CN104967406B - The measuring instrument of a kind of photovoltaic module array DC generation characteristic and measuring method thereof - Google Patents
The measuring instrument of a kind of photovoltaic module array DC generation characteristic and measuring method thereof Download PDFInfo
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- CN104967406B CN104967406B CN201510223232.8A CN201510223232A CN104967406B CN 104967406 B CN104967406 B CN 104967406B CN 201510223232 A CN201510223232 A CN 201510223232A CN 104967406 B CN104967406 B CN 104967406B
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- 238000005259 measurement Methods 0.000 claims abstract description 55
- 230000003068 static effect Effects 0.000 claims abstract description 21
- 239000003990 capacitor Substances 0.000 claims description 13
- 230000006870 function Effects 0.000 claims description 11
- 229920000642 polymer Polymers 0.000 claims description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 2
- 229910052744 lithium Inorganic materials 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims 1
- 230000036962 time dependent Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 10
- 230000005611 electricity Effects 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 238000013461 design Methods 0.000 description 6
- 238000010248 power generation Methods 0.000 description 5
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- 238000005516 engineering process Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000009795 derivation Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
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- 238000005286 illumination Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
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- 230000015572 biosynthetic process Effects 0.000 description 1
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- 229910021419 crystalline silicon Inorganic materials 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 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
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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 measuring instrument and the measuring method thereof of a kind of photovoltaic module array DC generation characteristic, it is used for measuring solar photovoltaic generation system photovoltaic module array DC generation characteristic, wherein, the measuring instrument of described photovoltaic module array DC generation characteristic includes: a body, control panel it is provided with, described the internal static measuring devices being provided with for measuring Open Output Voltage and short-circuit output current and for measuring the dynamic measurement device of current-voltage characteristic on described body.Obtain Open Output Voltage, short-circuit output current, peak power output, activity coefficient by static measurement and kinetic measurement in use and produce the voltage and current of maximum power point.Which increase power measurement scope, and by the peak power recorded under the conditions of the on-the-spot peak power recorded release laboratory standard, there is good popularizing application prospect.
Description
Technical field
The present invention relates to technical field of photovoltaic power generation, particularly to the measurement of a kind of photovoltaic module array DC generation characteristic
Instrument and measuring method thereof.
Background technology
Solar electrical energy generation is divided into photo-thermal power generation and photovoltaic generation.The solar electrical energy generation generally said refers to photovoltaic and sends out
Electricity, is called for short " photoelectricity ".Photovoltaic generation is to utilize the photovoltaic effect of interface that luminous energy is directly translated into electric energy
A kind of technology.The key element of this technology is solaode.Solaode carries out packaging protection after series connection can shape
Become large-area solar module, then coordinate the parts such as upper power controller to be the formation of photovoltaic power generation apparatus.Photovoltaic plant
Being by equipment and generating and to monitor integrated system, he monitors generator unit and generated energy.China has built up closely
The photovoltaic plant of hundred MW class, new Five Year Development Plan, again to distributed photovoltaic power station and roof photovoltaic power station with build
Build the development of integrated optical overhead utility.
Photovoltaic generation type can be divided into direct current light photovoltaic generating system (as it is shown in figure 1, comprising: solar cell array, control
Device processed, DC load and accumulator battery, described controller connects solar cell array, DC load and accumulator respectively
Group.), DC-AC electricity generation system (as in figure 2 it is shown, comprising: solar cell array, controller, DC load, direct current/
AC inverter, AC load and accumulator battery), photovoltaic-wind-electricity complementary electricity generation system etc..Regardless of whether which kind of power generation type,
Basic structure is photovoltaic battery panel (P-V assembly) array (being called for short photovoltaic module array) in solar cell array.Photovoltaic
The photoirradiation of the sun is converted to unidirectional current by assembly array, then be converted into by unidirectional current by inverter can be grid-connected or electrician is electric
The 220V alternating current that sub-product can be used directly.According to station capacity size, photovoltaic module array can be 20 one group (referred to as
Group string), the photovoltaic module array in large-sized photovoltaic power station can be more than 100,000 (packets).
The most what type of photovoltaic plant, construction side, operator and owner are required for accurately knowing the property of photovoltaic plant
Whether energy parameter, generated energy meet contract requirement.The alternative electric generation amount of photovoltaic plant can pass through power meter measures, now exchanges
Electrical network is as the load of photovoltaic generating system.But, photovoltaic plant main engineering part is photovoltaic module array, and it sends
It is DC high-voltage, no matter from engineering contract management view or the requirement of data accuracy, all can not with inverter ac also
The electrical power data of net substitute the DC generation data of the photovoltaic module array of DC side, it is necessary to additionally measure.Photovoltaic module battle array
The DC parameter of row is mainly open-circuit voltage, short circuit current and peak power output.Open-circuit voltage and short circuit current can be according to
Traditional method uses D.C. voltmeter and ammeter to measure, but peak power output measurement needs to be equipped with analog DC load.
And this ultrahigh-power DC loads due to volume, weight in putting into practice, desert photovoltaic plant can not be transported to on-the-spot (husky
Desert or mountain top), the roof in distributed photovoltaic power station can not be transported to, therefore, the DC generation characteristic of photovoltaic module array needs
Employing specific process is measured.
At present, international standard IEC60904-2 recommends the measurement of electric capacity charging method.Had Japan, Italy and
Certain university research domestic and be proposed the measuring instrument using this measuring method.But, the instrument of this kind of operation principle exists
Problems with:
(1) power measurement scope is the least, can only measure 10kW；
(2) voltage-current curve function (dynamic parameter) can only be measured；And this electric capacity charge and discharge that international standard is recommended
Electrical measurement principle is voltage-current curve function due to measurement result, belongs to non SI units system (SI units), at China's mesh
Before be also not set up corresponding calibration and magnitude tracing system；The instrument of the most this kind of operation principle can't measure school at present
Standard, therefore, data can cause queries even contract dispute;
(3) current measuring instrument all uses industrial control computer to carry out controlling of sampling, and liquid crystal touch screen operates, practice
Showing, in the open Work places, it is unclear that strong sunlight illumination makes liquid crystal display screen data differentiate, and electrical source consumption is bigger than normal, removes
Non-selection specific battery, is otherwise difficult to work a whole day.
Thus prior art could be improved and improve.
Summary of the invention
In place of above-mentioned the deficiencies in the prior art, it is an object of the invention to provide a kind of photovoltaic module array direct current and send out
The measuring instrument of electrical characteristics and measuring method thereof, be used for measuring solar photovoltaic generation system photovoltaic module array DC generation special
Property, increase power measurement scope, and by the maximum recorded under the conditions of the on-the-spot peak power recorded release laboratory standard
Power, has good popularizing application prospect.
In order to achieve the above object, this invention takes techniques below scheme:
The measuring instrument of a kind of photovoltaic module array DC generation characteristic, is used for measuring light in solar photovoltaic generation system
The DC generation characteristic of photovoltaic assembly array, wherein, described measuring instrument includes a body, and described body is provided with chain of command
Plate, described the internal static measuring devices being provided with for measuring Open Output Voltage and short-circuit output current and for surveying
The dynamic measurement device of amount I-E characteristic；Farther include on described control panel for selecting to measure output electricity of opening a way
Pressure, short-circuit output current or the functional select switch of I-E characteristic；
Described functional select switch is connected with static measuring devices and dynamic measurement device.
The measuring instrument of described photovoltaic module array DC generation characteristic, wherein, described static measuring devices includes:
Double aobvious digital voltage-ammeters, it is 0-1000Vdc that its open-circuit voltage measures scope；Short circuit current measurement scope
For 0-200Adc.
The measuring instrument of described photovoltaic module array DC generation characteristic, wherein, described dynamic measurement device includes:
High direct voltage capacitor and for the voltage and current that gathers in charging process on high direct voltage capacitor in time
The data acquisition unit of change.
The measuring instrument of described photovoltaic module array DC generation characteristic, wherein, described internal is additionally provided with two tunnels
Charge circuit, wherein, a road be capacitance be the high power capacity charge circuit of 3400 μ F；Another road is the low capacity charging of 500 μ F
Loop.
The measuring instrument of described photovoltaic module array DC generation characteristic, wherein, described internal is provided with warning dress
Put, described control panel is provided with corresponding sound/light siren；Described alarm device is connected with sound/light siren.
The measuring instrument of described photovoltaic module array DC generation characteristic, wherein, described internal is additionally provided with two merits
Rate switchs, and it connects the positive and negative input circuit of tested photovoltaic array component respectively；Each power switch relay the most in parallel is opened
Close.
The measuring instrument of described photovoltaic module array DC generation characteristic, wherein, described body also has one outside
Storage device connector, described External memory equipment connector is connected with data acquisition unit.
The measuring instrument of described photovoltaic module array DC generation characteristic, wherein, also includes an external lighium polymer
Battery.
A kind of measuring method of the measuring instrument of above-mentioned photovoltaic module array DC generation characteristic, wherein, including:
According to the control instruction of user, the functional select switch on control panel selects to measure Open Output Voltage, short circuit
Output electric current or I-E characteristic；The most corresponding static measuring devices measures Open Output Voltage and short circuit output
Electric current；Dynamic measurement device measures I-E characteristic.
The measuring method of the measuring instrument of described photovoltaic module array DC generation characteristic, wherein, described kinetic measurement
Measurement device I-E characteristic specifically includes:
Filled with certain acquisition rate collection to DC high-voltage condenser charge, data acquisition unit by photovoltaic module array
In electric process, the voltage on capacitor, electric current change over, and draw the time function relation of correspondence, then, by data acquisition
Each time point voltage that storage obtains carries out coordinate transform with functional relationship and the functional relationship of electric current and time of time,
It is converted into the functional relationship of output voltage and output electric current, i.e. I-E characteristic.
The measuring method of the measuring instrument of described photovoltaic module array DC generation characteristic, wherein, also includes: by existing
The peak power that the peak power that field records records under the conditions of releasing laboratory standard.
Compared to prior art, the measuring instrument of the photovoltaic module array DC generation characteristic that the present invention provides and measurement thereof
Method, is used for measuring solar photovoltaic generation system photovoltaic module array DC generation characteristic, wherein, described photovoltaic module array
The measuring instrument of DC generation characteristic includes: a body, and described body is provided with control panel, and described internal is provided with
For measuring the static measuring devices of Open Output Voltage and short-circuit output current and for measuring the dynamic of I-E characteristic
Measurement apparatus.Open Output Voltage, short-circuit output current, maximum output is obtained in use by static measurement and kinetic measurement
Power, activity coefficient and the voltage and current of generation maximum power point.Which increase power measurement scope, and surveyed by scene
The peak power that the peak power obtained records under the conditions of releasing laboratory standard, has good popularizing application prospect.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of direct current light photovoltaic generating system.
Fig. 2 is the schematic diagram of DC-AC electricity generation system.
The intrinsic knot of the measuring instrument of the photovoltaic module array DC generation characteristic that Fig. 3 provides for the embodiment of the present invention
Structure and signal schematic representation.
The control panel of the measuring instrument of the photovoltaic module array DC generation characteristic that Fig. 4 provides for the embodiment of the present invention
Schematic surface.
Detailed description of the invention
The present invention provides measuring instrument and the measuring method thereof of a kind of photovoltaic module array DC generation characteristic, for making this
Bright purpose, technical scheme and effect are clearer, clear and definite, and the embodiment that develops simultaneously referring to the drawings is the most detailed to the present invention
Explanation.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The invention provides the measuring instrument of a kind of photovoltaic module array DC generation characteristic, be used for measuring photovoltaic
The DC generation characteristic of photovoltaic module array in electricity generation system, wherein, described measuring instrument includes a body, and described body sets
It is equipped with control panel, described the internal static measurement dress being provided with for measuring Open Output Voltage and short-circuit output current
Put and for measuring the dynamic measurement device of I-E characteristic；Farther include on described control panel for selecting measurement
Functional select switch (itself and the intrinsic function in Fig. 2 of Open Output Voltage, short-circuit output current or I-E characteristic
Selector 10 is corresponding)；Described functional select switch is connected with static measuring devices and dynamic measurement device.
For body, as it is shown on figure 3, described static measuring devices takes traditional electric measurement method, with 0.5% precision
Open Output Voltage Voc and the short-circuit output current of photovoltaic module array directly measured by double aobvious digital voltage-ammeters 100
Isc, it is 0-1000Vdc that open-circuit voltage measures scope；Short circuit current measurement scope is 0-200Adc, wherein, and the short circuit electricity of 10A
Stream uses double aobvious digital voltage-ammeter 100 directly to measure, 50A and 200A bis-gear uses the 10m Ω of custom-made accurate
Big current sampling resistor 210, is read on this sample resistance 210 by another digital voltmeter (the i.e. second digital voltmeter) 200
Voltage drop, and directly given tested current value by described second digital voltmeter 200.Owing to DC voltage and DC current are state
Border SI units, China establish already perfect, can be with the magnitude tracing system of international benchmark comparison, therefore, this instrument warp
After crossing calibration, the data of reading can be traceable to iu (SI), the most necessarily obtains all parties to contract's recognition and acceptance.
Described dynamic measurement device adopt international standards IEC60904-2 recommend electric capacity charging measuring principle.Adopt with other
Different by the measuring principle of industrial computer, this instrument uses data acquisition unit and special-purpose software to measure the I-V spy of photovoltaic generating system
Property, including the activity coefficient F.F. of Open Output Voltage Voc, short-circuit output current Isc and peak power output Pm and derivation
Deng totally 6 parameters.Its measuring principle is: make photovoltaic module array high direct voltage capacitor 300 in instrument charge, data acquisition
Voltage, electric current that storage 400 gathers in charging process on high direct voltage capacitor 300 with the acquisition rate of 4096kB become in time
Change, and draw the time function relation of correspondence.Obviously, when charging just starts, owing to also not having on high direct voltage capacitor 300
Electric charge, now available maximum charging current, i.e. short circuit current Isc.Equally, at the end of charging process, charging current is
Through for 0, now obtain the VD of maximum, i.e. open-circuit voltage Voc, then data acquisition unit 400 is obtained each
The functional relationship of the functional relationship of time point voltage and time and electric current and time carries out coordinate transform, namely voltage-
Time function V ∝ t and current-vs-time function I ∝ t is converted into the functional relationship of output voltage and output electric current, i.e. I ∝ V
Characteristic, and derivation includes peak power output Pm, and the voltage Vpm and electric current Ipm of generation maximum power point further, and
Activity coefficient F.F..
As it has been described above, record 6 parameters belong to dynamic parameter, it is impossible to learn the accurate of dynamic parameter by instrument calibration
Property, but, traditional voltage, current instruments through calibration due to this apparatus preparation, user can pass through static number
Compare according to dynamic data, be modified according to the internal relation between each data, namely by the static state of calibration
Data extrapolate peak power and activity coefficient.
Further, the fieldtesting results of photovoltaic module array peak power output depends on on-the-spot sunlight irradiation merit
Rate, irradiation angle conditions and ambient temperature, the peak power causing scene to record records under the conditions of laboratory standard
High-power misfit, also misfit with the dispatch from the factory maximum power value of institute's nominal of cell panel, often result in contract dispute.This instrument
Add the actual peak power data recorded at scene for this and calculate test chamber standard conditions (STC) or factory calibration condition
Under the function of peak power output.The output of this function DC characteristic based on the data acquisition unit used and sunlight irradiation
Degree becomes positive linear relationships within the specific limits；Negative linear relationship is become with sample surface temperature based on photovoltaic battery panel output.
During test, as long as the irradiance reading that known or this instrument are given and sample surface temperature reading are input to test in software
Corresponding window in, software will provide the peak power output calculated under standard conditions automatically.Calculate the irradiance of power
Data that the factor and temperature coefficient are generally acknowledged based on photovoltaic industry and with reference to international standard and document, such as, for crystalline silicon light
Volt cell panel ,-0.48% every degree Celsius.Client can also carry sunlight irradiation degree instrument and thermometer voluntarily, and by measurement
Irradiance and temperature data are inserted in software correlation window, draw the peak power under the conditions of STC.
Further, in order to obtain dynamic data accurately, harvester needs to read after entering stable state charging process
Data, namely need to choose the suitable charging interval.Time is too short, and time scale shared by initial labile state is excessive, has
Effect data deficiencies, can affect data accuracy；Overlong time, just may require that charging capacitor capacity is sufficiently large, causes instrument volume
Excessive and preponderance, loses the due feature of portable instrument.Through Comparability test repeatedly, the charging interval is chosen to be 5ms-
Between 30ms proper.Consider this instrument minimum and measure monolithic battery plate 250W(50V, 5A) and large-scale desert light
Overhead utility wide-measuring range about 200kW(900V, 200A) measurement area requirement, the most wide in range charging current and voltage,
The charging interval required will be the most wide in range.To this end, as it is shown on figure 3, high direct voltage capacitor 300 is designed as two tunnels charges back
Road, a road be capacitance be the high power capacity charge circuit of 3400 μ F, it is adaptable to electric current photovoltaic generating system high-power, big, such as
Photovoltaic plant；Also a road is the low capacity charge circuit of 500 μ F, it is adaptable to small-power, low current photovoltaic generating system, such as
Distribution photovoltaic plant.
Owing to photovoltaic battery panel belongs to constant current output, with open-circuit voltage 500V, maximum current 200A, minimum current 10A is
Example, can be by formulaCalculate the charging interval of two charge circuits:
It addition, the DC current of photovoltaic plant output depends not only on the power designs of photovoltaic plant, also depend on the sun
The irradiance of light.Nominal value be the cell panel of 8A when morning or illumination deficiency in afternoon, output electric current may be reduced to 2A, this
Time, the charging interval of 25ms will extend to 100ms, and this charging interval still falls within suitable time range.On this instrument design
Manually selected between high power capacity or two charge circuits of low capacity by panel-switch by operator.
It addition, in addition to rationally selecting the charging interval, appropriate design sample resistance is also directly connected to the accuracy of instrument.
The voltage drop being serially connected on the sample resistance of charge circuit is constant, and the charging voltage on capacitor is with charging interval line
Property increase, if constant voltage opposite linear increase voltage exceed certain proportion, the linearity of charging voltage will be affected.This
Instrument is suitable for current range from 10A-200A, if selecting single sample resistance, for big electric current, can due to resistance bigger than normal and
Constant voltage ratio is excessive, and influence curve is non-linear；For small area analysis, again can be due to resistance measurement data signals less than normal and useful
Compare background noise the most weak, affect data accuracy, it is necessary in the widest range, rationally select sample resistance.This measurement
Use three grades of sample resistances on instrument design, correspond respectively to 10A small area analysis shelves, current gear in 50A, the big current gear of 200A.By
Operator are selected, as shown in Figure 4 by control panel switch.
Further, in order to avoid burning sample resistance because of careless manipulation, this instrument have also been devised big electric current warning merit
Can, when being placed in 200A shelves, without correctly selecting sample resistance, board (i.e. control panel) can send sound, light alarm,
Reminding operator appropriately selected, when static sample resistance temperature is too high, temperature controller can cut off measurement loop, and temperature is replied normal
After, can again reset.Take above-mentioned measure, this instrument scope of application and data accuracy, resolution can be made to be greatly improved, no
It is only applicable to powerful desert power station, is also applied for distributed, roof type middle low power power station, even can be used for monolithic photovoltaic
The test of cell panel.
Further, as it is shown on figure 3, the measuring instrument of this photovoltaic module array DC generation characteristic is connecting by light-metering
The positive and negative input circuit of photovoltaic array assembly is respectively arranged a high power switch (as it is shown on figure 3, the i.e. first test switch 510 and the
Two test switches 520), and redundant parallel relay switch (i.e. first relay 610 and the second relay 620), its mesh
Be this instrument floating ground measurement, no matter manual measurement, or automatically measure, all will ensure that over the ground for+900V or over the ground-
The high pressure of 900V is simply starting the test moment measurement loop by instrument, it is ensured that the personal safety of operator.
Further, as it is shown on figure 3, also have an External memory equipment connector 710(such as USB on described body
Connector), described External memory equipment connector 710 is connected with data acquisition unit 400.Photovoltaic module array DC generation characteristic
Measuring instrument static parameter need not connect computer, as long as being measuring instrument when measuring (measure open-circuit voltage and short circuit current)
Device connects external dc power.For convenience of measuring, can the data of measurement be stored on USB by harvester, permissible
After measurement terminates, read and process data (client's selection).This measuring instrument dynamic parameter measurement (measure open-circuit voltage Voc and
Short circuit current Isc peak power output Pm, and produce the voltage Vpm and electric current Ipm of maximum power point, and calculate accordingly and fill out
Fill coefficient F.F.) time, needing to connect notebook computer, read, process and preserve the data that harvester obtains, this measurement need not
Powering for instrument, notebook computer is that harvester is powered by USB data line.
Although it addition, the instrument that this instrument consumes electricity ratio industrial computer and LCDs mode is substantially little, it is contemplated that
Ensure the activity duration of on-the-spot one day, it is still necessary to use the battery that capacity is sufficiently large.This instrument selection 16000mA/12V-16V-
The high-capacity lithium ion battery polymer battery of 19V, design uses external mode, can show the surplus of lithium polymer battery after connecting instrument
Remaining voltage.On the one hand the mode of this plug-in power supply guarantees that portable instrument carries and the safety in transportation in aviation, separately
On the one hand having decomposed the weight of this instrument, meanwhile, this battery can also charge for notebook computer.
Present invention also offers the measuring method of the measuring instrument of a kind of above-mentioned photovoltaic module array DC generation characteristic,
Comprising:
According to the control instruction of user, the functional select switch on control panel selects to measure Open Output Voltage, short circuit
Output electric current or I-E characteristic；The most corresponding static measuring devices measures Open Output Voltage and short circuit output
Electric current；Dynamic measurement device measures I-E characteristic.
Further, in the measuring method of the measuring instrument of described photovoltaic module array DC generation characteristic, described dynamic
State measurement apparatus is measured I-E characteristic and is specifically included:
Filled with certain acquisition rate collection to DC high-voltage condenser charge, data acquisition unit by photovoltaic module array
In electric process, the voltage on capacitor, electric current change over, and draw the time function relation of correspondence, then, by data acquisition
Each time point voltage that storage obtains carries out coordinate transform with functional relationship and the functional relationship of electric current and time of time,
It is converted into the functional relationship of output voltage and output electric current, i.e. I-E characteristic.It addition, also include: recorded by scene
The peak power that peak power records under the conditions of releasing laboratory standard.
In sum, the measuring instrument of the photovoltaic module array DC generation characteristic that the present invention provides and measuring method thereof,
It is used for measuring solar photovoltaic generation system photovoltaic module array DC generation characteristic, wherein, described photovoltaic module array direct current
The measuring instrument of power generation characteristics includes: a body, and described body is provided with control panel, described internal be provided with for
Measure Open Output Voltage and the static measuring devices of short-circuit output current and for measuring the kinetic measurement of I-E characteristic
Device.Open Output Voltage, short-circuit output current, maximum work output is obtained in use by static measurement and kinetic measurement
Rate, activity coefficient and the voltage and current of generation maximum power point.Which increase power measurement scope, and recorded by scene
Peak power release the peak power recorded under the conditions of laboratory standard, there is good popularizing application prospect.
It is understood that for those of ordinary skills, can be according to technical scheme and send out
Bright design in addition equivalent or change, and all these change or replace the guarantor that all should belong to appended claims of the invention
Protect scope.
Claims (8)
1. a measuring instrument for photovoltaic module array DC generation characteristic, is used for measuring photovoltaic in solar photovoltaic generation system
The DC generation characteristic of assembly array, it is characterised in that described measuring instrument includes a body, and described body is provided with control
Panel, described the internal static measuring devices being provided with for measuring Open Output Voltage and short-circuit output current and for
Measure the dynamic measurement device of I-E characteristic；Described dynamic measurement device includes: high direct voltage capacitor and be used for gathering
The time dependent data acquisition unit of voltage and current on high direct voltage capacitor in charging process；Described internal also sets up
Have two road charge circuits, wherein, a road be capacitance be the high power capacity charge circuit of 3400 μ F；Another road is the little Rong of 500 μ F
Amount charge circuit；
Farther include on described control panel for selecting measurement Open Output Voltage, short-circuit output current or current-voltage
The functional select switch of characteristic；Described functional select switch is connected with static measuring devices and dynamic measurement device；
The time of described data acquisition unit reading data is between the 5ms-30ms after charging process starts.
The measuring instrument of photovoltaic module array DC generation characteristic the most according to claim 1, it is characterised in that described quiet
State measurement apparatus includes:
Double aobvious digital voltage-ammeters, it is 0-1000Vdc that its open-circuit voltage measures scope；Short circuit current measurement scope is 0-
200Adc。
The measuring instrument of photovoltaic module array DC generation characteristic the most according to claim 1, it is characterised in that described
The internal alarm device that is provided with, described control panel is provided with corresponding sound/light siren；Described alarm device and sound/light
Siren is connected.
The measuring instrument of photovoltaic module array DC generation characteristic the most according to claim 1, it is characterised in that described
Internal being additionally provided with two power switch, it connects the positive and negative input circuit of tested photovoltaic array component respectively；Each power switch is equal
A relay switch in parallel.
The measuring instrument of photovoltaic module array DC generation characteristic the most according to claim 1, it is characterised in that described
Also having an External memory equipment connector on body, described External memory equipment connector is connected with data acquisition unit.
The measuring instrument of photovoltaic module array DC generation characteristic the most according to claim 1, it is characterised in that also include
One external lithium polymer battery.
7. a measuring method for the measuring instrument of the photovoltaic module array DC generation characteristic described in claim 1, its feature
It is, including:
According to the control instruction of user, the functional select switch on control panel selects to measure Open Output Voltage, short circuit output
Electric current or I-E characteristic；The most corresponding static measuring devices measures Open Output Voltage and short-circuit output current；
Dynamic measurement device measures I-E characteristic.
The measuring method of the measuring instrument of photovoltaic module array DC generation characteristic the most according to claim 7, its feature
Being, described dynamic measurement device is measured I-E characteristic and is specifically included:
Charged with certain acquisition rate collection to DC high-voltage condenser charge, data acquisition unit by photovoltaic module array
In journey, the voltage on capacitor, electric current change over, and draw the time function relation of correspondence, then, by data acquisition unit
Each time point voltage obtained carries out coordinate transform with functional relationship and the functional relationship of electric current and time of time, conversion
Become the functional relationship of output voltage and output electric current, i.e. I-E characteristic.
Priority Applications (1)
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