CN104734548A - Photovoltaic grid-connected inverter and photovoltaic grid-connected inverter control method - Google Patents
Photovoltaic grid-connected inverter and photovoltaic grid-connected inverter control method Download PDFInfo
- Publication number
- CN104734548A CN104734548A CN201510160621.0A CN201510160621A CN104734548A CN 104734548 A CN104734548 A CN 104734548A CN 201510160621 A CN201510160621 A CN 201510160621A CN 104734548 A CN104734548 A CN 104734548A
- Authority
- CN
- China
- Prior art keywords
- converter
- output
- switch pipe
- power switch
- direct current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
- H02M7/4835—Converters with outputs that each can have more than two voltages levels comprising two or more cells, each including a switchable capacitor, the capacitors having a nominal charge voltage which corresponds to a given fraction of the input voltage, and the capacitors being selectively connected in series to determine the instantaneous output voltage
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Dc-Dc Converters (AREA)
Abstract
The embodiment of the invention discloses a photovoltaic grid-connected inverter and a photovoltaic grid-connected inverter control method, and the photovoltaic grid-connected inverter and the photovoltaic grid-connected inverter control method are used for improving the efficiency of a photovoltaic power generation system. The photovoltaic grid-connected inverter comprises a plurality of DC-DC converters, a DC-AC converter, a plurality of independent MPPT controllers and a concentrated MPPT controller. The independent MPPT controllers correspond to the DC-DC converters one by one. The independent MPPT controllers are used for achieving control over the input power of the DC-DC converters. The concentrated MPPT controller corresponds to the DC-AC converter. The concentrated MPPT controller is used for achieving control over the operation state of the DC-DC converters and the output power of the DC-AC converter. The output ends of the DC-DC converters are connected with the input end of the DC-AC converter after being connected in parallel. According to the photovoltaic grid-connected inverter and the photovoltaic grid-connected inverter control method, the concentrated MPPT controller can achieve control over the operation state of the DC-DC converters and the output power of the photovoltaic grid-connected inverter, and the efficiency of the photovoltaic power generation system is improved.
Description
Technical field
The present invention relates to industrial control field, particularly relate to the control method of photovoltaic combining inverter and photovoltaic combining inverter.
Background technology
Grid-connected photovoltaic system is mainly made up of photovoltaic array and combining inverter, the direct current that photovoltaic module produces directly accesses public electric wire net after combining inverter converts the alternating current meeting utility grid requirement to, combining inverter has photovoltaic module MPPT maximum power point tracking (MPPT) and networking Current Control function, as shown in Figure 1, generally speaking, photovoltaic combining inverter passes through and DC-AC conversion just can realize above-mentioned two kinds of functions, but, photovoltaic array is connected by multiple photovoltaic module to form group string, be made up of the connection in series-parallel of multiple photovoltaic group again, and the component mismatch of objective reality, reduce the energy output of photovoltaic generating system to a certain extent, for this reason, more independent MPPT is adopted to follow the tracks of multiple photovoltaic group string respectively, component mismatch loss can be effectively reduced, and the assembly that single MPPT follows the tracks of is fewer, component mismatch loss is lower.
Existing a kind of scheme realizing multiple MPPT as shown in Figure 2, photovoltaic combining inverter adopts Two Stages, the multiple DC-DC converter of prime, rear class DC-AC converter, wherein DC-DC converter achieves independent MPPT function, and DC-AC converter achieves parallel network reverse function, there are at least two independent MPPT in this circuit topology, compared with adopting the photovoltaic combining inverter of one-stage transfor-mation, decrease the loss of component mismatch, the maximum function that improve photovoltaic array exports.
But, this photovoltaic combining inverter, due to the operation of DC-DC converter, need through PWM copped wave, corresponding components and parts can produce loss, and may there is the components and parts power loss increased due to PWM copped wave and be greater than the situation of loss because photovoltaic module mismatch produces, namely the operation of DC-DC converter reduces the power output of photovoltaic combining inverter on the contrary, namely reduce the conversion efficiency of photovoltaic combining inverter, make the decline of grid-connected photovoltaic system efficiency.
Summary of the invention
Embodiments provide a kind of photovoltaic combining inverter, for improving the efficiency of photovoltaic generating system.
In view of this, first aspect present invention provides a kind of photovoltaic combining inverter, comprising:
Multiple DC-DC converter, DC-AC converter, multiple independent MPPT controller and a concentrated MPPT controller;
Described multiple independent MPPT controller and described multiple DC-DC converter one_to_one corresponding, described independent MPPT controller is for realizing the control to described DC-DC converter input power;
Described concentrated MPPT controller is corresponding with described DC-AC converter, and described concentrated MPPT controller is for realizing the control of running status to described DC-DC converter and described DC-AC converter power output;
After the output parallel connection of described multiple DC-DC converter, be connected with the input of described DC-AC converter.
Alternatively:
Described DC-DC converter is Boost type DC-DC converter, and described DC-AC converter is full-bridge inverter.
Alternatively:
Described DC-DC converter comprises direct current first input end DC1, direct current second input DC2, the first electric capacity C1, the second electric capacity C2, the first inductance L 1, first power switch pipe Q1, the first diode (D1), direct current first output 1 and direct current second output 2;
The two ends of described first electric capacity C1 are connected with described direct current first input end DC1 and direct current second input DC2 respectively; Described direct current first input end DC1 is connected by the anode of described first inductance L 1 with described first diode D1, and the anode of the first diode D1 is connected with the collector electrode of described first power switch pipe Q1; The negative electrode of described first diode D1 is connected with described direct current first output 1; Described direct current second input DC2 is connected with the emitter of described first power switch pipe Q1; The emitter of described first power switch pipe Q1 is connected with described direct current second output 2;
The two ends of described second electric capacity C2 are connected with described direct current first output 1 and direct current second output 2 respectively;
Described DC-AC converter comprises inversion first input end 3, inversion second input the 4, the 3rd electric capacity C3, the 4th electric capacity C4, the second power switch pipe Q2) the 3rd power switch pipe Q3) the 4th power switch pipe Q4, the 5th power switch pipe Q5, the second inductance L 2, the 3rd inductance L 3, exchange the first output terminals A C1 and exchange the second output terminals A C2;
Described inversion first input end 3 and inversion second input 4 are connected with described direct current first output 1 and direct current second output 2 respectively; The two ends of described 3rd electric capacity C3 are connected with described inversion first input end 3 and inversion second input 4 respectively; The collector electrode of described second power switch pipe Q2 and the 3rd power switch pipe Q3 is connected with described inversion first input end 3 respectively; The emitter of described second power switch pipe Q2 and the 3rd power switch pipe Q3 is connected with the collector electrode of described 4th power switch pipe Q4 and the 5th power switch pipe Q5 respectively; The emitter of described 4th power switch pipe Q4 and the 5th power switch pipe Q5 is connected with described inversion second input 4 respectively; The emitter of described second power switch pipe Q2 is connected with the first end of described second inductance L 2; Second end of described second inductance L 2 is connected with the described first output terminals A C1 that exchanges; The emitter of described 3rd power switch pipe Q3 is connected with the first end of described 3rd inductance L 3; Second end of described 3rd inductance (L3) is connected with the described second output terminals A C2 that exchanges; The two ends of described 4th electric capacity C4 exchange the first output terminals A C1 with described respectively and exchange the second output terminals A C2 and are connected.
Alternatively:
Described DC-DC converter is two Boost type DC-DC converter, and described DC-AC converter is tri-level half-bridge inverter.
Alternatively:
Described DC-DC converter comprises direct current first input end (DC1), direct current second input (DC2), the first electric capacity C1 first inductance L 1, second inductance L 2, first power switch pipe Q1, the second power switch pipe Q2, the first diode D1, the second diode D2, direct current first output 1 and direct current second output 2)
The two ends of described first electric capacity C1 are connected with described direct current first input end DC1 and direct current second input DC2 respectively; Described direct current first input end DC1 is connected by the anode of described first inductance L 1 with described first diode D1, and the negative electrode of described first diode D1 is connected with described direct current first output 1; The anode of described first diode D1 is connected with the collector electrode of described first power switch pipe Q1; The emitter of described first power switch pipe Q1 is connected with the collector electrode of described second power switch pipe Q2; Described direct current second input DC2 is connected by the negative electrode of described second inductance L 2 with described second diode D2, and the negative electrode of described second diode D2 is connected with the emitter of described second power switch pipe Q2; The anode of described second diode D2 is connected with described front direct current second output 2;
Described DC-AC converter comprises inversion first input end 3, inversion second input 4, second electric capacity C2, the 3rd electric capacity C3, the 3rd power switch pipe Q3, the 4th power switch pipe Q4, the 5th power switch pipe Q5, the 6th power switch pipe Q6, the 3rd inductance L 3, the 4th electric capacity C4, exchanges the first output and exchange the second output;
Described inversion first input end 3 and inversion second input 4 are connected with described direct current first output 1 and direct current second output 2 respectively; The first end of described second electric capacity C2 and the collector electrode of described 3rd power switch pipe Q3 are connected with described inversion first input end 3 respectively; Second end of described second electric capacity C2 is connected with the first end of described 3rd electric capacity C3, and described second electric capacity C2 is connected with the collector electrode of described 5th power switch pipe Q5 with the tie point of the 3rd electric capacity C3; The emitter of described 5th power switch pipe Q5 is connected with the emitter of described 6th power switch pipe Q6; Second end of described 3rd electric capacity C3 and the emitter of described 4th power switch pipe Q4 are connected with described inversion second input 4; The emitter of described 3rd power switch pipe Q3 is connected with the collector electrode of the collector electrode of described 4th power switch pipe Q4, described 6th power switch pipe Q6 and the first end of described 3rd inductance L 3; Second end of described 3rd inductance L 3 is connected with the described first output terminals A C1 that exchanges; The two ends of described 4th electric capacity C4 exchange the first output terminals A C1 with described respectively and exchange the second output terminals A C2 and are connected; Described interchange second output terminals A C2 ground connection.
Alternatively:
Described DC-DC converter also comprises the by-pass switch for bypass DC-DC converter, the first end of described by-pass switch is connected with the direct current first input end of described DC-DC converter, and the second end of described by-pass switch is connected with direct current first output of described DC-DC converter.
Alternatively:
Described by-pass switch is diode, contactor or relay.
Alternatively:
Comprise:
Obtain the present output power P0 of photovoltaic combining inverter in running;
Increase at least one DC-DC converter run in photovoltaic combining inverter, and obtain the present output power P1 of now described photovoltaic combining inverter;
If described power output P1 is less than described power output P0, then the described DC – DC converter increasing operation out of service.
Alternatively:
When photovoltaic DC-to-AC converter starts, regulate the input voltage of DC-AC converter in photovoltaic combining inverter, make the input power of at least one DC-DC converter in photovoltaic combining inverter in multiple DC-DC converter maximum, now the power output of photovoltaic combining inverter is P0.
Alternatively:
Described method also comprises:
If described power output P1 is not less than described power output P0, then controls described photovoltaic combining inverter and operate in the state that power output is P1.
As can be seen from the above technical solutions, the embodiment of the present invention has the following advantages: photovoltaic combining inverter comprises multiple DC-DC converter and a DC-AC converter, the all corresponding independent MPPT controller of each DC-DC converter, the control to this DC-DC converter input power can be realized, and DC-AC converter correspondence concentrates MPPT controller, the control of running status to DC-DC converter and photovoltaic combining inverter power output can be realized, namely concentrate MPPT controller can controlling run DC-DC converter, and after DC-DC converter is run, if the power output of photovoltaic combining inverter declines, then concentrate MPPT controller this DC-DC converter out of service, avoid DC-DC converter run in may due to copped wave loss be greater than due to photovoltaic module mismatch produce loss time, make the situation that photovoltaic combining inverter power output declines, thus improve the efficiency of whole photovoltaic generating system.
Accompanying drawing explanation
Fig. 1 is an embodiment schematic diagram of photovoltaic combining inverter in the embodiment of the present invention;
Fig. 2 is another embodiment schematic diagram of photovoltaic combining inverter in the embodiment of the present invention;
Fig. 3 is another embodiment schematic diagram of photovoltaic combining inverter in the embodiment of the present invention;
Fig. 4 is the schematic diagram of the climbing method that in the embodiment of the present invention, photovoltaic combining inverter adopts;
Fig. 5 is an embodiment flow chart of the control method of photovoltaic combining inverter in the embodiment of the present invention;
Fig. 6 is another embodiment flow chart of the control method of photovoltaic combining inverter in the embodiment of the present invention.
Embodiment
Embodiments provide a kind of photovoltaic combining inverter, for improving the efficiency of photovoltaic generating system.
The present invention program is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a part of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, should belong to the scope of protection of the invention.
Term " first ", " second ", " the 3rd " " 4th " etc. (if existence) in specification of the present invention and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.The embodiments described herein should be appreciated that the data used like this can be exchanged in the appropriate case, so that can be implemented with the order except the content except here diagram or description.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, such as, contain those steps or unit that the process of series of steps or unit, method, system, product or equipment is not necessarily limited to clearly list, but can comprise clearly do not list or for intrinsic other step of these processes, method, product or equipment or unit.
Refer to Fig. 1, in the embodiment of the present invention, an embodiment of photovoltaic combining inverter comprises:
Multiple DC-DC converter 101, DC-AC converter 102, multiple independent MPPT controller 103 and a concentrated MPPT controller 104;
Multiple independent MPPT controller 101 and multiple DC-DC converter 103 one_to_one corresponding, independent MPPT controller 103 is for realizing the control to DC-DC converter 101 input power;
Concentrate MPPT controller 104 corresponding with DC-AC converter 102, concentrated MPPT controller 104 is for realizing the control of running status to DC-DC converter 102 and DC-AC converter 102 power output;
The output-parallel of multiple DC-DC converter 101 connects, and is connected in series with DC-AC converter 102.
In the present embodiment, multiple DC-DC converter 101 can also be provided with by-pass switch, and for this DC-DC converter of bypass, this by-pass switch can be diode, relay or contactor, does not specifically limit herein.
It should be noted that, in the present embodiment and subsequent embodiment, the function of independent MPPT controller and concentrated MPPT controller can realize within a processor, processor mentioned here can be DSP, also can be other processors or control chip, specifically do not limit, in subsequent embodiment, second part does not repeat no more herein.
It should be noted that, in actual applications, the input of photovoltaic combining inverter is provided by photovoltaic array, and the direct current that each photovoltaic array branch road produces is respectively as the input of a DC-DC converter in photovoltaic combining inverter, in subsequent embodiment, repeat no more.
In the present embodiment, photovoltaic combining inverter comprises multiple DC-DC converter and a DC-AC converter, the all corresponding independent MPPT controller of each DC-DC converter, the control to this DC-DC converter input power can be realized, and DC-AC converter correspondence concentrates MPPT controller, concentrated MPPT controller can realize the control of running status to DC-DC converter and photovoltaic combining inverter power output, namely MPPT controller is concentrated can to control to close or run DC-DC converter, and the change of the power output of photovoltaic combining inverter determines whether to run this DC-DC converter before and after running according to DC-DC converter, particularly, if the power output of photovoltaic combining inverter declines after running this DC-DC converter, then concentrate MPPT controller this DC-DC converter out of service, avoid DC-DC converter run in may due to copped wave loss be greater than due to photovoltaic module mismatch produce loss time, make the situation that photovoltaic combining inverter power output declines, thus improve the efficiency of whole photovoltaic generating system.
In actual applications, DC-DC converter and the DC-AC converter of photovoltaic combining inverter can have multiple realization mode, are described respectively below:
One, DC-DC converter is Boost type DC-DC converter, and DC-AC converter is full-bridge inverter;
Refer to Fig. 2, in the embodiment of the present invention, another embodiment of photovoltaic combining inverter comprises:
Multiple DC-DC converter 201, DC-AC converter 202;
DC-DC converter 201 comprises direct current first input end DC1, direct current second input DC2, the first electric capacity C1, the second electric capacity C2, the first inductance L 1, first power switch pipe Q1, the first diode D1, direct current first output 1 and direct current second output 2;
The two ends of the first electric capacity C1 are connected with direct current first input end DC1 and direct current second input DC2 respectively; Direct current first input end DC1 is connected by the anode of the first inductance L 1 with the first diode D1, and the anode of the first diode D1 is connected with the collector electrode of the first power switch pipe Q1; The negative electrode of the first diode D1 is connected with direct current first output 1; Direct current second input DC2 is connected with the emitter of the first power switch pipe Q1; The emitter of the first power switch pipe Q1 is connected with direct current second output 2;
The two ends of the second electric capacity C2 are connected with direct current first output 1 and direct current second output 2 respectively;
DC-AC converter comprises inversion first input end 3, inversion second input the 4, the 3rd electric capacity C3, the 4th electric capacity C4, the second power switch pipe Q2, the 3rd power switch pipe Q3, the 4th power switch pipe Q4, the 5th power switch pipe Q5, the second inductance L 2, the 3rd inductance L 3, exchanges the first output terminals A C1 and exchange the second output terminals A C2;
Inversion first input end 3 and inversion second input 4 are connected with direct current first output 1 and direct current second output 2 respectively; The two ends of the 3rd electric capacity C3 are connected with inversion first input end 3 and inversion second input 4 respectively; The collector electrode of the second power switch pipe Q2 and the 3rd power switch pipe Q3 is connected with inversion first input end 3 respectively; The emitter of the second power switch pipe Q2 and the 3rd power switch pipe Q3 is connected with the collector electrode of the 4th power switch pipe Q4 and the 5th power switch pipe Q5 respectively; The emitter of the 4th power switch pipe Q4 and the 5th power switch pipe Q5 is connected with inversion second input 4 respectively; The emitter of the second power switch pipe Q2 is connected with the first end of the second inductance L 2; Second end of the second inductance L 2 with exchange the first output terminals A C1 and be connected; The emitter of the 3rd power switch pipe Q3 is connected with the first end of the 3rd inductance L 3; Second end of the 3rd inductance L 3 with exchange the second output terminals A C2 and be connected; The two ends of the 4th electric capacity C4 exchange the first output terminals A C1 with described respectively and exchange the second output terminals A C2 and are connected.
In the present embodiment, the direct current two ends that the direct current first input end of each DC-DC converter and direct current second input produce with a photovoltaic array branch road are respectively connected.
It should be noted that, in the present embodiment, DC-DC converter can also be provided with the by-pass switch for bypass DC-DC converter, the first end of this by-pass switch is connected with the direct current first input end of DC-DC converter, and the second end of by-pass switch is connected with direct current first output of DC-DC converter; In actual applications, by-pass switch can be diode or relay, for reducing on-state loss, can be also contactor, may be used for big current occasion, can also be other switching devices, specifically not limit herein.
In the present embodiment, photovoltaic combining inverter comprises multiple DC-DC converter and a DC-AC converter, the all corresponding independent MPPT controller of each DC-DC converter, the control to this DC-DC converter input power can be realized, and DC-AC converter correspondence concentrates MPPT controller, concentrated MPPT controller can realize the control of running status to DC-DC converter and photovoltaic combining inverter power output, namely MPPT controller is concentrated can to control to close or run DC-DC converter, and the change of the power output of photovoltaic combining inverter determines whether to run this DC-DC converter before and after running according to DC-DC converter, particularly, if the power output of photovoltaic combining inverter declines after running this DC-DC converter, then concentrate MPPT controller this DC-DC converter out of service, avoid DC-DC converter run in may due to copped wave loss be greater than due to photovoltaic module mismatch produce loss time, make the situation that photovoltaic combining inverter power output declines, thus improve the efficiency of whole photovoltaic generating system.
Two, DC-DC converter is two Boost type DC-DC converter, and DC-AC converter is tri-level half-bridge inverter;
Refer to Fig. 3, in the embodiment of the present invention, another embodiment of photovoltaic combining inverter comprises:
Multiple DC-DC converter 301, DC-AC converter 302;
DC-DC converter comprises direct current first input end DC1, direct current second input DC2, the first electric capacity C1 first inductance L 1, second inductance L 2, first power switch pipe Q1, the second power switch pipe Q2, the first diode D1, the second diode D2, direct current first output 1 and direct current second output 2;
The two ends of the first electric capacity (C1) are connected with direct current first input end DC1 and direct current second input DC2 respectively; Direct current first input end DC1 is connected by the anode of the first inductance L 1 with the first diode D1, and the negative electrode of the first diode D1 is connected with direct current first output 1; The anode of the first diode D1 is connected with the collector electrode of the first power switch pipe Q1; The emitter of the first power switch pipe Q1 is connected with the collector electrode of the second power switch pipe Q2; Direct current second input DC2 is connected by the negative electrode of the second inductance L 2 with the second diode D2, and the negative electrode of described second diode D2 is connected with the emitter of described second power switch pipe Q2; The anode of described second diode D2 is connected with described front direct current second output 2;
DC-AC converter comprises inversion first input end 3, inversion second input (4), the second electric capacity C2, the 3rd electric capacity C3, the 3rd power switch pipe Q3, the 4th power switch pipe Q4, the 5th power switch pipe Q5, the 6th power switch pipe Q6, the 3rd inductance L 3, the 4th electric capacity C4, exchanges the first output and exchange the second output;
Inversion first input end 3 and inversion second input 4 are connected with direct current first output 1 and direct current second output 2 respectively; The first end of the second electric capacity C2 and the collector electrode of the 3rd power switch pipe Q3 are connected with inversion first input end 3 respectively; Second end of the second electric capacity C2 is connected with the first end of the 3rd electric capacity C3, and the second electric capacity C2 is connected with the collector electrode of the 5th power switch pipe Q5 with the tie point of the 3rd electric capacity C3; The emitter of the 5th power switch pipe Q5 is connected with the emitter of the 6th power switch pipe Q6; Second end of the 3rd electric capacity C3 and the emitter of the 4th power switch pipe Q4 are connected with inversion second input 4; The emitter of the 3rd power switch pipe Q3 is connected with the collector electrode of the collector electrode of the 4th power switch pipe Q4, the 6th power switch pipe Q6 and the first end of described 3rd inductance 3; Second end of the 3rd inductance L 3 with exchange the first output terminals A C1 and be connected; The two ends of the 4th electric capacity C4 are connected with exchanging the first output terminals A C1 and exchange the second output terminals A C2 respectively; Exchange the second output terminals A C2 ground connection.
It should be noted that, in actual applications, the emitter of the first power switch pipe Q1 and the grounded collector of the second power switch pipe Q2 in first DC-DC converter, draw contact point between the emitter of the first power switch pipe Q1 and the collector electrode of the second power switch pipe Q2 in all the other multiple DC-DC converter and be connected with the collector electrode of the 5th power switch pipe Q5 in DC-AC converter.
In the present embodiment, the direct current two ends that the direct current first input end of each DC-DC converter and direct current second input produce with a photovoltaic array branch road are respectively connected.
It should be noted that, in the present embodiment, DC-DC converter can also be provided with the by-pass switch for bypass DC-DC converter, the first end of this by-pass switch is connected with the direct current first input end of DC-DC converter, and the second end of by-pass switch is connected with direct current first output of DC-DC converter; In actual applications, by-pass switch can be diode or relay, for reducing on-state loss, can be also contactor, may be used for big current occasion, can also be other switching devices, specifically not limit herein.
In the present embodiment, photovoltaic combining inverter comprises multiple DC-DC converter and a DC-AC converter, the all corresponding independent MPPT controller of each DC-DC converter, the control to this DC-DC converter input power can be realized, and DC-AC converter correspondence concentrates MPPT controller, concentrated MPPT controller can realize the control of running status to DC-DC converter and photovoltaic combining inverter power output, namely MPPT controller is concentrated can to control to close or run DC-DC converter, and the change of the power output of photovoltaic combining inverter determines whether to run this DC-DC converter before and after running according to DC-DC converter, particularly, if the power output of photovoltaic combining inverter declines after running this DC-DC converter, then concentrate MPPT controller this DC-DC converter out of service, avoid DC-DC converter run in may due to copped wave loss be greater than due to photovoltaic module mismatch produce loss time, make the situation that photovoltaic combining inverter power output declines, thus improve the efficiency of whole photovoltaic generating system.
In the embodiment of the present invention, photovoltaic combining inverter is by realizing MPPT maximum power point tracking in conjunction with climbing method (i.e. disturbance observation), for ease of understanding, below in conjunction with the photovoltaic combining inverter in the embodiment of the present invention, climbing method embody rule is in embodiments of the present invention described:
The climbing method used in the embodiment of the present invention is one of method comparatively commonly used in MPPT algorithm, and with photovoltaic array output voltage for disturbance variable, the state after being stablized by closed loop feedback judges perturbation direction.Refer to Fig. 4, and composition graphs 2 or the photovoltaic combining inverter shown in Fig. 3, when supposing that the characteristic of two-way photovoltaic array branch road is inconsistent, branch road 1 is when output voltage U1_max, reach maximum power point P1_max, branch road 2, when output voltage U2_max, reaches maximum power point P2_max.The output voltage U1 of the DC-DC converter of the branch road 1 when the DC-DC converter of branch road 1 and branch road 2 does not all work, the pass of the output voltage U2 of the DC-DC converter of branch road 2 and the input voltage U3 of DC-AC converter is U1=U2=U3, (voltage U 3 is reduced) to as U1=U2=U1_max during input voltage U3 disturbance left, the difference △ P1=0 of branch road 1 maximum power and branch road 1 current power, now branch road 1 reaches maximum power, and the difference △ P2 > 0 of branch road 2 maximum power and branch road 2 current power, branch road 2 does not reach maximum power, now photovoltaic combining inverter power output Po1=P1_max+P2_max '-P_loss1, wherein P_loss1 is the loss of DC-AC converter.Now start the DC-DC converter of branch road 2, continue disturbance (minimizing voltage), as voltage U 2=U2_max, △ P2=0, branch road 2 reaches maximum power, now photovoltaic combining inverter power output Po2=P1_max+P2_max-P_loss1-P_loss2.Wherein P_loss2 is the loss of DC-DC converter.If △ Po=Po2-Po1 < 0, close the DC-DC converter in branch road 2; △ Po=Po2-Po1 >=0, maintains the statusquo, and namely maintenance power output is the operating state of the photovoltaic DC-to-AC converter of P1, and particularly, the DC-DC converter of branch road 1 does not work and the DC-DC converter work of branch road 2.
Be understandable that, in actual applications, photovoltaic combining inverter can also realize the algorithm of MPPT maximum power point tracking in conjunction with other, realizes, to the output power of photovoltaic combining inverter in the embodiment of the present invention, specifically not limiting herein.
Be introduced the control method of photovoltaic combining inverter in the present invention below, refer to Fig. 5, in the present invention, an embodiment of the control method of photovoltaic combining inverter comprises:
501, the present output power P0 of photovoltaic combining inverter in operation is obtained;
In the present embodiment, concentrated MPPT controller can obtain the present output power P0 of photovoltaic combining inverter in operation.
It should be noted that, in practical application, because in photovoltaic combining inverter, the power output of DC-AC converter is the power output of photovoltaic combining inverter, thus unified MPPT controls the present output power that can be obtained photovoltaic combining inverter by the power output obtaining DC-AC converter.
502, increase at least one DC-DC converter run in photovoltaic combining inverter, and obtain the present output power P1 of now photovoltaic combining inverter;
In the present embodiment, when after the present output power P0 obtaining photovoltaic combining inverter in operation, concentrate MPPT controller to increase at least one DC-DC converter run in photovoltaic combining inverter, and obtain the present output power P1 of now photovoltaic combining inverter.
It should be noted that, when the power output of DC-AC converter is P0, concentrated MPPT controller can increase operation DC-DC converter, also can increase and run multiple DC-DC converter, specifically not limit herein.
503, judge whether P 1 is less than P0, if so, then perform step 504;
In the present embodiment, when concentrated MPPT controller increases the DC-DC converter run at least one photovoltaic combining inverter, and after obtaining the present output power P1 of now photovoltaic combining inverter, concentrated MPPT controller can judge whether power output P1 is less than power output P 0, if so, then step 504 is performed.
504, this DC – DC converter out of service.
In the present embodiment, when concentrated MPPT controller determination power output P1 is less than power output P0, illustrate to increase and run the power output that this DC-DC converter does not improve DC-AC converter, on the contrary due to the operation of this DC-DC converter, the power output of DC-AC converter is reduced, namely the power output of whole photovoltaic combining inverter is made to reduce, then this concentrated MPPT controller this DC-DC converter out of service.
It should be noted that, in actual applications, if concentrate MPPT controller to judge that power output P1 is not less than power output P0, then concentrate MPPT controller to control described photovoltaic combining inverter and operate in the state that power output is P1.
In the present embodiment, photovoltaic combining inverter comprises multiple DC-DC converter and a DC-AC converter, the all corresponding independent MPPT controller of each DC-DC converter, the control to this DC-DC converter input power can be realized, and DC-AC converter correspondence concentrates MPPT controller, concentrated MPPT controller can realize the control of running status to DC-DC converter and photovoltaic combining inverter power output, namely MPPT controller is concentrated can to control to close or run DC-DC converter, and the change of the power output of photovoltaic combining inverter determines whether to run this DC-DC converter before and after running according to DC-DC converter, particularly, if the power output of photovoltaic combining inverter declines after running this DC-DC converter, then concentrate MPPT controller this DC-DC converter out of service, avoid DC-DC converter run in may due to copped wave loss be greater than due to photovoltaic module mismatch produce loss time, make the situation that photovoltaic combining inverter power output declines, thus improve the efficiency of whole photovoltaic generating system.
Refer to Fig. 6, in the embodiment of the present invention, another embodiment of the control method of photovoltaic combining inverter comprises:
601, the input voltage of DC-AC converter in photovoltaic combining inverter is regulated;
In the present embodiment, when photovoltaic combining inverter starts, concentrated MPPT controller can regulate the input voltage of DC-AC converter in photovoltaic combining inverter, make the input power of at least one DC-DC converter in photovoltaic combining inverter in multiple DC-AC converter maximum, now the power output of photovoltaic combining inverter is P0.
Particularly, when the characteristic of described each photovoltaic array branch road is all not identical, by regulating the input voltage of DC-AC converter, the input power of a DC-DC converter can be made maximum; If when the voltage corresponding to the photovoltaic array branch road maximum power of characteristic identical Qie Zheji road in the photovoltaic array branch road of each photovoltaic array branch road Zhong Ji road is maximum, by regulating the input voltage of DC-AC converter, can the input power of Shi Zheji road DC-DC converter maximum.
602, the present output power P0 of photovoltaic combining inverter in operation is obtained;
In the present embodiment, concentrated MPPT controller can obtain the present output power P0 of photovoltaic combining inverter in operation.
It should be noted that, in practical application, because in photovoltaic combining inverter, the power output of DC-AC converter is the power output of photovoltaic combining inverter, thus unified MPPT controls the present output power that can be obtained photovoltaic combining inverter by the power output obtaining DC-AC converter.
603, increase at least one DC-DC converter run in photovoltaic combining inverter, and obtain the present output power P1 of now photovoltaic combining inverter;
In the present embodiment, when after the present output power P0 obtaining photovoltaic combining inverter in operation, concentrate MPPT controller to increase at least one DC-DC converter run in photovoltaic combining inverter, and obtain the present output power P1 of now photovoltaic combining inverter.
It should be noted that, when the power output of DC-AC converter is P0, concentrated MPPT controller can increase operation DC-DC converter, also can increase and run multiple DC-DC converter, specifically not limit herein.
604, judge whether P 1 is less than P0, if so, then perform step 605, if not, then perform step 606;
In the present embodiment, when concentrated MPPT controller increases at least one DC-DC converter run in photovoltaic combining inverter, and after obtaining the present output power P1 of now photovoltaic combining inverter, concentrated MPPT controller can judge whether power output P1 is less than power output P 0, if, then perform step 605, if not, then perform step 606.
605, this DC – DC converter out of service;
In the present embodiment, when concentrated MPPT controller determination power output P1 is less than power output P0, illustrate and run the power output that this DC-DC converter does not improve DC-AC converter, on the contrary due to the operation of this DC-DC converter, the power output of DC-AC converter is reduced, namely the power output of whole photovoltaic combining inverter is made to reduce, then this concentrated MPPT controller this DC-DC converter out of service.
606, control photovoltaic combining inverter and operate in the state that power output is P1.
In the present embodiment, when concentrated MPPT controller determination power output P1 is not less than power output P0, illustrate that the operation of DC-DC converter can improve the power output of photovoltaic combining inverter, then unified MPPT controls photovoltaic combining inverter and operates in the state that power output is P1.
It should be noted that, in actual applications, if concentrate MPPT controller to judge that power output P1 is not less than power output P0, then concentrate MPPT controller to control described photovoltaic combining inverter and operate in the state that power output is P1.
In the present embodiment, photovoltaic combining inverter comprises multiple DC-DC converter and a DC-AC converter, the all corresponding independent MPPT controller of each DC-DC converter, the control to this DC-DC converter input power can be realized, and DC-AC converter correspondence concentrates MPPT controller, concentrated MPPT controller can realize the control of running status to DC-DC converter and photovoltaic combining inverter power output, namely MPPT controller is concentrated can to control to close or run DC-DC converter, and the change of the power output of photovoltaic combining inverter determines whether to run this DC-DC converter before and after running according to DC-DC converter, particularly, if the power output of photovoltaic combining inverter declines after running this DC-DC converter, then concentrate MPPT controller this DC-DC converter out of service, avoid DC-DC converter run in may due to copped wave loss be greater than due to photovoltaic module mismatch produce loss time, make the situation that photovoltaic combining inverter power output declines, thus improve the efficiency of whole photovoltaic generating system.
Those skilled in the art can be well understood to, and for convenience and simplicity of description, the system of foregoing description, the specific works process of device and unit, with reference to the corresponding process in preceding method embodiment, can not repeat them here.
In several embodiments that the application provides, should be understood that, disclosed system, apparatus and method, can realize by another way.Such as, device embodiment described above is only schematic, such as, the division of described unit, be only a kind of logic function to divide, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of device or unit or communication connection can be electrical, machinery or other form.
The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form of SFU software functional unit also can be adopted to realize.
The above, above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a photovoltaic combining inverter, is characterized in that, comprising:
Multiple DC-DC converter, DC-AC converter, multiple independent MPPT controller and a concentrated MPPT controller;
Described multiple independent MPPT controller and described multiple DC-DC converter one_to_one corresponding, described independent MPPT controller is for realizing the control to described DC-DC converter input power;
Described concentrated MPPT controller is corresponding with described DC-AC converter, and described concentrated MPPT controller is for realizing the control of running status to described DC-DC converter and described DC-AC converter power output;
After the output parallel connection of described multiple DC-DC converter, be connected with the input of described DC-AC converter.
2. photovoltaic combining inverter according to claim 1, is characterized in that, described DC-DC converter is Boost type DC-DC converter, and described DC-AC converter is full-bridge inverter.
3. photovoltaic combining inverter according to claim 1, it is characterized in that, described DC-DC converter comprises direct current first input end (DC1), direct current second input (DC2), the first electric capacity (C1), the second electric capacity (C2), the first inductance (L1), the first power switch pipe (Q1), the first diode (D1), direct current first output (1) and direct current second output (2);
The two ends of described first electric capacity (C1) are connected with described direct current first input end (DC1) and direct current second input (DC2) respectively; Described direct current first input end (DC1) is connected by the anode of described first inductance (L1) with described first diode (D1), and the anode of the first diode (D1) is connected with the collector electrode of described first power switch pipe (Q1); The negative electrode of described first diode (D1) is connected with described direct current first output (1); Described direct current second input (DC2) is connected with the emitter of described first power switch pipe (Q1); The emitter of described first power switch pipe (Q1) is connected with described direct current second output (2);
The two ends of described second electric capacity (C2) are connected with described direct current first output (1) and direct current second output (2) respectively;
Described DC-AC converter comprises inversion first input end (3), inversion second input (4), the 3rd electric capacity (C3), the 4th electric capacity (C4), the second power switch pipe (Q2), the 3rd power switch pipe (Q3), the 4th power switch pipe (Q4), the 5th power switch pipe (Q5), the second inductance (L2), the 3rd inductance (L3), exchanges the first output (AC1) and exchange the second output (AC2);
Described inversion first input end (3) and inversion second input (4) are connected with described direct current first output (1) and direct current second output (2) respectively; The two ends of described 3rd electric capacity (C3) are connected with described inversion first input end (3) and inversion second input (4) respectively; The collector electrode of described second power switch pipe (Q2) and the 3rd power switch pipe (Q3) is connected with described inversion first input end (3) respectively; The emitter of described second power switch pipe (Q2) and the 3rd power switch pipe (Q3) is connected with the collector electrode of described 4th power switch pipe (Q4) and the 5th power switch pipe (Q5) respectively; The emitter of described 4th power switch pipe (Q4) and the 5th power switch pipe (Q5) is connected with described inversion second input (4) respectively; The emitter of described second power switch pipe (Q2) is connected with the first end of described second inductance (L2); Second end of described second inductance (L2) is connected with described the first output (AC1) that exchanges; The emitter of described 3rd power switch pipe (Q3) is connected with the first end of described 3rd inductance (L3); Second end of described 3rd inductance (L3) is connected with described the second output (AC2) that exchanges; The two ends of described 4th electric capacity (C4) exchange the first output (AC1) with described respectively and exchange the second output (AC2) and are connected.
4. photovoltaic combining inverter according to claim 1, is characterized in that, described DC-DC converter is two Boost type DC-DC converter, and described DC-AC converter is tri-level half-bridge inverter.
5. photovoltaic combining inverter according to claim 5, it is characterized in that, described DC-DC converter comprises direct current first input end (DC1), direct current second input (DC2), the first electric capacity (C1) first inductance (L1), the second inductance (L2), the first power switch pipe (Q1), the second power switch pipe (Q2), the first diode (D1), the second diode (D2), direct current first output (1) and direct current second output (2);
The two ends of described first electric capacity (C1) are connected with described direct current first input end (DC1) and direct current second input (DC2) respectively; Described direct current first input end (DC1) is connected by the anode of described first inductance (L1) with described first diode (D1), and the negative electrode of described first diode (D1) is connected with described direct current first output (1); The anode of described first diode (D1) is connected with the collector electrode of described first power switch pipe (Q1); The emitter of described first power switch pipe (Q1) is connected with the collector electrode of described second power switch pipe (Q2); Described direct current second input (DC2) is connected by the negative electrode of described second inductance (L2) with described second diode (D2), and the negative electrode of described second diode (D2) is connected with the emitter of described second power switch pipe (Q2); The anode of described second diode (D2) is connected with described front direct current second output (2);
Described DC-AC converter comprises inversion first input end (3), inversion second input (4), the second electric capacity (C2), the 3rd electric capacity (C3), the 3rd power switch pipe (Q3), the 4th power switch pipe (Q4), the 5th power switch pipe (Q5), the 6th power switch pipe (Q6), the 3rd inductance (L3), the 4th electric capacity (C4), exchanges the first output and exchange the second output;
Described inversion first input end (3) and inversion second input (4) are connected with described direct current first output (1) and direct current second output (2) respectively; The first end of described second electric capacity (C2) and the collector electrode of described 3rd power switch pipe (Q3) are connected with described inversion first input end (3) respectively; Second end of described second electric capacity (C2) is connected with the first end of described 3rd electric capacity (C3), and described second electric capacity (C2) is connected with the collector electrode of described 5th power switch pipe (Q5) with the tie point of the 3rd electric capacity (C3); The emitter of described 5th power switch pipe (Q5) is connected with the emitter of described 6th power switch pipe (Q6); Second end of described 3rd electric capacity (C3) and the emitter of described 4th power switch pipe (Q4) are connected with described inversion second input (4); The emitter of described 3rd power switch pipe (Q3) is connected with the collector electrode of the collector electrode of described 4th power switch pipe (Q4), described 6th power switch pipe (Q6) and the first end of described 3rd inductance (L3); Second end of described 3rd inductance (L3) is connected with described the first output (AC1) that exchanges; The two ends of described 4th electric capacity (C4) exchange the first output (AC1) with described respectively and exchange the second output (AC2) and are connected; Described interchange second output (AC2) ground connection.
6. the photovoltaic combining inverter according to any one of claim 2 to 5, it is characterized in that, described DC-DC converter also comprises the by-pass switch for bypass DC-DC converter, the first end of described by-pass switch is connected with the direct current first input end of described DC-DC converter, and the second end of described by-pass switch is connected with direct current first output of described DC-DC converter.
7. photovoltaic combining inverter according to claim 6, is characterized in that, described by-pass switch is diode, contactor or relay.
8. a control method for photovoltaic combining inverter, is characterized in that, comprising:
Obtain the present output power P0 of photovoltaic combining inverter in running;
Increase at least one DC-DC converter run in photovoltaic combining inverter, and obtain the present output power P1 of now described photovoltaic combining inverter;
If described power output P1 is less than described power output P0, then the described DC – DC converter increasing operation out of service.
9. the control method of photovoltaic combining inverter according to claim 8, it is characterized in that, when photovoltaic DC-to-AC converter starts, regulate the input voltage of DC-AC converter in photovoltaic combining inverter, make the input power of at least one DC-DC converter in photovoltaic combining inverter in multiple DC-DC converter maximum, now the power output of photovoltaic combining inverter is P0.
10. the control method of photovoltaic combining inverter according to claim 8 or claim 9, it is characterized in that, described method also comprises:
If described power output P1 is not less than described power output P0, then controls described photovoltaic combining inverter and operate in the state that power output is P1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510160621.0A CN104734548B (en) | 2015-04-07 | 2015-04-07 | A kind of control method of photovoltaic combining inverter and photovoltaic combining inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510160621.0A CN104734548B (en) | 2015-04-07 | 2015-04-07 | A kind of control method of photovoltaic combining inverter and photovoltaic combining inverter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104734548A true CN104734548A (en) | 2015-06-24 |
| CN104734548B CN104734548B (en) | 2017-11-07 |
Family
ID=53458082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510160621.0A Active CN104734548B (en) | 2015-04-07 | 2015-04-07 | A kind of control method of photovoltaic combining inverter and photovoltaic combining inverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104734548B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105515513A (en) * | 2016-01-29 | 2016-04-20 | 阳光电源股份有限公司 | Photovoltaic inverter and control method thereof |
| CN106300433A (en) * | 2016-11-10 | 2017-01-04 | 阳光电源股份有限公司 | The control method for coordinating of a kind of photovoltaic optimizer and photovoltaic DC-to-AC converter and device |
| CN107979115A (en) * | 2017-12-18 | 2018-05-01 | 厦门科华恒盛股份有限公司 | The maximum power point tracking method, apparatus and equipment of photovoltaic generating system |
| WO2018166165A1 (en) * | 2017-03-13 | 2018-09-20 | 厦门科华恒盛股份有限公司 | Mppt disturbance method for photovoltaic power generation system |
| CN109038780A (en) * | 2018-06-29 | 2018-12-18 | 华为技术有限公司 | A kind of photovoltaic system |
| CN110635509A (en) * | 2019-10-08 | 2019-12-31 | 航天柏克(广东)科技有限公司 | Modular solar energy grid-connected and off-grid inverse control all-in-one machine |
| CN114567018A (en) * | 2022-03-08 | 2022-05-31 | 广州菲利斯太阳能科技有限公司 | Grid-connected inverter with multiple MPPT (maximum power point tracking) circuits and inverter control method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101197547A (en) * | 2006-12-06 | 2008-06-11 | 台达电子工业股份有限公司 | Three-phase synchronization AC generating circuit and its control method |
| CN101304221A (en) * | 2008-06-19 | 2008-11-12 | 江苏津恒能源科技有限公司 | Solar photovoltaic interconnected inverter |
| CN102388522A (en) * | 2009-02-19 | 2012-03-21 | 艾克斯兰能源技术公司 | Power transfer management for local power sources of a grid-tied load |
| CN102437759A (en) * | 2012-01-18 | 2012-05-02 | 朱秋花 | High-efficiency grid inverter circuit |
| CN102447427A (en) * | 2010-09-30 | 2012-05-09 | 雅达电子国际有限公司 | Photovoltaic power systems |
| CN102854912A (en) * | 2012-09-27 | 2013-01-02 | 北京京仪绿能电力***工程有限公司 | Double-line MPPT (Maximum Power Point Tracking) tracking device and method |
| CN102882406A (en) * | 2012-10-19 | 2013-01-16 | 江苏大全凯帆电器股份有限公司 | Control method for neutral-point voltage of bus of 10kW three-phase grid-connected inverter |
| CN103166239A (en) * | 2011-12-09 | 2013-06-19 | 上海康威特吉能源技术有限公司 | Centralized-distributed mixed novel energy power generation system and maximum power point tracking control method |
| CN103490650A (en) * | 2012-06-14 | 2014-01-01 | 江南大学 | Distributed photovoltaic power optimizers and control method |
-
2015
- 2015-04-07 CN CN201510160621.0A patent/CN104734548B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101197547A (en) * | 2006-12-06 | 2008-06-11 | 台达电子工业股份有限公司 | Three-phase synchronization AC generating circuit and its control method |
| CN101304221A (en) * | 2008-06-19 | 2008-11-12 | 江苏津恒能源科技有限公司 | Solar photovoltaic interconnected inverter |
| CN102388522A (en) * | 2009-02-19 | 2012-03-21 | 艾克斯兰能源技术公司 | Power transfer management for local power sources of a grid-tied load |
| CN102447427A (en) * | 2010-09-30 | 2012-05-09 | 雅达电子国际有限公司 | Photovoltaic power systems |
| CN103166239A (en) * | 2011-12-09 | 2013-06-19 | 上海康威特吉能源技术有限公司 | Centralized-distributed mixed novel energy power generation system and maximum power point tracking control method |
| CN102437759A (en) * | 2012-01-18 | 2012-05-02 | 朱秋花 | High-efficiency grid inverter circuit |
| CN103490650A (en) * | 2012-06-14 | 2014-01-01 | 江南大学 | Distributed photovoltaic power optimizers and control method |
| CN102854912A (en) * | 2012-09-27 | 2013-01-02 | 北京京仪绿能电力***工程有限公司 | Double-line MPPT (Maximum Power Point Tracking) tracking device and method |
| CN102882406A (en) * | 2012-10-19 | 2013-01-16 | 江苏大全凯帆电器股份有限公司 | Control method for neutral-point voltage of bus of 10kW three-phase grid-connected inverter |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105515513A (en) * | 2016-01-29 | 2016-04-20 | 阳光电源股份有限公司 | Photovoltaic inverter and control method thereof |
| CN105515513B (en) * | 2016-01-29 | 2018-08-03 | 阳光电源股份有限公司 | A kind of photovoltaic DC-to-AC converter and its control method |
| CN106300433A (en) * | 2016-11-10 | 2017-01-04 | 阳光电源股份有限公司 | The control method for coordinating of a kind of photovoltaic optimizer and photovoltaic DC-to-AC converter and device |
| CN106300433B (en) * | 2016-11-10 | 2019-08-13 | 阳光电源股份有限公司 | A kind of control method for coordinating and device of photovoltaic optimizer and photovoltaic DC-to-AC converter |
| US10637253B2 (en) | 2016-11-10 | 2020-04-28 | Sungrow Power Supply Co., Ltd. | Cooperative control method and device for photovoltaic optimizer and photovoltaic inverter |
| WO2018166165A1 (en) * | 2017-03-13 | 2018-09-20 | 厦门科华恒盛股份有限公司 | Mppt disturbance method for photovoltaic power generation system |
| CN107979115A (en) * | 2017-12-18 | 2018-05-01 | 厦门科华恒盛股份有限公司 | The maximum power point tracking method, apparatus and equipment of photovoltaic generating system |
| CN107979115B (en) * | 2017-12-18 | 2019-08-23 | 科华恒盛股份有限公司 | The maximum power point tracking method, apparatus and equipment of photovoltaic generating system |
| CN109038780A (en) * | 2018-06-29 | 2018-12-18 | 华为技术有限公司 | A kind of photovoltaic system |
| WO2020001051A1 (en) * | 2018-06-29 | 2020-01-02 | 华为技术有限公司 | Photovoltaic system |
| CN110635509A (en) * | 2019-10-08 | 2019-12-31 | 航天柏克(广东)科技有限公司 | Modular solar energy grid-connected and off-grid inverse control all-in-one machine |
| CN114567018A (en) * | 2022-03-08 | 2022-05-31 | 广州菲利斯太阳能科技有限公司 | Grid-connected inverter with multiple MPPT (maximum power point tracking) circuits and inverter control method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104734548B (en) | 2017-11-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104734548A (en) | Photovoltaic grid-connected inverter and photovoltaic grid-connected inverter control method | |
| CN105720857B (en) | A kind of Cascade H bridge inverter and its fault handling method | |
| CN106655794B (en) | A kind of electric power electric transformer and its control method | |
| CN105391329A (en) | Full-bridge type MMC (modular multilevel converter) alternating voltage-boosting operation method | |
| CN102904286B (en) | Grid-connected inverter and control method thereof | |
| CN107039980B (en) | High-voltage direct current power flow controller | |
| CN105517653A (en) | Centralized MPPT exiting and switching method and application thereof | |
| CN107959433A (en) | A kind of inverter and inversion system for suppressing leakage current | |
| CN106451406B (en) | It is a kind of for connecting the flexible switchgear of two direct-flow distribution systems | |
| CN103219749A (en) | Grid-connected photovoltaic power generation system capable of dynamically switching invert units and switching method thereof | |
| CN105337520A (en) | Photovoltaic grid-connected converter, photovoltaic power supply system and electric appliance | |
| CN205195587U (en) | Photovoltaic grid-connected converter, photovoltaic power supply system and electric appliance | |
| CN104993716A (en) | Modular multilevel converter and hybrid double-unit sub-module | |
| CN106911260A (en) | A kind of control method of multi-electrical level inverter, device and inverter | |
| CN115483695A (en) | Group string type battery energy storage system | |
| CN201726334U (en) | Photovoltaic grid-connected inverter | |
| CN113364413B (en) | Intelligent photovoltaic topology conversion power optimization system and control method thereof | |
| Hou et al. | Family of hybrid dc-dc converters for connecting dc current bus and dc voltage bus | |
| CN108899937A (en) | A kind of exchange optimizer system | |
| CN208461700U (en) | A kind of hardware modulation compensated circuit in photovoltaic parallel in system | |
| CN104135225A (en) | Photovoltaic inverter and air conditioner | |
| CN204046508U (en) | Photovoltaic inverter and air conditioner | |
| CN208046465U (en) | A kind of modified is double to clamp submodule and modularization multi-level converter | |
| CN202817788U (en) | Grid-connected photovoltaic power generation system | |
| CN205105134U (en) | Multi-controller system and electric control system used for same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180123 Address after: 518055 Guangdong city of Shenzhen province Nanshan District Taoyuan streets Beihuan Industrial Zone in the high mountain cat No. 7 Building 5 layer 504 Patentee after: Shenzhen yingweiteng Photovoltaic Technology Co. Ltd. Address before: 518055 Nanshan District, Shenzhen Province, Longjing high tech Industrial Park, No. 4 plant on the ground floor, No. Patentee before: Shenzhen Yingweiteng Electric Co., Ltd. |
|
| TR01 | Transfer of patent right |