CN217693256U - Photovoltaic panel fault monitoring system - Google Patents
Photovoltaic panel fault monitoring system Download PDFInfo
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- CN217693256U CN217693256U CN202220728554.3U CN202220728554U CN217693256U CN 217693256 U CN217693256 U CN 217693256U CN 202220728554 U CN202220728554 U CN 202220728554U CN 217693256 U CN217693256 U CN 217693256U
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- current sensor
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- 238000007142 ring opening reaction Methods 0.000 claims abstract description 16
- 238000004891 communication Methods 0.000 claims abstract description 15
- 238000010248 power generation Methods 0.000 abstract description 5
- 239000006185 dispersion Substances 0.000 description 17
- 238000004364 calculation method Methods 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006011 modification reaction Methods 0.000 description 2
- 230000002633 protecting Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 238000004642 transportation engineering Methods 0.000 description 1
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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
Abstract
The utility model discloses a photovoltaic board fault monitoring system, including a plurality of fuse-type isolator, a plurality of anti-reverse diode, a plurality of hall ring-opening current sensor, two circuit breakers, control module, communication module, power module and terminal, fuse-type isolator prevent reverse diode and hall ring-opening current sensor series connection in proper order, photovoltaic module is connected to fuse-type isolator's the other end, a plurality of hall ring-opening current sensor's the other end is connected through two busbar respectively the one end of two circuit breakers, the dc-to-ac converter is connected to the other end of circuit breaker, control module connects hall ring-opening current sensor reaches power module, control module passes through communication module connects the terminal. The embodiment of the utility model provides a fault location can be confirmed automatically, fast accurately, but wide application in photovoltaic power generation technical field.
Description
Technical Field
The utility model relates to a photovoltaic power generation technical field especially relates to a photovoltaic board fault monitoring system.
Background
In order to solve the increasingly severe energy shortage and environmental problems, the grid-connected photovoltaic power generation technology is rapidly developed. Photovoltaic systems are provided with moving parts and are relatively low in maintenance cost, but the photovoltaic systems are exposed to a complex outdoor environment for a long time and are influenced by various severe environmental factors, so that various faults can be caused. The faults not only cause power loss and influence the power generation efficiency, but also shorten the service life of the components, and even cause fire disasters due to local overheating in severe cases, thereby bringing immeasurable loss to photovoltaic power stations. The routine maintenance of the traditional photovoltaic system mainly depends on manual regular fault inspection, so that time and labor are wasted, and the labor cost is high.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a photovoltaic board fault monitoring system can confirm the fault location automatically, fast accurately.
The embodiment of the utility model provides a photovoltaic board fault monitoring system, including a plurality of fuse-type isolator, a plurality of prevent against diode, a plurality of hall ring-opening current sensor, two circuit breakers, control module, communication module, power module and terminal, fuse-type isolator prevent against diode and hall ring-opening current sensor series connection in proper order, photovoltaic module is connected to fuse-type isolator's the other end, a plurality of hall ring-opening current sensor's the other end is connected through two busbar respectively the one end of two circuit breakers, the dc-to-ac converter is connected to the other end of circuit breaker, control module connects hall ring-opening current sensor reaches power module, control module passes through communication module connects the terminal.
Optionally, the system further includes a lightning protection device, one end of the lightning protection device is connected to the circuit breaker, and the other end of the lightning protection device is grounded.
Optionally, the communication module includes any one of a wireless module or a bluetooth module.
Optionally, the system further comprises a storage module, and the storage module is connected to the control module through the communication module.
Optionally, the terminal includes any one or more of a cloud platform, a handheld terminal, or a wearable terminal.
Optionally, the system further comprises a camera, and the camera is connected with the control module.
Optionally, the system further comprises a robot connected to the control module.
Implement the embodiment of the utility model provides a include following beneficial effect: the embodiment of the utility model realizes the protection of the photovoltaic panel and the circuit through the fuse type isolating switch, the anti-reverse diode and the circuit breaker which are connected in series; the current of each photovoltaic panel branch is measured through the Hall open-loop current sensor, and the current dispersion rate and the fault position are determined through the control module according to the current of each photovoltaic panel branch, so that the fault position is automatically, quickly and accurately determined.
Drawings
Fig. 1 is a schematic structural diagram of a photovoltaic panel fault monitoring system provided by an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the embodiment of the utility model provides a photovoltaic board fault monitoring system, prevent reverse diode, a plurality of hall ring-opening current sensor, two circuit breakers, control module, communication module, power module and terminal including a plurality of fuse-type isolator, a plurality of, fuse-type isolator prevent reverse diode and hall ring-opening current sensor series connection in proper order, photovoltaic module is connected to fuse-type isolator's the other end, a plurality of hall ring-opening current sensor's the other end is connected through two busbar that converge respectively the one end of two circuit breakers, the dc-to-ac converter is connected to the other end of circuit breaker, control module connects hall ring-opening current sensor reaches power module, control module passes through communication module connects the terminal.
In fig. 1, #2, #3, #4, #5, and #6 are positive photovoltaic dc terminals, and #7, #8, #9, #10, #11, and #12 are negative photovoltaic dc terminals. The number of the photovoltaic direct-current positive terminals is the same as that of the photovoltaic direct-current negative terminals; after each photovoltaic direct-current positive end or each photovoltaic direct-current negative end passes through the fuse type isolating switch, the anti-reverse diode and the Hall open-loop current sensor, the photovoltaic direct-current positive end is connected with one of the circuit breakers through the bus bar, and the photovoltaic direct-current negative end is connected with the other circuit breaker through the bus bar. The other end of the breaker is connected with the inverter and the power grid.
As can be understood by those skilled in the art, the fuse-type disconnecting switch is a fuse combiner which combines a traditional fuse, an isolator and a switch into a whole, not only can be operated with load, but also has obvious current limiting characteristic and good selection characteristic, and can realize the optimal protection of a circuit.
It should be noted that the anti-reverse diode mainly prevents the occurrence of reverse current, and plays a role in protecting the photovoltaic panel.
As can be appreciated by those skilled in the art, the hall open loop current sensor is used for photovoltaic string current detection, which has the advantages that: the response time is fast, the precision is high, the volume is small, the anti-interference ability is strong, and the overload ability is strong;
it should be noted that the circuit breaker is an output control device of the photovoltaic panel, and is mainly used for opening/closing a line to protect the safety of the line.
The working principle of the photovoltaic panel fault monitoring system is as follows: the electric energy generated by the photovoltaic module is connected with the inverter after passing through the fuse type isolating switch, the anti-reverse diode, the Hall open-loop current sensor and the breaker, wherein the current collected by the Hall open-loop current sensor is sent to the control module, the control module calculates the current dispersion rate of the photovoltaic group string according to the received current and a preset calculation formula, determines the current abnormal value and the fault position according to the dispersion rate threshold value, sends the current abnormal value and the fault position to the terminal, displays the current abnormal value and the fault position on the terminal, and simultaneously sends a control instruction to the control module through the terminal, and sends a switching-on instruction and the like as follows.
It should be noted that the current collected by the hall open-loop current sensor is sent to the control module, the control module calculates the current dispersion rate of the photovoltaic string according to the current value and the existing calculation method, and determines the current abnormal value according to the dispersion rate threshold value, thereby determining the fault position.
The photovoltaic string current dispersion rate generally refers to the dispersion rate of the string current under a certain combiner box or an inverter of a photovoltaic power station. The smaller the numerical value of the dispersion rate is, the smaller the current difference between the photovoltaic string under the header box or the inverter is, the concentrated current curve is, the good performance of the photovoltaic string is, and the more stable the power generation condition is. If the numerical value of the dispersion rate is large, the current difference between the photovoltaic string under the combiner box or the inverter is large, the current curve is dispersed, and the problems of abnormality or faults of the photovoltaic string exist.
The calculation formula of the current discrete rate of the combiner box or the inverter group string is as follows:
CV group current j ＝σ/μ
In the formula, CV Group current j The current dispersion rate of a photovoltaic group string under a certain combiner box or an inverter at the moment j; j is the collection time point of the current of a certain combiner box or an inverter group; mu is the average value of the current of the lower group of a certain header box or an inverter at the moment j, and the calculation formula is as follows:
sigma is a standard deviation of the current of a lower group of a certain header box or an inverter at the moment j, and the calculation formula is as follows:
in the formula, x i And N is the total number of the photovoltaic string under a certain combiner box or an inverter.
The all-day average current dispersion rate of the photovoltaic string is a weighted average value of the dispersion rate of the current of the photovoltaic string under a certain combiner box or an inverter at each moment. The range of the discrete rate of the current of the inverter/combiner box group can be divided into 4 grades:
1) And if the value of the current dispersion rate of the combiner box or the inverter group string is within (0.5%), the branch current carried by the combiner box or the inverter operates stably.
2) And if the value of the group string current dispersion rate of the combiner box or the inverter is within (5% and 10%), the branch current running condition of the combiner box or the inverter is good.
3) And if the value of the group string current dispersion rate of the combiner box or the inverter is within (10% and 20%), indicating that the branch current operation condition carried by the combiner box or the inverter needs to be improved.
4) And if the current dispersion rate of the group strings of the combiner box or the inverter exceeds 20%, the operation condition of the branch current of the combiner box or the inverter is poor, the group strings have faults, and the group strings need to be rectified.
Optionally, the system further includes a lightning protection device, one end of the lightning protection device is connected to the circuit breaker, and the other end of the lightning protection device is grounded.
It will be appreciated by those skilled in the art that lightning strike protection is a concern since the fusible disconnect switch, the anti-reverse diode, and the hall open loop current sensor of the above system are all installed in an outdoor environment. Once a lightning strike occurs, the surge protector in the lightning protection device can rapidly discharge overlarge electric energy, so that the stable output of the electric energy is ensured, and the lightning protection device is protected from being damaged by the lightning strike.
Optionally, the communication module includes any one of a wireless module or a bluetooth module.
It should be noted that the communication module is a mature wireless module or a bluetooth module, and is easy to implement and has a good effect.
Optionally, the system further comprises a storage module, and the storage module is connected to the control module through the communication module.
Optionally, the terminal includes any one or more of a cloud platform, a handheld terminal, or a wearable terminal.
It should be noted that the cloud platform can implement data sharing, the handheld terminal includes a mobile phone, a tablet computer or a notebook computer, and the wearable terminal includes a smart watch.
The technical personnel in the field can understand that the photovoltaic cloud big data management system is accessed to collect, store and analyze the data of the cleaning history, and a photovoltaic panel health database is established, so that the intelligent transportation and remote management of the photovoltaic power station are realized, and the operation and maintenance management cost is reduced.
Optionally, the system further comprises a camera, and the camera is connected with the control module.
After the fault position is determined according to the control module, the camera can be assisted to further confirm the fault position, so that the obtained fault position is more accurate.
Optionally, the system further comprises a robot connected to the control module.
After the fault position is determined, the photovoltaic system can be cleaned or maintained through the robot, and labor cost is reduced.
Implement the embodiment of the utility model provides a include following beneficial effect: the embodiment of the utility model realizes the protection of the photovoltaic panel and the circuit through the fuse type isolating switch, the anti-reverse diode and the circuit breaker which are connected in series; the current of each photovoltaic panel branch is measured through the Hall open-loop current sensor, and the current dispersion rate and the fault position are determined through the control module according to the current of each photovoltaic panel branch, so that the fault position is automatically, quickly and accurately determined.
While the preferred embodiments of the present invention have been described, the present invention is not limited to the embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention as defined by the appended claims.
Claims (7)
1. The utility model provides a photovoltaic board fault monitoring system, its characterized in that includes a plurality of fuse-type isolator, a plurality of prevents contrary diode, a plurality of hall ring-opening current sensor, two circuit breakers, control module, communication module, power module and terminal, fuse-type isolator prevent contrary diode and reach hall ring-opening current sensor series connection in proper order, photovoltaic module is connected to fuse-type isolator's the other end, a plurality of hall ring-opening current sensor's the other end is connected through two buses that converge respectively the one end of two circuit breakers, the dc-to-ac converter is connected to the other end of circuit breaker, control module connects hall ring-opening current sensor reaches power module, control module passes through communication module connects the terminal.
2. The photovoltaic panel fault monitoring system of claim 1, further comprising a lightning protection device, one end of the lightning protection device being connected to the circuit breaker and the other end of the lightning protection device being grounded.
3. The photovoltaic panel fault monitoring system of claim 1, wherein the communication module comprises any one of a wireless module or a bluetooth module.
4. The photovoltaic panel fault monitoring system of claim 1, further comprising a storage module connected to the control module through the communication module.
5. The photovoltaic panel fault monitoring system of claim 1, wherein the terminal comprises any one or more of a cloud platform, a handheld terminal, or a wearable terminal.
6. The photovoltaic panel fault monitoring system of claim 1, further comprising a camera, the camera connected to the control module.
7. The photovoltaic panel fault monitoring system of claim 1, further comprising a robot, the robot coupled to the control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220728554.3U CN217693256U (en) | 2022-03-31 | 2022-03-31 | Photovoltaic panel fault monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220728554.3U CN217693256U (en) | 2022-03-31 | 2022-03-31 | Photovoltaic panel fault monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217693256U true CN217693256U (en) | 2022-10-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220728554.3U Active CN217693256U (en) | 2022-03-31 | 2022-03-31 | Photovoltaic panel fault monitoring system |
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| Country | Link |
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| CN (1) | CN217693256U (en) |
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2022
- 2022-03-31 CN CN202220728554.3U patent/CN217693256U/en active Active
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