CN110034725A - A kind of digital photovoltaic exchange header box - Google Patents

A kind of digital photovoltaic exchange header box Download PDF

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Publication number
CN110034725A
CN110034725A CN201910441429.7A CN201910441429A CN110034725A CN 110034725 A CN110034725 A CN 110034725A CN 201910441429 A CN201910441429 A CN 201910441429A CN 110034725 A CN110034725 A CN 110034725A
Authority
CN
China
Prior art keywords
input
breaker
phase
terminal
digital
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.)
Pending
Application number
CN201910441429.7A
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Chinese (zh)
Inventor
胡剑锋
周军安
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NINGBO HENGSHENG ELECTRIC CO Ltd
Original Assignee
NINGBO HENGSHENG ELECTRIC CO Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NINGBO HENGSHENG ELECTRIC CO Ltd filed Critical NINGBO HENGSHENG ELECTRIC CO Ltd
Priority to CN201910441429.7A priority Critical patent/CN110034725A/en
Publication of CN110034725A publication Critical patent/CN110034725A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02SGENERATION OF ELECTRIC POWER BY CONVERSION OF INFRA-RED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/30Electrical components
    • H02S40/34Electrical components comprising specially adapted electrical connection means to be structurally associated with the PV module, e.g. junction boxes
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy

Abstract

The invention discloses a kind of digital photovoltaics to exchange header box, including input breaker, Surge Protector, output breaker, three-phase digital multifunctional measurement and control ammeter and 8 way switch amount acquisition devices;The input breaker and the Surge Protector pass through electrical connection; the output end of the Surge Protector and the output breaker pass through electrical connection; the three-phase digital multifunctional measurement and control ammeter and 8 way switch amount acquisition device series connection, are parallel with the three-phase digital multifunctional measurement and control ammeter and the 8 way switch amount acquisition device between the input breaker and the output breaker.A kind of digital photovoltaic of the present invention exchanges header box, to realize that the value to voltage input and electric current input on three-phase is monitored in real time, increases effective electrical isolation, realizes to the electrical isolation of input and output, protect the life security of staff.

Description

A kind of digital photovoltaic exchange header box
Technical field
The present invention relates to photovoltaics to exchange header box technical field, exchanges header box more particularly to a kind of digital photovoltaic.
Background technique
Header box is to guarantee that photovoltaic module orderly connects and the termination of combining functions in photovoltaic generating system.The dress Setting can ensure that photovoltaic system easily is switched off circuit in maintenance, inspection, reduce the model having a power failure when photovoltaic system breaks down It encloses.Header box refers to that user can connect certain amount, the identical photovoltaic cell of specification, forms photovoltaic string one by one Then several photovoltaic tandem parallel connections are accessed photovoltaic combiner box again by column, after converging in photovoltaic combiner box, by controller, DC power distribution cabinet, photovoltaic DC-to-AC converter, AC power distribution cabinet/AC distribution panel match to constitute complete photovoltaic generating system, realization and city Electricity is grid-connected.
In currently available technology, the effect of photovoltaic exchange header box is the output electric current of multiple inverters of converging, and is protected simultaneously Inverter is protected from cut-off point being exported as inverter, improving the safety of system to from the harm for exchanging grid-connected side/load Property, protect the safety of installation maintenance personnel.Since the value to voltage input and electric current input on three-phase is not supervised in real time Control, without effective electrical isolation, such defect can be posed a serious threat to staff.
Summary of the invention
(1) technical problems to be solved
The problem to be solved by the invention is to provide a kind of digital photovoltaics to exchange header box, to realize to the electricity on three-phase The value of pressure input and electric current input is monitored in real time, increases effective electrical isolation, realization to input and output it is electrical every From protecting the life security of staff.
(2) technical solution
In order to achieve the above objectives, the technical proposal adopted by the invention to solve the above technical problems is that providing a kind of digital Photovoltaic exchanges header box, including input breaker, Surge Protector, output breaker, three-phase digital multifunctional measurement and control ammeter With 8 way switch amount acquisition devices;The input breaker and the Surge Protector pass through electrical connection, the Surge Protector Output end and the output breaker pass through electrical connection, the three-phase digital multifunctional measurement and control ammeter and the 8 way switch amount Acquisition device series connection, is parallel with the three-phase digital multifunctional measurement and control between the input breaker and the output breaker Ammeter and the 8 way switch amount acquisition device.
Further, the input breaker includes the first input breaker, the second input breaker, third input breaker With the 4th input breaker, the first input breaker, the second input breaker, third input breaker and institute It states the 4th input breaker output end converges by triple line, the input breaker input termination exchange input is described defeated Enter breaker output and terminate the Surge Protector, the first fusing is equipped between the input breaker and the Surge Protector Device, three-phase output end are connected to the output breaker for protecting circuit.
Further, the three-phase digital multifunctional measurement and control ammeter includes the first three-phase current input terminal, the second three-phase electricity Flow input terminal and three-phase voltage input terminal;The first three-phase current input terminal is connected with the first electricity for measuring three-phase current Current transformer, the second three-phase current input terminal are connected with the second current transformer for measuring three-phase current;Described three Phase voltage input is terminated in triple line formation three-phase voltage input measurement line, and the three-phase voltage input measurement line is equipped with the Two fuses.
Further, the 8 way switch amount acquisition device includes control switch, the first communication terminal, the second communication terminal, electricity Source positive terminal and power cathode terminal, the control switch control respectively the input breaker, the output breaker and The Surge Protector is turned on or off, and the three-phase digital multifunctional measurement and control ammeter is equipped with for connecting described first The RS-485 communication terminal of communication terminal and second communication terminal, the three-phase digital multifunctional measurement and control ammeter are equipped with For connecting the accessory power supply positive terminal of the power supply positive terminal, the three-phase digital multifunctional measurement and control ammeter is equipped with For connecting the accessory power supply negative terminal of the power cathode terminal, the power supply positive terminal and the power cathode terminal It is connected again by voltage transformer with the three-phase voltage input measurement line, the right side of voltage transformer is equipped with third fuse.
Further, the three-phase digital multifunctional measurement and control ammeter and the 8 way switch amount acquisition device pass through RS-485 Bus carries out data exchange.
Further, the exchange input goes out using four into one.
Further, photovoltaic exchange header box is installed between inverter ac outlet side and grid entry point.
(3) beneficial effect
Compared with prior art, technical solution of the present invention has the advantages that the present invention utilizes the more function of three-phase digital Energy observing and controlling ammeter directly accesses signal from current transformer and voltage transformer, carries out to the essential information of three-phase line real-time Measurement and record, then 8 way switch amount acquisition devices are accessed, 8 way switch amount acquisition devices and three-phase digital multifunctional measurement and control electricity Table carries out data exchange by RS-485 bus, reflects status input signal in real time, 8 way switch amount acquisition devices using photoelectricity every From technology, realizes to the electrical isolation of input and output, protect the life security of staff.
Detailed description of the invention
Fig. 1 is the electrical schematic diagram that a kind of digital photovoltaic of the invention exchanges header box;
The corresponding component names of each appended drawing reference are in figure: QF1 is the first input breaker, QF2 is the second input Breaker, QF3 are third input breaker, QF4 is the 4th input breaker, SPD is Surge Protector, QF is output open circuit Device, PMC-33M are three-phase digital multifunctional measurement and control ammeter, I1 is the first three-phase current input terminal, I3 is the second three-phase current Input terminal, D are RS-485 communication terminal, L is auxiliary power supply positive terminal, N is auxiliary power cathode terminal, V is three-phase voltage Input terminal, CT1 are the first current transformer, CT2 is the second current transformer, L1 is three-phase voltage input measurement line, ARTU-K8 For 8 way switch amount acquisition devices, A be the first communication terminal, B is the second communication terminal, 2 is power supply positive terminal, 1 is that power supply is negative Extreme son, FU1 are first fuse, FU2 is second fuse, FU3 is third fuse.
Specific embodiment
The present embodiment:
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below Example is not intended to limit the scope of the invention for illustrating the present invention.
As shown in Figure 1, a kind of digital photovoltaic exchanges header box, including input breaker, Surge Protector SPD, output Circuit breaker Q F, three-phase digital multifunctional measurement and control ammeter PMC-33M and 8 way switch amount acquisition device ARTU-K8;Input breaker With Surge Protector SPD by electrical connection, the output end and output circuit breaker Q F of Surge Protector SPD passes through electrical connection, three-phase Digital multifunctional observing and controlling ammeter PMC-33M and 8 way switch amount acquisition device ARTU-K8 series connection, input breaker and output are disconnected Three-phase digital multifunctional measurement and control ammeter PMC-33M and 8 way switch amount acquisition device ARTU-K8 are parallel between the device QF of road.
Input breaker include first input circuit breaker Q F1, second input circuit breaker Q F2, third input circuit breaker Q F3 and 4th input circuit breaker Q F4, the first input circuit breaker Q F1, the second input circuit breaker Q F2, third input circuit breaker Q F3 and the 4th Input circuit breaker Q F4 is converged output end by triple line, input breaker input termination exchange input, input breaker output Surge Protector SPD is terminated, inputs and is equipped with first fuse FU1 between breaker and Surge Protector SPD, three-phase output end connects There is the output circuit breaker Q F for protecting circuit.
Three-phase digital multifunctional measurement and control ammeter PMC-33M includes the first three-phase current input terminal I1, the second three-phase current Input terminal I3 and three-phase voltage input terminal V;First three-phase current input terminal I1 is connected with the first electricity for measuring three-phase current Current transformer CT1, the second three-phase current input terminal I3 are connected with the second Current Transmit 2 for measuring three-phase current;Institute Three-phase voltage input terminal V is stated to be connected in triple line on formation three-phase voltage input measurement line L1, three-phase voltage input measurement line L1 Equipped with second fuse FU2;8 way switch amount acquisition device ARTU-K8 include control switch, the first communication terminal A, the second communication Terminal B, power supply positive terminal 2 and power cathode terminal 1, control switch control respectively input breaker, output circuit breaker Q F and Surge Protector SPD's is turned on or off, and three-phase digital multifunctional measurement and control ammeter PMC-33M is equipped with logical for connecting first Believe that the RS-485 communication terminal D of terminal A and the second communication terminal B, three-phase digital multifunctional measurement and control ammeter PMC-33M are equipped with For connecting the accessory power supply positive terminal L of power supply positive terminal 2, set on three-phase digital multifunctional measurement and control ammeter PMC-33M There is the accessory power supply negative terminal N for connecting power cathode terminal 1, power supply positive terminal 2 and power cathode terminal 1 pass through again Voltage transformer is connected with three-phase voltage input measurement line L1, and the right side of voltage transformer is equipped with third fuse FU3.
Three-phase digital multifunctional measurement and control ammeter PMC-33M and 8 way switch amount acquisition device ARTU-K8 is total by RS-485 Line carries out data exchange, and exchange input goes out using four into one, and photovoltaic exchange header box is installed on inverter ac outlet side and simultaneously Between site.
Refering to fig. 1, this photovoltaic exchange header box is four into one to go out, and four exchanges are inputted and are summarised in triple line, defeated Entering termination, there are four for protecting the first of circuit to input circuit breaker Q F1, the second input circuit breaker Q F2, third input breaker The input circuit breaker Q F4 of QF3 and the 4th, then Surge Protector SPD is connected to by triple line, it is lower than equipment for transient suppression over-voltage It is resistant to impulse overvoltage, surge energy is discharged, prevents lightning surge and operation in low-voltage distribution system and data-signal circuit Process voltage is invaded along power supply line and signal wire, protects electrical equipment against the protective device of damage, and three-phase output end, which is equipped with, to be used In the output circuit breaker Q F of protection circuit;
The first three-phase current input terminal I1 in three-phase digital multifunctional measurement and control ammeter PMC-33M includes I11 and I12 two A terminal, two terminals of I11 and I12 are connect respectively at 1 both ends of the first Current Transmit;Second three-phase current input terminal I3 includes Two terminals of I11 and I12, two terminals of I31 and I32 are connect respectively at 2 both ends of the second Current Transmit, mutual by the first electric current Sensor CT1 and the second Current Transmit 2 measure the electric current of each phase of three-phase respectively, three-phase voltage input terminal V include V1, V2 and Tri- connecting terminals of V3, three-phase voltage input measurement line L1 include tri- lines of L11, L12 and L13, three-phase voltage input measurement line In an end Jie triple line of L1, the other end of three-phase voltage input measurement line L1 is connected to tri- terminals of V1, V2 and V3 respectively On son, for measuring the voltage of each phase of three-phase;Accessory power supply anode inside three-phase digital multifunctional measurement and control ammeter PMC-33M Power supply positive terminal 2 on 8 way switch amount acquisition device ARTU-K8 of terminal L connection, three-phase digital multifunctional measurement and control ammeter The power cathode terminal 1 on 8 way switch amount acquisition device ARTU-K8 of accessory power supply negative terminal N connection inside PMC-33M, RS-485 communication terminal D includes two connecting terminals of D+ and D-, RS-485 communication terminal D+ and 8 way switch amount acquisition devices The second communication terminal B connection on ARTU-K8, on RS-485 communication terminal D- and 8 way switch amount acquisition device ARTU-K8 One communication terminal A connection carries out data exchange by RS485 bus, reflects the state of input signal, the first communication terminal in real time It is isolated and has protection circuit using high speed photo coupling with the second communication terminal, the voltage disturbance of common mode or differential mode can be prevented;
Control switch on 8 way switch amount acquisition device ARTU-K8 includes 4,5,6,7,8 and 9 this six connecting terminals, is connect First input circuit breaker Q F1's of the control of line terminals 4 is turned on or off, the conducting of second input of the control of connecting terminal 5 circuit breaker Q F2 Or disconnect, connecting terminal 6 controls being turned on or off for third input circuit breaker Q F3, the 4th input breaker of the control of connecting terminal 7 QF4's is turned on or off, and the control output circuit breaker Q F's of connecting terminal 8 is turned on or off, and connecting terminal 9 controls Surge Protector SPD's is turned on or off;8 way switch amount acquisition device ARTU-K8 can acquire 8 tunnels simultaneously source contact or the switch without source contact Signal is measured, and uses photoelectric isolation technology, realizes the electrical isolation to input and output.
Compared with prior art, technical solution of the present invention has the advantages that the present invention utilizes the more function of three-phase digital Energy observing and controlling ammeter directly accesses signal from current transformer and voltage transformer, carries out to the essential information of three-phase line real-time Measurement and record, then 8 way switch amount acquisition devices are accessed, 8 way switch amount acquisition devices and three-phase digital multifunctional measurement and control electricity Table carries out data exchange by RS-485 bus, reflects status input signal in real time, 8 way switch amount acquisition devices using photoelectricity every From technology, realizes to the electrical isolation of input and output, protect the life security of staff.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, without departing from the technical principles of the invention, several improvements and modifications can also be made, these improvements and modifications Also it should be regarded as protection scope of the present invention.

Claims (7)

1. a kind of digital photovoltaic exchanges header box, it is characterised in that: including input breaker, Surge Protector (SPD), output Breaker (QF), three-phase digital multifunctional measurement and control ammeter (PMC-33M) and 8 way switch amount acquisition devices (ARTU-K8);It is described Breaker and the Surge Protector (SPD) are inputted by electrical connection, the output end of the Surge Protector (SPD) and described defeated Breaker (QF) by electrical connection, adopt by the three-phase digital multifunctional measurement and control ammeter (PMC-33M) and the 8 way switch amount out Acquisition means (ARTU-K8) series connection, is parallel with the three-phase digital between the input breaker and the output breaker (QF) Formula multifunctional measurement and control ammeter (PMC-33M) and the 8 way switch amount acquisition device (ARTU-K8).
2. digital photovoltaic according to claim 1 exchanges header box, it is characterised in that: the input breaker includes the One input breaker (QF1), the second input breaker (QF2), third input breaker (QF3) and the 4th input breaker (QF4), first input breaker (QF1), second input breaker (QF2), third input breaker (QF3) Output end is converged by triple line with the 4th input breaker (QF4), the input breaker input termination exchange is defeated Enter, the input breaker output terminates the Surge Protector (SPD), the input breaker and the Surge Protector (SPD) it is equipped with first fuse (FU1) between, three-phase output end is connected to the output breaker (QF) for protecting circuit.
3. digital photovoltaic according to claim 1 exchanges header box, it is characterised in that: the three-phase digital is multi-functional Observing and controlling ammeter (PMC-33M) includes the first three-phase current input terminal (I1), the second three-phase current input terminal (I3) and three-phase voltage Input terminal (V);The first three-phase current input terminal (I1) is connected with the first current transformer for measuring three-phase current (CT1), the second three-phase current input terminal (I3) is connected with the second current transformer (CT2) for measuring three-phase current; The three-phase voltage input terminal (V) is connected to formation three-phase voltage input measurement line (L1) in triple line, the three-phase voltage input It measures line (L1) and is equipped with second fuse (FU2).
4. digital photovoltaic according to claim 3 exchanges header box, it is characterised in that: the 8 way switch amount acquisition dress Setting (ARTU-K8) includes control switch, the first communication terminal (A), the second communication terminal (B), power supply positive terminal (2) and power supply Negative terminal (1), the control switch control the input breaker, the output breaker (QF) and the surge respectively and protect Shield device (SPD) is turned on or off, and the three-phase digital multifunctional measurement and control ammeter (PMC-33M) is equipped with described for connecting The RS-485 communication terminal (D) of first communication terminal (A) and second communication terminal (B), the three-phase digital are multi-functional Observing and controlling ammeter (PMC-33M) is equipped with the accessory power supply positive terminal (L) for connecting the power supply positive terminal (2), described Three-phase digital multifunctional measurement and control ammeter (PMC-33M) is equipped with the accessory power supply for connecting the power cathode terminal (1) Negative terminal (N), the power supply positive terminal (2) and the power cathode terminal (1) pass through voltage transformer and described three again The right side of phase voltage input measurement line (L1) connection, voltage transformer is equipped with third fuse (FU3).
5. digital photovoltaic according to claim 3 exchanges header box, it is characterised in that: the three-phase digital is multi-functional Observing and controlling ammeter (PMC-33M) and the 8 way switch amount acquisition device (ARTU-K8) pass through RS-485 bus progress data exchange.
6. digital photovoltaic according to claim 3 exchanges header box, it is characterised in that: the exchange input use four into One goes out.
7. digital photovoltaic according to claim 3 exchanges header box, it is characterised in that: photovoltaic exchange header box is installed on Between inverter ac outlet side and grid entry point.
CN201910441429.7A 2019-05-24 2019-05-24 A kind of digital photovoltaic exchange header box Pending CN110034725A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910441429.7A CN110034725A (en) 2019-05-24 2019-05-24 A kind of digital photovoltaic exchange header box

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910441429.7A CN110034725A (en) 2019-05-24 2019-05-24 A kind of digital photovoltaic exchange header box

Publications (1)

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CN110034725A true CN110034725A (en) 2019-07-19

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CN201910441429.7A Pending CN110034725A (en) 2019-05-24 2019-05-24 A kind of digital photovoltaic exchange header box

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201758256U (en) * 2010-04-15 2011-03-09 深圳东方泰和科技有限公司 AC distribution box
CN207070009U (en) * 2017-07-31 2018-03-02 苏州长风自动化科技有限公司 Header box with arcing early warning and defencive function
CN207603558U (en) * 2017-12-06 2018-07-10 苏州长风自动化科技有限公司 Exchange header box with smoke alarm unit
CN207603557U (en) * 2017-12-06 2018-07-10 苏州长风自动化科技有限公司 Intelligent AC header box

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201758256U (en) * 2010-04-15 2011-03-09 深圳东方泰和科技有限公司 AC distribution box
CN207070009U (en) * 2017-07-31 2018-03-02 苏州长风自动化科技有限公司 Header box with arcing early warning and defencive function
CN207603558U (en) * 2017-12-06 2018-07-10 苏州长风自动化科技有限公司 Exchange header box with smoke alarm unit
CN207603557U (en) * 2017-12-06 2018-07-10 苏州长风自动化科技有限公司 Intelligent AC header box

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Application publication date: 20190719