E10/50
Inventor 罗丽珍彭文博虞祥瑞肖平赵东明李晓磊高虎施悦葛恒田鸿翔陈雄飞
Owner HUANENG CLEAN ENERGY RES INST
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