CN208272649U - A kind of grid-connected dedicated box of distributed photovoltaic - Google Patents
A kind of grid-connected dedicated box of distributed photovoltaic Download PDFInfo
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- CN208272649U CN208272649U CN201820909278.4U CN201820909278U CN208272649U CN 208272649 U CN208272649 U CN 208272649U CN 201820909278 U CN201820909278 U CN 201820909278U CN 208272649 U CN208272649 U CN 208272649U
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- 230000001681 protective effect Effects 0.000 claims abstract description 10
- 238000004891 communication Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 238000010248 power generation Methods 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
-
- 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
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- Supply And Distribution Of Alternating Current (AREA)
Abstract
The utility model provides a kind of grid-connected dedicated box of distributed photovoltaic, is box typed structure, and front is opened the door, and box house is equipped with electrical component mounting plate.The electrical component installed on electrical component mounting plate has: disconnecting link QS, current sensor CT, voltage sensor PT, RTU, GPRS-DTU, contactor K1, circuit breaker Q F1, earth leakage protective device QF2, arrester SPD and 24V DC power supply.The top of the box of grid-connected dedicated box is equipped with rain cover, one jiao of rain cover upper end is equipped with antenna shield, there is the antenna being connected with GPRS-DTU inside the antenna shield, the antenna bottom is adsorbed in rain cover upper end, is connected by conducting wire with the GPRS-DTU of box house.For distributed photovoltaic power generation, user is grid-connected, cancel large-scale ammeter and cutting-in control and display device, using RTU-GPRS technology, carry out remote voltage, current acquisition and cutting-in control, the not no electrical component of large volume in cabinet, cabinet overall volume is small, long-range cutting-in control, multiple functional, be easily installed.
Description
Technical field
The utility model relates to technical field of photovoltaic power generation, in particular to a kind of grid-connected dedicated box of distributed photovoltaic.
Background technique
Since country carries out the subsidy of photovoltaic power generation degree electricity, photovoltaic power generation is grown rapidly, especially in a kind of area in China and
It is more rapid that higher regional development is subsidized in southern photovoltaic place.
Existing grid-connected case is designed with the equipment such as the biggish ammeter of volume, cutting-in control and display device, inconvenient
In installation and use.
For the ease of power supply enterprise to distributed photovoltaic power generation safety management, it is also convenient for installation distributed photovoltaic power generation user
It is grid-connected, on the basis of meeting State Grid Corporation of China's grid-connected requirement, need to design and produce a kind of grid-connected dedicated box of distributed remote,
Compact-sized compared with similar product, multiple functional, safety and stability, the characteristics of being easily installed, and cost is greatly lowered.
Summary of the invention
In order to solve the problems, such as described in background technique, the utility model provides a kind of grid-connected dedicated box of distributed photovoltaic, uses
In distributed photovoltaic power generation, user is grid-connected, cancels large-scale ammeter and cutting-in control and display device, using RTU-GPRS technology, into
Row remote voltage, current acquisition and long-range cutting-in control, the not no electrical component of large volume in cabinet, cabinet overall volume is small,
Long-range cutting-in control, it is multiple functional, be easily installed.
In order to achieve the above object, the utility model is implemented with the following technical solutions:
A kind of grid-connected dedicated box of distributed photovoltaic, the grid-connected dedicated box are box typed structure, and front is opened the door, case
Internal portion is equipped with electrical component mounting plate.
The electrical component installed on the electrical component mounting plate includes: disconnecting link QS1, current sensor CT, voltage biography
Sensor PT, RTU, GPRS-DTU, contactor K1, circuit breaker Q F1, earth leakage protective device QF2, arrester SPD and 24V DC power supply.
The top of the box of the grid-connected dedicated box is equipped with rain cover, and one jiao of rain cover upper end is equipped with antenna protection
It covers, has the antenna being connected with GPRS-DTU inside the antenna shield, the antenna bottom is adsorbed on rain cover
End, is connected by conducting wire with the GPRS-DTU of box house.
Be electrically connected between electrical component on the electrical component mounting plate, connection type include major loop connection and
Control loop connection: the described major loop connection from top source side be sequentially connected disconnecting link QS, contactor K1 main contacts K1-O,
Circuit breaker Q F1, earth leakage protective device QF2, the lower end earth leakage protective device QF2 are lower electric power side, and arrester SPD is connected under disconnecting link QS
Between end and ground terminal, voltage sensor PT primary side is connected between disconnecting link QS and the main contacts K1-O of contactor K1, electric current
Sensor CT primary side is socketed in outside the cable between disconnecting link QS and the main contacts K1-O of contactor K1.
The control loop connection are as follows: the secondary side of current sensor CT and voltage sensor PT are connected to RTU's
AI input interface, RTU DO output interface output is connected on the coil of contactor K1, RTU also pass through RS485 interface with
GPRS-DTU communication connection.
The 24V DC power supply provides DC power supply for RTU and GPRS-DTU.
Compared with prior art, the utility model has the beneficial effects that
1, the utility model is grid-connected for distributed photovoltaic power generation user, cancels large-scale ammeter and cutting-in control and display dress
It sets, using RTU-GPRS technology, carries out remote voltage, current acquisition and long-range cutting-in control, the not no electricity of large volume in cabinet
Gas element, cabinet overall volume is small, long-range cutting-in control, multiple functional, be easily installed.
2, the utility model cabinet design rain cover, can rain-proof, be suitable for outdoor installation.
3, the utility model devises antenna shield, carries out rain-proof, preventing collision protection to GPRS antenna.
Detailed description of the invention
Fig. 1 is the body structure figure of the utility model；
Fig. 2 is the electric elements inside layout drawing of the utility model；
Fig. 3 is the electrical component connection figure of the utility model.
Wherein: 1- cabinet 2- rain cover 3- antenna shield 4- front door 5- ventilation hole 6- electrical component mounting plate 7-
GPRS antenna.
Specific embodiment
Specific embodiment provided by the utility model is described in detail below in conjunction with attached drawing.
As shown in Figs. 1-2, the grid-connected dedicated box of a kind of distributed photovoltaic, the grid-connected dedicated box are box-type knot
Structure, front open the door 4, and electrical component mounting plate 6 is equipped with inside cabinet 1.
As shown in Fig. 2, the electrical component installed on the electrical component mounting plate 6 includes: disconnecting link QS1, current sense
Device CT, voltage sensor PT, RTU, GPRS-DTU, contactor K1, circuit breaker Q F1, earth leakage protective device QF2, arrester SPD and
24V DC power supply.
As shown in Figs. 1-2, rain cover 2,1 upper end one of rain cover are equipped at the top of the cabinet 1 of the grid-connected dedicated box
Angle is equipped with antenna shield 3, there is the antenna 7 being connected with GPRS-DTU, the antenna inside the antenna shield 3
7 bottoms are adsorbed in 2 upper end of rain cover, are connected by conducting wire with the GPRS-DTU of box house.
As shown in figure 3, being electrically connected between electrical component on the electrical component mounting plate, connection type includes master
Circuit connection is connected with control loop: the major loop connection are as follows: source side is sequentially connected disconnecting link QS, contactor K1 from top
Main contacts K1-O, circuit breaker Q F1, earth leakage protective device QF2, the lower end earth leakage protective device QF2 be lower electric power side, arrester SPD
It is connected between the lower end disconnecting link QS and ground terminal, voltage sensor PT primary side is connected to the main contacts of disconnecting link QS Yu contactor K1
Between K1-O, current sensor CT primary side is socketed in outside the cable between disconnecting link QS and the main contacts K1-O of contactor K1.
As shown in figure 3, the control loop connects are as follows: the secondary side of current sensor CT and voltage sensor PT connect
It is connected to the AI input interface of RTU, the DO output interface output of RTU is connected on the coil of contactor K1, and RTU also passes through RS485
Interface and GPRS-DTU communication connection.
The 24V DC power supply provides DC power supply for RTU and GPRS-DTU.
The JY-RTU6120 of the preferably poly- English electronics of the RTU, RS232/RS485 double-serial port；Two server connection；Broken string
Reconnection；12 road AD analog acquisitions；No. 9 relays control output；Power-down state saves；7-30V power supply.
The JY-DTU-W of the preferably poly- English of the DTU is provided including 2G network (GSM network), 2.5G network (GPRS net
Network), 2.75G network (EDGE network), 3G network (WCDMA network, EVDO network, TD-SCDMA network), the product of whole network
It supports.
The voltage sensor and current sensor is 4-20mA type voltage transmitter and current transducer.
Long-range and network process are as follows: by the voltage value U of RTU acquisition photovoltaic electric source, when voltage value meet it is grid-connected i.e.: 85%UN
≤ U≤110%UN(UNFor the power grid voltage rating of distributed generation resource grid entry point) when, it is controlled by remote server by DTU and RTU
The actuation of contactor K1 processed, make photovoltaic electric source with and net side power supply be connected, carry out grid-connected, be then separating brake when other voltage values
Movement, specific as follows:
Above embodiments are implemented under premised on technical solutions of the utility model, give detailed embodiment
With specific operating process, but the protection scope of the utility model is not limited to the above embodiments.Side used in above-described embodiment
Method is conventional method unless otherwise instructed.
Claims (4)
1. a kind of grid-connected dedicated box of distributed photovoltaic, the grid-connected dedicated box is box typed structure, and front is opened the door, cabinet
Inside is equipped with electrical component mounting plate；
It is characterized in that, the electrical component installed on the electrical component mounting plate include: disconnecting link QS1, current sensor CT,
Voltage sensor PT, RTU, GPRS-DTU, contactor K1, circuit breaker Q F1, earth leakage protective device QF2, arrester SPD and 24V direct current
Power supply；
The top of the box of the grid-connected dedicated box is equipped with rain cover, and one jiao of rain cover upper end is equipped with antenna shield,
There is the antenna being connected with GPRS-DTU inside the antenna shield, the antenna bottom is adsorbed in rain cover upper end,
It is connected by conducting wire with the GPRS-DTU of box house.
2. the grid-connected dedicated box of a kind of distributed photovoltaic according to claim 1, which is characterized in that the electrical component peace
It is electrically connected between electrical component in loading board, connection type includes that major loop connection is connected with control loop: the master returns
Road connection are as follows: source side is sequentially connected disconnecting link QS, the main contacts K1-O of contactor K1, circuit breaker Q F1 and earth leakage protective from top
Device QF2, the lower end earth leakage protective device QF2 are lower electric power side, and arrester SPD is connected between the lower end disconnecting link QS and ground terminal, electricity
Pressure sensor PT primary side is connected between disconnecting link QS and the main contacts K1-O of contactor K1, the socket of current sensor CT primary side
Outside cable between disconnecting link QS and the main contacts K1-O of contactor K1.
3. the grid-connected dedicated box of a kind of distributed photovoltaic according to claim 2, which is characterized in that the control loop connects
Be connected in: the secondary side of current sensor CT and voltage sensor PT are connected to the AI input interface of RTU, and the DO output of RTU connects
Mouth output is connected on the coil of contactor K1, and RTU also passes through RS485 interface and GPRS-DTU communication connection.
4. the grid-connected dedicated box of a kind of distributed photovoltaic according to claim 1, which is characterized in that the 24V direct current
Source provides DC power supply for RTU and GPRS-DTU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820909278.4U CN208272649U (en) | 2018-06-12 | 2018-06-12 | A kind of grid-connected dedicated box of distributed photovoltaic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820909278.4U CN208272649U (en) | 2018-06-12 | 2018-06-12 | A kind of grid-connected dedicated box of distributed photovoltaic |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208272649U true CN208272649U (en) | 2018-12-21 |
Family
ID=64688822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820909278.4U Active CN208272649U (en) | 2018-06-12 | 2018-06-12 | A kind of grid-connected dedicated box of distributed photovoltaic |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208272649U (en) |
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2018
- 2018-06-12 CN CN201820909278.4U patent/CN208272649U/en active Active
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