CN202815166U - Detection device of solar energy photovoltaic array I-V characteristic - Google Patents
Detection device of solar energy photovoltaic array I-V characteristic Download PDFInfo
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- CN202815166U CN202815166U CN2012204440577U CN201220444057U CN202815166U CN 202815166 U CN202815166 U CN 202815166U CN 2012204440577 U CN2012204440577 U CN 2012204440577U CN 201220444057 U CN201220444057 U CN 201220444057U CN 202815166 U CN202815166 U CN 202815166U
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Abstract
The present utility model relates to the photovoltaic industry I-V characteristic detection apparatus field, concretely to a detection device used in solar energy photovoltaic array I-V characteristic. The device comprises a charging test circuit and an I-V data acquisition system, the charging test circuit comprises a capacitor, and the capacitor is connected with the I-V data acquisition system. In the device, the capacitor charging and measuring principle is applied, large power photovoltaic array performance can be accurately and rapidly measured and identified, and the operation is convenient and safe. Moreover, various on-site environment factors can be fully considered to modify power, thus maximum power reckoning under the standard condition can be conveniently realized, and effects of accurate measuring and analyzing of the detection device can be realized.
Description
Technical field
The utility model relates to the detecting instrument field of photovoltaic industry I-V characteristic, specifically a kind of pick-up unit for photovoltaic array I-V characteristic.
Background technology
Provided corresponding technical requirement according to national GBT18210-2000 " in-site measurement of crystalline silicon photovoltaic (PV) square formation I-V characteristic ".In 20 years after putting into operation, the power station operator is also wanted constantly the I-V characteristic of each subarray of photovoltaic plant to be tested, so that maintenance and repair.Temperature and the irradiance modification method of the I-V actual measurement characteristic of industry standard GBT 6495.4-1996 crystal silicon photovoltaic devices carry out the correction of output power, realize that online data relatively.
Because technical reason, the present I-V characteristic test of photovoltaic industry analytical instrument is all for single PV battery component, and full test power is no more than 10kW usually, can not satisfy the photovoltaic plant needs far away.Take the 10MW photovoltaic plant as example, approximately become by 100 group of subarrays of specific power 100kW at least.Therefore, powerful photovoltaic array performance measurement and evaluation are the difficult problems of photovoltaic industry always.
Photovoltaic module I-V Characteristics Detection can be used pulsed solar simulator or constant light simulator.But, because spectrum and sunshine matching degree is different; Because pointolite is radiated on the sample, because of the even property of the different uneven illuminations that produce of incident angle and light distance; Because optical pulse shape and duration is different; Because the optical property difference in the Assembled lamp light source between each lamp, must cause all that practical situations has larger difference under test result and the sunshine, also cause the test result between each laboratory that larger difference is arranged.So survey temperature and the irradiance modification method of characteristic according to the I-V of GBT18210-2000 " in-site measurement of crystalline silicon photovoltaic (PV) square formation I-V characteristic " and GBT6495.4-1996 crystal silicon photovoltaic devices, carry out the correction of output power, thereby objective assessment and measurement are done in the generating of actual power station.
For light condensing type photovoltaic power generation system, because the specific (special) requirements of condenser curve and optical axis location, be necessary for directional light so that measure with incident light, this requirement has been negated the use of pointolite pulse simulator, and the constant light simulator also is difficult to condenser size coupling or measured power excessive and actual infeasible because of its dimension of light source.
With regard to photovoltaic array I-V feature measurement since photovoltaic array power large (〉=100kW) and require instantaneous measurement and can not on-the-spotly use traditional power measurement method, comprise methods such as using program control load.And because photovoltaic array voltage is high, electric current is large, also there is no available I-V characteristic I-V data acquisition system (DAS) at present.
In order to overcome the above problems, the utility model has been done useful improvement.
The utility model content
The technical matters that (one) will solve
The purpose of this utility model provides a kind of pick-up unit that the capacitor charging measuring principle is measured big-power solar photovoltaic array I-V characteristic of using.
(2) technical scheme
The utility model is achieved through the following technical solutions: a kind of pick-up unit of photovoltaic array I-V characteristic, it is characterized in that, comprise charging measurement circuit and I-V data acquisition system (DAS), described charging measurement circuit comprises capacitor, and described capacitor links to each other with described I-V data acquisition system (DAS).
Wherein, described I-V data acquisition system (DAS) comprises current sampling resistor and voltage sampling resistor; Described current sampling resistor is connected with described capacitor's seriesu, and described voltage sampling resistor is connected with this Parallel-connected Capacitor.
Further, be provided with the first circuit controling switch and second circuit gauge tap in the described charging measurement circuit; Described the first circuit controling switch and described capacitor, current sampling resistor are connected in series successively; Thereby described second circuit gauge tap and described voltage sampling resistor are connected in series the shunt that consists of the charging measurement circuit, and this is connected with described Parallel-connected Capacitor along separate routes.
Wherein, described the first circuit controling switch links to each other with the I-V data acquisition system (DAS) respectively with the second circuit gauge tap.
And described the first circuit controling switch and second circuit gauge tap are respectively the arc extinguishing relay switch.
In addition, this pick-up unit also comprises computer data processing system, and described computer data processing system links to each other with described I-V data acquisition system (DAS).
In addition, this pick-up unit also comprises monocrystalline silicon battery sensor and temperature thermopair, and described monocrystalline silicon battery sensor is connected with the temperature thermopair with described I-V data acquisition system (DAS) and is connected.
(3) beneficial effect
Compare with product with prior art, the utility model has the following advantages:
1. the utility model is used the capacitor charging measuring principle, and can measure quickly and accurately and identify powerful photovoltaic array performance, and easy to operate, safety;
2. the utility model takes into full account various environmental factors in the Test Field, can revise power, so that the peak power of carrying out under the standard conditions calculates, thereby makes pick-up unit reach the effect that Measurement accuracy is analyzed.
Description of drawings
Fig. 1 is module connection diagram of the present utility model;
Fig. 2 is the circuit diagram of charging measurement circuit of the present utility model.
1, photovoltaic array, 2, charging measurement circuit, 21, the first circuit controling switch, 22, second circuit gauge tap, 23, capacitor, 3, the I-V data acquisition system (DAS), 31, current sampling resistor, 32, voltage sampling resistor, 4, computer data processing system, 5, sunlight irradiation degree monitoring calibration system.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is made a detailed explanation.
The IV characteristic of photovoltaic array is that photovoltaic plant is checked and accepted the evaluation detection, daily servicing is tested requisite test event.As shown in Figure 1, a kind of pick-up unit of photovoltaic array I-V characteristic, this device comprise charging measurement circuit 2, I-V data acquisition system (DAS) 3 and computer data processing system 4.
As shown in Figure 2, photovoltaic array 1 is provided with capacitor 23 to 2 discharges of charging measurement circuit in this charging measurement circuit 2, and I-V data acquisition system (DAS) 3 connects charging measurement circuit 2, gathers the electric current of charging measurement circuit 2 and the voltage data of capacitor 23.The data that I-V data acquisition system (DAS) 3 collects all transfer to computer data processing system 4 and analyze.For the data that collect, computer data processing system 4 at first shows with curvilinear figure, and the user can analyze the problem that tested array exists by the experience of distortion and the long-term accumulation of figure, comprises that hot spot, contact are bad, individual groups string damage etc.
In charging measurement circuit 2, the two ends of capacitor 23 link to each other with photovoltaic array 1 respectively; I-V data acquisition system (DAS) 3 comprises current sampling resistor 31 and voltage sampling resistor 32; Described current sampling resistor 31 is connected in series with described capacitor 23, and described voltage sampling resistor 32 is connected in parallel with this capacitor 23.In addition, be provided with the first circuit controling switch 21 and second circuit gauge tap 22 in the charging measurement circuit, they link to each other with I-V data acquisition system (DAS) 3 respectively; The first circuit control is opened 21 and is connected in series successively with described capacitor 23, current sampling resistor 31; Thereby second circuit gauge tap 22 is connected in series the shunt that consists of this charge circuit with institute's voltage sampling resistor 32, and this shunt is connected in parallel with described capacitor 23.The first circuit controling switch 21 and second circuit gauge tap 22 all adopt high-power arc extinguishing relay switch, increase the safety coefficient of pick-up unit.
The principle that 2 pairs of photovoltaic arrays of this charging measurement circuit carry out data acquisition: the capacitor 23 in this circuit is when just beginning to charge, and impedance is very low almost nil, and charge circuit is equivalent to short circuit, and the data of this moment are short-circuit current; When capacitor 23 chargings finished, impedance was very large, and charge circuit is equivalent to open circuit, and the data of this moment are open-circuit voltage.In the charging process of capacitor 23, the impedance of electric capacity is from the zero infinity that changes to, and this load that just is equivalent to photovoltaic array changes to infinity from zero.
Voltage V on the capacitor 23 and the relation of charging current I have also reflected current voltage and the current relationship of photovoltaic array 1 simultaneously.Electric current and voltage to capacitor 23 whole charging processes is sampled, the combination of these sampled points has just consisted of the array IV family curve under the current environment condition, known the corresponding relation of I-V, computer data processing system 4 is provided with special software and just can calculates peak power and be depicted as curve.Whole measuring process is described below: at first I-V data acquisition system (DAS) 3 makes second circuit gauge tap 22 closures to 22 control signals of second circuit gauge tap, by power resistor R electric quantity consumption remaining on the electric capacity is fallen, and makes electric capacity keep zero at the beginning state.Then, I-V data acquisition system (DAS) 3 goes to make its disconnection to 22 control signals of second circuit gauge tap, go to make its closure to the first circuit controling switch 21 Power Generation Road control signals, control simultaneously voltage sample resistance 31, current sampling resistor 32 and by suitable sample rate voltage, the electric current of the whole process of capacitor 23 chargings are sampled.During the first circuit controling switch 21 firm closure, the charging current that flows through capacitor 23 is exactly the short-circuit current I of photovoltaic array 1; When the charging current that flows through capacitor 23 was zero, expression capacitor 23 charging processes finished, and this moment, the voltage of sampling was exactly the open-circuit voltage V of photovoltaic array 1.As long as this method is chosen suitable electric capacity, switch (capacity is enough large), can measure in theory the characteristic of any photovoltaic array.
Be provided with data processor in the I-V data acquisition system (DAS) 3, have the function of measurement result being calculated the standard conditions data, irradiance and backboard temperature that the reckoning factor is generally acknowledged by industry.Calculate that the factor also adopts the reckoning factor of recommending that present photovoltaic industry is generally acknowledged or international.The pick-up unit of this photovoltaic array I-V characteristic also is provided with sunlight irradiation degree monitoring calibration system 5, this system comprises monocrystalline silicon battery sensor and temperature thermopair, this monocrystalline silicon battery sensor links to each other with I-V data acquisition system (DAS) 3 respectively with the temperature thermopair, purpose is to be Test Field sunlight irradiation intensity and environment temperature, in order to carry out the reckoning of peak power under the standard conditions.
This pick-up unit has been filled up the blank of domestic high-power photovoltaic IV feature measurement, and it is short to carry out the large power test time, and test result can determine whether by curve and has large problem; In the computer data processing system 4 of this device, directly will analyze data-switching STC by software, more help to analyze power station actual power ability; In addition, can make its accuracy can be traceable to National primary standard by external calibration, compare with National primary standard and provide error.All test datas all do not have artificially to implant experimental formula, artificially add the factor or artificial the correction.Design according to outdoor, high-power request for utilization, still also can be used in the test of the above photovoltaic module of 100W.
The above only is preferred embodiment of the present utility model, and is in order to limit the utility model, not all within spirit of the present utility model and principle, any modification of doing, is equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (7)
1. the pick-up unit of a photovoltaic array I-V characteristic is characterized in that, comprises charging measurement circuit and I-V data acquisition system (DAS), and described charging measurement circuit comprises capacitor, and described capacitor links to each other with described I-V data acquisition system (DAS).
2. the pick-up unit of photovoltaic array I-V characteristic according to claim 1 is characterized in that, described I-V data acquisition system (DAS) comprises current sampling resistor and voltage sampling resistor; Described current sampling resistor is connected with described capacitor's seriesu, and described voltage sampling resistor is connected with this Parallel-connected Capacitor.
3. the pick-up unit of photovoltaic array I-V characteristic according to claim 2 is characterized in that, is provided with the first circuit controling switch and second circuit gauge tap in the described charging measurement circuit; Described the first circuit controling switch and described capacitor, current sampling resistor are connected in series successively; Thereby described second circuit gauge tap and described voltage sampling resistor are connected in series the shunt that consists of this charging measurement circuit, and this is connected with described Parallel-connected Capacitor along separate routes.
4. the pick-up unit of photovoltaic array I-V characteristic according to claim 2 is characterized in that, described the first circuit controling switch links to each other with the I-V data acquisition system (DAS) respectively with the second circuit gauge tap.
5. the pick-up unit of photovoltaic array I-V characteristic according to claim 2 is characterized in that, described the first circuit controling switch and second circuit gauge tap are respectively the arc extinguishing relay switch.
6. the pick-up unit of photovoltaic array I-V characteristic according to claim 1 is characterized in that, also comprises computer data processing system, and described computer data processing system links to each other with described I-V data acquisition system (DAS).
7. the pick-up unit of each described photovoltaic array I-V characteristic according to claim 1-6, it is characterized in that, this pick-up unit also comprises monocrystalline silicon battery sensor and temperature thermopair, and described monocrystalline silicon battery sensor is connected with the temperature thermopair with described I-V data acquisition system (DAS) and is connected.
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| CN2012204440577U CN202815166U (en) | 2012-08-31 | 2012-08-31 | Detection device of solar energy photovoltaic array I-V characteristic |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103684252A (en) * | 2013-12-06 | 2014-03-26 | 武汉理工大学 | Concentrating photovoltaic outdoor performance test system |
| CN105162415A (en) * | 2015-07-22 | 2015-12-16 | 中山大学 | Current and voltage tester for photovoltaic array |
| CN105897161A (en) * | 2016-06-06 | 2016-08-24 | 河海大学常州校区 | Outdoor photovoltaic module detection system based on dynamic capacitance charge and discharge and test method |
| CN107800384A (en) * | 2017-10-19 | 2018-03-13 | 中国电子科技集团公司第四十研究所 | A kind of concurrency control method for the test of photovoltaic module IV Character Comparisons |
| CN108063597A (en) * | 2016-11-08 | 2018-05-22 | 阿特斯阳光电力集团有限公司 | Photovoltaic module outdoor test system and its test method |
| CN108123679A (en) * | 2017-12-14 | 2018-06-05 | 中国电子科技集团公司第四十研究所 | A kind of adaptive range photovoltaic module rapid test device based on combination capacitor |
| CN108418547A (en) * | 2018-05-07 | 2018-08-17 | 北京汉能光伏投资有限公司 | Domestic solar outgoing electrical measurement test system |
| CN108566161A (en) * | 2018-03-07 | 2018-09-21 | 深圳市全球通检测服务有限公司 | New energy C-V characteristic detecting system |
| CN110557092A (en) * | 2019-09-06 | 2019-12-10 | 中国计量科学研究院 | Irradiance compensation method for photoelectric performance test of solar cell |
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2012
- 2012-08-31 CN CN2012204440577U patent/CN202815166U/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103684252A (en) * | 2013-12-06 | 2014-03-26 | 武汉理工大学 | Concentrating photovoltaic outdoor performance test system |
| CN103684252B (en) * | 2013-12-06 | 2016-01-06 | 武汉理工大学 | A kind of condensation photovoltaic outdoor performance test system |
| CN105162415A (en) * | 2015-07-22 | 2015-12-16 | 中山大学 | Current and voltage tester for photovoltaic array |
| CN105897161A (en) * | 2016-06-06 | 2016-08-24 | 河海大学常州校区 | Outdoor photovoltaic module detection system based on dynamic capacitance charge and discharge and test method |
| CN105897161B (en) * | 2016-06-06 | 2018-05-22 | 河海大学常州校区 | A kind of test method of the outdoor photovoltaic module detecting system based on dynamic capacity charge and discharge |
| CN108063597A (en) * | 2016-11-08 | 2018-05-22 | 阿特斯阳光电力集团有限公司 | Photovoltaic module outdoor test system and its test method |
| CN107800384A (en) * | 2017-10-19 | 2018-03-13 | 中国电子科技集团公司第四十研究所 | A kind of concurrency control method for the test of photovoltaic module IV Character Comparisons |
| CN108123679A (en) * | 2017-12-14 | 2018-06-05 | 中国电子科技集团公司第四十研究所 | A kind of adaptive range photovoltaic module rapid test device based on combination capacitor |
| CN108566161A (en) * | 2018-03-07 | 2018-09-21 | 深圳市全球通检测服务有限公司 | New energy C-V characteristic detecting system |
| CN108418547A (en) * | 2018-05-07 | 2018-08-17 | 北京汉能光伏投资有限公司 | Domestic solar outgoing electrical measurement test system |
| CN108418547B (en) * | 2018-05-07 | 2024-03-08 | 东君新能源有限公司 | Solar outdoor power generation test system |
| CN110557092A (en) * | 2019-09-06 | 2019-12-10 | 中国计量科学研究院 | Irradiance compensation method for photoelectric performance test of solar cell |
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