CN103326398B - Voltage compensating device and comprise current transformer, the photovoltaic generating system of this device - Google Patents
Voltage compensating device and comprise current transformer, the photovoltaic generating system of this device Download PDFInfo
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- CN103326398B CN103326398B CN201310231914.4A CN201310231914A CN103326398B CN 103326398 B CN103326398 B CN 103326398B CN 201310231914 A CN201310231914 A CN 201310231914A CN 103326398 B CN103326398 B CN 103326398B
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Abstract
This application provides a kind of photovoltaic generating system, comprise at least one current transformer with direct-flow input end and ac output end, the photovoltaic group string, transformer and the voltage compensating device that are electrically connected corresponding to the direct-flow input end of described current transformer, the current potential of the arbitrary phase of ac output end of described current transformer is controlled by the output voltage controlling described voltage compensating device, thus lifting photovoltaic group string negative pole current potential is to eliminate the impact of PID, thus improve the useful life of photovoltaic module; The device that the application provides and system, structure is simple, and cost is low, goes for multiple occasion.
Description
Technical field
The application relates to technical field of photovoltaic power generation, particularly a kind of voltage compensating device, current transformer and photovoltaic generating system solving potential induction attenuation.
Background technology
Potential induction attenuation (PID, PotentialInducedDegradation) refers to: because high pressure is applied on photovoltaic module (solar panel) and makes the phenomenon that its performance reduces over the ground.This high pressure may be positive voltage, may be also negative voltage, specifically positive voltage or negative voltage, depend on the characteristic of photovoltaic module.
The phenomenon that PID causes photovoltaic module performance to reduce is: degradation under open circuit voltage decline (Voc), breaking current (Isc) fill factor, curve factor (FF).
SUNPOWER company of famous American photovoltaic manufacturer finds, adopts backplane contact high-efficiency battery sheet A-300, specifically on assembly, applies a high back voltage, Surface Polarization phenomenon occurs.If apply the positive voltage relative to the earth on assembly, leakage current can flow to ground from battery immediately.The surface of battery can along with accumulated time negative electrical charge, and positive charge can be attracted to battery surface by these electric charges, forms complex centre.On the contrary, when assembly applying negative voltage, polarization phenomena are corresponding change also, and the performance of assembly does not have impact in this case.
In recent years, along with the development of large-scale power station, mainly near the power station of coastal area, the environmental condition in these areas is relatively more severe, such as, and high temperature, high humidity etc.Along with the prolongation of time, PID problem is more and more serious.Solve PID problem in prior art and mainly adopt following methods.
The first, by improving the materials and process of cell panel.
Such as, to assembly material, the insulating properties of encapsulating material (glued membrane), the thin and thick etc. in battery surface reflector, some assembly producer tentatively solves this problem both at home and abroad at present.
But this method can cause cost to increase.
The second, processes inverter.
Such as, PV ground connection etc.
Due to, PV ground connection needs to increase GFDI device, in addition, also must consider that earth point increases cost indirectly, and not often kind of product can be suitable for.
Therefore, how solving the problem of the hydraulic performance decline that potential induction attenuation is brought to assembly, is those skilled in the art's technical issues that need to address.
Summary of the invention
The technical problem that the application will solve is to provide a kind of voltage compensating device and the photovoltaic generating system that solve potential induction attenuation, effectively can solve the photovoltaic module degradation problem that PID causes.
The application provides a kind of photovoltaic generating system, comprise the current transformer that at least one has direct-flow input end and ac output end, the photovoltaic group string that be electrically connected corresponding to the direct-flow input end of described current transformer, transformer, described photovoltaic group string comprises at least one photovoltaic module, described transformer comprises primary side and primary side, the ac output end of described primary side and current transformer is electrically connected, described photovoltaic generating system also comprises: voltage compensating device, the current potential of the arbitrary phase of ac output end of described current transformer is controlled by the output voltage controlling described voltage compensating device.
Further, described transformer primary has neutral terminal; The output of described voltage compensating device connects arbitrary phase of the ac output end of described current transformer; The input of described voltage compensating device connects arbitrary phase of the ac output end of described current transformer and the neutral terminal of described transformer primary; What the output of described voltage compensating device and input were connected with the ac output end of described current transformer is same phase.
Further, described photovoltaic generating system also comprises neutral line device, the input of described voltage compensating device connects arbitrary phase of the ac output end of current transformer and one end of neutral line device, and the other end of described neutral line device is connected with the ac output end of described current transformer; The output of described voltage compensating device connects arbitrary phase of the ac output end of described current transformer; What the output of described voltage compensating device and input were connected with the ac output end of described current transformer is same phase.
Further, described neutral line device comprises three resistance, and one end of described resistance links together, and its common point is connected with the input of described voltage compensating device, and the other end of described resistance is connected with three of the ac output end of described current transformer respectively; Or described neutral line device comprises three non-polar electric capacity, and one end of described electric capacity links together, and its common point is connected with the input of described voltage compensating device, the other end of described electric capacity is connected with three of the ac output end of described current transformer respectively.
Further, described transformer is middle pressure transformer.
Further, described current transformer comprises voltage conversion circuit, and described transformer is a part for current transformer, and the ac output end of described current transformer is between voltage conversion circuit and transformer.
Further, described voltage compensating device comprises alternating current is converted to galvanic voltage transformation module.
Further, described voltage compensating device be described at least one there is the part of any one current transformer in the current transformer of direct-flow input end and ac output end.
Present invention also provides a kind of voltage compensating device being applied to above-mentioned photovoltaic generating system.
Present invention also provides a kind of current transformer being applied to photovoltaic generating system, comprise above-mentioned voltage compensating device.
Compared with prior art, the application has the following advantages:
The voltage compensating device that the application provides and comprise current transformer and the photovoltaic generating system of this device, this voltage compensating device is from the primary side power taking of transformer, the current potential of the arbitrary phase of ac output end of current transformer is controlled by controlling its output voltage, thus lifting photovoltaic group string negative pole current potential is to eliminate the impact of PID, thus improve the useful life of photovoltaic module.It should be noted that, described transformer both can be the middle pressure transformer in large-sized photovoltaic electricity generation system, also can be the isolating transformer in middle-size and small-size photovoltaic generating system, can also be the transformer that current transformer carries; The described neutral line both can be the neutral terminal that transformer primary carries, and for the system of transformer not having neutral terminal, can be built by electric capacity or resistance.The PID solution that the application provides, structure is simple, and cost is low, goes for multiple occasion.When containing multiple current transformer in photovoltaic generating system, only this voltage compensating device need be set at the ac output end of a current transformer, can reach all current transformers in elimination system connect the PID impact of photovoltaic group string, thus useful life of all photovoltaic modulies in raising system.
Accompanying drawing explanation
Fig. 1 is photovoltaic generating system embodiment one schematic diagram that the application provides;
Fig. 2 is photovoltaic generating system embodiment two schematic diagram that the application provides;
Fig. 3 is photovoltaic generating system embodiment three schematic diagram that the application provides;
Fig. 4 is photovoltaic generating system embodiment four schematic diagram that the application provides;
Fig. 5 is photovoltaic generating system embodiment five schematic diagram that the application provides;
Fig. 6 is photovoltaic generating system embodiment six schematic diagram that the application provides;
Embodiment
For enabling above-mentioned purpose, the feature and advantage of the application more become apparent, be described in detail below in conjunction with the embodiment of accompanying drawing to the application.
Refer to Fig. 1, for the schematic diagram of the photovoltaic generating system embodiment one that the application provides, the photovoltaic generating system 10 that this embodiment provides is three-phase system, comprise at least one current transformer 120 with direct-flow input end and ac output end, the photovoltaic group string 110, the transformer 130 that are electrically connected corresponding to the direct-flow input end of current transformer 120, photovoltaic group string 110 comprises at least one photovoltaic module, transformer 130 comprises primary side 130a and primary side 130b, and the ac output end of primary side 130a and current transformer 120 is electrically connected; Primary side 130a has neutral terminal.
Photovoltaic generating system 10 also comprises voltage compensating device 150, is controlled the current potential of arbitrary phase in ac output end U, V, W phase of current transformer 120 by the output voltage of control voltage compensation arrangement 150.
The photovoltaic generating system that the application provides, there is such voltage compensating device, this voltage compensating device is from the primary side power taking of transformer, the current potential of the arbitrary phase of ac output end of current transformer is controlled by controlling its output voltage, thus lifting photovoltaic group string negative pole current potential is to eliminate the impact of PID, thus improve the useful life of photovoltaic module.When containing multiple current transformer in photovoltaic generating system, only this voltage compensating device need be set at the ac output end of a current transformer, can reach all current transformers in elimination system connect the PID impact of photovoltaic group string, thus useful life of all photovoltaic modulies in raising system.
Further, voltage compensating device 150 output connect current transformer 120 ac output end U, V, W phase in mutually arbitrary; Arbitrary phase in U, V, W phase of the ac output end of the input connection current transformer 120 of voltage compensating device 150 and the neutral terminal of transformer primary.
It should be noted that, in the embodiment of the present application voltage compensating device output with input be connected with the ac output end of current transformer be same phase.See Fig. 1, shown in embodiment one is W phase.
Therefore, the current potential of the arbitrary phase of ac output end of current transformer can be controlled by the output voltage of control voltage compensation arrangement, carry out the current potential of corresponding lifting system neutral terminal, thus lifting photovoltaic group string negative pole current potential be to eliminate the impact of PID.When containing multiple current transformer in photovoltaic generating system, only this voltage compensating device need be set at the ac output end of a current transformer, can reach all current transformers in elimination system connect the PID impact of photovoltaic group string, thus useful life of all photovoltaic modulies in raising system.
It should be noted that, described transformer both can be the middle pressure transformer in large-sized photovoltaic electricity generation system, also can be the isolating transformer in middle-size and small-size photovoltaic generating system, can be even the transformer that current transformer carries.
Further, voltage compensating device 150 comprises alternating current is converted to galvanic voltage transformation module, this voltage transformation module can be any one in prior art, as long as alternating current can be realized be converted to direct current, such as AC/DC structure, AC/DC+DC/DC, AC/DC+ transformer+DC/DC etc.
It should be noted that, the voltage compensating device that the embodiment of the present application provides can be described at least one there is the part of any one current transformer in the current transformer of direct-flow input end and ac output end, also can be independently device.
Refer to Fig. 2, for the schematic diagram of the photovoltaic generating system embodiment two that the application provides, distinguish with embodiment one and be, the primary side self of the transformer 131 in photovoltaic generating system 20 does not have neutral terminal, but constructs neutral line device 140 between the primary side and the ac output end of current transformer 120 of transformer 131;
The input of voltage compensating device 150 connects the W phase of the ac output end of current transformer 120 and one end of neutral line device 140, the other end of described neutral line device 140 is connected with the primary side of transformer 131, concrete, the other end of described neutral line device 140 is connected with three of the ac output end of described current transformer 120; The output of voltage compensating device 150 connects the W phase of the ac output end of current transformer 120.
Therefore, the current potential of the arbitrary phase of ac output end of current transformer can be controlled by the output voltage of control voltage compensation arrangement, carry out the current potential of corresponding lifting neutral line device, thus lifting photovoltaic group string negative pole current potential be to eliminate the impact of PID.When containing multiple current transformer in photovoltaic generating system, only this voltage compensating device need be set at the ac output end of a current transformer, can reach all current transformers in elimination system connect the PID impact of photovoltaic group string, thus useful life of all photovoltaic modulies in raising system.
See Fig. 3, this figure is the schematic diagram of the photovoltaic generating system embodiment three that the application provides.Be with the difference of embodiment two, neutral line device 140 in photovoltaic generating system 30 comprises three non-polar electric capacity, one end of described electric capacity links together, its common point is connected with the input of voltage compensating device 150, and the other end of described electric capacity is connected with three of the ac output end of current transformer 120 respectively.
Can substitute, neutral line device 140 can also be built by resistance, concrete, neutral line device 140 comprises three resistance, one end of described resistance links together, its common point is connected with the input of described voltage compensating device 150, and the other end of described resistance is connected with three of the ac output end of described current transformer 120 respectively.Not shown, can with reference to the building mode of electric capacity.
By utilizing electric capacity or resistance to build neutral terminal, scheme is simple, and is also applicable to the system that transformer does not possess neutral terminal.
It should be noted that, the transformer of the photovoltaic generating system that the embodiment of the present application provides can be middle pressure transformer.Refer to the embodiment schematic diagram shown in Fig. 1 to Fig. 3.
For the electricity generation system of middle low power, transformer is isolating transformer, mainly plays isolation or transformation;
The scheme that the application provides, does not possess the current transformer of isolating transformer for self, the ac output end of current transformer needs to connect isolating transformer; For the current transformer self possessing isolating transformer, the ac output end of current transformer can connect isolating transformer, also can not connect isolating transformer, determine according to practical situations.
Referring to Fig. 4, is the schematic diagram of the photovoltaic generating system embodiment four that the application provides.Photovoltaic generating system 40 comprises current transformer 220, be connected to the direct-flow input end of current transformer 220 provides galvanic photovoltaic group string 210, the isolating transformer 230 being connected to the ac output end of current transformer 220 and neutral line device 240 and voltage compensating device 250 for it, photovoltaic group string 210 comprises at least one photovoltaic module, isolating transformer 230 and current transformer 220 are independently device separately, current transformer 220 self can have transformer, also can not have transformer.
Annexation and the building mode of neutral line device 240 and voltage compensating device 250 and other devices in system can see other embodiments above-mentioned.It should be noted that for different systems, different to the requirement of the design parameter of components and parts in device.
Refer to Fig. 5, for the schematic diagram of the photovoltaic generating system embodiment five that the application provides, distinguish with embodiment four and be, current transformer 240 in photovoltaic generating system 50 comprises voltage conversion circuit 2202 and transformer 2204, transformer 2204 is parts of current transformer 240, the ac output end of current transformer 240 is in the primary side of transformer 2204, and neutral line device 240 is connected to the output of voltage conversion circuit 2202.
Refer to Fig. 6, for the schematic diagram of the photovoltaic generating system embodiment six that the application provides, photovoltaic generating system 60 is single phase system, the transformer 2206 comprising current transformer 320, be connected to the photovoltaic group string 310 of current transformer 320 direct-flow input end, be connected to current transformer 320 ac output end, and the voltage compensating device 350 of ac output end being connected to current transformer 320.Transformer 2206 both can be a part for current transformer 320, also can independently device.
The input of voltage compensating device 350 connects L phase and the N phase of current transformer 320 ac output end respectively, and the output of voltage compensating device 350 connects L phase.
The structure of voltage compensating device 350 is with other embodiments of the application, just for different systems, different to the requirement of the design parameter of components and parts in device.
Corresponding to above-described embodiment, the embodiment of the present application additionally provides a kind of voltage compensating device, refers to the description of above-described embodiment.
It should be noted that, the voltage compensating device that the embodiment of the present application provides, both can as independently device, also can as a part for current transformer.
The voltage compensating device that the embodiment of the present application provides and comprise current transformer and the photovoltaic generating system of this device, this voltage compensating device is from the primary side power taking of transformer, the current potential of the arbitrary phase of ac output end of current transformer is controlled by controlling its output voltage, thus lifting photovoltaic group string negative pole current potential is to eliminate the impact of PID, thus improve the useful life of photovoltaic module.It should be noted that, described transformer both can be the middle pressure transformer in large-sized photovoltaic electricity generation system, also can be the isolating transformer in middle-size and small-size photovoltaic generating system, can also be the transformer that current transformer carries; The described neutral line both can be the middle pressure transformer primary side neutral terminal in large-sized photovoltaic electricity generation system, for the system not having neutral terminal, can build neutral line device carry out virtual neutral terminal by electric capacity or resistance.The PID solution that the application provides, structure is simple, and cost is low, goes for multiple occasion.When containing multiple current transformer in photovoltaic generating system, only this voltage compensating device need be set at the ac output end of a current transformer, can reach all current transformers in elimination system connect the PID impact of photovoltaic group string, thus useful life of all photovoltaic modulies in raising system.
The above is only the preferred embodiment of the application, not does any pro forma restriction to the application.Although the application discloses as above with preferred embodiment, but and be not used to limit the application.Any those of ordinary skill in the art, do not departing under technical scheme ambit, the Method and Technology content of above-mentioned announcement all can be utilized to make many possible variations and modification to technical scheme, or be revised as the Equivalent embodiments of equivalent variations.Therefore, every content not departing from technical scheme, the technical spirit of foundation the application, to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belongs in the scope of technical scheme protection.
Claims (13)
1. a photovoltaic generating system, comprise at least one current transformer with direct-flow input end and ac output end, the photovoltaic group string, the transformer that are electrically connected corresponding to the direct-flow input end of described current transformer, described photovoltaic group string comprises at least one photovoltaic module, described transformer comprises primary side and primary side, the ac output end of described primary side and current transformer is electrically connected, it is characterized in that, described photovoltaic generating system also comprises:
Voltage compensating device, controls the current potential of arbitrary phase in ac output end U, V, W phase of described current transformer by the output voltage controlling described voltage compensating device;
Described photovoltaic generating system also comprises neutral line device, the input of described voltage compensating device connects arbitrary phase of the ac output end of described current transformer and one end of described neutral line device, and the other end of described neutral line device is connected with the ac output end of described current transformer; The output of described voltage compensating device connects arbitrary phase of the ac output end of described current transformer; Described neutral line device comprises three resistance, and one end of described resistance links together, and its common point is connected with the input of described voltage compensating device, and the other end of described resistance is connected with three of the ac output end of described current transformer respectively; Or described neutral line device comprises three non-polar electric capacity, and one end of described electric capacity links together, and its common point is connected with the input of described voltage compensating device, the other end of described electric capacity is connected with three of the ac output end of described current transformer respectively.
2. photovoltaic generating system according to claim 1, is characterized in that,
What the output of described voltage compensating device and input were connected with the ac output end of described current transformer is same phase.
3. photovoltaic generating system according to claim 1 and 2, is characterized in that, described transformer is middle pressure transformer.
4. photovoltaic generating system according to claim 1 and 2, is characterized in that, described current transformer comprises voltage conversion circuit, and described transformer is a part for current transformer, and the ac output end of described current transformer is between voltage conversion circuit and transformer.
5. photovoltaic generating system according to claim 1 and 2, is characterized in that, described voltage compensating device comprises alternating current is converted to galvanic voltage transformation module.
6. photovoltaic generating system according to claim 3, is characterized in that, described voltage compensating device comprises alternating current is converted to galvanic voltage transformation module.
7. photovoltaic generating system according to claim 4, is characterized in that, described voltage compensating device comprises alternating current is converted to galvanic voltage transformation module.
8. photovoltaic generating system according to claim 1 and 2, is characterized in that, described voltage compensating device be described at least one there is the part of any one current transformer in the current transformer of direct-flow input end and ac output end.
9. photovoltaic generating system according to claim 3, is characterized in that, described voltage compensating device be described at least one there is the part of any one current transformer in the current transformer of direct-flow input end and ac output end.
10. photovoltaic generating system according to claim 4, is characterized in that, described voltage compensating device be described at least one there is the part of any one current transformer in the current transformer of direct-flow input end and ac output end.
11. photovoltaic generating systems according to claim 5, is characterized in that, described voltage compensating device be described at least one there is the part of any one current transformer in the current transformer of direct-flow input end and ac output end.
12. photovoltaic generating systems according to claim 6, is characterized in that, described voltage compensating device be described at least one there is the part of any one current transformer in the current transformer of direct-flow input end and ac output end.
13. photovoltaic generating systems according to claim 7, is characterized in that, described voltage compensating device be described at least one there is the part of any one current transformer in the current transformer of direct-flow input end and ac output end.
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| CN104065285A (en) * | 2014-03-31 | 2014-09-24 | 华为技术有限公司 | Grid-connected inverter system |
| CN103973217B (en) * | 2014-05-19 | 2017-01-18 | 上能电气股份有限公司 | Device for restraining PID effect of photovoltaic panel |
| CN106786750B (en) * | 2016-12-27 | 2019-08-13 | 阳光电源股份有限公司 | Photovoltaic parallel in system and photovoltaic combining inverter |
| CN106849167B (en) | 2017-03-06 | 2020-03-20 | 华为技术有限公司 | Power supply system and power supply method |
| CN115085263A (en) * | 2020-07-24 | 2022-09-20 | 华为数字能源技术有限公司 | Inverter and photovoltaic power generation system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102273039A (en) * | 2008-11-07 | 2011-12-07 | 丹佛斯太阳能变极器有限公司 | Photovoltaic power plant having an offset voltage source controlling the DC potential at the inverter output |
| CN103023344A (en) * | 2012-12-25 | 2013-04-03 | 珠海万力达电气股份有限公司 | Universal smart grid power electronic device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1971018A1 (en) * | 2007-03-13 | 2008-09-17 | SMA Solar Technology AG | Switching device for transformerless conversion of a direct voltage into an alternating voltage with two DC/DC converters and a DC/AC converter |
| CN201178308Y (en) * | 2008-04-25 | 2009-01-07 | 华北电力大学 | Voltage disturbing compensating apparatus |
| CN102866342A (en) * | 2012-09-04 | 2013-01-09 | 欧贝黎新能源科技股份有限公司 | Potential induced attenuation testing method of silicon solar assemblies |
| CN203218893U (en) * | 2013-04-24 | 2013-09-25 | 阳光电源（上海）有限公司 | Device for solving potential induction attenuation |
-
2013
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102273039A (en) * | 2008-11-07 | 2011-12-07 | 丹佛斯太阳能变极器有限公司 | Photovoltaic power plant having an offset voltage source controlling the DC potential at the inverter output |
| CN103023344A (en) * | 2012-12-25 | 2013-04-03 | 珠海万力达电气股份有限公司 | Universal smart grid power electronic device |
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