WO2019198108A1 - Système et procédé d'augmentation de gain de puissance de champ dans des modules photovoltaïques - Google Patents

Système et procédé d'augmentation de gain de puissance de champ dans des modules photovoltaïques Download PDF

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Publication number
WO2019198108A1
WO2019198108A1 PCT/IN2019/050303 IN2019050303W WO2019198108A1 WO 2019198108 A1 WO2019198108 A1 WO 2019198108A1 IN 2019050303 W IN2019050303 W IN 2019050303W WO 2019198108 A1 WO2019198108 A1 WO 2019198108A1
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WO
WIPO (PCT)
Prior art keywords
photovoltaic
photovoltaic modules
modules
array
photovoltaic array
Prior art date
Application number
PCT/IN2019/050303
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English (en)
Inventor
Seshadri DEVANADHAN
Arunachalam V.
Original Assignee
Tata Solar Power Systems Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tata Solar Power Systems Limited filed Critical Tata Solar Power Systems Limited
Publication of WO2019198108A1 publication Critical patent/WO2019198108A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S20/00—Supporting structures for PV modules
    • H02S20/10—Supporting structures directly fixed to the ground
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/10—Photovoltaic [PV]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

Definitions

  • the present invention relates generally to a system and method of increasing field power gain in photovoltaic (PV) modules; more specifically, the invention relates to a unique positioning of the photovoltaic modules to optimize the generation of energy in a photovoltaic array.
  • PV photovoltaic
  • a traditional solar power system consists of an array of photovoltaic (PV) modules called a photovoltaic panel arranged together on different kinds of surfaces, especially the roofs of commercial and residential buildings.
  • PV photovoltaic
  • the photovoltaic modules produce more output when direct sunlight falls on the surface area of photovoltaic arrays. It is important that the photovoltaic arrays are pointed or orientated directly to face sun ⁇ s radiant energy, thereby producing maximum energy and extracting most energy out of solar panel arrangement. Getting the correct orientation to obtain optimum output is not easy.
  • Standard rooftop racking systems are optimized for vertical mounting. Installing photovoltaic modules with a horizontal orientation requires more rows, and consequently, more hardware. For example, a rooftop system containing twelve photovoltaic modules requires three rows of four photovoltaic modules in a landscape configuration. Whereas, in a portrait orientation, two rows of six modules each are required. More rows require more mounting clamps and standoffs thereby increasing photovoltaic hardware costs and complicated wiring. With less hardware, portrait installation is much easier and quicker to complete.
  • the main test to grab maximum benefit of free solar power is to ensure that the photovoltaic solar panel or a complete photovoltaic arrangement, is suitably orientated and positioned with respect to the direct sunlight coming from the sun at all times of the day. Even, with suitable orientation, conventional systems are not generating optimum energy in the photovoltaic modules arranged in portrait manner.
  • the present invention discloses a system and method for increasing field power gain in photovoltaic modules, where at least four photovoltaic modules are stacked in a portrait manner.
  • a photovoltaic array formed with vertically stacked photovoltaic modules is inclined in a specific manner such that the upper photovoltaic modules of the photovoltaic array are placed at a relatively higher height from ground surface than the lower photovoltaic modules of the photovoltaic array.
  • Four to ten photovoltaic modules are stacked in the photovoltaic array of a solar power system.
  • the upper photovoltaic modules and lower photovoltaic modules generate a non-uniform output during peak hours. Each upper module of the photovoltaic array generates a higher output than its preceding module in the photovoltaic array.
  • FIG. 2 depicts an arrangement of photovoltaic modules forming a photovoltaic array in a portrait manner.
  • FIG. 3 depicts an exemplary side-view of the photovoltaic array and illustrates the varying height at which each individual photovoltaic module is located with reference to ground surface on which the photovoltaic array is mounted.
  • FIG. 4 depicts a flowchart elaborating a method of generating power in the photovoltaic modules of the solar power system.
  • Fig. 4 depicts a flowchart elaborating a method of generating power in the photovoltaic modules of the solar power system.
  • FIG. 1 depicts a diagram showing output from different photovoltaic modules during peak and off-peak hours.
  • the embodiments herein below provide a method of optimizing production of electrical energy from photovoltaic modules by arranging the photovoltaic modules in a particular manner conducive for higher energy generation.
  • photovoltaic cells are connected together electrically to form a photovoltaic module.
  • the photovoltaic module is formed by arrangement of photovoltaic cells, multiple photovoltaic modules are connected together to create a photovoltaic panel.
  • a systematic arrangement of photovoltaic panels is called a photovoltaic array in a solar power system.
  • the present invention discloses a method for enhancing generation of electrical energy in a solar power system.
  • the angle of inclination of the photovoltaic array with reference to a ground surface tends to have an effect on overall generation of electrical energy.
  • Inclining the photovoltaic array at a specific angle during peak hours allows for an absorption of additional solar energy by the upper photovoltaic modules in comparison with the lower photovoltaic modules (preceding photovoltaic modules) of the photovoltaic array.
  • the ground surface is any surface on which the photovoltaic array is mounted.
  • the photovoltaic (PV) array may refer to a set of photovoltaic modules stacked in a portrait manner.
  • peak hours may refer to hours between 11 a.m. to 1 p.m.
  • stacking may refer to an arrangement of photovoltaic modules in a photovoltaic array.
  • inclination may refer to a particular manner or angle in which the photovoltaic array is inclined with reference to ground or a mounting surface.
  • energy may refer to an electrical energy output generated by photovoltaic modules.
  • Fig. 1 depicts an arrangement of photovoltaic modules 100 forming a photovoltaic array in a portrait manner.
  • the photovoltaic modules 101 are stacked together in a portrait manner, which is contradictory to traditional practice of stacking photovoltaic modules 101 in a landscape manner.
  • the photovoltaic array 102 may comprise as few as four and as many as ten photovoltaic modules 101 stacked in portrait manner.
  • photovoltaic modules 101 are stacked and connected electrically (not shown in the figure) to form a photovoltaic array 102 in a solar power system.
  • the connections are through wires which are made from one or more conducting materials like copper, aluminium, and the like.
  • the wires are either solid or stranded and are covered in insulation for protection from external factors like heat, moisture, etc.
  • Fig. 2 represents an exemplary side view 200 of an individual photovoltaic array 102 in a solar power system.
  • the photovoltaic array 102 is inclined at a specific angle (not shown in the figure).
  • the angle of incidence is an important and a critical factor that impacts the performance of the photovoltaic modules 101 in the solar power system.
  • a photovoltaic cell is essentially an electrical device that converts the incident light energy into electrical energy at the atomic level i.e., the photovoltaic cell absorbs photons of light and releases electrons (free electrons) from the surface over which the light is incident. Capturing of free electrons results in the production of electrical charge.
  • a thin semiconductor wafer comprises an electric field, positive on one side and negative on the other side.
  • the photovoltaic cell functions as a closed circuit.
  • electrons are released from the semiconductor wafer, the electrons are captured within the circuit, thus resulting in generation of electrical charge in the circuit.
  • Adaptive photovoltaic cells are capable of changing absorption characteristics based on the environmental conditions around the photovoltaic cells and respond to the intensity of the light and the incident angle of the light around the photovoltaic cells.
  • the photovoltaic modules 101 stacked at the top-most part of the photovoltaic array 102 tend to absorb more incident light energy during peak hours of sunlight, in comparison with the preceding photovoltaic modules 101 stacked at the bottom-most part of the photovoltaic array 102.
  • the photovoltaic modules 101 stacked at the top-most part of the photovoltaic array 102 produce considerably more electrical energy in comparison with the preceding photovoltaic modules 101 stacked at the bottom-most part of the photovoltaic array 102.
  • each of the photovoltaic modules 101 owing to the inclination of the photovoltaic array 102, each of the photovoltaic modules 101 generate approximately 2% to 5% more electrical energy than the preceding photovoltaic modules 101 stacked at the bottom-most part of the photovoltaic array 102.
  • the photovoltaic modules 101 stacked at the top-most part of the photovoltaic array 102 produce about 2% to 5% more energy than the preceding photovoltaic modules 101 located just below the top most part (i.e., second row from top) and so on.
  • the photovoltaic modules 101 stacked at the top-most part of the photovoltaic array 102 may be referred to as upper photovoltaic modules 101, while the photovoltaic modules stacked at the lower part of the photovoltaic array 102 may be referred to as lower photovoltaic modules.
  • an angle of inclination of the upper photovoltaic modules may be different from an angle of inclination of the lower photovoltaic module.
  • the angle of incidence of sun rays upon the upper photovoltaic modules is different from the angle of inclination of the lower photovoltaic module.
  • different angles of inclination and incidence may result in differences in the energy generated by the upper photovoltaic module and the lower photovoltaic module.
  • the topmost module of the photovoltaic module 101 is located at height “h”.
  • the preceding modules of the photovoltaic module 101 are stacked at comparatively lesser heights “h-x” and “h-2x” as illustrated in fig. 2.
  • the peak hours of sunlight i.e., on an average, from 11 a.m. to 1 p.m. prove to be very conducive for generation of electrical energy at optimum levels.
  • all the modules of the photovoltaic modules 101 in the photovoltaic array 102 of the solar power system produce same amount of electrical energy.
  • Fig. 3 depicts a flowchart 300 illustrating a method for enhancing generation of electrical energy in a solar power system.
  • rays from the sun i.e., the light energy falls directly on the inclined photovoltaic array 102.
  • the photovoltaic array 102 is inclined at an angle to increase the absorption of the light energy in the top-most photovoltaic module 101 during the peak hours of sunlight.
  • the specific angle of inclination results in generation of 2% to 5% more energy by the top-most photovoltaic modules 101 in comparison with the preceding photovoltaic modules 101.
  • all the photovoltaic modules 101 in the photovoltaic array 102 produce same amount of electrical energy during off-peak hours.
  • Fig. 4 depicts a pictorial representation 400 illustrating output from different photovoltaic modules 101 at peak hours 401 and off-peak hours 402.
  • Each upper photovoltaic module 101 stacked at top-most region of the PV array 102 generates 2% to 5% more energy 403 during peak hours 401 of solar irradiance in comparison with the energy 404 produced by preceding photovoltaic modules 101 stacked at the bottom most region of the PV array 102.
  • Energy generated by the upper photovoltaic module 101 stacked at top-most region of the PV array 102 during peak hours, is higher in comparison with the preceding photovoltaic modules 101 stacked at the bottom most region of the PV array 102.
  • the stacking of PV modules 101 in portrait orientation results in generation of 2% to 5% higher energy in comparison with the conventional approach of stacking PV modules 101 in landscape orientation.
  • the present invention has resulted in increased field power gain for photovoltaic modules 101 during peak hours.
  • uniform output 405 is generated by each photovoltaic module 101 of the photovoltaic array 102 during off-peak hours 402 of solar irradiance.

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  • Photovoltaic Devices (AREA)

Abstract

L'invention concerne un système et un procédé (300) pour augmenter le gain de puissance de champ dans un système d'énergie solaire en agençant des modules photovoltaïques (101) dans un réseau photovoltaïque (102) pour former un système d'énergie solaire. Le réseau photovoltaïque (102) incliné vers la surface du sol amène des modules photovoltaïques (101) supérieurs du réseau photovoltaïque (102) à une hauteur plus élevée que des modules photovoltaïques (101) précédents dans le réseau photovoltaïque (102). L'inclinaison amène chaque module photovoltaïque (101) dans le réseau photovoltaïque (102) à générer de 2 % à 5 % d'énergie relativement en plus que les modules photovoltaïques (101) précédents dans le réseau photovoltaïque (102) pendant la période de pointe. La valeur d'énergie générée par chaque module photovoltaïque (101) reste la même d'un bout à l'autre du réseau photovoltaïque (102) pendant les heures creuses.
PCT/IN2019/050303 2018-04-14 2019-04-13 Système et procédé d'augmentation de gain de puissance de champ dans des modules photovoltaïques WO2019198108A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN201841014309 2018-04-14
IN201841014309 2018-04-14

Publications (1)

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WO2019198108A1 true WO2019198108A1 (fr) 2019-10-17

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8511008B2 (en) * 2008-08-29 2013-08-20 Sharp Kabushiki Kaisha Solar cell module attachment structure and solar cell apparatus
US20140216531A1 (en) * 2011-09-22 2014-08-07 Magna International Inc. Solar Panel Assembly

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8511008B2 (en) * 2008-08-29 2013-08-20 Sharp Kabushiki Kaisha Solar cell module attachment structure and solar cell apparatus
US20140216531A1 (en) * 2011-09-22 2014-08-07 Magna International Inc. Solar Panel Assembly

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CATALOGUE FOR GROUND MOUNT SOLAR MOUNTING SYSTEMS, 30 September 2015 (2015-09-30) *

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