CN218919996U - Roof distributed photovoltaic inverter - Google Patents
Roof distributed photovoltaic inverter Download PDFInfo
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- CN218919996U CN218919996U CN202223500943.XU CN202223500943U CN218919996U CN 218919996 U CN218919996 U CN 218919996U CN 202223500943 U CN202223500943 U CN 202223500943U CN 218919996 U CN218919996 U CN 218919996U
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- direct current
- current contactor
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/10—Photovoltaic [PV]
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- Supply And Distribution Of Alternating Current (AREA)
Abstract
The utility model relates to the technical field of inverters, in particular to a roof distributed photovoltaic inverter, which comprises: the photovoltaic module, the inversion main loop, the disconnecting link, the power grid, the direct current contactor KM1, the direct current contactor KM2, the auxiliary circuit and the switch power panel are connected in sequence; the output end of the photovoltaic module is respectively connected with one end of a direct current contactor KM2 and the input end of an inversion main loop, the other end of the direct current contactor KM2 is respectively connected with one end of an auxiliary circuit and one end of a direct current contactor KM1, the other end of the direct current contactor KM1 is connected with one end of a switch power panel, the other end of the switch power panel is respectively connected with the output end of the inversion main loop and one end of a disconnecting link, and the other end of the disconnecting link is connected with a power grid.
Description
Technical Field
The utility model relates to the technical field of inverters, in particular to a roof distributed photovoltaic inverter.
Background
Roof distributed photovoltaic power station data is mainly collected through an on-site inverter, and is transmitted to a cloud platform in an Internet of things mode through a communication device in the inverter device. At present, the main current inverter in the market still adopts a component side direct current power supply to independently supply power, and the inverter independently supplied by the direct current power supply has the following problems: when the string input direct current disappears and the power station direct current component stops generating at night, the working power supply of the inverter disappears, the control circuit, the communication circuit and the detection circuit stop working, the communication between the inverter and the cloud platform is interrupted, the power station is in an off-line state, the power station and the inverter state cannot be monitored, monitoring staff cannot find the fault condition of the power station equipment in time, maintenance staff cannot process in time, and the safety and stability of the operation of the power station are not facilitated. Based on this, we have devised a roof-top distributed photovoltaic inverter for the above-mentioned problems.
Disclosure of Invention
The utility model aims to provide a roof distributed photovoltaic inverter which is used for solving the technical problems.
The embodiment of the utility model is realized by the following technical scheme:
a rooftop distributed photovoltaic inverter, comprising: the photovoltaic module, the inversion main loop, the disconnecting link, the power grid, the direct current contactor KM1, the direct current contactor KM2, the auxiliary circuit and the switch power panel are connected in sequence;
the output end of the photovoltaic module is respectively connected with one end of a direct current contactor KM2 and the input end of an inversion main loop, the other end of the direct current contactor KM2 is respectively connected with one end of an auxiliary circuit and one end of a direct current contactor KM1, the other end of the direct current contactor KM1 is connected with one end of a switch power panel, the other end of the switch power panel is respectively connected with the output end of the inversion main loop and one end of a disconnecting link, and the other end of the disconnecting link is connected with a power grid.
Optionally, the positive output end of the photovoltaic module is connected with the positive input end of the inversion main loop, the input end of the direct current contactor KM2 and the normally open point 1 of the direct current contactor KM2 respectively, the output end of the direct current contactor KM2 is connected with the normally closed point of the direct current contactor KM1, and the negative output end of the photovoltaic module is connected with the negative input end of the inversion main loop, the normally closed point of the direct current contactor KM1 and the normally open point 2 of the direct current contactor KM2 respectively.
Optionally, the normally open point 3 of the dc contactor KM2 is connected with one end of the auxiliary circuit and the normally open point 3 of the dc contactor KM1, the normally open point 4 of the dc contactor KM2 is connected with one end of the auxiliary circuit and the normally open point 4 of the dc contactor KM1, the normally open point 1 of the dc contactor KM1 is connected with one end of the switching power board and an output end of the dc contactor KM1, and the normally open point 2 of the dc contactor KM1 is connected with one end of the switching power board and an input end of the dc contactor KM 1.
The technical scheme of the embodiment of the utility model has at least the following advantages and beneficial effects:
the auxiliary circuit is transformed into direct current and alternating current dual power supply, so that the reliability of power supply is ensured, any power supply disappears, the work of an inverter is not influenced, the communication is kept normal, the power station is online constantly, and the background monitoring is facilitated.
Drawings
Fig. 1 is a schematic circuit diagram of a roof-top distributed photovoltaic inverter according to the present utility model.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
As shown in fig. 1, the present utility model provides one of the embodiments: a rooftop distributed photovoltaic inverter, comprising: the photovoltaic module, the inversion main loop, the disconnecting link, the power grid, the direct current contactor KM1, the direct current contactor KM2, the auxiliary circuit and the switch power panel are connected in sequence;
the output end of the photovoltaic module is respectively connected with one end of a direct current contactor KM2 and the input end of an inversion main loop, the other end of the direct current contactor KM2 is respectively connected with one end of an auxiliary circuit and one end of a direct current contactor KM1, the other end of the direct current contactor KM1 is connected with one end of a switch power panel, the other end of the switch power panel is respectively connected with the output end of the inversion main loop and one end of a disconnecting link, and the other end of the disconnecting link is connected with a power grid.
More specifically, the positive output end of the photovoltaic module is respectively connected with the positive input end of the inversion main loop, the input end of the direct current contactor KM2 and the normally open point 1 of the direct current contactor KM2, the output end of the direct current contactor KM2 is connected with the normally closed point of the direct current contactor KM1, and the negative output end of the photovoltaic module is respectively connected with the negative input end of the inversion main loop, the normally closed point of the direct current contactor KM1 and the normally open point 2 of the direct current contactor KM 2.
More specifically, the normally open point 3 of the direct current contactor KM2 is connected with one end of the auxiliary circuit and the normally open point 3 of the direct current contactor KM1 respectively, the normally open point 4 of the direct current contactor KM2 is connected with one end of the auxiliary circuit and the normally open point 4 of the direct current contactor KM1 respectively, the normally open point 1 of the direct current contactor KM1 is connected with one end of the switching power board and the output end of the direct current contactor KM1 respectively, and the normally open point 2 of the direct current contactor KM1 is connected with one end of the switching power board and the input end of the direct current contactor KM1 respectively.
In the implementation process, one path of alternating current is led to the switch power board at the DK terminal of the disconnecting link of the grid-connected switch power box, the switch power board inputs the alternating current with the voltage range of 180-270VAC and outputs 220VDC, and the positive and negative loops are connected to the auxiliary circuit direct current input positive and negative loop terminals through the main loop of the direct current contactor KM 1. The coil loop of the direct current contactor KM1 is connected with a direct current output terminal of a switch power panel, the main loop of the direct current contactor KM2 is connected with an auxiliary circuit and a direct current input positive and negative loop of the inverter, and the coil loop of the direct current contactor KM2 is connected with the normally closed auxiliary contact of the direct current contactor KM1 in series and is connected with the direct current loop between the direct current contactor KM2 and the inverter.
Through the loop design, the AC/DC double-loop power supply of the power supply for the inverter to work can be realized. The power grid side and the direct current side of the assembly simultaneously supply power, the switching power panel rectifies and outputs, the coil of the direct current contactor KM1 is electrified, the main contact of the direct current contactor KM1 is closed, the auxiliary normally-closed contact KM1 is opened, the coil loop of the direct current contactor KM2 is deenergized, the main contact loop of the direct current contactor KM2 is opened, and the inverter auxiliary circuit is powered by the main loop of the direct current contactor KM 1. When the direct current of the photovoltaic module is interrupted, and the power is supplied from the main loop of the direct current contactor KM1 according to the principle. When the power grid side is powered off and the photovoltaic module is electrified in a direct current mode, the coil of the direct current contactor KM1 is powered off, the loop of the main contact KM1 of the direct current contactor is disconnected, the auxiliary normally-closed contact KM1 of the direct current contactor is closed, the loop of the coil of the direct current contactor KM2 is connected, the loop of the main contact KM2 of the direct current contactor is connected with the auxiliary loop of the power supply inverter, and the power supply principle is switched to the power grid side contactor for supplying power simultaneously with the power grid side and the direct current side of the module if the power grid side power is recovered.
The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (3)
1. A roof-top distributed photovoltaic inverter, comprising: the photovoltaic module, the inversion main loop, the disconnecting link, the power grid, the direct current contactor KM1, the direct current contactor KM2, the auxiliary circuit and the switch power panel are connected in sequence;
the output end of the photovoltaic module is respectively connected with one end of a direct current contactor KM2 and the input end of an inversion main loop, the other end of the direct current contactor KM2 is respectively connected with one end of an auxiliary circuit and one end of a direct current contactor KM1, the other end of the direct current contactor KM1 is connected with one end of a switch power panel, the other end of the switch power panel is respectively connected with the output end of the inversion main loop and one end of a disconnecting link, and the other end of the disconnecting link is connected with a power grid.
2. The roof-top distributed photovoltaic inverter according to claim 1, wherein the positive output end of the photovoltaic module is connected with the positive input end of the inverter main circuit, the input end of the direct current contactor KM2 and the normally open point 1 of the direct current contactor KM2, the output end of the direct current contactor KM2 is connected with the normally closed point of the direct current contactor KM1, and the negative output end of the photovoltaic module is connected with the negative input end of the inverter main circuit, the normally closed point of the direct current contactor KM1 and the normally open point 2 of the direct current contactor KM 2.
3. The roof-top distributed photovoltaic inverter according to claim 2, wherein the normally open point 3 of the dc contactor KM2 is connected with one end of the auxiliary circuit and the normally open point 3 of the dc contactor KM1, the normally open point 4 of the dc contactor KM2 is connected with one end of the auxiliary circuit and the normally open point 4 of the dc contactor KM1, the normally open point 1 of the dc contactor KM1 is connected with one end of the switching power board and an output end of the dc contactor KM1, and the normally open point 2 of the dc contactor KM1 is connected with one end of the switching power board and an input end of the dc contactor KM 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223500943.XU CN218919996U (en) | 2022-12-27 | 2022-12-27 | Roof distributed photovoltaic inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223500943.XU CN218919996U (en) | 2022-12-27 | 2022-12-27 | Roof distributed photovoltaic inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218919996U true CN218919996U (en) | 2023-04-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223500943.XU Active CN218919996U (en) | 2022-12-27 | 2022-12-27 | Roof distributed photovoltaic inverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218919996U (en) |
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2022
- 2022-12-27 CN CN202223500943.XU patent/CN218919996U/en active Active
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