CN214228198U - Photovoltaic system - Google Patents

Photovoltaic system Download PDF

Info

Publication number
CN214228198U
CN214228198U CN202120132308.7U CN202120132308U CN214228198U CN 214228198 U CN214228198 U CN 214228198U CN 202120132308 U CN202120132308 U CN 202120132308U CN 214228198 U CN214228198 U CN 214228198U
Authority
CN
China
Prior art keywords
photovoltaic
photovoltaic module
photovoltaic cell
module
series
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
CN202120132308.7U
Other languages
Chinese (zh)
Inventor
胡湘威
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to CN202120132308.7U priority Critical patent/CN214228198U/en
Application granted granted Critical
Publication of CN214228198U publication Critical patent/CN214228198U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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

Landscapes

  • Photovoltaic Devices (AREA)

Abstract

The utility model discloses a photovoltaic system, including photovoltaic array and inverter, photovoltaic array includes a plurality of photovoltaic module cluster of parallel connection, every photovoltaic module cluster includes a plurality of photovoltaic module units of series connection, every photovoltaic module unit includes one or more photovoltaic module, photovoltaic module includes a plurality of photovoltaic cell parallel group of series connection, every photovoltaic cell parallel group includes a plurality of photovoltaic cell cluster of parallel connection, every photovoltaic cell cluster includes a plurality of photovoltaic cell pieces of series connection, the width scope of photovoltaic cell piece is 2.1 centimetre ~ 21.1 centimetre, the length scope of photovoltaic cell piece is 2.2 centimetre ~ 25 centimetres; the photovoltaic module does not contain any bypass diodes. The utility model discloses simple structure, reasonable in design realizes conveniently and with low costs, can effectively use in photovoltaic power generation, when guaranteeing photovoltaic power generation efficiency, has practiced thrift the cost, excellent in use effect, convenient to popularize and use.

Description

Photovoltaic system
Technical Field
The utility model belongs to the technical field of photovoltaic power generation, concretely relates to photovoltaic system.
Background
Currently, with the serious challenges of global warming and air pollution problems, countries around the world are increasingly paying more attention to the research of clean renewable energy sources. Solar energy is used as a green renewable energy source, and the crystalline silicon photovoltaic module is applied on a large scale.
When a certain photovoltaic cell in the photovoltaic module is damaged or partially shaded for a long time, the internal resistance of the damaged or shaded photovoltaic cell is increased, the power generation efficiency is reduced, and even the photovoltaic module is damaged due to the hot spot effect caused by local overheating. In the prior art, in order to reduce the negative effect of the hot spot effect, a bypass diode is usually added in a junction box of a photovoltaic module and connected between a positive lead and a negative lead of a photovoltaic cell component to reduce the harm of the hot spot effect. Moreover, until now, in the design of photovoltaic modules, people mostly add bypass diodes by default, and whether the actual effect brought by the bypass diodes is really effective and the economic cost brought by the bypass diodes are never considered.
When the photovoltaic module is subjected to quality problems during product manufacturing, severe bumping and collision during midway transportation, or relatively strong impact during construction, and the like, a local cell string inside the photovoltaic module is interrupted or broken, and although the probability of occurrence is extremely low, a bypass diode in the photovoltaic module is conducted when the situation occurs. The bypass diode is conducted, so that the component does not stop working, but continuously works to generate power, and only one section of the battery string cannot generate power. That is, the component is ill-worked due to the presence of the bypass diode until it is replaced by a maintenance person. Since the component string is not interrupted, the time for the background maintenance personnel to discover the faulty component is greatly delayed.
When the problem of hidden cracks exists at the local part of the photovoltaic module due to the quality problem during manufacturing or the local part of the photovoltaic module is shielded by (such as bird droppings and the like) for a long time, the internal resistance of the photovoltaic cell at the hidden cracks or the shielded part for a long time is increased, and then local heating is generated, the internal resistance is further increased by the local heating, so that rapid vicious circle is caused, and finally the cell is burnt or the whole photovoltaic module is burnt. When the internal resistance is increased due to serious hot spots of a certain battery string and the voltage at two ends of the battery string is reduced to a negative value, the bypass diode is conducted. After the bypass diode is conducted, the voltage at two ends of the battery string or the battery string connected with the battery string in parallel is recovered to 2-15V, and then the bypass diode is in a non-conducting state immediately. Therefore, the conduction of the bypass diode is in a continuously bouncing state, i.e., in an unstable state in which the conduction and the non-conduction are continuously bouncing. And because the parallel connection condition exists among the battery strings, when a certain battery string has hot spots, the internal resistance of the battery string rises, the voltage at two ends of the battery string falls, and at the moment, the battery string connected in parallel with the battery string can shunt a lot of current for the battery string with the hot spots, so that the voltage reduction range at two ends of the battery string is not large, and the bypass diode is not easy to be conducted. That is, the bypass diode has a very low probability of conducting, and even if it is conducting, the time in the conducting state is short. Through experimental verification, the actual effective utilization rate of the bypass diode is not high. The cost of bypass diodes is also prohibitive for large photovoltaic systems, with manufacturing costs of diodes and junction boxes in new photovoltaic modules of up to 10 to 20 billion RMB per year, calculated as 100GW installed per year. In addition, through data statistics in the past, for a photovoltaic system, only one photovoltaic module in more than ten thousand photovoltaic modules can generate a hot spot effect and use a bypass diode within the service life of one year, that is, the utilization rate of the bypass diode is extremely low, and compared with the cost of the bypass diode, the value generated by the existence of the bypass diode is far less than the increase of the cost caused by the bypass diode.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that not enough among the above-mentioned prior art is directed at, provide a photovoltaic system, its simple structure, reasonable in design realizes conveniently and with low costs, can effectively use in photovoltaic power generation, when guaranteeing photovoltaic power generation efficiency, has practiced thrift the cost, excellent in use effect, convenient to popularize and use.
In order to solve the technical problem, the utility model discloses a technical scheme is: a photovoltaic system comprises a photovoltaic array and an inverter, wherein the output end of the photovoltaic array is connected with the direct current end of the inverter, the photovoltaic array comprises a plurality of photovoltaic module strings which are connected in parallel, each photovoltaic module string comprises a plurality of photovoltaic module units which are connected in series, each photovoltaic module unit comprises one or more photovoltaic modules, each photovoltaic module comprises a plurality of photovoltaic cells which are connected in series and are connected in parallel, each photovoltaic cell parallel group comprises a plurality of photovoltaic cell strings which are connected in parallel, each photovoltaic cell string comprises a plurality of photovoltaic cell sheets which are connected in series, the width range of each photovoltaic cell sheet is 2.1 cm-21.1 cm, and the length range of each photovoltaic cell sheet is 2.2 cm-25 cm; the width range of a photovoltaic module formed by connecting a plurality of photovoltaic cells in parallel in series is 0.95-2.6 m, and the length range of the photovoltaic module formed by connecting the plurality of photovoltaic cells in parallel in series is 1.5-4.6 m; the photovoltaic module does not contain any bypass diodes.
In the photovoltaic system, the dc end of the inverter is connected to the combiner box, and the output end of the photovoltaic array is connected to the dc end of the inverter through the combiner box.
In the photovoltaic system, the inverter or the combiner box comprises the MPPT controller.
When the photovoltaic module unit comprises a plurality of photovoltaic modules, the photovoltaic modules are connected in parallel.
When the photovoltaic module unit comprises one photovoltaic module, the number of the photovoltaic module units connected in series in the photovoltaic module string is greater than or equal to 10; when the photovoltaic module unit comprises a plurality of photovoltaic modules, the number of the photovoltaic module units connected in series in the photovoltaic module string is more than or equal to 5.
In the photovoltaic system, the raw material of the photovoltaic cell is a monocrystalline silicon wafer or a polycrystalline silicon wafer.
The photovoltaic system is characterized in that the photovoltaic module does not contain any power management integrated circuit inside, and the photovoltaic module is locally not connected with any power management integrated circuit outside.
Compared with the prior art, the utility model has the following advantage:
1. the utility model discloses simple structure, reasonable in design realizes conveniently and with low costs.
2. The utility model discloses a photovoltaic module, when generating heat or the hot spot produces and leads to a certain photovoltaic cell cluster both ends voltage reduction, can shunt the electric current of this photovoltaic cell cluster with other photovoltaic cell clusters of this photovoltaic cell cluster parallelly connected for this photovoltaic module can not need the participation of bypass diode and can guarantee simultaneously that there is the local latent branch and shelter from the formation of generating heat or the hot spot for a long time can not cause the continuation of generating heat and hot spot to worsen, has slowed down the continuation of generating heat and hot spot and has worsened.
3. The utility model discloses a photovoltaic system, the cracked phenomenon of circuit of a certain photovoltaic cell cluster appears in photovoltaic module, and the photovoltaic module of no bypass diode can lead to the circuit interruption of this photovoltaic module cluster, and the information of this interruption can convey to maintaining backstage system at once through the collection flow box, and maintainer can in time change this photovoltaic module, keeps the healthy degree in power station, does not let photovoltaic module "take the trouble to continue work".
4. The utility model discloses under the condition that does not use the bypass diode, still can maintain the effect that former bypass diode played to save the quantity of bypass diode, practiced thrift the cost.
5. The utility model discloses can effectively use in photovoltaic power generation, when guaranteeing photovoltaic power generation efficiency, practice thrift the cost, excellent in use effect, convenient to popularize and use.
To sum up, the utility model discloses simple structure, reasonable in design realizes conveniently and with low costs, can effectively use in photovoltaic power generation, when guaranteeing photovoltaic power generation efficiency, has practiced thrift the cost, excellent in use effect, convenient to popularize and use.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic view of a photovoltaic system according to embodiment 1 of the present invention;
fig. 2 is a schematic view of a photovoltaic module according to embodiment 1 of the present invention;
fig. 3 is a schematic view of a photovoltaic system according to embodiment 2 of the present invention;
fig. 4 is a schematic view of a photovoltaic module according to embodiment 2 of the present invention;
FIG. 5 is a schematic view of a photovoltaic module including a bypass diode when no photovoltaic cell is blocked;
FIG. 6 is a schematic diagram of a photovoltaic module with a bypass diode when a single photovoltaic cell is blocked for a long time;
FIG. 7 is a schematic diagram of a photovoltaic module with bypass diodes when a plurality of vertical photovoltaic cells are blocked for a short period of time;
fig. 8 is a schematic diagram of a photovoltaic module with bypass diodes when a plurality of photovoltaic cells are blocked for a short period of time.
Description of reference numerals:
1-a photovoltaic module; 10, parallel connection of photovoltaic cells; 110-a string of photovoltaic cells;
120-photovoltaic cell slice; 2-a photovoltaic array; 20-a string of photovoltaic modules;
210-a photovoltaic module unit; 3-an inverter; 4-a combiner box.
Detailed Description
Example 1
As shown in fig. 1 to 2, the photovoltaic system of the present embodiment includes a photovoltaic array 2 and an inverter 3, an output end of the photovoltaic array 2 is connected to a dc end of the inverter 3, the photovoltaic array 2 includes four photovoltaic module strings 20 connected in parallel, each photovoltaic module string 20 includes twenty photovoltaic module units 210 connected in series, each photovoltaic module unit 210 includes one photovoltaic module 1, the photovoltaic module 1 includes three photovoltaic cells connected in series and a parallel group 10, each photovoltaic cell parallel group 10 includes two photovoltaic cell strings 110 connected in parallel, each photovoltaic cell string 110 includes twenty-four photovoltaic cell sheets 120 connected in series, a width of each photovoltaic cell sheet 120 is in a range of 2.1 cm to 21.1 cm, and a length of each photovoltaic cell sheet 120 is in a range of 2.2 cm to 25 cm; the width range of a photovoltaic module 1 formed by connecting three photovoltaic cell parallel groups 10 in series is 0.95-2.6 m, and the length range of the photovoltaic module 1 formed by connecting three photovoltaic cell parallel groups 10 in series is 1.5-4.6 m; the photovoltaic module 1 does not contain any bypass diodes.
In this embodiment, the inverter 3 is provided with an MPPT controller, and the inverter 3 functions to convert the direct current generated by the photovoltaic array 2 into alternating current for practical use. The MPPT (Maximum power point Tracking) controller can detect the generated voltage of the photovoltaic system in real time, and track the Maximum voltage and current value, so that the photovoltaic system outputs at the Maximum power.
In this embodiment, the raw material of the photovoltaic cell 120 is a monocrystalline silicon wafer or a polycrystalline silicon wafer.
In this embodiment, the photovoltaic module 1 does not include any power management integrated circuit therein, and the photovoltaic module 1 is not connected to any power management integrated circuit locally and externally.
Example 2
As shown in fig. 3 to 4, the photovoltaic system of the present embodiment includes a photovoltaic array 2 and an inverter 3, a junction box 4 is connected to a dc end of the inverter 3, an output end of the photovoltaic array 2 is connected to the dc end of the inverter 3 through the junction box 4, the photovoltaic array 2 includes four photovoltaic module strings 20 connected in parallel, each photovoltaic module string 20 includes ten photovoltaic module units 210 connected in series, each photovoltaic module unit 210 includes two photovoltaic modules 1 connected in parallel, the two photovoltaic modules 1 are connected in parallel, the photovoltaic module 1 includes two photovoltaic cells connected in series and a parallel group 10, each photovoltaic cell parallel group 10 includes six photovoltaic cell strings 110 connected in parallel, each photovoltaic cell string 110 includes twelve photovoltaic cell pieces 120 connected in series, a width range of the photovoltaic cell piece 120 is 2.1 cm to 21.1 cm, and a length range of the photovoltaic cell piece 120 is 2.2 cm to 25 cm; the width range of a photovoltaic module 1 formed by connecting three photovoltaic cell parallel groups 10 in series is 0.95-2.6 m, and the length range of the photovoltaic module 1 formed by connecting three photovoltaic cell parallel groups 10 in series is 1.5-4.6 m; the photovoltaic module 1 does not contain any bypass diodes.
In this embodiment, the MPPT controller is provided in the combiner box 4, and the combiner box 4 is used to reduce the number of connections between the photovoltaic array 2 and the inverter 3, and in the case of a small number of connections, the photovoltaic array 2 may be directly connected to the inverter 3 without using the combiner box 4.
In this embodiment, the raw material of the photovoltaic cell 120 is a monocrystalline silicon wafer or a polycrystalline silicon wafer.
In this embodiment, the photovoltaic module 1 does not include any power management integrated circuit therein, and the photovoltaic module 1 is not connected to any power management integrated circuit locally and externally.
It should be noted that, for the photovoltaic module 1, besides the internal circuit structure formed by the photovoltaic cells 120, other structures such as a back plate and a glass panel are also provided, and this exemplary embodiment is not described again. In practical application, the number of the specific parallel groups 10 of the photovoltaic cells, the number of the photovoltaic cell strings 110 and the number of the photovoltaic cell sheets 120 in the photovoltaic module 1 can be adjusted according to practical situations; the number of the photovoltaic module units 210 connected in series in the photovoltaic module string 20 may also be adjusted according to actual conditions, and the exemplary embodiment of the present disclosure is not limited thereto.
The bypass diode is used in the photovoltaic module formed by connecting the photovoltaic cells in series, so that when the hot spot effect is generated and the power cannot be generated, the bypass diode plays a role in bypassing current generated by other photovoltaic cells and enables the current to flow out of the bypass diode, and the photovoltaic system can continue to generate power. The utility model discloses a do not contain any bypass diode among the photovoltaic module, because the utility model discloses a photovoltaic module has contained the photovoltaic cell parallel group that becomes by a plurality of photovoltaic cell piece series-parallel, even produce the hot spot effect when a certain photovoltaic cell piece and lead to can not generating electricity, can not cause the influence to the outflow of the electric current that other photovoltaic cell pieces produced yet, can also prevent simultaneously to generate heat and the continuation of hot spot worsen. The working mechanism is that when voltage at two ends of a certain photovoltaic cell string is reduced due to heating or hot spots, the current of the photovoltaic cell string can be shunted by other photovoltaic cell strings connected with the photovoltaic cell string in parallel, so that the photovoltaic module can avoid participation of a bypass diode and can simultaneously ensure that the heating and the hot spots cannot be continuously deteriorated when the heating or the hot spots are formed by local subfissure and local long-term shielding, the continuous deterioration of the heating and the hot spots is slowed down, and the same effect can be achieved without participation of the bypass diode.
In addition, due to the existence of the bypass diode, when a certain photovoltaic cell piece has a hot spot effect, other photovoltaic cell pieces can normally continue to work, so that faults are not easy to find in time and the sick photovoltaic cell piece is quickly replaced, and the working efficiency of the photovoltaic module is reduced. The utility model discloses an among the photovoltaic system, during the cracked phenomenon of circuit of a certain photovoltaic cell cluster, the photovoltaic module of no bypass diode can lead to the circuit interruption of this photovoltaic module cluster, and the information that should break off can convey to maintaining backstage system at once through dc-to-ac converter or collection flow box, and maintainer can in time change this photovoltaic module, keeps the holistic health degree in power station, does not let photovoltaic module "take the trouble to continue work".
Moreover, a photovoltaic module is usually provided with a plurality of bypass diodes, and a photovoltaic system is usually provided with a huge number of photovoltaic modules, and particularly for a large photovoltaic system, the cost of the bypass diodes is also staggering; moreover, for a photovoltaic system, in the service life of a year, the hot spot effect of more than 1 photovoltaic module in ten thousand photovoltaic modules can occur, and the bypass diode is used, that is, the utilization rate of the bypass diode is extremely low, and the existence of the bypass diode is unnecessary relative to the cost of the bypass diode.
The utility model discloses a photovoltaic system without any bypass diode, which can prevent the hot spot from continuously deteriorating, and avoid the condition that the photovoltaic module is in trouble due to quick replacement because the fault can not be found in time; meanwhile, the cost of the photovoltaic system is reduced, and the effect of saving resources is achieved.
In order to verify the technical effect of the utility model discloses the photovoltaic system that does not contain any bypass diode and the photovoltaic system every day that contains the bypass diode are counted, and the statistical result is shown as table 1.
Table 1 statistical results of generated energy
Figure BDA0002903971760000081
Figure BDA0002903971760000091
As can be seen from table 1, the power generation of the photovoltaic system without any bypass diode and the photovoltaic system with the bypass diode are substantially the same within the same day (the slight difference in power generation of different module strings within the same day is caused by the difference in initial accurate power of the modules, and the difference in power generation within different days is caused by the change in weather and radiation intensity). That is, the power generation amount is normal in the case of the photovoltaic system without any bypass diode and the existing photovoltaic system with the bypass diode under the same structure. Therefore, the photovoltaic system without any bypass diode and the photovoltaic system with the bypass diode have the same function in the actual use process, and the power generation capacity of the photovoltaic system is not influenced under the condition of no bypass diode.
In addition, shelter from the experiment through the photovoltaic module that contains bypass diode and the photovoltaic module that does not contain any bypass diode, further verify the utility model discloses the technological effect of scheme.
When no photovoltaic cell is shielded in the photovoltaic module containing the bypass diode, as shown in fig. 5, under the STC test condition, the series internal resistance R of a single photovoltaic cell of the photovoltaic module isS03.258m omega, the working output current of the photovoltaic module is 10A, and the working current i of the photovoltaic cell string a1And the operating current i of the photovoltaic cell string d2All 5A, terminal voltage U of photovoltaic cell string a1And terminal voltage U of photovoltaic cell string d2Are all 14V.
When a single photovoltaic cell in the photovoltaic module containing the bypass diode is shielded for a long time, as shown in fig. 6, under the STC test condition, the series internal resistance R of the shielded photovoltaic cellS1325.8m omega, the working output current of the photovoltaic component is still 10A because the shielding area is very small, and the working current of the photovoltaic cell string d subjected to local shielding is i4Is partially covered byTerminal voltage U of blocked photovoltaic cell string d4＝14-i4×RS1+(5-i4)×RSX 24, operating current i of photovoltaic cell string a3＝10-i4Terminal voltage U of photovoltaic cell string a3＝14-(5-i4)×RSX 24, due to U3＝U4Calculating to obtain i4＝1.62A，i3＝8.38A，U3＝U413.7297V. Therefore, the bypass diode is hard to conduct.
When a plurality of photovoltaic cells in the photovoltaic module containing the bypass diode are shielded for a short time, as shown in fig. 7, the photovoltaic cells in half of the photovoltaic cell string a and the photovoltaic cells in half of the photovoltaic cell string d are shielded for a short time (typically, the north hemisphere is 10 months to 3 months of the coming year in the morning for 1 hour and 2 hours in the afternoon), and the light radiation intensity is one third of the light radiation intensity under the STC test condition, the series internal resistance R of a single photovoltaic cell isS24.0418m omega, the series internal resistance R of the shielded photovoltaic cellS3404.18m omega, the working output current of the photovoltaic module is 3.33A, and the working current of the photovoltaic cell string d subjected to partial shielding is i6Terminal voltage U of photovoltaic cell string d shielded locally6＝14-i6×RS3X 22 is 6V, and the working current i of the photovoltaic cell string a is partially shielded5＝i6The bypass diode does not conduct as 1.67A.
When a plurality of transverse photovoltaic cells in the photovoltaic module with the bypass diode are shielded for a short time, as shown in fig. 8, two photovoltaic cells in the photovoltaic cell string d, two photovoltaic cells in the photovoltaic cell string e, and two photovoltaic cells in the photovoltaic cell string f are shielded for a short time (typically, the application scenarios are that the northern hemisphere is 10 months to 3 months of the coming year in the morning for 1 hour and 2 hours in the afternoon), and the light radiation intensity is one third of the light radiation intensity under the STC test condition, the series internal resistance R of a single photovoltaic cell isS24.0418m omega, the series internal resistance R of the shielded photovoltaic cellS3404.18m omega, the working output current of the photovoltaic module is 3.33A, and the working current of the photovoltaic cell string d subjected to partial shielding is i8To be subjected toTerminal voltage U of photovoltaic cell string d with local shielding8＝14-i8×RS3×2+(1.67-i8)×RS2X 24, operating current i of photovoltaic cell string a7＝3.33-i8Terminal voltage U of photovoltaic cell string a7＝14-(1.67-i8)×RS2X 24, due to U7＝U8Calculating to obtain i8＝0.3232A，i7＝3.0068A，U7＝U8The bypass diode will not conduct at 14.13V.
Through experimental tests, the actual effective utilization rate of the bypass diode in the prior art is not high; and the shielded area of the photovoltaic module in the photovoltaic system without any bypass diode does not generate hot spots.
The above, only be the utility model discloses a preferred embodiment, it is not right the utility model discloses do any restriction, all according to the utility model discloses the technical entity all still belongs to any simple modification, change and the equivalent structure change of doing above embodiment the utility model discloses technical scheme's within the scope of protection.

Claims (7)

1. A photovoltaic system comprising a photovoltaic array (2) and an inverter (3), the output of the photovoltaic array (2) being connected to the dc terminal of the inverter (3), characterized in that: the photovoltaic array (2) comprises a plurality of photovoltaic module strings (20) connected in parallel, each photovoltaic module string (20) comprises a plurality of photovoltaic module units (210) connected in series, each photovoltaic module unit (210) comprises one or more photovoltaic modules (1), each photovoltaic module (1) comprises a plurality of photovoltaic cell parallel groups (10) connected in series, each photovoltaic cell parallel group (10) comprises a plurality of photovoltaic cell strings (110) connected in parallel, each photovoltaic cell string (110) comprises a plurality of photovoltaic cell sheets (120) connected in series, the width of each photovoltaic cell sheet (120) ranges from 2.1 cm to 21.1 cm, and the length of each photovoltaic cell sheet (120) ranges from 2.2 cm to 25 cm; the width range of a photovoltaic module (1) formed by connecting a plurality of photovoltaic cell parallel groups (10) in series is 0.95-2.6 m, and the length range of the photovoltaic module (1) formed by connecting a plurality of photovoltaic cell parallel groups (10) in series is 1.5-4.6 m; the photovoltaic module (1) does not contain any bypass diodes.
2. A photovoltaic system in accordance with claim 1, wherein: the direct current end of inverter (3) is connected with collection flow box (4), the output of photovoltaic array (2) is connected with the direct current end of inverter (3) through collection flow box (4).
3. A photovoltaic system in accordance with claim 2, wherein: the inverter (3) or the combiner box (4) comprises an MPPT controller.
4. A photovoltaic system in accordance with claim 1, wherein: when the photovoltaic module unit (210) comprises a plurality of photovoltaic modules (1), the photovoltaic modules (1) are connected in parallel.
5. A photovoltaic system in accordance with claim 1, wherein: when the photovoltaic module unit (210) comprises one photovoltaic module (1), the number of the photovoltaic module units (210) connected in series in the photovoltaic module string (20) is more than or equal to 10; when the photovoltaic module unit (210) comprises a plurality of photovoltaic modules (1), the number of the photovoltaic module units (210) connected in series in the photovoltaic module string (20) is more than or equal to 5.
6. A photovoltaic system in accordance with claim 1, wherein: the raw material of the photovoltaic cell piece (120) is a monocrystalline silicon piece or a polycrystalline silicon piece.
7. A photovoltaic system in accordance with claim 1, wherein: the photovoltaic module (1) does not contain any power management integrated circuit inside, and the photovoltaic module (1) is locally not connected with any power management integrated circuit outside.
CN202120132308.7U 2021-01-18 2021-01-18 Photovoltaic system Active CN214228198U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202120132308.7U CN214228198U (en) 2021-01-18 2021-01-18 Photovoltaic system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202120132308.7U CN214228198U (en) 2021-01-18 2021-01-18 Photovoltaic system

Publications (1)

Publication Number Publication Date
CN214228198U true CN214228198U (en) 2021-09-17

Family

ID=77690103

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202120132308.7U Active CN214228198U (en) 2021-01-18 2021-01-18 Photovoltaic system

Country Status (1)

Country Link
CN (1) CN214228198U (en)

Similar Documents

Publication Publication Date Title
CN112768545A (en) Photovoltaic module, photovoltaic array and photovoltaic system
EP3637477B1 (en) Solar cell photovoltaic array
US7714224B2 (en) Photovoltaic power generation module and photovoltaic power generation system employing same
JP3226326U (en) Solar cells and solar panels
Vunnam et al. Performance analysis of mono crystalline, poly crystalline and thin film material based 6× 6 TCT PV array under different partial shading situations
CN110212051A (en) A kind of heat resistanceheat resistant spot veneer block photovoltaic module
CN108258077A (en) Half photovoltaic cell subassembly of full tandem type
CN109286355B (en) Photovoltaic module arrangement method in wind-solar hybrid power generation system
CN213636011U (en) Intelligent photovoltaic module
CN214228198U (en) Photovoltaic system
Jiang Investigation of solar energy for photovoltaic application in Singapore
Tamoor et al. Optimal sizing of a centralized hybrid photovoltaic system for efficient operation of street lights
Liu et al. The analysis and application of solar energy PV power
Patapoff et al. Utility interconnection experience with an operating central station MW-Sized photovoltaic plant
Sarannya et al. Performance Evaluation of 50 kW Solar PV Power Plant Installed in a Technical Institution
CN207834325U (en) Half photovoltaic cell subassembly of full tandem type
KR20200113877A (en) Photovoltaics System having direct current summing control in response to the variation in the output power of the solar panel
CN212486416U (en) Combined power generation system with photovoltaic modules in different directions
Yang et al. Solar Photovoltaic Power Generation
CN204303842U (en) A kind of photovoltaic module
US10658534B2 (en) Bi-facial photovoltaic power generation module
CN114759109A (en) Laminated solar module
CN210575973U (en) Photovoltaic module
CN212874509U (en) N-type single crystal double-sided double-glass photovoltaic assembly
CN219780104U (en) Converging box

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant