CN202281961U - Current adjusting system of photovoltaic inverter alternating current source - Google Patents
Current adjusting system of photovoltaic inverter alternating current source Download PDFInfo
- Publication number
- CN202281961U CN202281961U CN2011204243057U CN201120424305U CN202281961U CN 202281961 U CN202281961 U CN 202281961U CN 2011204243057 U CN2011204243057 U CN 2011204243057U CN 201120424305 U CN201120424305 U CN 201120424305U CN 202281961 U CN202281961 U CN 202281961U
- Authority
- CN
- China
- Prior art keywords
- current
- photovoltaic inverter
- photovoltaic
- alternating current
- converter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Control Of Electrical Variables (AREA)
- Inverter Devices (AREA)
Abstract
The utility model relates to the technical field of inverters, in particular to a current adjusting system of a photovoltaic inverter alternating current source, which comprises a voltage adjuster and a reduction transformer. The input end of the voltage adjuster is connected with the alternating current input end, the output end of the voltage adjuster is connected with the input end of the reduction transformer, and the output end of the reduction transformer is connected with the photovoltaic inverter. Current input into the photovoltaic inverter and an alternating current (AC) current transformer can be adjusted through the voltage adjuster and the reduction transformer according to the requirement for current input into the photovoltaic inverter, and current generated by the AC current transformer is input into the photovoltaic inverter to be compared with current sampled by the photovoltaic inverter. When difference occurs in comparison, the current sampling value of the photovoltaic inverter is adjusted, so that current sampling accuracy of the photovoltaic inverter is improved, and the photovoltaic inverter is more accurate in current sampling and provides more reliable electricity for a power grid.
Description
Technical field
The utility model relates to the inverter technology field, is specifically related to a kind of current adjusting system of photovoltaic DC-to-AC converter alternating current source.
Background technology
Along with growing interest to global environmental protection; Produce free of contamination natural energy source demand for example the sun caused great interest as a kind of energy substitution future source of energy; Because sun power is a kind of cleanliness without any pollution and inexhaustible; In order to effectively utilize sun power, a large amount of researchs about being incorporated into the power networks are carried out in photovoltaic generating system.Wherein when the sun power converting electrical energy is incorporated into the power networks application, need to use inverter, it mainly acts on is the equipment that direct current is changed into alternating current, under the off-duty situation of photovoltaic DC-to-AC converter, can not the sampled value of electric current be detected accurately.
Summary of the invention
To above-mentioned technical matters; The utility model provides a kind of current adjusting system of photovoltaic DC-to-AC converter alternating current source; It can be regulated the electric current of input photovoltaic DC-to-AC converter ac sensor, and according to comparison the current sampling data of photovoltaic DC-to-AC converter is adjusted, and strengthens the accuracy of photovoltaic DC-to-AC converter current sample; Make photovoltaic DC-to-AC converter more accurate, more reliable power supply quality is provided to electrical network to current sample.
The technical scheme that realizes the utility model is following:
A kind of current adjusting system of photovoltaic DC-to-AC converter alternating current source; This regulating system comprises pressure regulator, step-down transformer, current sampling unit and test component; The input end of said pressure regulator connects the input end of alternating current input end, output terminal connection step-down transformer; The output terminal of step-down transformer is connected with current sampling unit that electric current in the circuit is sampled and the test component that the electric current that collects is tested, and the output terminal of said test component is connected with photovoltaic DC-to-AC converter.
The output terminal of said step-down transformer is serially connected with current limiting element, and current limiting element limits the electric current of step-down transformer output, guarantees the current limit exported with this.
Said test component is a D.C mutual-inductor.
Adopted such scheme; Needs according to input photovoltaic DC-to-AC converter size of current; Can regulate the electric current of input photovoltaic DC-to-AC converter D.C mutual-inductor through pressure regulator, step-down transformer, the current value that samples with photovoltaic DC-to-AC converter in the electric current input photovoltaic DC-to-AC converter that D.C mutual-inductor produces is compared, when difference appears in comparison; Current sampling data to photovoltaic DC-to-AC converter is adjusted; Thereby strengthened the accuracy of photovoltaic DC-to-AC converter current sample, made photovoltaic DC-to-AC converter more accurate, more reliable power supply quality is provided to electrical network to current sample.
Description of drawings
Fig. 1 is the theory diagram of the utility model;
In the accompanying drawing, 1 is pressure regulator, and 2 is step-down transformer, and 3 is photovoltaic DC-to-AC converter, and 4 is current limiting element, and 5 is current sampling unit, and 6 is test component.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is further specified.
Referring to Fig. 1; A kind of current adjusting system of photovoltaic DC-to-AC converter alternating current source; This regulating system comprises pressure regulator 1, step-down transformer 2, through pressure regulator voltage is carried out 0V and arrives the adjusting in the certain numerical value scope, variable big electric current is provided for the step-down transformer secondary side through step-down transformer 2 again; The input end of pressure regulator 1 connects the input end of alternating current input end, output terminal connection step-down transformer; The output terminal of step-down transformer is connected with current sampling unit 5, and current sampling unit is gathered the electric current of step-down transformer output, detects the size of current of step-down transformer output; The output terminal of step-down transformer is connected with test component 6, and the output terminal of test component 6 connects photovoltaic DC-to-AC converter 3, series connection current limiting element 4 in the secondary side of step-down transformer, and when specifically using, current limiting element is selected current-limiting resistance for use, and test component is a D.C mutual-inductor.
Claims (3)
1. the current adjusting system of a photovoltaic DC-to-AC converter alternating current source; It is characterized in that: this regulating system comprises pressure regulator, step-down transformer, current sampling unit and test component; The input end of said pressure regulator connects the input end of alternating current input end, output terminal connection step-down transformer; The output terminal of step-down transformer is connected with current sampling unit that electric current in the circuit is sampled and the test component that the electric current that collects is tested, and the output terminal of said test component is connected with photovoltaic DC-to-AC converter.
2. the current adjusting system of a kind of photovoltaic DC-to-AC converter alternating current source according to claim 1 is characterized in that: the output terminal of said step-down transformer is serially connected with current limiting element.
3. the current adjusting system of a kind of photovoltaic DC-to-AC converter alternating current source according to claim 1 is characterized in that: said test component is a D.C mutual-inductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204243057U CN202281961U (en) | 2011-10-31 | 2011-10-31 | Current adjusting system of photovoltaic inverter alternating current source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204243057U CN202281961U (en) | 2011-10-31 | 2011-10-31 | Current adjusting system of photovoltaic inverter alternating current source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202281961U true CN202281961U (en) | 2012-06-20 |
Family
ID=46228121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204243057U Expired - Fee Related CN202281961U (en) | 2011-10-31 | 2011-10-31 | Current adjusting system of photovoltaic inverter alternating current source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202281961U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104917458A (en) * | 2015-05-22 | 2015-09-16 | 江苏固德威电源科技有限公司 | Method and circuit for detecting output current in absence of sensor |
-
2011
- 2011-10-31 CN CN2011204243057U patent/CN202281961U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104917458A (en) * | 2015-05-22 | 2015-09-16 | 江苏固德威电源科技有限公司 | Method and circuit for detecting output current in absence of sensor |
| CN104917458B (en) * | 2015-05-22 | 2017-12-15 | 江苏固德威电源科技股份有限公司 | A kind of method and its circuit of sensorless detection output current |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104079193A (en) | Device for direct current component adjustment and control method thereof | |
| Li et al. | Research on a stand-alone photovoltaic system with a supercapacitor as the energy storage device | |
| CN104360143A (en) | Load zero crossing point detection circuit and method and load voltage detection circuit and method | |
| CN203720698U (en) | Multistage voltage stabilizing main circuit device of power supply for simulating properties of photovoltaic module | |
| MX2012001356A (en) | Systems and methods for asynchronous sampling data conversion. | |
| Salam et al. | Efficiency for photovoltaic inverter: A technological review | |
| CN102361415A (en) | Power device for simulating volt-ampere characteristics of photovoltaic battery | |
| CN202075333U (en) | Surge current tester | |
| CN202870278U (en) | Test platform for small photovoltaic grid-connected inverter | |
| US20160099676A1 (en) | Method and apparatus for an integrated pv curve tracer | |
| CN202281961U (en) | Current adjusting system of photovoltaic inverter alternating current source | |
| CN105182100A (en) | Voltage fluctuation test system and voltage fluctuation test method for photovoltaic inverters | |
| CN102437233A (en) | Laser reticle detecting system and method of solar battery board | |
| CN104022516A (en) | Reactive compensation method and device for photovoltaic power generation system, and photovoltaic power generation system | |
| CN204649850U (en) | Photovoltaic DC-to-AC converter emc testing system | |
| Schonardie et al. | Active and reactive power control in a three-phase grid-connected Pv power system using Dq0 transformation | |
| CN204615495U (en) | Based on photovoltaic power generation apparatus and the water pump system thereof of city's electronic compensating | |
| CN204330872U (en) | The load voltage testing circuit of current zero-crossing point testing circuit and correspondence | |
| CN105182068A (en) | System and method for testing adaptability of photovoltaic inverter to grid harmonic | |
| KR101201933B1 (en) | Method and apparatus for most power point tracking of solar cell module | |
| CN203552558U (en) | Electronic-type standard cell | |
| Lee et al. | Development of a 250kW PV PCS and adaptive MPPT method | |
| CN203482144U (en) | Solar energy intelligent micro-gird power generation system | |
| CN202282375U (en) | Solar cell panel laser reticle detection apparatus | |
| Hosseinzadeh et al. | Design, implementation and installation of a hybrid renewable energy system at Sultan Qaboos University |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120620 Termination date: 20201031 |