CN205544327U - Direct current steps up and concentrates contravariant photovoltaic power generation system - Google Patents
Direct current steps up and concentrates contravariant photovoltaic power generation system Download PDFInfo
- Publication number
- CN205544327U CN205544327U CN201620176042.5U CN201620176042U CN205544327U CN 205544327 U CN205544327 U CN 205544327U CN 201620176042 U CN201620176042 U CN 201620176042U CN 205544327 U CN205544327 U CN 205544327U
- Authority
- CN
- China
- Prior art keywords
- boosting
- direct current
- cabinet
- input
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000012141 concentrate Substances 0.000 title claims abstract description 24
- 238000010248 power generation Methods 0.000 title abstract 2
- 230000005611 electricity Effects 0.000 claims description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 12
- 229910052802 copper Inorganic materials 0.000 claims description 12
- 239000010949 copper Substances 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 11
- 230000007257 malfunction Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000002159 abnormal effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000000087 stabilizing effect Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 230000005226 mechanical processes and functions Effects 0.000 description 1
- 238000013083 solar photovoltaic technology Methods 0.000 description 1
Classifications
-
- H02J3/383—
-
- 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
- Supply And Distribution Of Alternating Current (AREA)
- Photovoltaic Devices (AREA)
Abstract
The utility model relates to a direct current steps up and concentrates contravariant photovoltaic power generation system, does they direct current step up electrical cell and all includes direct -current input branch road, direct current step up cabinet, DC including the control unit, a plurality of direct current step up electrical cell and a centralized inverter the DC device, two are no less than to the direct -current input branch road, and the output of a plurality of direct -current input branch roads is parallelly connected to insert the step up input of cabinet of direct current, the direct current steps up the cabinet with the output circuit series connection of a plurality of direct -current input branch roads in the cabinet to does the output that return circuit follow direct current stepped up the cabinet export a DC to is the input of DC device respectively with step up electrical cell's DC of each direct current insert centralized inverter's direct current side after each DC cable that the output of DC device is connected is parallelly connected, public well high voltage alternating current net is gone into to centralized inverter's interchange side joint. The utility model discloses simple structure, little, the high -usage of investment, few, with low costs, the easy maintenance of line loss, protect function are strong.
Description
Technical field
This utility model relates to solar photovoltaic technology field, and a kind of DC boosting concentrates inversion photovoltaic generating system.
Background technology
The energy is economy, social development and the important material improved the people's livelihood, and energy problem is the key of a national development.Along with the increase day by day of photovoltaic generation scale, photovoltaic production capacity is no longer limited to as the supplementary energy, and the direction being towards fungible energy source strides forward.But, unbalanced due to economic development and Renewable resource layout, distance between energy centre and the load center of China is very big, and the solar electricity generation field as energy centre is concentrated mainly on remote districts, northwest, and the developed area as load center then concentrates on East Coastal；Meanwhile, solar electrical energy generation needs electrical network to provide extra peak, but the peak modulation capacity of remote districts, northwest is not enough, causes what solar electrical energy generation was faced with large-scale development to send the problem of dissolving outside.Under the influence of this " energy revolution ", the concept of existing photovoltaic generation, the structure of photovoltaic plant, generate electricity by way of merging two or more grid systems device and corresponding running technology more and more unable to do what one wishes at the aspect of dissolving tackling ultra-large renewable new forms of energy.
And current, existing solar photovoltaic generation system, it is to be first low-voltage AC by low-voltage DC by inverter inversion, passes through transformer boost the most again.The photovoltaic module of this solar photovoltaic generation system all uses low-voltage transmission route between transformator, causes low-voltage transmission route long, and line loss is excessive；And often group photovoltaic module corresponding inverter, a transformator, multiple photovoltaic modulies i.e. need multiple inverter and multiple transformator, and its structure is complicated, investment is big, utilization rate is too low；And multiple header boxs take general series system to the circuit of transformator in existing solar photovoltaic generation system, i.e. header box is connected outside transformator two-by-two with header box, when system jam, whole system circuit parts need to be overhauled, be not easy to operation.
Utility model content
For the problems referred to above, this utility model provide a kind of simple structure, invest little, utilization rate is high, line loss is few, low cost, easily maintenance, DC boosting that defencive function is strong concentrate inversion photovoltaic generating system.
nullThe technical scheme that the above-mentioned technical problem of this utility model solution is used is: include control unit、Multiple DC boosting generator units and a centralized inverter，Each DC boosting generator unit all includes a DC boosting cabinet、DC-DC device and multiple direct current input branch road，The positive-negative input end of each direct current input branch road is respectively connecting to the positive-negative output end of the photovoltaic module of this branch road，The positive-negative output end parallel connection of multiple direct currents input branch road accesses the input of DC boosting cabinet，Multichannel positive pole and negative pole that multiple direct currents input branch circuit parallel connection is confluxed in cabinet by described DC boosting cabinet are connected，And export the input to a DC-DC device with primary Ioops from the outfan of DC boosting cabinet，The DC side of centralized inverter is accessed with the outfan of the DC-DC device of each DC boosting generator unit after each direct current cables parallel connection being connected respectively，The AC of described centralized inverter accesses public mesohigh AC network；Each direct current input branch road is provided with detector unit and maximal power tracing unit, and each branch voltage and electric current that described control unit detects according to detector unit control the photovoltaic module of each branch road with maximum power output.One system of described utility model uses a plurality of DC boosting generator unit that can run simultaneously side by side, can low-voltage DC variable flow and variable pressure to solar photovoltaic assembly simultaneously, meet the requirement that demand in the public mesohigh AC network unit interval is big, and use and first multiple low-voltage direct electric boosts are become mesohigh unidirectional current, use the method that mesohigh DC inverter is become the mesohigh alternating current required for electrical network by centralized inverter the most again, make between DC boosting cabinet and inverter, to use the conveying of mesohigh unidirectional current simultaneously, the problem solving the line loss using low-voltage AC conveying to cause in prior art between DC boosting cabinet and inverter, reduce cable cost；And direct current cables is compared ac cable and is had more preferable carrier wave stability, it is possible to decrease the installation requirement of electrical secondary system and input；Meanwhile, multiple direct currents input branch road of described utility model is concentrated and is connected a DC boosting cabinet, solves each direct current input branch road in prior art and connects the boosting problem that cabinet is too much, cost is excessive that a DC boosting cabinet causes；Further, the direct current conflux case of the present invention is different from the general of prior art and connects with the connection of DC boosting cabinet, the outfan of the multiple direct current conflux case of the present invention had accessed the input of DC boosting cabinet before this with parallel way, then in DC boosting cabinet, again the outfan circuit of each direct current conflux case is connected between input and the outfan of DC boosting cabinet, this connected mode is when each DC boosting generator unit breaks down, each parallel line can be detected one by one, see specifically which bar circuit there is a problem, solve once circuit goes wrong, need the problem that each parts of whole system must carry out investigating one by one, reduce the scope of repair, improve efficiency, the most preferably serve and prevent short circuit and the effect of protection；Furthermore, in described utility model each DC boosting generator unit, multiple mesohigh unidirectional currents are concentrated and are connected a DC-DC device, concentrate by a DC-DC device voltage stabilizing, the DC-DC device solving each header box one DC-DC device of connection in prior art and cause is too much, the problem of inefficiency, also solve the problem that Midwest current/voltage long distance transportation is unstable, and overall, described utility model simplifies each parts, centralized management, is easily controlled.
As preferably, described detector unit includes measuring the current detecting unit of described photovoltaic component DC electricity size of current, the voltage detection unit detecting described photovoltaic component DC piezoelectric voltage size and the AD conversion unit for size of current data and voltage swing data are converted into digital signal being connected with described current detecting unit and voltage detection unit；Described control unit determines size of current and the voltage swing of described photovoltaic component DC electricity according to digital signal.
As preferably, described maximal power tracing unit includes booster circuit, the booster circuit of this direct current input branch road is controlled by described control unit according to size of current and the voltage swing of the described photovoltaic component DC electricity determined, until the output voltage of this booster circuit reaches the voltage corresponding to peak power output of the photovoltaic module of this direct current input branch road.
As preferably, described detector unit also includes display unit, to the input block of described control unit input control command with for the alarm unit of alert when described photovoltaic component DC electricity is beyond preset range and/or during other component malfunctions, described display unit is for showing the size of current data of detection, voltage swing data and/or the duty of assembly；Input block can facilitate user control information to be input in joining unit, it is achieved the control to Intelligent photovoltaic combiner box；Fault message and abnormal information can be shown by display unit or send warning by alarm sound by alarm unit, and input block and alarm unit can be turned on and off being controlled by control unit in addition.
As preferably, in each DC boosting generator unit, each direct current input branch road includes photovoltaic group string and the direct current conflux case in parallel with photovoltaic group string, the input of the outfan parallel connection access DC boosting cabinet of described direct current conflux case that the photovoltaic module no less than two is serially connected.The photovoltaic module of described utility model is in series by multiple, makes photovoltaic module can form more photovoltaic energy after receiving solar energy, and be used for boosting generating；The protection of the parallel connection between direct current conflux case and DC boosting cabinet input, beneficially circuit and maintenance.
As preferably, in each DC boosting generator unit, the plurality of direct current conflux case is arranged in order, the outfan of described direct current conflux case is divided into cathode output end and cathode output end, the cathode output end of first direct current conflux case being connected with DC boosting cabinet input in DC boosting cabinet and the cathode output end of last direct current conflux case being connected with DC boosting cabinet input, being connected with the outfan of primary Ioops with DC boosting cabinet, the both positive and negative polarity of the outfan of remaining each adjacent direct current conflux case is connected with each other.It is arranged such, makes multiple mesohigh unidirectional current form a loop output, thus create condition of contact to one DC-DC device of connection.
As preferably, in each DC boosting generator unit, described DC boosting cabinet includes multiple low-voltage direct chopper and copper bar, and the low-voltage DC in multiple direct current conflux cases is delivered to DC-DC device through copper bar after the boosting of DC boosting cabinet, low-voltage direct current limiting of breaker.Described low-voltage direct chopper the effect that can play protection, current limliting, isolation is set; time when the low-voltage DC generation electric current flowed in DC boosting cabinet is excessive, the fault such as line short; dc circuit breaker can its fault current of disjunction rapidly, protect whole DC boosting and concentrate inversion photovoltaic generating system；The setting of copper bar is for general cable, and electric conductivity is high, can faster, safer playing conveying electric current in systems and connect the effect of electrical equipment；And described low-voltage direct chopper is arranged in DC boosting cabinet, can prevent personnel from touching the loss with natural environment.
As preferably, in each DC boosting generator unit, described DC boosting cabinet also includes the dc circuit breaker that input is connected, outfan is connected with DC-DC device with copper bar.On the premise of described system is provided with low-voltage direct chopper, after electric current flows through DC boosting cabinet, system is also provided with a dc circuit breaker, plays double protection, prevents the faults such as mesohigh DC line is short-circuited.
As preferably, described DC-DC device is connected with the DC side of centralized inverter by direct current cables.Direct current cables is compared ac cable and is had more preferable carrier wave stability, it is possible to decrease the installation requirement of electrical secondary system and input.
As preferably, described DC boosting concentrates inversion photovoltaic generating system also to include that former avris is connected with centralized inverter, the booster transformer that secondary side is connected with public mesohigh AC network, described direct current conflux case is installed near the photovoltaic module of its correspondence, so that the length of the low-voltage direct cable between the corresponding photovoltaic module of each direct current conflux case is the shortest；This invention addresses some special occasions and need to access the demand of higher electric pressure.
Accompanying drawing explanation
Fig. 1 is the circuit connection structure schematic diagram of a kind of optimal way of this utility model；
Fig. 2 is physical circuit attachment structure schematic diagram in DC boosting cabinet in DC boosting generator unit described in the utility model；
Fig. 3 is the structured flowchart of a kind of optimal way of this utility model.
Detailed description of the invention
Describing this utility model in detail below in conjunction with Fig. 1, Fig. 2 and Fig. 3, at this, illustrative examples of the present utility model and explanation are used for explaining this utility model, but are not intended as restriction of the present utility model.
It should be noted that, all electric pressures that " mesohigh " (either direct current still exchanges) occurred in this utility model all covers between 3kV～800kV, such as, its electric pressure can be but not limited to: 5kV, 9kV, 20kV, 35kV, 55kV, 120kV, 220kV, 330kV, 500kV, 760kV etc..
nullA kind of DC boosting concentrates inversion photovoltaic generating system，Including control unit 12、Multiple DC boosting generator units 22 and a centralized inverter 10，Each DC boosting generator unit all includes a DC boosting cabinet 6、DC-DC device 8 and multiple direct current input branch road 3，The positive-negative input end of each direct current input branch road 3 is respectively connecting to the positive-negative output end of the photovoltaic module 1 of this branch road，The positive-negative output end parallel connection of multiple direct currents input branch road accesses the input of DC boosting cabinet 6，Described direct current input branch road 3 is no less than two，Multichannel positive pole and negative pole that multiple direct currents input branch circuit parallel connection is confluxed in cabinet by described DC boosting cabinet are connected，And export the input to a DC-DC device 8 with primary Ioops from the outfan of DC boosting cabinet，The DC side of centralized inverter 10 is accessed after each direct current cables 9 parallel connection that outfan with the DC-DC device of each DC boosting generator unit is connected respectively，The AC of described centralized inverter accesses public mesohigh AC network；Each direct current input branch road 3 is provided with detector unit 13 and maximal power tracing unit 14, and each branch voltage and electric current that described control unit 12 detects according to detector unit 13 control the photovoltaic module 1 of each branch road with maximum power output." many " that occur in the present invention all refer to " at least two ", described system is made up of control unit and multiple DC boosting generator unit and a centralized inverter, the low-voltage DC in multiple direct currents input branch road 3 in DC boosting generator unit forms multiple mesohigh unidirectional currents through DC boosting cabinet 6 boosting, the plurality of high pressure direct current connects a DC-DC device 8, after DC-DC device concentrates voltage stabilizing, then access public mesohigh AC network after being reverse into alternating current by centralized inverter 10；Described detector unit 13 includes measuring the current detecting unit 15 of described photovoltaic component DC electricity size of current, the voltage detection unit 17 detecting described photovoltaic component DC piezoelectric voltage size and the AD conversion unit 16 for size of current data and voltage swing data are converted into digital signal being connected with described current detecting unit and voltage detection unit；Described control unit 12 determines size of current and the voltage swing of described photovoltaic component DC electricity according to digital signal；Described maximal power tracing unit 14 includes booster circuit 21, the booster circuit of this direct current input branch road is controlled by described control unit according to size of current and the voltage swing of the described photovoltaic component DC electricity determined, until the output voltage of this booster circuit reaches the voltage corresponding to peak power output of the photovoltaic module of this direct current input branch road；Described detector unit also includes display unit 18, to the input block 19 of described control unit input control command with for the alarm unit 20 of alert when described photovoltaic component DC electricity is beyond preset range and/or during other component malfunctions, described display unit is for showing the size of current data of detection, voltage swing data and/or the duty of assembly；
In each DC boosting generator unit, each direct current input branch road 3 includes photovoltaic group string and the direct current conflux case 2 in parallel with photovoltaic group string, the input of the outfan parallel connection access DC boosting cabinet 6 of described direct current conflux case 2 that the photovoltaic module 1 no less than two is serially connected.
In each DC boosting generator unit, the plurality of direct current conflux case 2 is arranged in order, the outfan of described direct current conflux case is divided into cathode output end and cathode output end, the cathode output end of first direct current conflux case being connected with DC boosting cabinet input in DC boosting cabinet and the cathode output end of last direct current conflux case being connected with DC boosting cabinet input, being connected with the outfan of primary Ioops with DC boosting cabinet, the both positive and negative polarity of the outfan of remaining each adjacent direct current conflux case is connected with each other.
In each DC boosting generator unit, described DC boosting cabinet 6 includes multiple low-voltage direct chopper 4 and copper bar 5, and the low-voltage DC in multiple direct current conflux cases 2 boosts through DC boosting cabinet 6, be delivered to DC-DC device 8 through copper bar 5 after low-voltage direct chopper 4 current limliting；Described DC boosting system also includes the dc circuit breaker 7 that input is connected, outfan is connected with DC-DC device with copper bar.Described DC-DC device 8 is connected with the DC side of centralized inverter 10 by direct current cables 9.
nullIn specific implementation process，In each DC boosting generator unit，m、N is no less than 2，M photovoltaic module is connected into a photovoltaic group string，N photovoltaic group string parallel connection accesses n direct current conflux case，Direct current conflux case is in parallel after being confluxed by low-voltage DC accesses input in DC boosting cabinet，Each input connects with each corresponding low-voltage direct chopper the most respectively，The plurality of direct current conflux case is arranged in order，The outfan of described direct current conflux case is divided into cathode output end and cathode output end，The low-voltage direct chopper that multiple that be arranged in order and described n direct current conflux case is corresponding is included in described DC boosting cabinet，The outfan of each low-voltage direct chopper is divided into cathode output end and cathode output end，The cathode output end of the cathode output end of first low-voltage direct chopper and second low-voltage direct chopper is connected by copper bar，The cathode output end of the cathode output end of second low-voltage direct chopper and the 3rd is connected by copper bar，The rest may be inferred，Until the cathode output end of last low-voltage direct chopper accesses the input of dc circuit breaker，And the cathode output end of first low-voltage direct chopper also accesses the input of dc circuit breaker，I.e. access a dc circuit breaker with primary Ioops，The input of the outfan of its dc circuit breaker and a DC-DC device is connected，Then the outfan of DC-DC device and the DC side of a centralized inverter are connected，The AC of its centralized inverter is directly accessed electrical network.
nullWhen the output voltage UPV of the solar cell tandem of each direct current input branch road is more than or equal to the nominal input voltage Uin of header box rear class connect inverter，I.e. UPV >=Uin，Switching tube in MPPT unit is in cut-off state，The output voltage UPV of battery tandem is directly by inductance and diode，Output is to the outfan of MPPT unit，Now MPPT unit is without maximal power tracing function，Output P=the Uin*Ipv of the most each branch road photovoltaic module，Wherein，Ipv is the output electric current of each branch road photovoltaic module，This is because now the outfan of header box is connected on the input of inverter，When the output voltage of header box is more than the input voltage of inverter，The output voltage of header box is pulled to the input voltage Uin of inverter by the input direct-current busbar voltage that inverter sets；When the output voltage UPV of the solar cell tandem of header box each direct current input branch road is less than the nominal input voltage Uin of the connect inverter of header box rear class, i.e. UPV ＜ Uin, switching tube in MPPT unit carries out pulse width modulation (PWM) with high-frequency mode, the output voltage of corresponding light photovoltaic assembly is carried out boosting rectifier control, until the output voltage of MPPT unit reaches the voltage corresponding to peak power output of corresponding light photovoltaic assembly, now the output of corresponding light photovoltaic assembly reaches maximum.
Described direct current conflux case is installed near the photovoltaic module of its correspondence, so that the length of the low-voltage direct cable between the corresponding photovoltaic module of each direct current conflux case is the shortest, thus effectively reduces DC losses, improves efficiency.
In order to improve the stability of described DC boosting system further, described utility model have employed low-voltage direct chopper and dc circuit breaker current limliting, and system and device can accurately be protected from fault harms such as overload, short circuits.
Described DC boosting concentrates inversion photovoltaic generating system also to include that former avris is connected with centralized inverter, the booster transformer 11 that secondary side is connected with public mesohigh AC network；When the alternating voltage that the AC of centralized inverter exports is less than the electric pressure of public mesohigh AC network to be accessed, the alternating voltage of the AC output of centering centralized inverter carries out boosting process, so that it meets the electric pressure of public mesohigh AC network to be accessed, certainly, if the alternating voltage of the AC output of centralized inverter meets the electric pressure of public mesohigh AC network to be accessed, then need not arrange booster transformer, i.e. the AC of centralized inverter is directly accessed mesohigh AC network.In the present invention, described booster transformer uses the high-frequency step-up transformer of the high class of insulation, and actual insulation grade and operating frequency range can be chosen according to the running voltage of one group of photovoltaic module of its correspondence voluntarily by those skilled in the art.
Operation principle of the present utility model is: native system uses a plurality of DC boosting generator unit that can run simultaneously side by side, can low-voltage DC variable flow and variable pressure to solar photovoltaic assembly simultaneously, meet the requirement that demand in the public mesohigh AC network unit interval is big.In each DC boosting generator unit, solar photovoltaic assembly converts the solar into low-voltage direct electric energy, the requirement of mesohigh alternating current is needed owing to described low-voltage direct electric energy does not meets public electric wire net to be accessed, therefore it is provided with multiple corresponding direct current conflux case to be confluxed by the low-voltage DC of multiple inputs, low-voltage DC after confluxing is after a DC boosting cabinet boosting, export with primary Ioops, again by a DC-DC device voltage stabilizing, public electric wire net is accessed after mesohigh unidirectional current after voltage stabilizing mesohigh alternating current required for centralized inverter inversion is electrical network again；And described control unit can control the photovoltaic module of each branch road with maximum power output according to each branch voltage of detector unit detection and electric current.Described utility model compares the grid-connected power station of conventional photovoltaic, and commutator transformer directly boosts unsteady flow again, reduces the inverter of each generator unit and rises buckling, decreasing on-site equipment investment and civil engineering；DC boosting cabinet to inverter uses high voltage direct current conveying, can reduce line loss, reduces cable cost；Direct current cables is compared ac cable and is had more preferable carrier wave stability, it is possible to decrease the installation requirement of electrical secondary system and input；Simultaneously, in each DC boosting generator unit, the outfan of multiple direct current conflux cases had accessed the input of DC boosting cabinet before this with parallel way, then in DC boosting cabinet, again the outfan circuit of each direct current conflux case is connected between input and the outfan of DC boosting cabinet, when in actual mechanical process, when each DC boosting generator unit breaks down, described connected mode can detect each parallel line one by one, see specifically which bar circuit there is a problem, solve once circuit goes wrong, need the problem that each parts of whole system must carry out investigating one by one, reduce the scope of repair, improve efficiency, the most preferably serve and prevent short circuit and the effect of protection；Described input block can facilitate user control information to be input in joining unit, it is achieved DC boosting is concentrated the control of inversion photovoltaic generating system, and input block can be button, can control command be input in detection module by button.In order to enable DC boosting to concentrate the duty of inversion photovoltaic generating system each assembly to be found in time when occurring abnormal, in the application, alarm unit can also be set in detector unit, when certain in joining unit or some component malfunctions, or the electric current being input in joining unit occurs abnormal, such as overvoltage or under-voltage, fault message and abnormal information can be shown by display unit or send warning by alarm sound by alarm unit, and input block and alarm unit can be turned on and off being controlled by control unit in addition.
The technical scheme provided this utility model embodiment above is described in detail, principle and the embodiment of this utility model embodiment are set forth by specific case used herein, and the explanation of above example is only applicable to the principle helping to understand this utility model embodiment；Simultaneously for one of ordinary skill in the art, according to this utility model embodiment, all will change in detailed description of the invention and range of application, in sum, this specification content should not be construed as restriction of the present utility model.
Claims (10)
- null1. a DC boosting concentrates inversion photovoltaic generating system，It is characterized in that: include control unit (12)、Multiple DC boosting generator units (22) and a centralized inverter (10)，Each DC boosting generator unit (22) all includes a DC boosting cabinet (6)、DC-DC device (8) and multiple direct current input branch road (3)，The positive-negative input end of each direct current input branch road (3) is respectively connecting to the positive-negative output end of the photovoltaic module (1) of this branch road，The positive-negative output end parallel connection of multiple direct currents input branch road (3) accesses the input of DC boosting cabinet (6)，Multichannel positive pole and negative pole that input branch road (3) parallel connection of multiple direct currents is confluxed in cabinet by described DC boosting cabinet (6) are connected，And export the input to a DC-DC device (8) with primary Ioops from the outfan of DC boosting cabinet (6)，The DC side of centralized inverter (10) is accessed after each direct current cables (9) parallel connection that outfan with the DC-DC device (8) of each DC boosting generator unit (22) is connected respectively，The AC of described centralized inverter (10) accesses public mesohigh AC network，Each direct current input branch road (3) is provided with detector unit (13) and maximal power tracing unit (14)，Each branch voltage and electric current that described control unit (12) detects according to detector unit (13) control the photovoltaic module of each branch road with maximum power output.
- The most according to claim 1, DC boosting concentrates inversion photovoltaic generating system, it is characterised in that: described detector unit (13) includes measuring the current detecting unit (15) of described photovoltaic component DC electricity size of current, the voltage detection unit (17) detecting described photovoltaic component DC piezoelectric voltage size and the AD conversion unit (16) for size of current data and voltage swing data are converted into digital signal being connected with described current detecting unit and voltage detection unit；Described control unit (12) determines size of current and the voltage swing of described photovoltaic component DC electricity according to digital signal.
- DC boosting the most according to claim 2 concentrates inversion photovoltaic generating system, it is characterized in that: described maximal power tracing unit (14) includes booster circuit (21), the booster circuit (21) of this direct current input branch road (3) is controlled by described control unit (12) according to size of current and the voltage swing of the described photovoltaic component DC electricity determined, until the output voltage of this booster circuit reaches the voltage corresponding to peak power output of the photovoltaic module of this direct current input branch road.
- The most according to claim 2, DC boosting concentrates inversion photovoltaic generating system, it is characterized in that: described detector unit (13) also includes display unit (18), to the input block (19) of described control unit input control command with for the alarm unit (20) of alert when described photovoltaic component DC electricity is beyond preset range and/or during other component malfunctions, described display unit is for showing the size of current data of detection, voltage swing data and/or the duty of assembly.
- The most according to claim 1, DC boosting concentrates inversion photovoltaic generating system, it is characterized in that, in each DC boosting generator unit (22), each direct current input branch road (3) includes photovoltaic group string and the direct current conflux case (2) in parallel with photovoltaic group string, the input of outfan parallel connection access DC boosting cabinet (6) of described direct current conflux case (2) that the photovoltaic module (1) no less than two is serially connected.
- The most according to claim 5, DC boosting concentrates inversion photovoltaic generating system, it is characterized in that: in each DC boosting generator unit, the plurality of direct current conflux case (2) is arranged in order, the outfan of described direct current conflux case is divided into cathode output end and cathode output end, the cathode output end of first direct current conflux case (2) being connected with DC boosting cabinet input in DC boosting cabinet and the cathode output end of last direct current conflux case being connected with DC boosting cabinet input, it is connected with the outfan of primary Ioops with DC boosting cabinet, the both positive and negative polarity of the outfan of remaining each adjacent direct current conflux case is connected with each other.
- 7. concentrate inversion photovoltaic generating system according to DC boosting described in claim 1 or 6, it is characterized in that: in each DC boosting generator unit, described DC boosting cabinet (6) includes multiple low-voltage direct chopper (4) and copper bar (5), and the low-voltage DC in multiple direct current conflux cases (2) is delivered to a DC-DC device (8) through copper bar (5) after DC boosting cabinet (6) boosting, low-voltage direct chopper (4) current limliting.
- The most according to claim 7, DC boosting concentrates inversion photovoltaic generating system, it is characterized in that: in each DC boosting generator unit, described DC boosting cabinet also includes the dc circuit breaker (7) that input is connected, outfan is connected with DC-DC device (8) with copper bar (5).
- The most according to claim 8, DC boosting concentrates inversion photovoltaic generating system, it is characterised in that: described DC-DC device (8) is connected with the DC side of centralized inverter (10) by direct current cables (9).
- The most according to claim 5, DC boosting concentrates inversion photovoltaic generating system, it is characterized in that: described DC boosting concentrates inversion photovoltaic generating system also to include that former avris is connected with centralized inverter (10), the booster transformer (11) that secondary side is connected with public mesohigh AC network, described direct current conflux case (2) is installed near the photovoltaic module (1) of its correspondence, so that the length of the low-voltage direct cable between the corresponding photovoltaic module of each direct current conflux case is the shortest.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610131575.6A CN105680476A (en) | 2016-03-09 | 2016-03-09 | Direct-current boost concentrated inversion photovoltaic power generation system |
| CN201620176042.5U CN205544327U (en) | 2016-03-09 | 2016-03-09 | Direct current steps up and concentrates contravariant photovoltaic power generation system |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610131575.6A CN105680476A (en) | 2016-03-09 | 2016-03-09 | Direct-current boost concentrated inversion photovoltaic power generation system |
| CN201620176042.5U CN205544327U (en) | 2016-03-09 | 2016-03-09 | Direct current steps up and concentrates contravariant photovoltaic power generation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205544327U true CN205544327U (en) | 2016-08-31 |
Family
ID=69590528
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610131575.6A Pending CN105680476A (en) | 2016-03-09 | 2016-03-09 | Direct-current boost concentrated inversion photovoltaic power generation system |
| CN201620176042.5U Expired - Fee Related CN205544327U (en) | 2016-03-09 | 2016-03-09 | Direct current steps up and concentrates contravariant photovoltaic power generation system |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610131575.6A Pending CN105680476A (en) | 2016-03-09 | 2016-03-09 | Direct-current boost concentrated inversion photovoltaic power generation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN105680476A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105680476A (en) * | 2016-03-09 | 2016-06-15 | 湖南馨雅林工程技术有限公司 | Direct-current boost concentrated inversion photovoltaic power generation system |
| CN113489051A (en) * | 2021-06-09 | 2021-10-08 | 北京京投天信电力电子有限公司 | Flexible voltage soft take-off and landing control system and method for photovoltaic power station |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205901296U (en) * | 2016-07-12 | 2017-01-18 | 北京实力源科技开发有限责任公司 | High -voltage direct current power supply system |
| CN106569065B (en) * | 2016-11-03 | 2023-09-05 | 国网浙江省电力公司舟山供电公司 | Direct current cable thermal cycle voltage test device |
| CN107612008A (en) * | 2017-09-13 | 2018-01-19 | 河南省三禾电气有限公司 | Intelligence becomes distribution method and system |
| CN107994614A (en) * | 2017-12-22 | 2018-05-04 | 上能电气股份有限公司 | A kind of collecting and distributing type photovoltaic inverting system cooperative control method |
| CN109066778A (en) * | 2018-08-13 | 2018-12-21 | 珠海格力电器股份有限公司 | Converter circuit, converter and photovoltaic system |
| CN112367039A (en) * | 2020-11-09 | 2021-02-12 | 华北电力科学研究院有限责任公司 | Intelligent header box |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102820808B (en) * | 2011-06-10 | 2015-07-01 | 特变电工新疆新能源股份有限公司 | Photovoltaic array combiner box |
| CN102931684A (en) * | 2012-11-09 | 2013-02-13 | 东华大学 | Photovoltaic alternate current and direct current intelligent distribution box |
| CN103368200A (en) * | 2013-06-25 | 2013-10-23 | 南车株洲电力机车研究所有限公司 | Single-ended VSC-HVDC photovoltaic power generation system |
| DE102013217963A1 (en) * | 2013-09-09 | 2015-03-26 | Siemens Aktiengesellschaft | Multi-generator system |
| CN105703389B (en) * | 2014-08-25 | 2019-06-25 | 特变电工新疆新能源股份有限公司 | A kind of grid-connected photovoltaic system based on the access of mesohigh direct current |
| CN105680476A (en) * | 2016-03-09 | 2016-06-15 | 湖南馨雅林工程技术有限公司 | Direct-current boost concentrated inversion photovoltaic power generation system |
-
2016
- 2016-03-09 CN CN201610131575.6A patent/CN105680476A/en active Pending
- 2016-03-09 CN CN201620176042.5U patent/CN205544327U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105680476A (en) * | 2016-03-09 | 2016-06-15 | 湖南馨雅林工程技术有限公司 | Direct-current boost concentrated inversion photovoltaic power generation system |
| CN113489051A (en) * | 2021-06-09 | 2021-10-08 | 北京京投天信电力电子有限公司 | Flexible voltage soft take-off and landing control system and method for photovoltaic power station |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105680476A (en) | 2016-06-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205544327U (en) | Direct current steps up and concentrates contravariant photovoltaic power generation system | |
| CN204103504U (en) | A kind of grid-connected photovoltaic system based on the access of mesohigh direct current | |
| CN104113280B (en) | Tandem photovoltaic square formation | |
| CN205646843U (en) | A grid -connected inverter and renewable energy power generation system for renewable energy electricity generation | |
| CN203313097U (en) | Large power photovoltaic power generation system | |
| CN106972479A (en) | The design method and high-low pressure dc circuit breaker of a kind of direct-current grid | |
| CN103091604B (en) | A kind of island detection method of grid-connected photovoltaic system and pick-up unit | |
| CN204179684U (en) | Wind turbine generator fault traversing device | |
| CN205509468U (en) | Collection flow box protection device | |
| CN105656051A (en) | Transient-energy dissipation device | |
| CN103267889A (en) | Novel intelligent photovoltaic confluence device | |
| CN104796025A (en) | Sub-module topological structure of modular multilevel converter | |
| CN205901296U (en) | High -voltage direct current power supply system | |
| CN205304269U (en) | Direct current pressure increasing system of grid -connected PV electricity generation | |
| CN105652116B (en) | Back-to-back test circuit based on DC/DC converter | |
| CN202535091U (en) | Photovoltaic micro grid-connected inverter | |
| WO2021208141A1 (en) | Power supply system | |
| CN105186550A (en) | Improved modularized multi-level converter submodule topology | |
| CN203103330U (en) | Intelligent photovoltaic lightning protection anti-reverse junction box | |
| Li et al. | A review on topology, operating and control methods of HVDC transmission system for offshore wind farms | |
| CN217720738U (en) | Permanent fault ride-through system for offshore flexible direct-current submarine cable | |
| CN204103855U (en) | Tandem photovoltaic square formation | |
| CN203278227U (en) | Highly efficient anti-reverse combiner box circuit | |
| CN109671344A (en) | A kind of topological structure for direct current transmission and distribution constructional dynamic simulation experimental system | |
| CN115663782A (en) | Power supply system of power plant |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160831 Termination date: 20200309 |