CN103746653A - DC analog power supply with characteristics of photovoltaic module - Google Patents
DC analog power supply with characteristics of photovoltaic module Download PDFInfo
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- CN103746653A CN103746653A CN201310721815.4A CN201310721815A CN103746653A CN 103746653 A CN103746653 A CN 103746653A CN 201310721815 A CN201310721815 A CN 201310721815A CN 103746653 A CN103746653 A CN 103746653A
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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
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- 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
Abstract
The invention relates to the technical field of photovoltaic power generation, especially to the technical field of a DC analog power supply with characteristics of a photovoltaic module. Problems existing in a present DC analog power supply, such as complex circuit and low power level, are solved. Starting from a simple circuit structure, curve analog of characteristics of the photovoltaic module is realized. The DC analog power supply is applied to performance test of a photovoltaic current transformer. The DC analog power supply provided by the invention is mainly composed of two parts, namely a main circuit and a control system. The main circuit adopts PWM rectifier topology and realizes the function of converting AC power to DC power. The control system is composed of an analog signal processing module, a digital signal processing module, a data communication interface, a power supply module and an algorithm processing module containing a core processing chip. Output of the DC analog power supply is controlled by reference to curve characteristics of the photovoltaic module, and it is ensured that direct voltage and direct current outputted by the DC analog power supply fit the characteristic curve of the photovoltaic module.
Description
Technical field
The present invention relates to photovoltaic power generation technology field, relate in particular to the DC simulation power technique fields that possesses photovoltaic module characteristic.
Background technology
Along with the development of photovoltaic current transformer, more and more higher to the test request of photovoltaic current transformer technical performance.Solar panel is as direct-current input power supplying, essential in test.But because solar panel cost is high, along with the rising of photovoltaic current transformer power grade, directly adopt solar panel as testing equipment, can greatly increase the research cost of photovoltaic current transformer.So there is successively in recent years possessing the DC simulation power supply of photovoltaic module characteristic, in order to analog solar cell panel.These DC simulation electric power main circuits adopt DC/DC converter topology more, control system complexity, and the power grade of single DC simulation power supply is low, is difficult to tackle the photovoltaic current transformer of current increasing power grade.In order to tackle high-power photovoltaic current transformer, be more at present the mode that adopts the parallel connection of multiple photovoltaic analog power, which makes integrated circuit complexity, to having relatively high expectations of parallel technology, has increased the cost of DC simulation power supply.
Summary of the invention
A kind of DC simulation power supply that possesses photovoltaic module characteristic, by main circuit and control system two parts, formed, it is characterized in that: control system is comprised of analog signals processing module (a), digital quantity signal processing module (b), data communication interface (c), power module (d) and algorithm processing module (e); Main circuit adopts PWM rectifier topology, interchange input side is connected to electrical network and gets AC energy, AC energy flows to AC/DC change-over circuit after by ac filter circuit filtering, AC/DC change-over circuit converts alternating current to direct current and exports to DC filtering circuit, by exporting to photovoltaic current transformer after DC filtering circuit filtering, uses.
Analog signals is crossed data communication interface (c) by analog signals processing module (a), switching value signal by digital quantity signal processing module (b), PERCOM peripheral communication information exchange and is flowed to algorithm processing module (e), algorithm processing module (e) is carried out analyzing and processing to these information, according to these information, with reference to photovoltaic module curve characteristic, DC simulation power supply is exported and controlled, guarantee the direct voltage of DC simulation power supply output and the characteristic curve of direct current matching photovoltaic module; The curve simulation algorithm of DC simulation power supply is that actual photovoltaic module characteristic curve is carried out to fitting a straight line according to 7 sections, and the broken line after matching and actual curve height are approximate, reaches the object of simulated light photovoltaic assembly output characteristic.
Analog signals is gathered by the transducer in main circuit, and the low-voltage signal after collection flows to analog signals processing module (a), and analog signals processing module (a) is carried out filtering, isolation, amplification processing to these information; In main circuit, the control of electric switch and feedback signal are connected to digital quantity signal processing module (b), digital quantity signal processing module (b) to these information isolate, level conversion processing; PERCOM peripheral communication information exchange is crossed the communications cable and is connected to data communication interface (c), and data communication interface (c) carries out protocol conversion by the communication information.Analog signals, digital quantity signal, PERCOM peripheral communication information are all delivered to algorithm processing module (e) after treatment.
Accompanying drawing explanation
Fig. 1 is a kind of DC simulation power-supply system block diagram that possesses photovoltaic module characteristic.
Fig. 2 is a kind of DC simulation power control system block diagram that possesses photovoltaic module characteristic.
Embodiment
As shown in Figure 1, the main circuit of described a kind of DC simulation power supply that possesses photovoltaic module characteristic adopts PWM rectifier topology, interchange input side is connected to electrical network and gets AC energy, AC energy flows to AC/DC change-over circuit after by ac filter circuit filtering, AC/DC change-over circuit converts alternating current to direct current and exports to DC filtering circuit, by exporting to photovoltaic current transformer after DC filtering circuit filtering, uses.
As shown in Figure 2, the control system of described a kind of DC simulation power supply that possesses photovoltaic module characteristic is comprised of analog signals processing module (a), digital quantity signal processing module (b), data communication interface (c), power module (d) and algorithm processing module (e).
Analog signals is crossed data communication interface (c) by analog signals processing module (a), switching value signal by digital quantity signal processing module (b), PERCOM peripheral communication information exchange and is flowed to algorithm processing module (e), algorithm processing module (e) is carried out analyzing and processing to these information, according to these information, with reference to photovoltaic module curve characteristic, DC simulation power supply is exported and controlled on the other hand, guarantee the direct voltage of DC simulation power supply output and the characteristic curve of direct current matching photovoltaic module.
Analog signals is gathered by the transducer in main circuit, and the low-voltage signal after collection flows to analog signals processing module (a), and analog signals processing module (a) is carried out filtering, isolation, amplification processing to these information; In main circuit, the control of electric switch and feedback signal are connected to digital quantity signal processing module (b), digital quantity signal processing module (b) to these information isolate, level conversion processing; PERCOM peripheral communication information exchange is crossed the communications cable and is connected to data communication interface (c), and data communication interface (c) carries out protocol conversion by the communication information.Analog signals, digital quantity signal, PERCOM peripheral communication information are all delivered to algorithm processing module (e) after treatment.Algorithm processing module (e) kernel processor chip adopts dsp chip, inner by the software programming analyzing and processing of realization to external information on the one hand at DSP, according to these information, with reference to the curve characteristic of photovoltaic module, DC simulation power supply is exported and controlled on the other hand, guarantee the direct voltage of DC simulation power supply output and the characteristic curve of direct current matching photovoltaic module.The curve simulation algorithm of DC simulation power supply is that actual photovoltaic module characteristic curve is carried out to fitting a straight line according to 7 sections, and the broken line after matching and actual curve height are approximate, reaches the object of simulated light photovoltaic assembly output characteristic.
The invention solves existing DC simulation power circuit complexity, the problem that power grade is low, from simple circuit structure, realizes the curve simulation to photovoltaic module characteristic, is applied to the performance test of photovoltaic current transformer.
Claims (3)
1. one kind possesses the DC simulation power supply of photovoltaic module characteristic, by main circuit and control system two parts, formed, it is characterized in that: control system is comprised of analog signals processing module (a), digital quantity signal processing module (b), data communication interface (c), power module (d) and algorithm processing module (e); Main circuit adopts PWM rectifier topology, interchange input side is connected to electrical network and gets AC energy, AC energy flows to AC/DC change-over circuit after by ac filter circuit filtering, AC/DC change-over circuit converts alternating current to direct current and exports to DC filtering circuit, by exporting to photovoltaic current transformer after DC filtering circuit filtering, uses.
2. a kind of DC simulation power supply that possesses photovoltaic module characteristic according to claim 1, it is characterized in that: analog signals is by analog signals processing module (a), switching value signal is by digital quantity signal processing module (b), PERCOM peripheral communication information exchange is crossed data communication interface (c) and is flowed to algorithm processing module (e), algorithm processing module (e) is carried out analyzing and processing to these information, according to these information, with reference to photovoltaic module curve characteristic, DC simulation power supply is exported and controlled, guarantee the direct voltage of DC simulation power supply output and the characteristic curve of direct current matching photovoltaic module, the curve simulation algorithm of DC simulation power supply is that actual photovoltaic module characteristic curve is carried out to fitting a straight line according to 7 sections, and the broken line after matching and actual curve height are approximate, reaches the object of simulated light photovoltaic assembly output characteristic.
3. a kind of DC simulation power supply that possesses photovoltaic module characteristic according to claim 1, it is characterized in that: analog signals is gathered by the transducer in main circuit, low-voltage signal after collection flows to analog signals processing module (a), and analog signals processing module (a) is carried out filtering, isolation, amplification processing to these information; In main circuit, the control of electric switch and feedback signal are connected to digital quantity signal processing module (b), digital quantity signal processing module (b) to these information isolate, level conversion processing; PERCOM peripheral communication information exchange is crossed the communications cable and is connected to data communication interface (c), data communication interface (c) carries out protocol conversion by the communication information, and analog signals, digital quantity signal, PERCOM peripheral communication information are all delivered to algorithm processing module (e) after treatment.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104506138A (en) * | 2014-12-24 | 2015-04-08 | 北京航空航天大学 | Device for simulating volt-ampere characteristic of solar cell |
| CN105529992A (en) * | 2016-01-15 | 2016-04-27 | 广西大学 | Simulator capable of simulating output characteristics of photovoltaic module under any working condition |
| CN105743438A (en) * | 2014-12-08 | 2016-07-06 | 上海航天有线电厂有限公司 | PV direct current simulation power supply with touch screen |
| 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 |
| CN112034375A (en) * | 2020-08-10 | 2020-12-04 | 中捷通信有限公司 | Communication power supply monitoring and module maintenance test system |
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| CN102175944A (en) * | 2011-02-24 | 2011-09-07 | 复旦大学 | Photovoltaic grid-connected inverter test bench |
| CN202135074U (en) * | 2011-06-30 | 2012-02-01 | 青岛鸿方软控有限公司 | Fully-intelligent cell simulator |
| CN202678985U (en) * | 2012-07-10 | 2013-01-16 | 国电联合动力技术有限公司 | New-energy output simulating application system |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2011120416A (en) * | 2009-12-07 | 2011-06-16 | Sharp Corp | Switching power supply device |
| CN102175944A (en) * | 2011-02-24 | 2011-09-07 | 复旦大学 | Photovoltaic grid-connected inverter test bench |
| CN202135074U (en) * | 2011-06-30 | 2012-02-01 | 青岛鸿方软控有限公司 | Fully-intelligent cell simulator |
| CN202678985U (en) * | 2012-07-10 | 2013-01-16 | 国电联合动力技术有限公司 | New-energy output simulating application system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105743438A (en) * | 2014-12-08 | 2016-07-06 | 上海航天有线电厂有限公司 | PV direct current simulation power supply with touch screen |
| CN104506138A (en) * | 2014-12-24 | 2015-04-08 | 北京航空航天大学 | Device for simulating volt-ampere characteristic of solar cell |
| CN105529992A (en) * | 2016-01-15 | 2016-04-27 | 广西大学 | Simulator capable of simulating output characteristics of photovoltaic module under any working condition |
| 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 |
| CN112034375A (en) * | 2020-08-10 | 2020-12-04 | 中捷通信有限公司 | Communication power supply monitoring and module maintenance test system |
| CN112034375B (en) * | 2020-08-10 | 2021-07-30 | 中捷通信有限公司 | Communication power supply monitoring and module maintenance test system |
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Application publication date: 20140423 |