CN106656042B - A kind of photovoltaic panel safety detection and lifetime estimation method - Google Patents

A kind of photovoltaic panel safety detection and lifetime estimation method Download PDF

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Publication number
CN106656042B
CN106656042B CN201611264087.9A CN201611264087A CN106656042B CN 106656042 B CN106656042 B CN 106656042B CN 201611264087 A CN201611264087 A CN 201611264087A CN 106656042 B CN106656042 B CN 106656042B
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photovoltaic panel
controller
photovoltaic
temperature
real
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CN106656042A (en
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姚志民
尚建坤
牛冰玉
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JIANGSU FUYIHE NEW ENERGY TECHNOLOGY Co.,Ltd.
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ANHUI JINGRUN NEW ENERGY Co Ltd
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02SGENERATION OF ELECTRIC POWER BY CONVERSION OF INFRA-RED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S50/00Monitoring or testing of PV systems, e.g. load balancing or fault identification
    • H02S50/10Testing of PV devices, e.g. of PV modules or single PV cells
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy

Abstract

The invention discloses a kind of photovoltaic panel safety detection and lifetime estimation methods, based on the photovoltaic system comprising photovoltaic panel, temperature sensor, ammeter, voltmeter, controller, the present invention is to consider the operating temperature parameter, generated output parameter and external environment condition parameter of photovoltaic panel photoelectric conversion material, calculate a quantized values, with the working life of accurate evaluation photovoltaic panel, staff is reminded to replace in time, facilitate the plant maintenance in large-sized photovoltaic power plant, maintenance cost is reduced, has ensured generating efficiency.

Description

A kind of photovoltaic panel safety detection and lifetime estimation method
Technical field
The invention belongs to solar energy generation technology fields, and in particular to a kind of photovoltaic panel safety detection and life appraisal system System.
Background technology
Photovoltaic generation is one of the technological means of human use's solar energy.Existing photovoltaic power generation plate is to turn polylith photoelectricity Conversion materials are integrated in one piece of substrate, are finally assemblied at and are made on holder.In large-scale photovoltaic power plant, it can use The photovoltaic power generation plate of enormous amount is arranged into array, is connected to boosting by series-parallel circuit, convertor equipment exists power storage In accumulator or it is connected to the grid.
It is well known that photovoltaic material has certain service life, and due to manufacturing process complexity, each piece of photovoltaic hair Battery plate may all have different service life.In addition, due to the presence of integrated circuit or other failures, each piece is also led to The service life of photovoltaic power generation plate is not quite similar.Also another key factor is exactly the operational heat problem of semiconductor silicon material, sternly Ghost image rings the working life of photovoltaic panel.
In conclusion there are the terminations of random working life for a large amount of photovoltaic panels in large-sized photovoltaic power plant, or based on hair The case where electric benefit considers and should terminate that use.
Although whether the system for currently existing photovoltaic panel remote failure remote monitoring normally only deposits photovoltaic panel It nonserviceables and is judged.System and method currently without photovoltaic panel working life is detected and is assessed.
Invention content
The purpose of the present invention is to the photovoltaic panel working lives to enormous amount in large-sized photovoltaic power plant to carry out standard Really assessment, it is proposed that a kind of service life evaluation system and method, while early warning can be carried out to the safety of photovoltaic panel.It is of the present invention Working life termination typically refer to photovoltaic panel physical attribute end-of-life or based on power benefit consider the service life should terminate that.
Present invention firstly provides a kind of photovoltaic panel safety detection and service life evaluation systems, include mainly photovoltaic panel, temperature Sensor, ammeter, voltmeter, controller;
The quantity of the temperature sensor is at least one, is located at the photovoltaic back, and connect with photoelectric conversion material Touch installation;The ammeter and voltmeter are separately mounted on the power output terminal of the photovoltaic panel;The temperature sensor, Ammeter, voltmeter are separately connected controller;The controller persistently receives the temperature signal of temperature sensor, selects the highest temperature It spends and compared with fixed threshold;The controller persistently receives the electric current of ammeter and voltmeter, voltage signal, and calculates photovoltaic The output power of plate.
Photovoltaic panel safety detection and service life evaluation system further include the thermometer and illumination photometer being connected with controller, are used respectively In real-time measuring environment temperature and solar illuminance.
As further optimization technique means, the quantity of the temperature sensor is 3 or 3 or more, distributing installation In photovoltaic panel back center region.
The present invention also provides a kind of photovoltaic panel safety detection and lifetime estimation methods, execute in accordance with the following steps:
Step 1, the temperature of temperature sensor measurement photoelectric conversion material, when detection temperature value T exceeds secure threshold T ' When, controller disconnects the output circuit of photovoltaic panel and alarm;
Step 2, when the detection temperature value T of photoelectric conversion material is less than secure threshold T ', controller according to ammeter and Photovoltaic panel output current I that voltmeter measures in real time and voltage value U calculates the real-time output power G of photovoltaic panel, and according to the following formula into Row calculates:
Wherein, δ is the integrated value in 0- Δ T times, T0It is real time environment temperature, L is real-time solar illuminance, and Δ is Δ Gross output in T time;
Step 3, the δ that controller will calculate the δ of gained and prestore0It compares, if δ≤δ0, then judge the work of photovoltaic panel Service life expires;
Step 4, if δ >=δ0, then step 1 is repeated to step 3.
Further, in step 2, including the measurement to temperature and illuminance.
Further, in step 3, controller disconnects photovoltaic panel output circuit and alarms.
The present invention is to join the operating temperature parameter, generated output parameter and external environment of photovoltaic panel photoelectric conversion material Number is considered, and the numerical value of a quantization is calculated, with the working life of accurate evaluation photovoltaic panel, remind staff and Shi Jinhang is replaced, and is facilitated the plant maintenance in large-sized photovoltaic power plant, is reduced maintenance cost, has ensured generating efficiency.
Description of the drawings
Fig. 1 is the photovoltaic system structural schematic block diagram of the present invention;
Fig. 2 is photovoltaic panel and detection device schematic diagram in the present invention;
Fig. 3 is the photovoltaic panel safety detection of the present invention and the work flow diagram of lifetime estimation method.
In figure:1, photovoltaic panel;2, temperature sensor;3, ammeter;4, voltmeter.
Specific implementation mode
Present invention is further described in detail below in conjunction with the accompanying drawings:
Referring to attached drawing 1-2, a kind of photovoltaic system of the invention, mainly include photovoltaic panel 1, temperature sensor 2, ammeter 3, Voltmeter 4, controller (not shown);
The quantity of the temperature sensor 2 is at least one, is located at 1 back side of the photovoltaic panel, and and photoelectric conversion material Contact installation;The ammeter 3 and voltmeter 4 are separately mounted on the power output terminal of the photovoltaic panel 1;The temperature passes Sensor 2, ammeter 3, voltmeter 4 are separately connected controller;The controller persistently receives the temperature signal of temperature sensor 2, Select maximum temperature and compared with fixed threshold;The controller persistently receives the electric current of ammeter 3 and voltmeter 4, voltage letter Number, and calculate the output power of photovoltaic panel 1.
As shown in Figure 1, further, photovoltaic system of the invention further includes the thermometer being connected with controller and illumination Meter, is respectively used to real-time measuring environment temperature T0With solar illuminance L.
As further optimization technique means, the quantity of the temperature sensor is 3 or 3 or more, distributing installation In photovoltaic panel back center region.
The operation principle and safety detection and lifetime estimation method of the photovoltaic system of the present invention are described in detail as follows.
The temperature sensor 2 of the present invention directly measures the temperature of photoelectric conversion material, when detection temperature value T exceeds safety threshold When value T ' (T >=T '), controller directly disconnects the output circuit of photovoltaic panel, and photovoltaic panel is made to be stopped, and ensures photovoltaic panel itself Safety.When working if normal, photoelectric conversion material temperature reaches or exceeds the upper limit, then there is operation troubles or the photovoltaic panel service life arrives Up to final value, therefore controller answers alarm staff to be maintained or replaced recycling.
When the observed temperature value T of photoelectric conversion material is less than secure threshold T ', controller is according to ammeter and voltmeter The photovoltaic panel output current I and voltage value U measured in real time calculates the real-time output power G=IU of photovoltaic panel.It is counted according to the following formula It calculates:
Wherein, δ is the integrated value in 0- Δ T times, T0It is real time environment temperature, L is real-time solar illuminance.
Above formula is meant that, is considering illuminance L to environment temperature T0And power generation output power G contribution when, in Δ T Gross output δ in time.In this formula, consider that calculating data are excessive, therefore extraction of square root is taken to handle, final δ values are simultaneously Without physical meaning, only indicate and the relevant assessment parameter of photovoltaic panel gross output feature in Δ T time.
According to the theoretical value or empirical value in photovoltaic panel service life, determine that one can reflect that photovoltaic panel integrates forward efficiency output work The δ of rate value0Value.
The δ that controller will calculate the δ of gained and prestore0It compares, if δ≤δ0, then judge that the working life of photovoltaic panel arrives Phase can not obtain positive power benefit again, and controller disconnects the photovoltaic panel output circuit, and alarm staff should be right Photovoltaic panel is replaced, and carries out eliminating recycling.
If δ >=δ0, then illustrate that photovoltaic panel working condition is normal, the power benefit with positive value can continue to stablize progress Opto-electronic conversion.Therefore cycle detection and the assessment of next round can be carried out.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power Profit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent requirements of the claims Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art The other embodiment being appreciated that.
The present invention is not limited to above to the description of embodiment, those skilled in the art according to disclosure of the present invention, The creative work improvement and modification that be carried out need not be passed through on the basis of the present invention, all should protection scope of the present invention it It is interior.

Claims (2)

1. a kind of photovoltaic panel safety detection and lifetime estimation method, which is characterized in that
Based on the photovoltaic system comprising photovoltaic panel, temperature sensor, ammeter, voltmeter, controller, execute as follows:
Step 1, the temperature of temperature sensor measurement photovoltaic panel photoelectric conversion material, when detection temperature value T exceeds secure threshold T ' When, controller disconnects the output circuit of photovoltaic panel and alarm;
Step 2, photovoltaic system further include the thermometer and illumination photometer being connected with controller, are carried out to temperature and illuminance real-time It measures;
When the detection temperature value T of photoelectric conversion material is less than secure threshold T ', controller is real-time according to ammeter and voltmeter The photovoltaic panel output current I and voltage value U of measurement calculate the real-time output power G of photovoltaic panel, and are calculated according to the following formula:
Wherein, δ is the integrated value in 0- Δ T times, T0It is real time environment temperature, L is real-time solar illuminance, and δ is Δ T time Interior gross output;
Step 3, the δ that controller will calculate the δ of gained and prestore0It compares, if δ≤δ0, then judge the working life of photovoltaic panel It expires;
Step 4, if δ >=δ0, then step 1 is repeated to step 3.
2. a kind of photovoltaic panel safety detection according to claim 1 and lifetime estimation method, which is characterized in that
In step 3, controller disconnects photovoltaic panel output circuit and alarms.
CN201611264087.9A 2016-12-30 2016-12-30 A kind of photovoltaic panel safety detection and lifetime estimation method Active CN106656042B (en)

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KR101632831B1 (en) * 2015-02-24 2016-06-23 울산과학대학교 산학협력단 Apparatus for fault location detection of the photovoltaic module
CN105717854A (en) * 2014-12-03 2016-06-29 西安银河网电智能电气有限公司 Roof photovoltaic power generation monitoring system
CN106100578A (en) * 2016-05-30 2016-11-09 佛山科学技术学院 A kind of fault detection method being applicable to photovoltaic parallel in system and system thereof
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* Cited by examiner, † Cited by third party
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CN103235221A (en) * 2013-04-18 2013-08-07 河海大学常州校区 Fault detecting system and fault detecting method for photovoltaic power station remote monitoring
CN103472331A (en) * 2013-09-13 2013-12-25 同济大学 Photovoltaic power generation fault diagnosis system based on photovoltaic physical model
CN104615187A (en) * 2013-11-01 2015-05-13 上海岩芯电子科技有限公司 Solar photovoltaic system hot spot detection and optimal control method
CN103605369A (en) * 2013-11-22 2014-02-26 航天科工深圳(集团)有限公司 Solar cell assembly hot spot monitoring system and method based on unmanned plane
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