CN104201983A - Device for lowering potential induction decay - Google Patents
Device for lowering potential induction decay Download PDFInfo
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- CN104201983A CN104201983A CN201410491663.8A CN201410491663A CN104201983A CN 104201983 A CN104201983 A CN 104201983A CN 201410491663 A CN201410491663 A CN 201410491663A CN 104201983 A CN104201983 A CN 104201983A
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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
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Abstract
The invention provides a device for lower potential induction decay. The device applied to photovoltaic system with multiple parallelly-connected inverters comprises an externally-connected solar panel. The externally-connected solar panel is connected to the PV array of the input end of an optional inverter. The inverter connected with the externally-connected solar panel is marked as an externally-connected inverter. The sum of the output voltage of the corresponding PV array of the externally-connected inverter and the output voltage of the externally-connected solar panel is larger than the input voltage of optional one of other (N-1) inverters, wherein N is the number of the parallelly-connected inverters. The anode of the externally-connected solar panel is connected with the cathode of the corresponding PV array of the first inverter or the cathode of the externally-connected solar panel is connected with the anode of the corresponding PV array of the first inverter. The device has the advantages that only an extra small solar panel needs to be added to the single input solar panel, software control is not needed, the device is simple and reliable, convenient to maintain and quite low in relative cost, inverter change is avoided, and batch production of the inverters is facilitated.
Description
Technical field
The present invention relates to photovoltaic power generation equipment technical field, particularly a kind of device that reduces electromotive force induction decay.
Background technology
Electromotive force induction decay (PID, Potential Induced Degradation): make its performance reduction phenomenon on assembly because high pressure is over the ground applied to.This high pressure can be malleation according to different cell panel characteristics, also can be negative pressure, and assembly property declines and shows as open circuit voltage (Voc) decline, the lower degradation of fill factor, curve factor (FF), and this phenomenon can be recovered under back-pressure.
At present, in order to suppress the PID effect of cell panel, the anti-PID technology adopting both at home and abroad mainly contains two schemes:
The first is by lifting electrical network N line voltage (or the virtual N point voltage of lifting), more than indirectly the negative pole PV-of cell panel voltage being over the ground lifted to 0V (ground potential);
The second is by grid bias power supply lifting cell panel negative pole PV-voltage to earth, thereby more than PV-voltage is over the ground lifted to 0V.
Above two schemes needs additional power source, increases cost and the unreliability of system, and the maintenance of ging wrong is inconvenient.
Therefore, those skilled in the art need to provide a kind of device that reduces electromotive force induction decay, can in the time of effective anti-PID, can reduce control difficulty, realize simply, easy to operate, can meet the demand of unit or multimachine device, are beneficial to the batch production of inverter simultaneously.
Therefore, those skilled in the art need to provide a kind of device that reduces electromotive force induction decay, can in the time of effective anti-PID, can reduce control difficulty, realize simple, easy to operate.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of device that reduces electromotive force induction decay, in the time of can effective anti-PID, realizes easy to operately, controls simple advantage.
The invention provides a kind of device that reduces electromotive force induction decay, be applied to, in the photovoltaic system of many inverter parallels, comprising: external connection battery plate;
Described external connection battery plate comprises at least one cell panel;
Described external connection battery plate is connected on the PV array of any inverter input terminal in described many inverters; Inverter corresponding to PV array that note connects described external connection battery plate is external inverter;
The output voltage of the PV array that described external inverter is corresponding and the output voltage sum of described external connection battery plate are greater than the input voltage of any inverter in other (N-1) platform inverters; N is the number of inverter in parallel;
The positive pole of described external connection battery plate connects the negative pole of the PV array that described the first inverter is corresponding;
Or,
The negative pole of described external connection battery plate connects the positive pole of the PV array that described the first inverter is corresponding.
Preferably, when the positive pole of described external connection battery plate connects the negative pole of the PV array that described the first inverter is corresponding, the earthing mode of the negative pole of described external connection battery plate is with lower any one or wherein several combination: directly ground connection, by positive temperature coefficient PTC thermistor ground connection, by series resistance ground connection, by fusible link ground connection, by diode ground connection, by switch ground connection;
When the negative pole of described external connection battery plate connects PV array that described the first inverter is corresponding anodal, the anodal earthing mode of described external connection battery plate is with lower any one or wherein several combination: directly ground connection, by positive temperature coefficient PTC thermistor ground connection, by series resistance ground connection, by fusible link ground connection, by diode ground connection, by switch ground connection.
Preferably, unsettled between the positive pole of described external connection battery plate and negative pole or connection load;
When connecting load between the positive pole of described external connection battery plate and negative pole, this load is impedance or power device or energy-storage travelling wave tube;
When described load is power device, this power device is built in or is placed in corresponding inverter.
Preferably, also comprise isolating transformer;
Described many inverters are non-isolation type inverter, and the output of described many inverters all connects the input of isolating transformer, and the output of described isolating transformer connects electrical network.
Preferably, described inverter is three-phase inverter or single-phase inverter;
When described inverter is single-phase inverter, described isolating transformer is single-phase isolating transformer or is the phase in three-phase isolation transformer.
The embodiment of the present invention also provides a kind of device that reduces electromotive force induction decay, is applied to, in the photovoltaic system of single inverter, comprising: external connection battery plate;
Described external connection battery plate comprises at least one cell panel;
Described external connection battery plate is connected on the PV array of described inverter input terminal;
The positive pole of described external connection battery plate connects the negative pole of the PV array that described inverter is corresponding;
Or,
The negative pole of described external connection battery plate connects the positive pole of the PV array that described inverter is corresponding.
Preferably, when the positive pole of described external connection battery plate connects the negative pole of the PV array that described inverter is corresponding, the earthing mode of the negative pole of described external connection battery plate is with lower any one or wherein several combination: directly ground connection, by positive temperature coefficient PTC thermistor ground connection, by series resistance ground connection, by fusible link ground connection, by diode ground connection, by switch ground connection;
When the negative pole of described external connection battery plate connects PV array that described inverter is corresponding anodal, the anodal earthing mode of described external connection battery plate is with lower any one or wherein several combination: directly ground connection, by positive temperature coefficient PTC thermistor ground connection, by series resistance ground connection, by fusible link ground connection, by diode ground connection, by switch ground connection.
Preferably, unsettled between the positive pole of described external connection battery plate and negative pole or connection load;
When connecting load between the positive pole of described external connection battery plate and negative pole, this load is impedance or power device or energy-storage travelling wave tube;
When described load is power device, this power device is built in or is placed in corresponding inverter.
Preferably, described inverter is isolated form inverter, or described inverter is non-isolation type inverter;
When described inverter is non-isolation type inverter, also comprise isolation module; Described isolation module is isolating transformer or isolation capacitance.
Preferably, described isolating transformer is single-phase transformer or is the phase in three-phase transformer.
Compared with prior art, the present invention has the following advantages:
The device of the reduction electromotive force induction decay that the present embodiment provides, the external external connection battery plate of output that only needs a PV array therein, only need to be on the cell panel of the input of separate unit additionally increase a baby battery plate, without any need for software control, implementation is simple and reliable, easy to maintenance, and relative cost is very low, without inverter, make a change, be convenient to inverter batch production.For the inverter of many output-parallels, the present embodiment is by external connection battery plate, the voltage of PV-that makes to connect the PV array of VPVpid is lifted, due to many inverter parallels together, therefore, the lifting of PV-voltage can make the N point voltage of all inverters be improved indirectly, makes the PV-voltage to earth lifting of other machines, and the voltage of ordering higher than GND; For single inverter, because its PV-voltage ratio GND voltage is high, so it possesses anti-PID function.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is device embodiment mono-schematic diagram of reduction electromotive force induction decay provided by the invention;
Fig. 2 is device embodiment bis-schematic diagrames of reduction electromotive force induction decay provided by the invention;
Fig. 3 is device embodiment tri-schematic diagrames of reduction electromotive force induction decay provided by the invention;
Fig. 4 is device embodiment tetra-schematic diagrames of reduction electromotive force induction decay provided by the invention;
Fig. 5 is the single-phase embodiment schematic diagram that Fig. 3 is corresponding;
Fig. 6 is the single-phase embodiment schematic diagram that Fig. 4 is corresponding;
Fig. 7 is device embodiment five schematic diagrames of reduction electromotive force induction decay provided by the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
It should be noted that, the scheme that the embodiment of the present invention provides is applicable in the photovoltaic parallel in system of many inverter parallels, be also applicable in the photovoltaic parallel in system of single inverter, below the situation of many inverter parallels of paper.
Embodiment mono-:
Referring to Fig. 1, this figure is device embodiment mono-schematic diagram of reduction electromotive force induction decay provided by the invention.
The device of the reduction electromotive force induction decay that the present embodiment provides, is applied to, in the photovoltaic system of many inverter parallels, comprising: external connection battery plate PVpid;
Described external connection battery plate PVpid comprises at least one cell panel, and external connection battery plate can be realized for a cell panel, also can realize for the PV group string that polylith cell panel is cascaded, and also can realize for the connection in series-parallel of a plurality of PV group together.
As shown in Figure 1, comprising N (N >=2) platform inverter parallel, is respectively the first inverter Inv1, the second inverter Inv2 ... N inverter InvN.
It should be noted that, the output of the inverter of N platform parallel connection all connects the input of isolating transformer T, and the output of isolating transformer T connects electrical network, realizes parallel network power generation.
Described external connection battery plate PVpid is connected on the PV array of any inverter input terminal in described many inverters; Inverter corresponding to PV array that note connects described external connection battery plate is external inverter;
It should be noted that, external connection battery plate PVpid can connect on the PV array of any inverter input terminal in Inv1-InvN.
The external cell panel PVpid of take in the present embodiment is connected in Inv1 and is introduced as example.
First, for those skilled in the art can more clearly understand technical scheme provided by the invention, below several technical terms are once explained.
Cell panel: the solar panel just referring to;
PV organizes string: refer to polylith cell panel and be cascaded and form PV group string, because the voltage of monoblock battery plate is too little, power is lower, therefore, makes output voltage and power reach requirement after polylith cell panel is together in series.
PV array: refer to the connection in series-parallel of the individual PV group of N (N is greater than 1) together, the voltage of PV array output can directly have been given inverter.
External connection battery plate PVpid: comprise at least one cell panel, this cell panel can be identical for the cell panel that inverter generates electricity in the PV group string of use, and now configuration is the simplest; Yet in order to reduce costs, can be different with the cell panel that inverter generates electricity in the PV group string of use, preferred open circuit voltage is high, and power is low, the cell panel that cost is low.
The output voltage V PVpid sum of the output voltage of the PV array that described external inverter is corresponding and described external connection battery plate PVpid is greater than the input voltage of any inverter in other (N-1) platform inverters; N is the number of inverter in parallel; N is more than or equal to 2 integer;
When PVpid is connected in Inv1, be the output voltage that output voltage V PV1 and the VPVpid sum of the PV array PV1 that Inv1 is corresponding is greater than the PV array that any inverter input terminal in Inv2-InvN is connected, be greater than any one voltage in VPV2-VPVN.
It should be noted that, if meet the big or small condition between above voltage, can be realized by following mode:
Because each PV group string is to be cascaded by polylith cell panel.
The first implementation: the number that the cell panel of series connection in the PV group string that external inverter is corresponding can be set is greater than the number of the cell panel of the series connection in the PV group string that other inverters are corresponding.Cell panel is all identical, and the voltage of each cell panel output is approximately equal.Like this if outside PV array corresponding to external inverter the external connection battery plate of an external small voltage again because the voltage of the PV array being access in itself is higher than the voltage of other PV arrays, so the voltage of external connection battery plate PVpid can be less.
The second implementation: the number of cell panel that the series connection in PV corresponding to all inverters group string can be set is identical, the PV array that so external inverter is corresponding only needs a cell panel external and can realize the magnitude relationship between voltage.Be that external connection battery plate is selected a cell panel.This external connection battery plate can be identical with the type of cell panel in PV array, and the scheme now realizing is like this simplest.Certainly from the angle of cost, consider, this external cell panel PVpid also can be different, and preferably open circuit voltage is high, the cell panel that power is little.
The positive pole of described external connection battery plate connects the negative pole of the PV array that described the first inverter is corresponding; As shown in Figure 1, the anodal negative pole PV-that connects VPV1 of PVpid.This mode, thus be to realize anti-PID function by lifting PV-voltage over the ground.
The reduction electromotive force that the present embodiment provides is induced the device of decay, only needs the external external connection battery plate of output of a PV array therein, only need in cell panel configuration, make lower change, without any need for software control, implementation is simple and reliable, easy to maintenance, and cost is very low.The present embodiment is by external connection battery plate, and the voltage of the PV-of the PV array that connects is lifted, due to many inverter parallels together, therefore, the lifting of PV-voltage can make the N point voltage of all inverters be improved indirectly.
It should be noted that, shown in Fig. 1 is the negative pole that the positive pole of external connection battery plate connects the PV array that described the first inverter is corresponding; Shown in Fig. 2 is the positive pole that the negative pole of external connection battery plate connects the PV array that described the first inverter is corresponding.Be understandable that, no matter be the connection of that mode, when external connection battery plate is connected with PV array, can be direct connection, can be also indirectly to connect, and indirectly connects and for example by switch, connect, by resistance, connect, by diode, connect, by fusible link, connect, or being connected by above several devices.
Embodiment bis-:
Referring to Fig. 2, this figure is device embodiment bis-schematic diagrames of reduction electromotive force induction decay provided by the invention.
The difference of embodiment mono-shown in the present embodiment and Fig. 1 is:
The negative pole of described external connection battery plate connects the positive pole of the PV array that described the first inverter is corresponding.As shown in Figure 2, PVpid negative pole connects the anodal PV+ of VPV1.This mode, be to make PV+ voltage over the ground for negative, thereby making PV+ and PV-is all negative pressure over the ground, thereby realizes anti-PID function.
When the positive pole of described external connection battery plate connects the negative pole of the PV array that described the first inverter is corresponding, as shown in Figure 1, the earthing mode of the negative pole of described external connection battery plate is with lower any one or wherein several combination: directly ground connection, by positive temperature coefficient PTC thermistor ground connection, by series resistance ground connection, by fusible link ground connection, by diode ground connection, by switch ground connection;
It should be noted that, the negative pole of external connection battery plate is ground connection directly, also can pass through PTC thermistor ground connection, also can also can pass through fusible link ground connection by the conventional, electric-resistance ground connection of series connection, also can pass through diode ground connection, pass through switch ground connection.Certainly, can be also the above combination of at least two kinds in several, for example, can be by ground connection again that is cascaded such as PTC thermistor, conventional, electric-resistance, diodes.When described switch is gate-controlled switch, the control signal of this gate-controlled switch can obtain from nearest inverter, because be integrated with controller in inverter.
When the negative pole of described external connection battery plate connects PV array that described the first inverter is corresponding anodal, as shown in Figure 2, the anodal earthing mode of described external connection battery plate is with lower any one or wherein several combination: directly ground connection, by positive temperature coefficient PTC thermistor ground connection, by series resistance ground connection, by fusible link ground connection, by diode ground connection, by switch ground connection.
It should be noted that unsettled or connection load between the positive pole of described external connection battery plate and negative pole;
Can be unsettled between the positive pole of external connection battery plate and negative pole, still, for effective utilization of energy, also can connect load.
When connecting load between the positive pole of described external connection battery plate and negative pole, this load is impedance or power device or energy-storage travelling wave tube;
When described load is power device, this power device is built in or is placed in corresponding inverter.
When described load is impedance, can by impedance, generate heat to carry out the utilization of heat, for example heat up water.
When described load is energy-storage travelling wave tube, this energy-storage travelling wave tube can be storage battery, and can be built in or be placed in corresponding inverter.
It should be noted that, for the photovoltaic parallel in system of many inverter parallels, because the Capacity Ratio of inverter is larger, therefore, the follow-up isolating transformer that needs is isolated.Certainly, this isolating transformer can be integrated with inverter, also can separate setting, makes a plurality of inverters share an isolating transformer.
Be understandable that, in the scheme that above embodiment provides, described inverter is three-phase inverter or single-phase inverter;
When described inverter is single-phase inverter, described isolating transformer is single-phase isolating transformer or is the phase in three-phase isolation transformer.
The device of reduction electromotive force that above embodiment provides induction decay be take many inverter parallels and is introduced as example, introduces the situation that single inverter carries out parallel network power generation below.
Embodiment tri-:
Referring to Fig. 3, this figure is device embodiment tri-schematic diagrames of reduction electromotive force induction decay provided by the invention.
The device of a kind of electromotive force induction decay that the present embodiment provides, is applied to, in single inverter grid-connected, comprising: external connection battery plate PVpid;
Described external connection battery plate PVpid comprises at least one cell panel, and external connection battery plate can be realized for a cell panel, also can realize for the PV group string that polylith cell panel is cascaded, and also can realize for the connection in series-parallel of a plurality of PV group together.
Described external connection battery plate PVpid is connected on the PV array of described inverter Inv input;
Be understandable that, due to corresponding in the present embodiment be only an inverter, therefore, corresponding PV array is also one, only need to be outside PV array an external external connection battery plate again.
It should be noted that, in the present embodiment, inverter Inv is separate unit.
The positive pole of described external connection battery plate PVpid connects the negative pole of the PV array that described inverter Inv is corresponding;
The positive pole of described external connection battery plate connects the negative pole of the PV array that described the first inverter is corresponding; As shown in Figure 1, the anodal negative pole PV-that connects VPV1 of PVpid.This mode, thus be to realize anti-PID function by lifting PV-voltage over the ground.
The device of reduction electromotive force that the present embodiment provides induction decay, only need to be at the output of PV array an external external connection battery plate, only need in cell panel configuration, make and change, without any need for software control, implementation is simple and reliable, easy to maintenance, and cost is very low.The present embodiment is by external connection battery plate, and the voltage of the PV-of the PV array that connects is lifted, and the lifting of PV-voltage can make the N point voltage of all inverters be improved indirectly.
It should be noted that, shown in Fig. 3 is the negative pole that the positive pole of external connection battery plate connects the PV array that described the first inverter is corresponding; Shown in Fig. 4 is the positive pole that the negative pole of external connection battery plate connects the PV array that described the first inverter is corresponding.Be understandable that, no matter be the connection of that mode, when external connection battery plate is connected with PV array, can be direct connection, can be also indirectly to connect, and indirectly connects and for example by switch, connect, by resistance, connect, by diode, connect, by fusible link, connect, or being connected by above several devices.
Embodiment tetra-:
Referring to Fig. 4, this figure is device embodiment tetra-schematic diagrames of reduction electromotive force induction decay provided by the invention.
The difference of embodiment tri-shown in the present embodiment and Fig. 3 is:
The negative pole of described external connection battery plate connects the positive pole of the PV array that described inverter is corresponding.As shown in Figure 4, PVpid negative pole connects the anodal PV+ of VPV1.This mode, be to make PV+ voltage over the ground for negative, thereby making PV+ and PV-is all negative pressure over the ground, thereby realizes anti-PID function.
When the positive pole of described external connection battery plate connects the negative pole of the PV array that described the first inverter is corresponding, as shown in Figure 3, the earthing mode of the negative pole of described external connection battery plate is with lower any one or wherein several combination: directly ground connection, by positive temperature coefficient PTC thermistor ground connection, by series resistance ground connection, by fusible link ground connection, by diode ground connection, by switch ground connection;
It should be noted that, the negative pole of external connection battery plate is ground connection directly, also can pass through PTC thermistor ground connection, also can also can pass through fusible link ground connection by the conventional, electric-resistance ground connection of series connection, also can pass through diode ground connection, pass through switch ground connection.Certainly, can be also the above combination of at least two kinds in several, for example, can be by ground connection again that is cascaded such as PTC thermistor, conventional, electric-resistance, diodes.When described switch is gate-controlled switch, the control signal of this gate-controlled switch can obtain from nearest inverter, because be integrated with controller in inverter.
When the negative pole of described external connection battery plate connects PV array that described the first inverter is corresponding anodal, as shown in Figure 4, the anodal earthing mode of described external connection battery plate is with lower any one or wherein several combination: directly ground connection, by positive temperature coefficient PTC thermistor ground connection, by series resistance ground connection, by fusible link ground connection, by diode ground connection, by switch ground connection.
It should be noted that unsettled or connection load between the positive pole of described external connection battery plate and negative pole;
Can be unsettled between the positive pole of external connection battery plate and negative pole, still, for effective utilization of energy, also can connect load.
When connecting load between the positive pole of described external connection battery plate and negative pole, this load is impedance or power device or energy-storage travelling wave tube;
When described load is power device, this power device is built in or is placed in corresponding inverter.
When described load is impedance, can by impedance, generate heat to carry out the utilization of heat, for example heat up water.
When described load is energy-storage travelling wave tube, this energy-storage travelling wave tube can be storage battery, and can be built in or be placed in corresponding inverter.
It should be noted that, in Fig. 3 and Fig. 4, inverter Inv is non-isolation type inverter, so the output of inverter all connects spacer assembly.
Be understandable that, the situation of comparing many inverter parallels due to the capacity of single inverter is less, and therefore, spacer assembly can be isolating transformer, can be also isolation capacitance.
When spacer assembly is isolating transformer, isolating transformer can be single-phase transformer, can be also the phase in three-phase transformer.
It should be noted that, what Fig. 3 and Fig. 4 were corresponding is three-phase inverter.Fig. 5 and Fig. 6 are single-phase inverters.
Embodiment five:
Referring to Fig. 7, this figure is device embodiment five schematic diagrames of reduction electromotive force induction decay provided by the invention.
In above embodiment, all connected spacer assembly after inverter, and in the present embodiment because inverter itself is isolated form inverter, therefore, do not need afterwards to connect again spacer assembly, now inverter can be also three-phase inverter for single-phase inverter.
As can be seen from Figure 7, after inverter Inv, directly connect electrical network, generate electricity by way of merging two or more grid systems.
The device that the above embodiment of the present invention provides, realizes simply, and it is convenient to control, and does not need inverter to carry out any improvement, facilitates the batch production of inverter.
The above, be only preferred embodiment of the present invention, not the present invention done to any pro forma restriction.Although the present invention discloses as above with preferred embodiment, yet not in order to limit the present invention.Any those of ordinary skill in the art, do not departing from technical solution of the present invention scope situation, all can utilize method and the technology contents of above-mentioned announcement to make many possible changes and modification to technical solution of the present invention, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not depart from technical solution of the present invention,, all still belongs in the scope of technical solution of the present invention protection any simple modification made for any of the above embodiments, equivalent variations and modification according to technical spirit of the present invention.
Claims (10)
1. a device that reduces electromotive force induction decay, is characterized in that, is applied to, in the photovoltaic system of many inverter parallels, comprising: external connection battery plate;
Described external connection battery plate comprises at least one cell panel;
Described external connection battery plate is connected on the PV array of any inverter input terminal in described many inverters; Inverter corresponding to PV array that note connects described external connection battery plate is external inverter;
The output voltage of the PV array that described external inverter is corresponding and the output voltage sum of described external connection battery plate are greater than the input voltage of any inverter in other (N-1) platform inverters; N is the number of inverter in parallel;
The positive pole of described external connection battery plate connects the negative pole of the PV array that described the first inverter is corresponding;
Or,
The negative pole of described external connection battery plate connects the positive pole of the PV array that described the first inverter is corresponding.
2. the device that reduction electromotive force induction according to claim 1 decays, it is characterized in that, when the positive pole of described external connection battery plate connects the negative pole of the PV array that described the first inverter is corresponding, the earthing mode of the negative pole of described external connection battery plate is with lower any one or wherein several combination: directly ground connection, by positive temperature coefficient PTC thermistor ground connection, by series resistance ground connection, by fusible link ground connection, by diode ground connection, by switch ground connection;
When the negative pole of described external connection battery plate connects PV array that described the first inverter is corresponding anodal, the anodal earthing mode of described external connection battery plate is with lower any one or wherein several combination: directly ground connection, by positive temperature coefficient PTC thermistor ground connection, by series resistance ground connection, by fusible link ground connection, by diode ground connection, by switch ground connection.
3. the device of reduction electromotive force induction decay according to claim 1 and 2, is characterized in that, unsettled or connection load between the positive pole of described external connection battery plate and negative pole;
When connecting load between the positive pole of described external connection battery plate and negative pole, this load is impedance or power device or energy-storage travelling wave tube;
When described load is power device, this power device is built in or is placed in corresponding inverter.
4. the device of reduction electromotive force induction decay according to claim 1 and 2, is characterized in that, also comprises isolating transformer;
Described many inverters are non-isolation type inverter, and the output of described many inverters all connects the input of isolating transformer, and the output of described isolating transformer connects electrical network.
5. the device of reduction electromotive force induction decay according to claim 4, is characterized in that, described inverter is three-phase inverter or single-phase inverter;
When described inverter is single-phase inverter, described isolating transformer is single-phase isolating transformer or is the phase in three-phase isolation transformer.
6. a device that reduces electromotive force induction decay, is characterized in that, is applied to, in the photovoltaic system of single inverter, comprising: external connection battery plate;
Described external connection battery plate comprises at least one cell panel;
Described external connection battery plate is connected on the PV array of described inverter input terminal;
The positive pole of described external connection battery plate connects the negative pole of the PV array that described inverter is corresponding;
Or,
The negative pole of described external connection battery plate connects the positive pole of the PV array that described inverter is corresponding.
7. the device that reduction electromotive force induction according to claim 6 decays, it is characterized in that, when the positive pole of described external connection battery plate connects the negative pole of the PV array that described inverter is corresponding, the earthing mode of the negative pole of described external connection battery plate is with lower any one or wherein several combination: directly ground connection, by positive temperature coefficient PTC thermistor ground connection, by series resistance ground connection, by fusible link ground connection, by diode ground connection, by switch ground connection;
When the negative pole of described external connection battery plate connects PV array that described inverter is corresponding anodal, the anodal earthing mode of described external connection battery plate is with lower any one or wherein several combination: directly ground connection, by positive temperature coefficient PTC thermistor ground connection, by series resistance ground connection, by fusible link ground connection, by diode ground connection, by switch ground connection.
8. according to the device of the reduction electromotive force induction decay described in claim 6 or 7, it is characterized in that unsettled or connection load between the positive pole of described external connection battery plate and negative pole;
When connecting load between the positive pole of described external connection battery plate and negative pole, this load is impedance or power device or energy-storage travelling wave tube;
When described load is power device, this power device is built in or is placed in corresponding inverter.
9. according to the device of the reduction electromotive force induction decay described in claim 6 or 7, it is characterized in that, described inverter is isolated form inverter, or described inverter is non-isolation type inverter;
When described inverter is non-isolation type inverter, also comprise isolation module; Described isolation module is isolating transformer or isolation capacitance.
10. the device of reduction electromotive force induction decay according to claim 9, is characterized in that, described isolating transformer is single-phase transformer or is the phase in three-phase transformer.
Priority Applications (1)
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| CN201410491663.8A CN104201983A (en) | 2014-09-23 | 2014-09-23 | Device for lowering potential induction decay |
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Cited By (5)
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| CN104242811A (en) * | 2014-09-24 | 2014-12-24 | 彭书芳 | Photovoltaic power supply system |
| CN105932955A (en) * | 2016-06-03 | 2016-09-07 | 丰郅(上海)新能源科技有限公司 | Device for inhibiting potential induced degradation |
| CN107765094A (en) * | 2017-10-13 | 2018-03-06 | 阳光电源股份有限公司 | A kind of photovoltaic battery panel PID prosthetic devices |
| CN110460097A (en) * | 2019-08-21 | 2019-11-15 | 上海质卫环保科技有限公司 | A kind of pressurizing device applied to multichannel MPPT unit structure inverter |
| CN111602312A (en) * | 2018-01-16 | 2020-08-28 | 株式会社钟化 | Solar power generation system |
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| CN103701150A (en) * | 2013-12-26 | 2014-04-02 | 华为技术有限公司 | Multi-unit parallel circuit, power supply system and voltage regulation method |
| WO2014125602A1 (en) * | 2013-02-14 | 2014-08-21 | サンテックパワージャパン株式会社 | Solar power generation polarization prevention device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104242811A (en) * | 2014-09-24 | 2014-12-24 | 彭书芳 | Photovoltaic power supply system |
| CN105932955A (en) * | 2016-06-03 | 2016-09-07 | 丰郅(上海)新能源科技有限公司 | Device for inhibiting potential induced degradation |
| CN105932955B (en) * | 2016-06-03 | 2020-04-21 | 丰郅(上海)新能源科技有限公司 | Device for inhibiting potential induced attenuation and method for resisting PID |
| CN107765094A (en) * | 2017-10-13 | 2018-03-06 | 阳光电源股份有限公司 | A kind of photovoltaic battery panel PID prosthetic devices |
| CN111602312A (en) * | 2018-01-16 | 2020-08-28 | 株式会社钟化 | Solar power generation system |
| CN111602312B (en) * | 2018-01-16 | 2022-03-04 | 株式会社钟化 | Solar power generation system |
| CN110460097A (en) * | 2019-08-21 | 2019-11-15 | 上海质卫环保科技有限公司 | A kind of pressurizing device applied to multichannel MPPT unit structure inverter |
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Application publication date: 20141210 |