CN104731143A - Power supply device simulating photolytic module characters - Google Patents
Power supply device simulating photolytic module characters Download PDFInfo
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- CN104731143A CN104731143A CN201310697344.8A CN201310697344A CN104731143A CN 104731143 A CN104731143 A CN 104731143A CN 201310697344 A CN201310697344 A CN 201310697344A CN 104731143 A CN104731143 A CN 104731143A
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Abstract
The invention discloses a power supply device simulating photolytic module characters. The power supply device simulating the photolytic module characters is formed by a plurality of circuit portions; the main circuit portions comprise a power amplifying circuit and a control circuit portion; main power is formed by a transformer rectifying filtering unit and a main loop adjusting unit; the size of output voltage current is changed by adjusting the main loop unit; a control portion mainly determines a curve working point and sends waveform data to control the main loop adjust unit to change output of the power source by detecting output voltage of a power source and output currents. The power supply device simulating the photolytic module characters can automatically adjust the output of the power source according to the load change and display the photovoltaic module character curve and the load working point under certain temperature and illumination through a control panel.
Description
Technical field
The invention belongs to electric and electronic technical field, relate to a kind of switching power unit, be specifically related to a kind of supply unit of simulated light photovoltaic assembly characteristic.
Background technology
Solar photovoltaic technology is the generation technology converted solar energy into electrical energy based on photovoltaic effect, and the solar module utilizing microelectronic process engineering to make completes the work converted solar energy into electrical energy.This technology have not consumption of fossil fuels, non-environmental-pollution, reliability is high, the life-span is long, security performance is good, be applicable to decentralized power supply, expand energy convenient, with the advantage such as other power-supply systems are compatible.
Solar photovoltaic technology needs from inverter, direct current to be become industrial frequency AC, to adapt to numerous ac electric apparatus conditions of power supply.
Photovoltaic combining inverter is tested, need the input providing the direct supply of simulation photovoltaic generation as photovoltaic DC-to-AC converter, by changing the constrained input condition of tested photovoltaic combining inverter, its input end of Real-time Collection, the voltage of output terminal, current value, through suitable routine processes, obtain the result that tested photovoltaic combining inverter is tested.
Current tested photovoltaic DC-to-AC converter input end power supply generally adopts the way of stabilized voltage supply resistance in series to provide.This method can not measure photovoltaic DC-to-AC converter characteristic exactly, such as MPPT maximum power point tracking characteristic; The impact of the working environment parameter such as illumination, temperature change on the grid-connected characteristic of inverter can not be reflected exactly.Therefore need a kind of photovoltaic family curve generating means to simulate the solar panel electricity generation situation under varying environment condition.
The basis of photovoltaic generation is solar panel, carry out extensive generating and need a large amount of cell panel, floor area is very wide thus, again because solar panel generated energy is how many and external environment is closely related, and export and then change along with the change of load, therefore will carry out studying to photovoltaic products needs a large amount of funds.Certain achievement is achieved to the research of this respect abroad.
Traditional photovoltaic property simulator adopts the method for Switching Power Supply to improve power analog photovoltaic curve, the voltage that the circuit that this method is built exports has larger ripple, this device adopts the method connecing linear power supply after Switching Power Supply to reduce ripple, it is high that the output of this device has output voltage stabilization degree, ripple is little, power supply conversion efficiency advantages of higher.Waveform generating portion adopts the method for curve being carried out to four sections of matchings, recorded data is fitted to four sections of equations, only need adopt output end current and judge to belong to which interval, then can be realized the object of automatic regulation output by the method for tabling look-up, more easily realize.
Summary of the invention
The object of this invention is to provide a kind of simulated light photovoltaic assembly characteristic supply unit, it has very close to the output characteristics of photovoltaic module, can the change of preset output characteristic curve illumination simulation, assembly temperature change the output characteristics change caused, can experimental requirements to programme the advantages such as selection output characteristics.
The technical solution adopted in the present invention is, power frequency AC through 1, transformer isolation transformation, rectification, filtering, obtaining non-constant voltage DC for this device powers, through major loop adjustment unit 2, the voltage of voltage regulation V required for exporting at output terminal.
Application condition amplifying unit 3 is by the output voltage V of major loop adjustment unit and compared by benchmark forming unit 8 output terminal reference voltage V F, its error sends into the control end of major loop adjustment unit 2 by negative feedback, thus makes output voltage V be stabilized to the numerical value of the expection relevant to reference voltage V F.
This device output terminal is connected to current sampling unit 7, and the signal of output current I converts digital quantity to by AD conversion unit 5 and sends into family curve control module 4.Family curve control module 4 checks the current segmenting belonging to current flow I, after the interpolation algorithm finding this section and correlation parameter, the digital value of the reference voltage V F of the correspondence of the output voltage V0 that estimated performance curve is expected, send into reference voltage forming unit 8, after converting reference voltage V F to by reference voltage forming unit 8, be added to the comparison input end of application condition amplifying unit 3, make application condition amplifying unit 3 produce error transfer factor signal feedback to major loop adjustment unit 2.Major loop adjustment unit 2 tracking error adjustment signal regulates it to output on the output voltage V0 of expection automatically.Through of short duration time delay to be output stable after, family curve control module 4 passes through AD conversion unit 5 through reference voltage forming unit 8, obtain current output voltage V in real time, compare with the output voltage V0 of the expection calculated, obtain error, when this error exceeds given range, suitable fine setting is made to VF; Until this error is in given scope.
Enter the circulation of next round dynamic conditioning subsequently.By running the circulation of this dynamic conditioning continuously, this device just can be made to run by the output characteristic curve preset.
Feature of the present invention is also, family curve control module 4 is made up of control module 9, display unit 10, instruction input unit 11, asynchronous serial port 12.Operator passes through asynchronous serial port 12 by instruction input unit 11 or upper PC, and instruction control unit 9 selects preset output characteristic curve as the foundation of current plant running, or arranges new output characteristic curve parameter, selects for during experiment later.
Feature of the present invention is also, reference voltage forming unit 8 forms main body by any type digital-to-analog conversion.
Beneficial effect of the present invention is, provide a kind of simulated light photovoltaic assembly characteristic supply unit, it has very close to the output characteristics of photovoltaic module, can preset curve, and illumination simulation change, assembly temperature changes the output characteristics caused and change; Program control selection output characteristics, adapts to the advantages such as the requirement of experiment.
Accompanying drawing explanation
Fig. 1 is the structural representation of the supply unit of a kind of simulated light photovoltaic assembly of the present invention characteristic;
In figure, 1. industrial frequency AC transformer current rectifying and wave filtering circuit, 2. major loop adjustment unit, 3. application condition amplifying unit, 4. family curve control module, 5.AD converting unit, 6. voltage sampling unit, 7. current sampling unit, 8. reference voltage forming unit.
Fig. 2 is the structural representation of family curve control module in the supply unit of a kind of simulated light photovoltaic assembly of the present invention characteristic.
In figure, 9. control module, 10. display module, 11. instruction input unit, 12. asynchronous serial port unit.
Embodiment
As shown in Figure 1, the supply unit of simulated light photovoltaic assembly characteristic, is characterized by: comprise power amplification circuit and control circuit, and described power amplification circuit at least comprises: AC transformation current rectifying and wave filtering circuit 1, major loop adjustment unit 2.The output of current rectifying and wave filtering circuit 1 is connected with major loop adjustment unit 2 input end, and the output terminal of major loop adjustment unit 2 is connected with the input end of voltage sampling unit 6; Described control circuit at least comprises voltage sampling unit 6, current sampling unit 7, AD conversion unit 5, control module 9, display module 10, reference voltage forming unit 4 and application condition amplifying unit 3.The output terminal of voltage sampling circuit 6 is connected with AD conversion unit 5 respectively with the output terminal of current sampling circuit 7, and AD conversion unit 5 is connected with family curve control module 4.The output terminal of family curve control module 4 is connected with the input end of reference voltage forming unit 8, major loop adjustment unit is connected with the input end of application condition amplifying unit with the output terminal of reference voltage forming unit 8, and the output terminal of application condition amplifying unit is connected with major loop adjustment unit 2.
As shown in Figure 1, family curve control module 4 mainly adopts master control core TMS320F2812, current sampling unit 7 sends into main control chip TMS320F2812 through AD conversion unit 5, find out the fit interval corresponding to solar property curve magnitude of voltage stored in chip, by carrying out voltage, current measurement to the solar panel at actual light photograph, temperature, after matlab modeling and simulating, carry out piecewise fitting, form four sections of fit interval, fit interval is divided by current value.Calculate and the magnitude of voltage corresponding to electric current according to fit equation, it can be used as the output voltage of voltage instruction value and major loop adjustment unit 2 after application condition amplifying unit 3, the magnitude of voltage exported after adjustment adjusts the output valve of major loop adjustment unit 2, makes output can real time modelling solar photovoltaic assembly family curve.
As shown in Figure 2, family curve control module 4 is made up of control module 9, display unit 10, instruction input unit 11, asynchronous serial port 12.Operator passes through asynchronous serial port 12 by instruction input unit 11 or upper PC, and instruction control unit 9 selects preset output characteristic curve as the foundation of current plant running, or arranges new output characteristic curve parameter, selects for during experiment later.
Claims (3)
1. the supply unit of a simulated light photovoltaic assembly characteristic, it is characterized by: comprise power amplification circuit and control circuit, described power amplification circuit at least comprises: industrial frequency AC transformer current rectifying and wave filtering circuit (1), major loop adjustment unit (2), and the output of industrial frequency AC transformer rectification filtering unit (1) is connected with major loop adjustment unit (2) input end, described control circuit at least comprises voltage sampling unit (6), current sampling unit (7), AD conversion unit (5), family curve control module (4), benchmark forming unit (8) and application condition amplifying unit (3), the output terminal of voltage sampling unit (6) is connected with AD conversion unit (5) respectively with the output terminal of current sampling unit (7), the output of AD conversion unit (5) is connected with family curve control module (4), the output of family curve control module (4) is connected with benchmark forming unit (8), major loop adjustment unit (2) is connected with application condition amplifying unit (3) with the output of benchmark forming unit (8).
2. the supply unit of a kind of simulated light photovoltaic assembly characteristic as claimed in claim 1, is characterized in that: described family curve control module (4) at least comprises: AD conversion unit (5), benchmark forming unit (8), instruction input unit (11), display module (10) and asynchronous serial port unit (12); The output of AD conversion unit (5) is connected with control module (9), and the output of control module (9) is connected with benchmark forming unit (8), and instruction input unit (11), display module (10), asynchronous serial port unit (12) are connected with control module (9).
3. the supply unit of a kind of simulated light photovoltaic assembly characteristic as claimed in claim 1, is characterized in that: the main control chip of the control module (9) of described family curve control module (4) adopts TMS320F2812.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310697344.8A CN104731143A (en) | 2013-12-18 | 2013-12-18 | Power supply device simulating photolytic module characters |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310697344.8A CN104731143A (en) | 2013-12-18 | 2013-12-18 | Power supply device simulating photolytic module characters |
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| CN104731143A true CN104731143A (en) | 2015-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310697344.8A Withdrawn CN104731143A (en) | 2013-12-18 | 2013-12-18 | Power supply device simulating photolytic module characters |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105897159A (en) * | 2016-04-08 | 2016-08-24 | 哈尔滨工业大学深圳研究生院 | High-efficiency solar simulator |
| CN107831346A (en) * | 2017-09-28 | 2018-03-23 | 杭州淘顶网络科技有限公司 | A kind of method and device of photovoltaic array DC output power analog power |
| CN109240398A (en) * | 2018-09-18 | 2019-01-18 | 深圳市航天新源科技有限公司 | Solar battery array simulator working point control type I-V outer loop control method |
-
2013
- 2013-12-18 CN CN201310697344.8A patent/CN104731143A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105897159A (en) * | 2016-04-08 | 2016-08-24 | 哈尔滨工业大学深圳研究生院 | High-efficiency solar simulator |
| CN105897159B (en) * | 2016-04-08 | 2018-01-23 | 哈尔滨工业大学深圳研究生院 | A kind of solar simulator |
| CN107831346A (en) * | 2017-09-28 | 2018-03-23 | 杭州淘顶网络科技有限公司 | A kind of method and device of photovoltaic array DC output power analog power |
| CN109240398A (en) * | 2018-09-18 | 2019-01-18 | 深圳市航天新源科技有限公司 | Solar battery array simulator working point control type I-V outer loop control method |
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Application publication date: 20150624 |