CN104836530A - Photovoltaic cell panel hot spot effect online detection apparatus - Google Patents
Photovoltaic cell panel hot spot effect online detection apparatus Download PDFInfo
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- CN104836530A CN104836530A CN201510243062.XA CN201510243062A CN104836530A CN 104836530 A CN104836530 A CN 104836530A CN 201510243062 A CN201510243062 A CN 201510243062A CN 104836530 A CN104836530 A CN 104836530A
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- 238000000034 method Methods 0.000 claims abstract description 21
- 238000010248 power generation Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000004148 unit process Methods 0.000 abstract 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
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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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Abstract
The invention discloses a photovoltaic cell panel hot spot effect online detection apparatus, and belongs to the field of photovoltaic generating. The method provided by the invention is as follows: first of all, a photovoltaic cell panel is taken as an integral body, output voltage signals and load current signals of the photovoltaic cell panel are acquired through a sensor unit, then a processor unit processes the acquired voltage signals and the current signals by use of a preset algorithm formula and outputs a processing result to a display unit, and finally, the display unit displays whether the photovoltaic cell panel generates a hot spot effect and the quantity of single cells generating the hot spot effect. According to the invention, whether the photovoltaic cell panel generates the hot spot effect and the quantity of the single cells generating the hot spot effect can be detected in an online mode, safety hidden risks caused by untimely maintenance to a photovoltaic system are avoided, and the reliability and the stability of the photovoltaic power generation system are further improved.
Description
Technical field
The present invention relates to field of photovoltaic power generation, especially a kind of photovoltaic battery panel hot spot effect on-line measuring device.
Background technology
Along with the continuous acceleration of economic globalization process and the fast development of industrial economy, worldwide energy shortage and environmental pollution have become two large key factors of restriction human social, and greatly developing the renewable free of contamination energy becomes the task of top priority.And solar energy have inexhaustible, nexhaustible, do not pollute the environment and destroy the feature of the ecological balance, be subject to the attention of more and more government and people.
Stability and the operating state of power output and each block photovoltaic battery panel of the work of solar energy (also claiming photovoltaic) power station are all closely bound up, how effectively to detect every block photovoltaic battery panel and failure diagnosis is the matter of utmost importance that maintenance photovoltaic plant normally works.But hot spot effect is extremely incident a kind of major failure phenomenon in the running of photovoltaic battery panel.Specifically, under the off quality or cell panel of, photovoltaic battery panel crested even at uneven illumination, photovoltaic battery panel itself installs and uses the situation such as improper, photovoltaic cell there will be hot spot effect, namely the outside power output of power supply is not re-used as, but the power that the photovoltaic cell becoming other non-cresteds of load consumption produces, now the generating efficiency of system can sharply decline, and the photovoltaic cell of crested time serious can due to overheated and burn, thus make system reliability reduce.
In order to avoid the problems referred to above, forefathers have done a lot of useful exploration.Such as, the people such as Zhang Zhen propose a kind of system and method detecting the solar cell leakage current of photovoltaic hot spot infringement, by temperature variations under testing solar battery reverse biased, judge the distribution situation of reverse-biased leakage current, according to reverse leakage current size, carry out cell classification, simultaneously by infra-red heat scanning phase, detect the distribution of solar cell reverse leakage current, pick out the battery that local electric leakage current density is large, thus avoid in the actual use of solar cell, the too high hot spot problem of temperature is produced in the reverse-biased situation of voltage that current mismatch causes, the shortcoming that the method exists: 1. under utilizing solar cell reverse biased, temperature variations is used as foundation, but temperature is easy to be affected by the external environment, 2. only judge that the battery reliability that local electric leakage current density is large is not very strong according to temperature, 3. infrared-ray scan technique cost is higher.And for example, the circuit arrangement of a kind of automatic identification photovoltaic battery panel assembly hot spot effect that the people such as Fang Dingyu propose and control method, the method utilizes sampling detector obtain the current signal in photovoltaic battery panel loop and transfer d. c. voltage signal to, be sent to hysteresis comparator unit, reference threshold in this d. c. voltage signal and reference cell compares by hysteresis comparator unit, the connecting and disconnecting of bypass diode assembly and cell panel are controlled by control unit, although the method can identify whether photovoltaic cell board component there occurs hot spot effect under certain condition automatically, but it the extent of damage of photovoltaic battery panel assembly hot spot effect can not be detected and fringe cost is higher.Also have, detection photovoltaic battery panel hot spot effect method conventional is at present the method based on infrared image analysis, it is fairly obvious with the photovoltaic cell monomer surface temperature contrast normally worked according to the photovoltaic cell monomer surface temperature that hot spot phenomenon occurs, the infrared image difference causing both to produce also is fairly obvious, by the treatment and analyses to infrared image, extract possible hot spot phenomenon fault zone and the characteristic information in region, thus can realize normally whether identifying photovoltaic cell monomer operating state, but there are some defects in this kind of method: 1. can not distinguish the unconspicuous state of temperature difference, accuracy of detection and accuracy are not high, 2. poor real and not easily realize on-line checkingi analysis etc.
Thus, how to detect the hot spot effect of photovoltaic module and the degree of hot spot infringement in real time, ensureing the stable of whole output power of photovoltaic module and improve the reliability of whole photovoltaic generating system, is the direction urgently studied at present.
Summary of the invention
The object of this invention is to provide a kind of photovoltaic battery panel hot spot effect on-line measuring device, belong to field of photovoltaic power generation.The technical solution adopted for the present invention to solve the technical problems is: first one piece of photovoltaic battery panel is considered as entirety, output voltage signal and the load current signal of photovoltaic battery panel is gathered by sensor unit, then processor unit uses the algorithmic formula preset to process the voltage signal gathered and current signal, and result is exported to display unit, whether last display unit display photovoltaic battery panel there is hot spot effect and the monocell number of hot spot effect occurs.Whether the present invention can there is hot spot effect and the cell number of hot spot effect occurs by on-line checkingi photovoltaic battery panel, avoids, because safeguarding the photovoltaic system potential safety hazard brought not in time, improving the reliability and stability of photovoltaic generating system further.
Further, described photovoltaic battery panel hot spot effect on-line measuring device comprises sensor unit, processor unit, display unit and power supply, its concrete testing process is: sensor unit gathers load current signal and the output voltage signal of a certain piece of photovoltaic battery panel, and collection the data obtained is inputed to processor unit, then processor unit calculates according to the algorithmic formula of setting, and then judges photovoltaic battery panel hot spot effect concrete condition.
Described sensor unit comprises current acquisition transducer and voltage acquisition transducer, current acquisition sensor series is on photovoltaic module array, and voltage acquisition sensor parallel is on photovoltaic module array, gather corresponding current signal (I) and voltage signal (U) with this.
Described processor unit, its main control chip is STC89C52RC.The algorithmic formula preset in processor unit is in addition as follows:
Power (the P that single battery generation hot spot effect consumes
m) be:
Wherein, M represents the monocell number of monitored photovoltaic module array, U
0represent rated voltage during monocell generating, R
eqrepresent the resistance value of monocell.
The current signal (I) gathered according to sensor unit and voltage signal (U), the power output (P) of corresponding photovoltaic module array is:
P＝UI
Suppose that the rated output power of this photovoltaic module array is P
0, then the cell number (N) of this photovoltaic module array generation hot spot effect is:
N＝(P
0-P)/P
m
Wherein, if N=0, then represent that this photovoltaic module array hot spot effect does not occur; N ≠ 0, then N is the cell number of photovoltaic module array generation hot spot effect.
Described display unit, its input is connected with described processor unit, when photovoltaic battery panel generation hot spot effect, display unit can show cell number and the hot spot extent of damage of photovoltaic battery panel generation hot spot effect, otherwise the cell number shown without hot spot effect generation and hot spot effect is zero.
Described power supply is rechargeable battery, is connected with described processor unit, sensor unit and display unit, for providing galvanic current pressure for whole checkout gear.
The invention has the advantages that: one, a kind of photovoltaic battery panel hot spot effect on-line measuring device is provided, realizes on-line checkingi analysis in real time; Its two, control device is powered by rechargeable battery, and reliability is strong; Its three, control device uses modularized design and cost of manufacture is low, can be mass.
Accompanying drawing explanation
In order to make the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail, wherein:
Fig. 1 is a kind of photovoltaic battery panel hot spot effect on-line measuring device schematic diagram.
Embodiment
Below with reference to accompanying drawing, the preferred embodiments of the present invention are described in detail; Should be appreciated that preferred embodiment only in order to the present invention is described, instead of in order to limit the scope of the invention.
Fig. 1 is a kind of photovoltaic battery panel hot spot effect on-line measuring device schematic diagram, as shown in the figure: the technical solution adopted in the present invention is: a kind of control method of photovoltaic module hot spot effect, one piece of photovoltaic battery panel is considered as entirety, output voltage signal and the load current signal of photovoltaic battery panel is gathered by sensor unit, then processor unit uses the algorithmic formula preset to process the voltage signal gathered and current signal, and result is exported to display unit, whether last display unit display photovoltaic battery panel there is hot spot effect and the monocell number of hot spot effect occurs.
Further, described photovoltaic battery panel hot spot effect on-line measuring device comprises sensor unit, processor unit, display unit and power supply, its concrete testing process is: sensor unit gathers load current signal and the output voltage signal of a certain piece of photovoltaic battery panel, and collection the data obtained is inputed to processor unit, then processor unit calculates according to the algorithmic formula of setting, and then judges photovoltaic battery panel hot spot effect concrete condition.
Described sensor unit comprises current acquisition transducer and voltage acquisition transducer, current acquisition sensor series is on photovoltaic module array, and voltage acquisition sensor parallel is on photovoltaic module array, gather corresponding current signal (I) and voltage signal (U) with this.
Described processor unit, its main control chip is STC89C52RC.The algorithmic formula preset in processor unit is in addition as follows:
Power (the P that single battery generation hot spot effect consumes
m) be:
Wherein, M represents the monocell number of monitored photovoltaic module array, U
0represent rated voltage during monocell generating, R
eqrepresent the resistance value of monocell.
The current signal (I) gathered according to sensor unit and voltage signal (U), the power output (P) of corresponding photovoltaic module array is:
P＝UI
Suppose that the rated output power of this photovoltaic module array is P
0, then the cell number (N) of this photovoltaic module array generation hot spot effect is:
N＝(P
0-P)/P
m
Wherein, if N=0, then represent that this photovoltaic module array hot spot effect does not occur; N ≠ 0, then N is the cell number of photovoltaic module array generation hot spot effect.
Described display unit, its input is connected with described processor unit, when photovoltaic battery panel generation hot spot effect, display unit can show cell number and the hot spot extent of damage of photovoltaic battery panel generation hot spot effect, otherwise the cell number shown without hot spot effect generation and hot spot effect is zero.
Described power supply is rechargeable battery, is connected with described processor unit, sensor unit and display unit, for providing galvanic current pressure for whole checkout gear.
The present embodiment utilizes monocell generation hot spot effect time institute consumed power, quantize the photovoltaic module array hot spot effect extent of damage, find a new approach for photovoltaic battery panel hot spot effect detects, further increase the reliability and stability of photovoltaic generating system.
Claims (5)
1. a photovoltaic battery panel hot spot effect on-line measuring device, it is characterized in that, comprise sensor unit, processor unit, display unit and power supply, the technical scheme adopted is: one piece of photovoltaic battery panel is considered as entirety, output voltage signal and the load current signal of photovoltaic battery panel is gathered by sensor unit, then processor unit uses the algorithmic formula preset to process the voltage signal gathered and current signal, and result is exported to display unit, whether last display unit display photovoltaic battery panel there is hot spot effect and the monocell number of hot spot effect occurs.
2. the control method of a kind of photovoltaic module hot spot effect according to claim 1, it is characterized in that, described sensor unit comprises current acquisition transducer and voltage acquisition transducer, current acquisition sensor series is on photovoltaic module array, and voltage acquisition sensor parallel is on photovoltaic module array, gather corresponding current signal (I) and voltage signal (U) with this.
3. the control method of a kind of photovoltaic module hot spot effect according to claim 1, it is characterized in that, described processor unit, its main control chip is STC89C52RC, and the algorithmic formula preset in processor unit is as follows:
Power (the P that single battery generation hot spot effect consumes
m) be:
Wherein, M represents the monocell number of monitored photovoltaic module array, U
0represent rated voltage during monocell generating, R
eqrepresent the resistance value of monocell;
The current signal (I) gathered according to sensor unit and voltage signal (U), the power output (P) of corresponding photovoltaic module array is:
P＝UI
Suppose that the rated output power of this photovoltaic module array is P
0, then the cell number (N) of this photovoltaic module array generation hot spot effect is:
N＝(P
0-P)/P
m
Wherein, if N=0, then represent that this photovoltaic module array hot spot effect does not occur; N ≠ 0, then N is the cell number of photovoltaic module array generation hot spot effect.
4. the control method of a kind of photovoltaic module hot spot effect according to claim 1, it is characterized in that, described display unit, its input is connected with described processor unit, when photovoltaic battery panel generation hot spot effect, display unit can show cell number and the hot spot extent of damage of photovoltaic battery panel generation hot spot effect, otherwise the cell number of display hot spot effect is zero namely to occur without hot spot effect.
5. the control method of a kind of photovoltaic module hot spot effect according to claim 1, it is characterized in that, described power supply is rechargeable battery, is connected with described processor unit, sensor unit and display unit, for providing galvanic current pressure for whole checkout gear.
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| CN201510243062.XA CN104836530A (en) | 2015-05-13 | 2015-05-13 | Photovoltaic cell panel hot spot effect online detection apparatus |
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| CN201510243062.XA CN104836530A (en) | 2015-05-13 | 2015-05-13 | Photovoltaic cell panel hot spot effect online detection apparatus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106208958A (en) * | 2016-07-08 | 2016-12-07 | 江苏华西新能源工程技术有限公司 | Photovoltaic module hot spot online test method |
| CN113466253A (en) * | 2020-03-31 | 2021-10-01 | 苏州阿特斯阳光电力科技有限公司 | Method and equipment for detecting hot spot defect of solar cell |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104009713A (en) * | 2014-05-26 | 2014-08-27 | 扬州虹扬科技发展有限公司 | Circuit device capable of automatically recognizing hot spot effect of photovoltaic cell panel assembly |
| CN104467663A (en) * | 2014-11-21 | 2015-03-25 | 河海大学常州校区 | System and method for detecting photovoltaic hot spot damage solar cell leak currents |
| CN104601108A (en) * | 2015-02-10 | 2015-05-06 | 河海大学常州校区 | Small photovoltaic power station fault diagnosis method |
| CN104601109A (en) * | 2014-12-25 | 2015-05-06 | 重庆大学 | Photovoltaic hot spot effect detection method for electricity-graph model |
-
2015
- 2015-05-13 CN CN201510243062.XA patent/CN104836530A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104009713A (en) * | 2014-05-26 | 2014-08-27 | 扬州虹扬科技发展有限公司 | Circuit device capable of automatically recognizing hot spot effect of photovoltaic cell panel assembly |
| CN104467663A (en) * | 2014-11-21 | 2015-03-25 | 河海大学常州校区 | System and method for detecting photovoltaic hot spot damage solar cell leak currents |
| CN104601109A (en) * | 2014-12-25 | 2015-05-06 | 重庆大学 | Photovoltaic hot spot effect detection method for electricity-graph model |
| CN104601108A (en) * | 2015-02-10 | 2015-05-06 | 河海大学常州校区 | Small photovoltaic power station fault diagnosis method |
Non-Patent Citations (2)
| Title |
|---|
| 吴春华，周笛青，李智华，付立: "光伏组件热斑诊断及模糊优化控制方法", 《中国电机工程学报》 * |
| 李兵峰: "光伏阵列故障检测方法的研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106208958A (en) * | 2016-07-08 | 2016-12-07 | 江苏华西新能源工程技术有限公司 | Photovoltaic module hot spot online test method |
| CN113466253A (en) * | 2020-03-31 | 2021-10-01 | 苏州阿特斯阳光电力科技有限公司 | Method and equipment for detecting hot spot defect of solar cell |
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Application publication date: 20150812 |
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