CN204258620U - Photovoltaic DC-to-AC converter starts control device - Google Patents
Photovoltaic DC-to-AC converter starts control device Download PDFInfo
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- CN204258620U CN204258620U CN201420531102.1U CN201420531102U CN204258620U CN 204258620 U CN204258620 U CN 204258620U CN 201420531102 U CN201420531102 U CN 201420531102U CN 204258620 U CN204258620 U CN 204258620U
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- inverter
- photovoltaic
- circuit
- control device
- voltage
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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
- 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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Abstract
The utility model photovoltaic DC-to-AC converter starts control device, it is characterized in that: photovoltaic DC-to-AC converter starts control device and is used for the success of photovoltaic DC-to-AC converter one-shot, avoid repeatedly repeatedly starting closedown inverter, its structure is mainly made up of two circuit, one is resistance circuit, one is operating circuit, when resistance circuit generates electricity under low light condition for photovoltaic array, the electricity this being less than inverter startup voltage is used for load resistance and uses, voltmeter is made to detect the operating voltage of photovoltaic array, avoid the open circuit voltage measured now, after the operating voltage of test equals to be greater than inverter startup voltage, be switched to operating circuit, one-shot success inverter is kept away.Shunted by resistance Rz, avoid working as the surge phenomenon that inverter opens the moment of machine.The frequent starting of inverter is avoided to cause the infringement of components and parts or the shortening in life-span such as short-circuiting device, condenser of inverter.
Description
Technical field
The utility model is applied to the inverter inversion field in photovoltaic cell component electricity generation system power station, and particularly photovoltaic DC-to-AC converter starts control device.
Background technology
In short supply at present due to the energy, and the severe contamination of living environment, jeopardized the physical health issues of people.Therefore, people for a kind of new green energy resource of searching be urgent needed for, need to reach the problem solving energy scarcity; also totally environment friendly and pollution-free; reach the object of protection of the environment, these new green energy resources are progressively replaced traditional energy, reduce the pollution of environment.
Current solar cell belongs to the new generation of green energy, and due to the inexhaustible advantage of solar energy, is supported by people, solar cell power generation power station and from net small hydropower station will make get more and more, need to reach needed for people live.How effective the important step of photovoltaic plant construction be exactly be converted to alternating current by high efficiency for photovoltaic DC electricity, supplies and use to load.
The inverter of current use is substantially all that the galvanic voltage adopting monitoring photovoltaic array component to send carries out judging whether to start inverter.Owing between photovoltaic DC-to-AC converter with photovoltaic array component being the relation of connecting, only have when inverter is in the state of unlatching work time, now, the operating voltage of the output of the photovoltaic array component generating that voltmeter is measured, when inverter is in halted state time, such as, every morning inverter, first time is when starting, voltmeter is the galvanic open circuit voltage of photovoltaic array component of monitoring always, open circuit voltage due to photovoltaic module is far longer than its operating voltage, therefore, when sunlight is very weak, when photovoltaic module generating efficiency is very low, its open circuit voltage is very high, control module judges that voltmeter measuring voltage just starts to start inverter higher than the starting resistor that inverter requires, after inverter just starts, the open circuit voltage that voltmeter on circuit is measured is converted to the operating voltage of measurement, thus, operating voltage does not reach the minimum operating voltage of inverter, inverter is shut down again thus, startup so is repeatedly shut down, within to the last operating voltage reaches the operating voltage range of inverter, normally could start inverter, inverter just can normal work.Start inverter so frequently not only to the impact damage of the components and parts such as condenser, circuit breaker, power meter, protection of the operating circuit on inverter; reduce the useful life of inverter; also can due to the current surge started and turn-off transient produces; the relay of inverter, power cell can be impacted, even burn out electric capacity.As can be seen here, the inverter problem that this is is all need to solve, and needs frequent starting and the closedown of avoiding inverter, avoids starting moment generation current surge, damages components and parts.
Summary of the invention
For the problems referred to above, the utility model photovoltaic DC-to-AC converter starts control device, it is characterized in that: photovoltaic DC-to-AC converter starts control device and is used for the success of photovoltaic DC-to-AC converter one-shot, avoid repeatedly repeatedly starting closedown inverter, its structure is mainly made up of two circuit, and one is resistance circuit, and one is operating circuit, it also comprises an intelligent control module, and its structure is a resistance circuit in parallel on operating circuit.When resistance circuit generates electricity under low light condition for photovoltaic array, the electricity this being less than inverter startup voltage is used for load resistance and uses, voltmeter is made to detect the operating voltage of photovoltaic array, avoid the open circuit voltage measured now, after the operating voltage of test equals to be greater than inverter startup voltage, be switched to operating circuit, one-shot success inverter.
Described photovoltaic DC-to-AC converter, is characterized in that: photovoltaic DC-to-AC converter starts control device by photovoltaic DC-to-AC converter, inversion module, filtration module form.Wherein photovoltaic DC-to-AC converter starts control device module is that the utility model solves and starts inverter frequently to the impact damage of the components and parts such as condenser, circuit breaker, power meter, protection of the operating circuit on inverter; reduce the problem in the useful life of inverter; also solve due to the current surge started and turn-off transient produces; to relay, the power cell impact of inverter, even burn out the problem of electric capacity.
Described photovoltaic DC-to-AC converter starts control device, it is characterized in that: the resistance circuit that photovoltaic DC-to-AC converter starts control device is made up of variable resistor, bidirectional switch.
Described resistance circuit, is characterized in that: the load resistance of resistance circuit is 2-10 Ω, adjustable.
Described resistance circuit, is characterized in that: the bidirectional switch of resistance circuit is the switching for operating circuit and resistance circuit.
Described resistance circuit, is characterized in that: the load resistance on resistance circuit is in parallel with the voltmeter on operating circuit.
Described operating circuit, is characterized in that: operating circuit is for after inverter normal ON direct current input electricity, direct current is transported to inverter and carries out inversion.
Described operating circuit, is characterized in that: operating circuit is made up of circuit breaker, conveying cable, inversion unit.
Described circuit breaker, is characterized in that: circuit breaker to install and photovoltaic array gathers and input between inverter, for the protection of inverter, avoids overvoltage short circuit to cause damage inverter.
Described intelligent control module, it is characterized in that: intelligent control module is used for control inverter and starts, measurement data mainly by collecting voltmeter controls the switch direction of bidirectional switch, by judging whether operating voltage now reaches the starting resistor of inverter or whether realize in the operating voltage range of inverter.
Shown inverter startup control device, is characterized in that: inverter is made up of inverter startup module, inversion module, filtration module, and its structure starts model calling inversion module, and inversion module is connected with filtration module.
The utility model photovoltaic DC-to-AC converter starts control device, in inverter, increase a resistance circuit, and DC side is switched to resistance circuit after shutdown evening by inverter.Like this, the voltage of DC side that inverter detects morning is not just open circuit voltage.When voltage reaches the minimum voltage that inverter can work, DC side is switched to inverter operating circuit, start inverter.So just can ensure that inverter is disposable successfully to start, without the need to repeatedly restarting.The damage of the components and parts avoided thus, also extends the useful life of inverter.Again, the surge phenomenon that the moment that inverter opens machine produces, is shunted by resistance Rz, avoids the generation of surge phenomenon, thus the components and parts such as electric capacity in protection inverter.
Accompanying drawing explanation
Fig. 1 the utility model example circuit structure chart;
The control flow chart of the intelligent control module of Fig. 2 the utility model example.
Embodiment
The utility model photovoltaic DC-to-AC converter starts control device, it is characterized in that: photovoltaic DC-to-AC converter starts control device and is used for the success of photovoltaic DC-to-AC converter one-shot, avoid repeatedly repeatedly starting closedown inverter, its structure is mainly made up of two circuit, one is resistance circuit 1, one is operating circuit 2, and it also comprises an intelligent control module 3, and its structure is a resistance circuit in parallel on operating circuit.When resistance circuit generates electricity under low light condition for photovoltaic array, the electricity this being less than inverter startup voltage is used for load resistance and uses, voltmeter is made to detect the operating voltage of photovoltaic array, avoid the open circuit voltage measured now, after the operating voltage of test equals to be greater than inverter startup voltage, be switched to operating circuit, one-shot success inverter.
Described photovoltaic DC-to-AC converter, is characterized in that: photovoltaic DC-to-AC converter starts control device by photovoltaic DC-to-AC converter, inversion module 100, filtration module 200 form.Wherein photovoltaic DC-to-AC converter starts control device module is that the utility model solves and starts inverter frequently to the impact damage of the components and parts such as condenser, circuit breaker, power meter, protection of the operating circuit on inverter; reduce the problem in the useful life of inverter; also solve due to the current surge started and turn-off transient produces; to relay, the power cell impact of inverter, even burn out the problem of electric capacity.
Described photovoltaic DC-to-AC converter starts control device, it is characterized in that: the resistance circuit that photovoltaic DC-to-AC converter starts control device is made up of variable resistor 10, bidirectional switch 20.
Described resistance circuit, is characterized in that: the load resistance of resistance circuit is 2-10 Ω, adjustable.
Described resistance circuit, is characterized in that: the bidirectional switch of resistance circuit is the switching for operating circuit and resistance circuit.
Described resistance circuit, is characterized in that: the load resistance on resistance circuit is in parallel with the voltmeter 30 on operating circuit.
Described operating circuit, is characterized in that: operating circuit is for after inverter normal ON direct current input electricity, direct current is transported to inverter and carries out inversion.
Described operating circuit, is characterized in that: operating circuit is made up of circuit breaker, conveying cable, inversion unit.
Described circuit breaker, is characterized in that: circuit breaker to install and photovoltaic array gathers and input between inverter, for the protection of inverter, avoids overvoltage short circuit to cause damage inverter.
Described intelligent control module, is characterized in that: intelligent control module is used for control inverter and starts.Mainly by collect the measurement data of voltmeter judge the switch direction of bidirectional switch and judgement operating voltage now whether reach inverter starting resistor or whether in the operating voltage range of inverter.
Described can only control module control example process as follows:
Collect voltage V;
Do you judge V >=Vo? (V measuring voltage, Vo inverter startup voltage)
If V >=Vo;
Then, inverter startup, disconnecting consumers resistance R;
If V < is Vo;
Then, inverter is shut down, and judges whether V is greater than 0,
If V >=0,
Then, load resistance is connected;
If V < 0;
Then, start error-polarity connection to report to the police;
Return.
The utility model photovoltaic DC-to-AC converter starts control device, in inverter, increase a resistance circuit, and DC side is switched to resistance circuit after shutdown evening by inverter.Like this, the voltage of DC side that inverter detects morning is not just open circuit voltage.When voltage reaches the minimum voltage that inverter can work, DC side is switched to inverter operating circuit, start inverter.So just can ensure that inverter is disposable successfully to start, without the need to repeatedly restarting.The damage of the components and parts avoided thus, also extends the useful life of inverter.Again, the surge phenomenon that the moment that inverter opens machine produces, is shunted by resistance Rz, avoids the generation of surge phenomenon, thus the components and parts such as electric capacity in protection inverter.
Claims (5)
1. photovoltaic DC-to-AC converter starts control device, it is characterized in that: photovoltaic DC-to-AC converter starts control device and is used for the success of photovoltaic DC-to-AC converter one-shot, avoid repeatedly repeatedly starting closedown inverter, its structure is mainly made up of resistance circuit and operating circuit, its structure is a resistance circuit in parallel on operating circuit, start when resistance circuit generates electricity under photovoltaic array low light condition, the photovoltaic module generating electricity being less than inverter startup voltage is used for load resistance use, voltmeter is made to detect the operating voltage of photovoltaic array, avoid the open circuit voltage of the photovoltaic module measured now, after the operating voltage of test equals to be greater than inverter startup voltage, be switched to operating circuit, one-shot success inverter.
2. photovoltaic DC-to-AC converter as claimed in claim 1 starts control device, and it is characterized in that: described resistance circuit is made up of load resistance, a bidirectional switch, the load resistance of resistance circuit is variable resistor.
3. photovoltaic DC-to-AC converter as claimed in claim 1 starts control device, it is characterized in that: described operating circuit is made up of circuit breaker, conveying cable, inversion unit.
4. inverter startup control device as shown in claim 1, is characterized in that; Voltmeter and resistance circuit are in parallel.
5. inverter startup control device as shown in claim 1, is characterized in that: inverter is made up of inverter startup control module, inversion module, filtration module, and its structure starts model calling inversion module, and inversion module is connected with filtration module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420531102.1U CN204258620U (en) | 2014-09-16 | 2014-09-16 | Photovoltaic DC-to-AC converter starts control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420531102.1U CN204258620U (en) | 2014-09-16 | 2014-09-16 | Photovoltaic DC-to-AC converter starts control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204258620U true CN204258620U (en) | 2015-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420531102.1U Expired - Fee Related CN204258620U (en) | 2014-09-16 | 2014-09-16 | Photovoltaic DC-to-AC converter starts control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204258620U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105762834A (en) * | 2016-03-11 | 2016-07-13 | 深圳茂硕电气有限公司 | Photovoltaic inverter intelligent starting control system |
| CN108599265A (en) * | 2018-05-15 | 2018-09-28 | 许继电气股份有限公司 | A kind of photovoltaic synchronization inverter system and inverter startup control method |
-
2014
- 2014-09-16 CN CN201420531102.1U patent/CN204258620U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105762834A (en) * | 2016-03-11 | 2016-07-13 | 深圳茂硕电气有限公司 | Photovoltaic inverter intelligent starting control system |
| CN108599265A (en) * | 2018-05-15 | 2018-09-28 | 许继电气股份有限公司 | A kind of photovoltaic synchronization inverter system and inverter startup control method |
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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: 20150408 Termination date: 20180916 |