CN107831346A - A kind of method and device of photovoltaic array DC output power analog power - Google Patents

A kind of method and device of photovoltaic array DC output power analog power Download PDF

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Publication number
CN107831346A
CN107831346A CN201710895353.6A CN201710895353A CN107831346A CN 107831346 A CN107831346 A CN 107831346A CN 201710895353 A CN201710895353 A CN 201710895353A CN 107831346 A CN107831346 A CN 107831346A
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China
Prior art keywords
output
power
curves
control module
change
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Pending
Application number
CN201710895353.6A
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Chinese (zh)
Inventor
胡慧武
李俊兵
杜亮
王鹏程
张伟伟
杨堰青
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Hangzhou Top Network Technology Co Ltd
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Hangzhou Top Network Technology Co Ltd
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Priority to CN201710895353.6A priority Critical patent/CN107831346A/en
Publication of CN107831346A publication Critical patent/CN107831346A/en
Pending legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/28—Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
    • H02J3/383—
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
    • H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/539—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency
    • 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
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Electrical Variables (AREA)

Abstract

The invention discloses a kind of method and device of photovoltaic array DC output power analog power, according to actual weather conditions, the PV curves of output of changed power under several weather are simulated, with the power output analog power of change；Described device includes power coefficient control module and Current Voltage output module, described Current Voltage output module one end is connected with power coefficient control module, Current Voltage can be simulated accordingly according to the PV curves of output model that power coefficient control module provides, the other end is connected with electrical equipment, electrical equipment can be powered with the power output of change.Pass through this programme, simulate under common weather condition, the variation characteristic of solar radiation intensity, the DC output power of output simulation photovoltaic array, power electrical apparatus to photovoltaic system, detecting electric equipment whether normal work, the operation troubles rate of photovoltaic system electrical equipment can be greatly reduced, reduce system later stage O＆M cost.

Description

A kind of method and device of photovoltaic array DC output power analog power
Technical field
The invention belongs to solar photovoltaic generation system field, more particularly to a kind of photovoltaic array DC output power to simulate The method and device of power supply.
Background technology
Existing local-style dwelling houses photovoltaic system, usually belong to below 20KW small-sized solar photovoltaic generating system, system master To include the photovoltaic array installed in local-style dwelling houses roof, and necessary electrical equipment such as inverter, data acquisition unit and grid-connection cabinet Deng.The power output P of wherein photovoltaic array is mainly influenceed by the change of temperature and local irradiation intensity.For photovoltaic hair some day For electricity, from solar radiation at sunrise produce can start inverter work to solar radiation be not enough to start inverter work This period is the effective time, and typically between 5-10 DEG C, influence of the temperature to PV curves of output can be with for the change of temperature Ignore, mainly consider influence of the local irradiation intensity to PV curves of output, it is input voltage to be embodied on PV curves Constant, power output P is adjusted for only curent change.And from the point of view of the temperature change of a year and a day degree, the change model of temperature It is trapped among between -20 DEG C -+80 DEG C, is embodied on PV curves as input voltage and input current while changes.For actual day The outstanding model of no one of situation, prior art of gas change, the power output curve for carrying out analog power reach such as reality The state of border work.And the final stage typically before the production of the electrical equipments such as inverter, data acquisition unit and grid-connection cabinet is dispatched from the factory, It is required for being operated testing results.It is used for the analog power of above-mentioned test on the market now, is with a constant output mostly Curtage is tested, but such mode can not simulate the use environment of actual photovoltaic system, with actual change The weather condition of multiterminal differs greatly.And above-mentioned electrical equipment needs to be transported in user family from supplier, ability after installation Trial operation is carried out, judges whether electrical equipment runs rationally, when this test mode has uncertain height, more exchange device in itself Between long and cost of labor it is high the shortcomings that.
The content of the invention
In order to solve the above problems, of the invention first purpose is to provide a kind of photovoltaic array DC output power simulation The method of power supply, to simulate the DC output power change curve of photovoltaic array under actual working environment；Second of the present invention Purpose is to provide a kind of device of photovoltaic array DC output power analog power, and analog power can simulate actual working environment To power electrical apparatus, and then matching test is carried out before electrical equipment dispatches from the factory.
In order to reach first purpose of the present invention, adopt the following technical scheme that：A kind of photovoltaic array direct current output work( The method of rate analog power, it is characterised in that using following steps：
Step 1）The coefficient 1.0 on the basis of Jiao of power output 4,800,000,000, it is determined that local irradiation intensity G constant interval is 0.9- 1.8；
Step 2）Inverter power is selected, sets power supply peak power output value, the power supply peak power output value is inversion 1.1 times of device；
Step 3）The weather conditions occurred according to actual capabilities, simulate the PV curves of output of changed power under several weather；Institute Stating the PV curves of output of changed power under several weather includes the PV curves of output in fine day, rainy days, broken sky and extreme day, Wherein a）Fine day：PV curves of output are normal distribution curve, power output and local irradiation level G positive correlations, peak power output For nG KW/ m2, wherein n is 0-1；b）Rainy days：PV curves of output are flat normal distribution curve, power output and locality Irradiation level G positive correlations, peak power output are 0.2nG KW/ m2, n is 0-1；c）Broken sky：PV curves of output are triangular wave Curve, power output and local irradiation level G positive correlations, peak power output is 0.7nG KW/m2, n is 0-1；d）Extreme day： PV curves of output are continuous 15 triangular wave curves, power output and local irradiation level G positive correlations, peak power output nG KW/ m2, n is 0-1；
Step 4）According to step 3）The PV curves of output listed, with the power output analog power of change.
Further, the range of temperature of degree in the whole year is between -20 DEG C -+80 DEG C, the change of temperature in PV curves of output Changed simultaneously by the input voltage and input current of power supply, voltage is in 0.7-1 perunit value changes；Output power of power supply from 0- 1.1 perunit value changes.
In order to reach second object of the present invention, adopt the following technical scheme that：A kind of photovoltaic array direct current output work( The device of rate analog power, it is characterised in that：Described device includes power coefficient control module and Current Voltage output module, its In, the power coefficient control module stores the PV curve of output models of changed power under several weather, can control direct current The change of power output；Described Current Voltage output module one end is connected with power coefficient control module, can be according to power train The PV curves of output model that number control module provides is simulated accordingly to Current Voltage, and the other end is connected with electrical equipment, Electrical equipment can be powered with the power output of change.
By this programme, simulate under common weather condition, the variation characteristic of solar radiation intensity, output simulation photovoltaic The DC output power of array, to the power electrical apparatus of photovoltaic system, detecting electric equipment whether normal work, can be significantly The operation troubles rate of photovoltaic system electrical equipment is reduced, reduces system later stage O＆M cost.Specifically, weather can be directed to become The actual conditions of change, there is provided a kind of photovoltaic array DC output power analog power, the power output curve for carrying out analog variation reach To the state such as real work, the analog power of this method, it is to be changed completely according to actual weather conditions and set, has There is the effect of more closer to reality use state.And typically produced in electrical equipments such as inverter, data acquisition unit and grid-connection cabinets Final stage before dispatching from the factory, it is required for being operated testing results, can be quick and easy by the simulation power supply device of this programme Judge whether electrical equipment runs rationally, also improve efficiency while saving substantial amounts of manpower and materials.
Brief description of the drawings
Fig. 1 is the PV curves of output of fine day of the present invention.
Fig. 2 is the PV curves of output of rainy days of the invention.
Fig. 3 is the PV curves of output of broken sky of the present invention.
Fig. 4 is the PV curves of output in the extreme day of the present invention.
Embodiment
The present embodiment is a kind of method of photovoltaic array DC output power analog power, using following steps：
Step 1）The coefficient 1.0 on the basis of Jiao of power output 4,800,000,000, it is determined that local irradiation intensity G constant interval is 0.9- 1.8；
Step 2）Inverter power is selected, sets power supply peak power output value, the power supply peak power output value is inversion 1.1 times of device；
Step 3）The weather conditions occurred according to actual capabilities, simulate the PV curves of output of changed power under several weather；Institute Stating the PV curves of output of changed power under several weather includes the PV curves of output in fine day, rainy days, broken sky and extreme day, Referring to accompanying drawing 1-4, abscissa is time T in figure, and ordinate is power P；Wherein a）Fine day：PV curves of output are that normal distribution is bent Line, power output and local irradiation level G positive correlations, peak power output is nG KW/ m2, wherein n is 0-1；b）Rainy days： PV curves of output are flat normal distribution curve, power output and local irradiation level G positive correlations, peak power output 0.2nG KW/ m2, n is 0-1；c）Broken sky：PV curves of output are triangular wave curve, power output and local irradiation level G positive correlations, most Big power output is 0.7nG KW/ m2, n is 0-1；d）Extreme day：PV curves of output are continuous 15 triangular wave curves, output Power and local irradiation level G positive correlations, peak power output is nG KW/ m2, n is 0-1；
Step 4）According to step 3）The PV curves of output listed, with the power output analog power of change.
The whole year degree range of temperature between -20 DEG C -+80 DEG C, the change of temperature is by power supply in PV curves of output Input voltage and input current change simultaneously, and voltage is in 0.7-1 perunit value changes；Output power of power supply from 0-1.1 perunit values Change.
According to a kind of device of photovoltaic array DC output power analog power of the above method, described device includes power Coefficient control module and Current Voltage output module, wherein, the power coefficient control module stores power under several weather The PV curve of output models of change, can control the change of DC output power；Described Current Voltage output module one end and work( Rate coefficient control module connects, and Current Voltage can be carried out according to the PV curves of output model that power coefficient control module provides Corresponding simulation, the other end are connected with electrical equipment, electrical equipment can be powered with the power output of change.

Claims (3)

  1. A kind of 1. method of photovoltaic array DC output power analog power, it is characterised in that using following steps：
    Step 1）The coefficient 1.0 on the basis of Jiao of power output 4,800,000,000, it is determined that local irradiation intensity G constant interval is 0.9- 1.8；
    Step 2）Inverter power is selected, sets power supply peak power output value, the power supply peak power output value is inversion 1.1 times of device；
    Step 3）The weather conditions occurred according to actual capabilities, simulate the PV curves of output of changed power under several weather；Institute Stating the PV curves of output of changed power under several weather includes the PV curves of output in fine day, rainy days, broken sky and extreme day, Wherein a）Fine day：PV curves of output are normal distribution curve, power output and local irradiation level G positive correlations, peak power output For nG KW/ m2, wherein n is 0-1；b）Rainy days：PV curves of output are flat normal distribution curve, power output and locality Irradiation level G positive correlations, peak power output are 0.2nG KW/ m2, n is 0-1；c）Broken sky：PV curves of output are triangular wave Curve, power output and local irradiation level G positive correlations, peak power output is 0.7nG KW/m2, n is 0-1；d）Extreme day： PV curves of output are continuous 15 triangular wave curves, power output and local irradiation level G positive correlations, peak power output nG KW/ m2, n is 0-1；
    Step 4）According to step 3）The PV curves of output listed, with the power output analog power of change.
  2. 2. according to a kind of method of photovoltaic array DC output power analog power described in claim 1, it is characterised in that：It is whole Year range of temperature between -20 DEG C -+80 DEG C, in PV curves of output the change of temperature by power supply input voltage and Input current changes simultaneously, and voltage is in 0.7-1 perunit value changes；Output power of power supply from 0-1.1 perunit value changes.
  3. A kind of 3. device of photovoltaic array DC output power analog power, it is characterised in that：Described device includes power coefficient Control module and Current Voltage output module, wherein, the power coefficient control module stores changed power under several weather PV curve of output models, the change of DC output power can be controlled；Described Current Voltage output module one end and power train Number control module connection, Current Voltage can be carried out according to the PV curves of output model that power coefficient control module provides corresponding Simulation, the other end is connected with electrical equipment, electrical equipment can be powered with the power output of change.
CN201710895353.6A 2017-09-28 2017-09-28 A kind of method and device of photovoltaic array DC output power analog power Pending CN107831346A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114050787A (en) * 2021-11-19 2022-02-15 山东理工大学 Solar photovoltaic power generation assembly fault on-line detection device and detection method thereof

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CN104731143A (en) * 2013-12-18 2015-06-24 西安信唯信息科技有限公司 Power supply device simulating photolytic module characters
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114050787A (en) * 2021-11-19 2022-02-15 山东理工大学 Solar photovoltaic power generation assembly fault on-line detection device and detection method thereof
CN114050787B (en) * 2021-11-19 2024-04-09 山东理工大学 Solar photovoltaic power generation assembly fault online detection device and detection method thereof

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