CN203069691U - System for detecting electric performances of photovoltaic inverter - Google Patents
System for detecting electric performances of photovoltaic inverter Download PDFInfo
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- CN203069691U CN203069691U CN 201220663736 CN201220663736U CN203069691U CN 203069691 U CN203069691 U CN 203069691U CN 201220663736 CN201220663736 CN 201220663736 CN 201220663736 U CN201220663736 U CN 201220663736U CN 203069691 U CN203069691 U CN 203069691U
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- 238000005516 engineering process Methods 0.000 description 6
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Abstract
The utility model provides a system for detecting electric performances of a photovoltaic inverter. The system comprises a photovoltaic inverter, a power analyzer and an upper computer. The power analyzer collects electric parameters of the photovoltaic inverter, and transmits the collected item parameters to the upper computer. The upper computer is a PC (personal computer). The system can complete the efficiency test and the harmonic test of the photovoltaic inverter, and has the advantages that the structure is simple, the use is convenient, accuracy of an electric power data test can be guaranteed, and on the other hand, complex data processing work in a test process is simplified, and the test efficiency of the photovoltaic inverter is improved.
Description
Technical field
The utility model belongs to efficiency test and appraisal technical field, is specifically related to a kind of photovoltaic DC-to-AC converter system for detecting electrical property.
Background technology
Solar energy power generating is little because of its volume, and the life-span is long, and the characteristics of zero delivery increase fast.Present stage, photovoltaic generation mainly comprises 400V low-voltage customer side grid-connected system and inserts the large-sized photovoltaic power station of medium-sized photovoltaic plant and the access 66kV of 10kV and 35kV through step-up transformer.On July 21st, 2009; the Ministry of Finance, the Department of Science and Technology, National Energy Board unite and have issued " about implementing the notice of golden sun demonstration project "; determine comprehensively to take financial aid, science and technology to support and market pulling mode, accelerate industrialization and the large-scale development of domestic photovoltaic generation.In March, 2009, National Ministry of Finance is for carrying out and implementing " regenerative resource method ", implement State Council's energy-saving and emission-reduction strategic plan, accelerate the solar energy power technology in the application in urban and rural buildings field, formulated " solar photoelectric Application in Building financial aid capital management tentative method ".Under the promotion energetically of national policy, the distributed photovoltaic power supply has had swift and violent development.According to statistics, by the end of the year 2011, the photovoltaic that is incorporated into the power networks is installed 214.30 ten thousand kilowatts, accounts for 4.15% of distributed power source total volume.
Development along with photovoltaic industry, photovoltaic DC-to-AC converter is had higher requirement, inversion unit is the key equipment in the whole DC power generation system, its effect is that the low-voltage DC that cell panel and accumulator provide is reverse into alternating current, the supply AC load is used, and its reliability directly has influence on the stability of whole DC power generation system operation.The output waveform of inverter should have less degree of distortion, to avoid grid-connected photovoltaic system the public electric wire net volume is polluted.For improving rate of energy, should provide the conversion efficiency of inverter as possible.
At present, the testing precision of the electric performance test of inverter (conversion efficiency and harmonic wave) is very high, but when the inverter electric performance test, exists data volume big, and power data relies on the problem of hand-kept, processing.Therefore cause efficiency test job efficient lower, consuming time longer.
The utility model content
In order to overcome above-mentioned the deficiencies in the prior art, the utility model provides a kind of photovoltaic DC-to-AC converter system for detecting electrical property, finish efficiency test, the harmonic wave test of photovoltaic DC-to-AC converter, this system architecture is simple, easy to use, can guarantee the accuracy of electric power data test, simplify data processing work loaded down with trivial details in the test process on the other hand, improve the testing efficiency of photovoltaic DC-to-AC converter.
To achieve these goals, the utility model is taked following scheme:
A kind of photovoltaic DC-to-AC converter system for detecting electrical property is provided, and described system comprises photovoltaic DC-to-AC converter, power analyzer and host computer; Described power analyzer is gathered described photovoltaic DC-to-AC converter electrical quantity, and the item argument of gathering is transferred to host computer, and described host computer is PC.
Described electrical quantity comprises electric weight, electric power, voltage and current.
Realize between described power analyzer and the host computer that LAN connects, the data that described host computer received power analyser sends are carried out statistical computation by the Excel worksheet to data, and then generate data sheet, and preserve and print.
Described system detects photovoltaic DC-to-AC converter in input efficiency, output efficiency and the power factor of 5%, 10%, 15%, 20%, 25%, 30%, 50%, 75% and 100% power points of rated power, obtains integration efficient in the cumulative time by the Excel worksheet.
The model of described power analyzer is 3390, and its cumulative time of pointing out image data at above-mentioned power is adjustable, and it is by the clock control of described power analyzer.
Compared with prior art, the beneficial effects of the utility model are:
1. the utility model is finished efficiency test, the harmonic wave test of photovoltaic DC-to-AC converter, this system architecture is simple, method is simple, easy to use, can guarantee the accuracy of electric power data test, simplify data processing work loaded down with trivial details in the test process on the other hand, improve the testing efficiency of photovoltaic DC-to-AC converter.
2.Excle self have good man computer interface and concrete data-handling capacity, and have outstanding demonstration printing control function, easy to use; Can change the input and output object according to on-the-spot needs, measure inverter and exchange or the DC side parameter.
3. slave computer of the present utility model is power analyzer, and its physical quantity accuracy is guaranteed by the power instrument analysis.
4. it is big to have solved in the past in inverter electrical property measuring process amount of test data, data processing work is loaded down with trivial details, problems such as accuracy of measurement is low, and electric weight accumulation duration is adjustable in the efficiency test process, and electric weight accumulation duration is reliable by the control of power analyzer machine clock, accurate timing.
Description of drawings
Fig. 1 is photovoltaic DC-to-AC converter system for detecting electrical property structural drawing among the utility model embodiment;
Fig. 2 is photovoltaic DC-to-AC converter system for detecting electrical property fundamental diagram among the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
As Fig. 1, a kind of photovoltaic DC-to-AC converter system for detecting electrical property is provided, described system comprises photovoltaic DC-to-AC converter, power analyzer and host computer; Described power analyzer is gathered described photovoltaic DC-to-AC converter electrical quantity, and the item argument of gathering is transferred to host computer, and described host computer is PC.
Described electrical quantity comprises electric weight, electric power, voltage and current.
Realize between described power analyzer and the host computer that LAN connects, the data that described host computer sends by the VBA technology received power analyser in the Excel worksheet, by the Excel worksheet data are carried out statistical computation, and then generate data sheet, and preserve and print.
Described system detects photovoltaic DC-to-AC converter in input efficiency, output efficiency and the power factor of 5%, 10%, 15%, 20%, 25%, 30%, 50%, 75% and 100% power points of rated power, obtains integration efficient in the cumulative time by the Excel worksheet.
The model of described power analyzer is 3390, and its cumulative time of pointing out image data at above-mentioned power is adjustable, and it is by the clock control of described power analyzer.
As Fig. 2, the utility model provides a kind of photovoltaic DC-to-AC converter system for detecting electrical property principle of work as follows:
1. timing acquiring photovoltaic DC-to-AC converter electrical quantity; The voltage and current signal access power analyser of photovoltaic DC-to-AC converter, the electric weight accumulation duration that power analyzer is set is 10 minutes, realizes the timing acquiring of data;
2. IP address and the port numbers of power analyzer and host computer are set;
3. regulate the output power of described photovoltaic DC-to-AC converter, make it reach 5% of rated power, carry out the efficiency test of 5% power points;
4. survey the efficient of 10%, 15%, 20%, 25%, 30%, 50%, 75% and 100% power points according to the method described above, comprise maximum power point P
MaxTest;
5. generate and the derived data form according to Excel.
Photovoltaic DC-to-AC converter should not cause grid voltage waveform excessively distortion and the excessive harmonic current of injection electrical network when operation, to guarantee that other equipment that are connected to electrical network are not caused adverse effect.So when the photovoltaic DC-to-AC converter run with load, current harmonics resultant distortion rate limit value is 5%, and the containing ratio of each harmonic electric current has a concrete limit value.Whether in test, it is up to standard at the relative harmonic content at 100%, 70%, 50%, 30% POL place to detect inverter successively.
Harmonic wave test link of the present utility model, communicate by letter with power analyzer by the VBA technology among the Excel, total harmonic distortion degree, each time containing ratio, each time effective values such as A, B, C three-phase voltage, electric current in the difference readout power analyser 3390, data processing tools by Excel compares the data of collection and the relative harmonic content of requirement then, draws test result.Use color to mark each test data and whether surpass limit value, if surpass limit value then with red mark, eye-catching directly perceived.
Should be noted that at last: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit, although with reference to above-described embodiment the utility model is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or be equal to replacement embodiment of the present utility model, and do not break away from any modification of the utility model spirit and scope or be equal to replacement, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (5)
1. photovoltaic DC-to-AC converter system for detecting electrical property, it is characterized in that: described system comprises photovoltaic DC-to-AC converter, power analyzer and host computer; Described power analyzer is gathered described photovoltaic DC-to-AC converter electrical quantity, and the item argument of gathering is transferred to host computer, and described host computer is PC.
2. photovoltaic DC-to-AC converter system for detecting electrical property according to claim 1, it is characterized in that: described electrical quantity comprises electric weight, electric power, voltage and current.
3. photovoltaic DC-to-AC converter system for detecting electrical property according to claim 1, it is characterized in that: realize between described power analyzer and the host computer that LAN connects, the data that described host computer received power analyser sends, by the Excel worksheet data are carried out statistical computation, and then the generation data sheet, and preserve and print.
4. photovoltaic DC-to-AC converter system for detecting electrical property according to claim 1, it is characterized in that: described system detects photovoltaic DC-to-AC converter in input efficiency, output efficiency and the power factor of 5%, 10%, 15%, 20%, 25%, 30%, 50%, 75% and 100% power points of rated power, obtains integration efficient in the cumulative time by the Excel worksheet.
5. photovoltaic DC-to-AC converter system for detecting electrical property according to claim 1, it is characterized in that: the model of described power analyzer is 3390, and its cumulative time of pointing out image data at above-mentioned power is adjustable, and it is by the clock control of described power analyzer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220663736 CN203069691U (en) | 2012-12-05 | 2012-12-05 | System for detecting electric performances of photovoltaic inverter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220663736 CN203069691U (en) | 2012-12-05 | 2012-12-05 | System for detecting electric performances of photovoltaic inverter |
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| CN203069691U true CN203069691U (en) | 2013-07-17 |
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| CN 201220663736 Expired - Lifetime CN203069691U (en) | 2012-12-05 | 2012-12-05 | System for detecting electric performances of photovoltaic inverter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063943A (en) * | 2012-12-05 | 2013-04-24 | 中国电力科学研究院 | System and method of detecting electric performance of photovoltaic inverter |
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2012
- 2012-12-05 CN CN 201220663736 patent/CN203069691U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063943A (en) * | 2012-12-05 | 2013-04-24 | 中国电力科学研究院 | System and method of detecting electric performance of photovoltaic inverter |
| CN103063943B (en) * | 2012-12-05 | 2014-02-19 | 中国电力科学研究院 | Method of detecting electric performance of photovoltaic inverter |
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Granted publication date: 20130717 |
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| CX01 | Expiry of patent term |