CN109150105B - Monitoring device of photovoltaic module - Google Patents
Monitoring device of photovoltaic module Download PDFInfo
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- CN109150105B CN109150105B CN201811076349.8A CN201811076349A CN109150105B CN 109150105 B CN109150105 B CN 109150105B CN 201811076349 A CN201811076349 A CN 201811076349A CN 109150105 B CN109150105 B CN 109150105B
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 9
- 238000012544 monitoring process Methods 0.000 claims abstract description 112
- 239000010409 thin film Substances 0.000 claims abstract description 10
- 238000004891 communication Methods 0.000 claims description 14
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- 238000005259 measurement Methods 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000010248 power generation Methods 0.000 description 4
- 239000011669 selenium Substances 0.000 description 4
- 230000006641 stabilisation Effects 0.000 description 4
- 238000011105 stabilization Methods 0.000 description 4
- 239000010949 copper Substances 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 2
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 229910052733 gallium Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052711 selenium Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000004148 unit process Methods 0.000 description 1
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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
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
- H02S50/10—Testing of PV devices, e.g. of PV modules or single PV cells
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- 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
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- Photovoltaic Devices (AREA)
Abstract
The invention discloses a monitoring device of a photovoltaic module. The device accessible tee junction connector links to each other with photovoltaic module for measure photovoltaic module's voltage, can detect ambient temperature and humidity as required simultaneously. The photovoltaic module string composed of a plurality of photovoltaic modules is connected with two adjacent photovoltaic modules through a three-way connector, wherein the first end of the three-way connector is connected with the anode of the first photovoltaic module, the second end of the three-way connector is connected with the cathode of the second photovoltaic module, the third end of the three-way connector is connected with the monitoring unit, potential information at the position is transmitted to the monitoring unit, and the ambient temperature and the ambient humidity of the modules are detected as required. The invention solves the technical problem of higher voltage measurement and monitoring cost of the CIGS thin film assembly in the prior art.
Description
Technical Field
The invention relates to the field of photovoltaics, in particular to a monitoring device for a photovoltaic module.
Background
The photovoltaic power generation system is a power generation system which directly converts light energy into electric energy without a thermal process, and the main components of the photovoltaic power generation system are a solar cell, a storage battery, a control unit and an inverter.
The CIGS (Cu, copper, Inin, Ga gallium and Se selenium) thin film component is a common photovoltaic component, mainly comprises Cu, Inin, Ga gallium and Se selenium, and has the advantages of strong light absorption capacity, good luminescence stability, high conversion rate, long daytime power generation time and the like.
In order to ensure the stable operation of the photovoltaic system, the operation state of the photovoltaic module is preferably monitored. At present, a photovoltaic system can only monitor component current, group string voltage, generated energy and the like. If the voltage of a single component is monitored, the voltage monitoring method needs to be realized by additionally arranging a separate device on each component, and the system is complicated in wiring and high in manufacturing cost.
Aiming at the problem of higher monitoring cost of a CIGS thin film component in the prior art, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides a monitoring device of a photovoltaic module, which aims to solve the technical problem that the cost for monitoring voltage of a CIGS thin film module in the prior art is high.
According to an aspect of an embodiment of the present invention, there is provided a monitoring apparatus for a photovoltaic module, including: tee junction ware, tee junction ware set up in the photovoltaic module cluster, between two adjacent photovoltaic module, wherein, tee junction ware's first end links to each other with first photovoltaic module's positive pole, and tee junction ware's second end links to each other with second photovoltaic module's negative pole, and tee junction ware passes through first end and second end and gathers initial monitoring data, and wherein, initial monitoring data includes: potential parameters of the positive electrode and the negative electrode of each photovoltaic module; the monitoring unit is connected with a third end of the three-way connector, and monitoring parameters are determined according to initial monitoring data uploaded by the three-way connector, wherein the monitoring parameters are used for monitoring the working state of the photovoltaic module monitored by the upper computer.
Furthermore, the monitoring unit also utilizes the electric potentials collected by the two three-way connectors connected to the same photovoltaic module to determine the voltage of the photovoltaic module.
Further, the above apparatus further comprises: and the temperature sensor is arranged at the position of the photovoltaic module back plate and used for collecting the back plate temperature of any one photovoltaic module.
Further, the above apparatus further comprises: and the humidity sensor is arranged at the position of the photovoltaic module back plate and used for collecting the back plate humidity of any one photovoltaic module.
Further, the monitoring unit further comprises: and the voltage stabilizing circuit is connected with the output ends of the two adjacent three-way connectors and is used for converting the potential difference of the output ends of the two three-way connectors into stable voltage to supply power for the monitoring unit.
Furthermore, the monitoring unit also comprises a communication module, and the monitoring unit is used for uploading the monitoring parameters to the monitoring upper computer through the communication module.
Further, the three-way connector has a MC4 type three-way fitting.
Further, the photovoltaic module is a CIGS thin film module.
In the embodiment of the invention, one group string is taken as one detection unit, the voltage of the component is detected in the device, and the voltage is transmitted to the monitoring host through the data line. Need not to install solitary check out test set additional on every photovoltaic module, reached the purpose that reduces monitoring cost. Therefore, the technical problem that the monitoring voltage cost of the CIGS thin film assembly in the prior art is high is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a schematic view of a monitoring device of a photovoltaic module according to embodiment 1 of the present invention;
FIG. 2 is a schematic view of a photovoltaic monitoring system according to an embodiment of the present application;
FIG. 3 is a schematic diagram of determining a monitored parameter according to an embodiment of the present application;
fig. 4 is a schematic diagram of a monitoring unit according to an embodiment of the present application.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
According to an embodiment of the present invention, there is provided an embodiment of a monitoring device for a photovoltaic module, fig. 1 is a schematic view of the monitoring device for a photovoltaic module according to embodiment 1 of the present invention, as shown in fig. 1, the system includes:
three way connection ware 20, three way connection ware setting are in photovoltaic module cluster 10, between two adjacent photovoltaic module, wherein, three way connection ware's first end links to each other with first photovoltaic module's positive pole, and three way connection ware's second end links to each other with second photovoltaic module's negative pole, and wherein, three way connection ware passes through first end and second end and gathers initial monitoring data, and wherein, initial monitoring data includes: and potential parameters of the positive electrode and the negative electrode of each photovoltaic module.
Specifically, the three-way connector has three ports, the first end and the second end include potential detection devices, in the above scheme, two of the ports of the three-way connector connect two adjacent photovoltaic modules in the string of photovoltaic modules, and the other port is used as the output of the two ports and is connected to the monitoring unit.
In an alternative embodiment, as shown in fig. 1, a plurality of photovoltaic modules 10 (only 3 are shown in the figure) are arranged laterally to form a photovoltaic module string, a first end 21 of the three-way connector 20 is connected to a negative electrode of a first photovoltaic module 10, a second end 22 of the three-way connector 20 is connected to a positive electrode of a second photovoltaic module 10, a third section 23 of the three-way connector 20 is connected to the monitoring unit 30, and the second three-way connector 20 connects the second photovoltaic module and the third photovoltaic module in the same connection manner.
The three-way connector is connected with the photovoltaic module string, and meanwhile, initial monitoring parameters of the photovoltaic module string need to be detected, initial monitoring data refer to values directly detected by the three-way connector, and according to the connection mode of the three-way connector and the photovoltaic modules, the positive electrode potential and the negative electrode potential of each photovoltaic module in the photovoltaic module string are different. Because the positive pole, the negative pole of every photovoltaic module all are connected with the port of tee junction connector, consequently detect the photovoltaic module cluster through tee junction connector, the electric potential of the positive pole and the negative pole of every photovoltaic module can both be detected.
And the monitoring unit 30 is connected with the third end of the three-way connector and used for determining monitoring parameters according to the initial monitoring data uploaded by the three-way connector, wherein the monitoring parameters are used for monitoring the working state of the photovoltaic module monitored by the upper computer.
Specifically, the third end of the three-way connector is an output end, the third ends of all the three-way connectors can be connected to a monitoring unit, and the monitoring unit determines monitoring parameters for monitoring the photovoltaic system by the upper computer according to potential parameters of the positive and negative electrodes of each photovoltaic assembly detected by the three-way connector.
In an optional embodiment, above-mentioned monitoring unit can install on photovoltaic module cluster backplate support, including communication module in the monitoring unit, for example, the GPRS module, and after the monitoring unit received initial monitoring data, can be monitoring parameter with initial monitoring data conversion to upload monitoring parameter to the monitoring host computer through communication module.
Fig. 2 is a schematic diagram of a photovoltaic monitoring system according to an embodiment of the present application, and in conjunction with fig. 2, for example, a CIGS thin film photovoltaic module is applied in a building, and according to the open circuit voltage (about 99.6V) of the module and the voltage input requirement (no higher than 1000V) on the dc side of the photovoltaic system, every 8 photovoltaic modules are arranged in series to form a photovoltaic string, and the other ends of the two photovoltaic modules at the edge are connected to a combiner box. The component detection device (namely the monitoring unit) is provided with a plurality of clamping grooves for being connected with the three-way connector and communicating with the monitoring upper computer through the RS485/MODBUS-RTU as a communication cable.
The collection flow box can measure data such as assembly current, group string voltage and square matrix current, also can transmit to the monitoring unit to by the above-mentioned monitoring unit to the monitoring host computer, calculate and the analysis by the monitoring host computer.
In the above embodiments of the present application, a group string is used as a detection unit, voltage detection of the module is implemented in the device, and the voltage is transmitted to the monitoring host through the data line. Independent detection equipment does not need to be additionally arranged on each photovoltaic module, the purpose of reducing the cost of monitoring voltage is achieved, and the technical problem that the cost of monitoring voltage of a CIGS thin film module in the prior art is high is solved.
As an optional embodiment, the monitoring unit is further configured to determine the voltage of the photovoltaic module according to a difference between a positive potential parameter and a negative potential parameter of each photovoltaic module, which are acquired by two three-way connectors connected to the same photovoltaic module.
As can be seen from fig. 1, in the scheme of the present application, the positive end and the negative end of one photovoltaic module are respectively connected to two three-way connectors, one three-way connector is connected to the positive electrode of the photovoltaic module, and the other three-way connector is connected to the negative electrode of the photovoltaic module, so that the potentials of the positive electrode and the negative electrode of the photovoltaic module can be determined through the detection values of the two three-way connectors. After the electric potentials of the positive electrode and the negative electrode of the photovoltaic module are determined, the electric potential difference of the positive electrode and the negative electrode is the voltage of the photovoltaic module.
Fig. 3 is a schematic diagram of determining monitoring parameters according to an embodiment of the present application, and in combination with fig. 3, the monitoring unit processes and calculates potentials at positive and negative ends of the photovoltaic module to obtain a voltage of each photovoltaic module, and then performs data conversion on the voltage through RS485 to transmit the voltage to the monitoring upper computer.
As an optional embodiment, the system further includes: and the temperature sensor is arranged at the position of the photovoltaic module back plate and used for collecting the back plate temperature of any one photovoltaic module.
In an alternative embodiment, the physical distance between the strings of photovoltaic modules is small, and is usually within a small geographic range, so that the difference in the back-sheet temperature of each photovoltaic module in the string of photovoltaic modules is small. To further reduce the cost of the monitoring system, only one temperature sensor may be provided in a string of photovoltaic modules.
In another optional embodiment, the temperature sensor may also be disposed at the component mounting location, and the monitoring unit is disposed on the photovoltaic module backplane, so that the temperature of the photovoltaic module backplane can be obtained.
As shown in fig. 3, the monitoring unit further performs data conversion and transmission on the temperature detected by the temperature sensor through RS484, and outputs the temperature to the monitoring upper computer.
As an optional embodiment, the system further includes: and the humidity sensor is arranged at the position of the photovoltaic module back plate and used for collecting the back plate humidity of any one photovoltaic module.
Specifically, above-mentioned humidity transducer is used for detecting photovoltaic module's humidity. As shown in fig. 3, the monitoring unit further performs data conversion and transmission on the humidity detected by the humidity sensor through RS484, and outputs the humidity to the monitoring upper computer.
As an optional embodiment, the system further includes: and the monitoring upper computer is connected with the monitoring unit and used for determining whether to send out alarm information according to the monitoring parameters.
Specifically, the monitoring upper computer can be arranged at a far end, acquires monitoring parameters of the photovoltaic module through communication with the monitoring unit, and monitors the running state of the photovoltaic module based on a preset monitoring strategy according to the monitoring parameters.
As an optional embodiment, the monitoring unit further includes: and the voltage stabilizing circuit is connected with the output ends of the two adjacent three-way connectors and is used for converting the potential difference of the output ends of the two three-way connectors into stable voltage to supply power for the monitoring unit.
Because the photovoltaic system operates, the voltage difference exists between any one of the photovoltaic modules, and therefore the voltage difference can be used for supplying power to the monitoring unit, the problems of complex wiring, high cost and the like caused by using an external power supply are solved.
When the photovoltaic system stops operating, no voltage difference exists between the positive electrode and the negative electrode of the photovoltaic module, but the monitoring unit does not need to operate at the moment, so that power supply for the monitoring unit is not needed.
Fig. 4 is a schematic diagram of a monitoring unit according to an embodiment of the present application, and with reference to fig. 4, the monitoring module, in addition to processing a card slot for accessing a three-way connector, an RS485 connection line, and a grounding device, further includes a voltage stabilization driving module (DC5V), where the voltage stabilization driving module is the above voltage stabilization voltage, and as the positive electrode and the negative electrode of one photovoltaic module access different three-way connectors, as shown in fig. 4, the input end of the voltage stabilization driving module accesses the output ends of two three-way connectors, so as to obtain a voltage difference between the positive electrode and the negative electrode of one photovoltaic module.
According to the embodiment of the application, the component potential difference of the input device is utilized, and the voltage output by the voltage stabilizing circuit is used as the working power supply of the device, so that the purpose of no need of an external power supply is achieved, the cost of a voltage monitoring system is reduced, and the external connection of the system is simplified.
As an optional embodiment, the monitoring unit further comprises a communication module, and the monitoring unit is used for uploading the monitoring parameters to the monitoring upper computer through the communication module.
In fig. 4, the monitoring unit communicates with an external monitoring upper computer through RS485, and in an optional embodiment, the monitoring unit can also communicate with the monitoring upper computer through a communication module, for example, a wireless communication module such as GPRS.
As an optional embodiment, the monitoring upper computer is further configured to send out warning information when the monitoring parameter meets any one of the following conditions: the detected temperature exceeds a predetermined temperature threshold; the detected voltage is not within a preset voltage range.
Specifically, the temperature is an important parameter for monitoring the photovoltaic system, and the temperature of the back plate of the photovoltaic module is monitored, so that the high-temperature photovoltaic module is prevented from generating fire. Thus, when the detected temperature exceeds a predetermined temperature threshold, an alarm message is issued. The voltage is used for monitoring the working state of the photovoltaic module, for example, whether the photovoltaic module has a fault or not, and therefore when the voltage is not within a preset voltage range, the photovoltaic module needs to be warned.
As an alternative embodiment, the three-way connector has a three-way fitting of the MC4 type.
As an alternative embodiment, the photovoltaic module is a CIGS thin film module.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. A photovoltaic module monitoring device, comprising:
three way connection ware, three way connection ware sets up in the photovoltaic module cluster, between two adjacent photovoltaic module, wherein, three way connection ware's first end links to each other with first photovoltaic module's positive pole, three way connection ware's second end links to each other with second photovoltaic module's negative pole, three way connection ware passes through first end with initial monitoring data is gathered to the second end, wherein, initial monitoring data includes: potential parameters of the positive electrode and the negative electrode of each photovoltaic module;
the monitoring unit is connected with the third end of the three-way connector and used for determining monitoring parameters according to initial monitoring data uploaded by the three-way connector and monitoring the running state of the photovoltaic string through the potential changes of the first end and the second end of the three-way connector, wherein the monitoring parameters are used for monitoring the working state of the photovoltaic module monitored by the upper computer;
the device further comprises:
the humidity sensor is arranged at the position of the photovoltaic module back plate and used for collecting the back plate humidity of any one photovoltaic module;
the monitoring unit further comprises:
and the voltage stabilizing circuit is connected with the output ends of the two adjacent three-way connectors and is used for converting the potential difference of the output ends of the two three-way connectors into stable voltage to supply power for the monitoring unit.
2. The device according to claim 1, wherein the monitoring unit is further configured to determine the voltage of the photovoltaic module according to a difference between a positive potential parameter and a negative potential parameter of each photovoltaic module collected by two three-way connectors connected to the same photovoltaic module.
3. The apparatus of claim 1, further comprising:
and the temperature sensor is arranged at the position of the photovoltaic module back plate and used for collecting the back plate temperature of any one photovoltaic module.
4. The device of claim 1, wherein the monitoring unit further comprises a communication module, and the monitoring unit is used for uploading the monitoring parameters to a monitoring upper computer through the communication module.
5. The device of claim 1, wherein the three-way connector has a MC4 style three-way fitting.
6. The device of claim 1, wherein the photovoltaic module is a CIGS thin film module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811076349.8A CN109150105B (en) | 2018-09-14 | 2018-09-14 | Monitoring device of photovoltaic module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811076349.8A CN109150105B (en) | 2018-09-14 | 2018-09-14 | Monitoring device of photovoltaic module |
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| CN109150105A CN109150105A (en) | 2019-01-04 |
| CN109150105B true CN109150105B (en) | 2020-07-17 |
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| CN202839967U (en) * | 2012-09-24 | 2013-03-27 | 宁波市创源光伏科技有限公司 | Three-way connector |
| CN106130477B (en) * | 2016-07-27 | 2018-07-24 | 国家电网公司 | A kind of solar energy photovoltaic panel monitoring device |
| CN107888147A (en) * | 2016-09-30 | 2018-04-06 | 阿特斯阳光电力集团有限公司 | Photovoltaic system |
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