CN211063535U - Novel photovoltaic grid-connected inverter - Google Patents
Novel photovoltaic grid-connected inverter Download PDFInfo
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- CN211063535U CN211063535U CN201921733403.1U CN201921733403U CN211063535U CN 211063535 U CN211063535 U CN 211063535U CN 201921733403 U CN201921733403 U CN 201921733403U CN 211063535 U CN211063535 U CN 211063535U
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- photovoltaic grid
- circuit
- connected inverter
- novel photovoltaic
- radiator
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- 238000001816 cooling Methods 0.000 claims description 21
- 239000000428 dust Substances 0.000 claims description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 230000005855 radiation Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- 239000003990 capacitor Substances 0.000 claims description 4
- 238000004146 energy storage Methods 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 2
- 230000003068 static effect Effects 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 3
- 230000017525 heat dissipation Effects 0.000 description 14
- 230000005611 electricity Effects 0.000 description 10
- 238000010248 power generation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000191 radiation effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
- 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
Abstract
The utility model provides a novel photovoltaic grid-connected inverter, the power distribution box comprises a box body, all install temperature sensor on the upper and lower inner wall of box, radiator and radiator fan are all installed to the both sides of cavity, temperature sensor with radiator fan all is connected through the wire with automatic control, automatic control is connected with conduction circuit, conduction circuit is connected with the main circuit, dispels the heat as required, and the radiating effect is good, in addition, can realize reaching the purpose of energy saving to the utilization of static.
Description
Technical Field
The utility model relates to a photovoltaic power generation equipment field especially relates to a novel photovoltaic grid-connected inverter.
Background
The grid-connected photovoltaic power generation system is connected with a power grid and transmits power to the power grid. The photovoltaic grid-connected power generation system comprises important components such as a solar cell array and a photovoltaic grid-connected inverter, wherein solar energy is converted into direct current through the solar cell array, and then the direct current is converted into alternating current with the same amplitude, the same frequency and the same phase as the voltage of a power grid through the photovoltaic grid-connected inverter.
The core device in the photovoltaic grid-connected power generation system is a photovoltaic grid-connected inverter which has large heat during working, and if the heat dissipation treatment is not carried out in time, the power device of the photovoltaic grid-connected inverter can be damaged, so that the service life of the photovoltaic grid-connected inverter is influenced. At present, two methods of water cooling and air cooling are mainly used as common heat dissipation measures. Specifically, for the photovoltaic grid-connected inverter, an air cooling method may be generally adopted. At present, the rotating speed of most fans used for heat dissipation of the photovoltaic grid-connected inverter is set to be constant, the air volume cannot be adjusted according to the actual temperature, the waste of electric quantity is caused to a certain extent, and the aging of the heat dissipation fans is easy to accelerate. In addition, the radiator layout of the photovoltaic grid-connected inverter in the prior art is not reasonable enough, so that the heat dissipation efficiency is not high.
The traditional antistatic method generally adopts a mode of grounding a metal shell, but in the using process, the metal shell is electrified. When the shell of the photovoltaic grid-connected inverter is charged with static electricity and people touch the shell carelessly, certain damage is caused to power devices inside the photovoltaic grid-connected inverter. In addition, the grounding wire of the common photovoltaic grid-connected inverter is not replaced and repaired for a long time, the grounding wire is easy to age, and the grounding wire cannot play a grounding role after aging.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to the not enough of above-mentioned prior art, provide a novel photovoltaic grid-connected inverter, dispel the heat as required, and realize safe and reliable to the utilization of static.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a novel photovoltaic grid-connected inverter, which comprises a box body, wherein temperature sensors are arranged on the upper inner wall and the lower inner wall of the box body, a radiator and a cooling fan are arranged on both sides of the cavity body, the temperature sensors and the cooling fan are connected with an automatic controller through wires, the automatic controller is connected with a conduction circuit, and the conduction circuit is connected with a main circuit;
the main circuit comprises a direct current breaker which is connected with a three-phase full-bridge voltage type inverter circuit, a reactor, a filter, a three-phase transformer and an alternating current breaker in series.
Furthermore, the conduction circuit comprises diodes, the four diodes form a rectifier bridge and are connected with the energy storage capacitor in parallel, and the input end of the conduction circuit is connected with a ground wire port and a zero line port which are electrostatically grounded in the main circuit; and the output end of the conduction circuit is connected with the automatic controller.
Furthermore, the heat radiation fans on the two sides of the box body are arranged in a staggered mode, and the heat radiators on the two sides of the box body are arranged in a staggered mode; and a dust settling net surface is arranged on the end surface of the inner side of the radiator.
Furthermore, a plurality of regularly arranged heat dissipation through holes are formed in the surface of the heat radiator, and the shape of each heat dissipation through hole is that a square is embedded in the middle of a regular hexagon.
Furthermore, a plurality of raised lines arranged at intervals are installed at the bottom of the inner wall of the box body.
Further, the radiator is made of a copper material.
The utility model has the advantages that: the heat is dissipated according to the requirement, the heat dissipation effect is good, in addition, the utilization of static electricity can be realized, and the purpose of saving energy is achieved;
1) the heat radiation fans on the two sides of the box body are arranged in a staggered mode, so that the upper area and the lower area can be separately monitored and independently radiated, and the heat radiation effect is good;
2) the plurality of convex strips at the bottom of the box body are convenient for the dissipation of heat at the bottom;
3) the automatic controller can adjust the cooling fan through the temperature sensor, so as to realize cooling as required and save energy;
4) the dust fall net surface can play a role in dust fall and reduce dust from entering the photovoltaic grid-connected inverter box body through the heat dissipation through hole on the radiator;
5) the conduction circuit can store and utilize static electricity, and meanwhile, the conduction circuit is low in manufacturing cost, convenient to implement and safe and reliable in the aspect of static electricity prevention.
Drawings
Fig. 1 is a schematic structural diagram of a novel photovoltaic grid-connected inverter according to the present invention;
FIG. 2 is a schematic diagram of a main circuit;
FIG. 3 is a schematic structural view of a dust settling screen;
fig. 4 is a schematic diagram of a conductive circuit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Referring to fig. 1 to 4, a novel photovoltaic grid-connected inverter includes a box 9, temperature sensors 1 are mounted on upper and lower inner walls of the box 9, a heat sink 2 and a heat dissipation fan 4 are mounted on both sides of the cavity, the temperature sensors 1 and the heat dissipation fan 4 are connected to an automatic controller 3 through wires 5, the automatic controller 3 is connected to a conduction circuit 10, and the conduction circuit 10 is connected to a main circuit 7;
wherein, the radiator 2 and the radiator fan 4 on one side are staggered with the radiator 2 and the radiator fan 4 on the other side.
The main circuit 7 comprises a direct current breaker 701, and the direct current breaker 701 is connected with a three-phase full-bridge voltage type inverter circuit 702, a reactor 703, a filter 704, a three-phase transformer 705 and an alternating current breaker 706 in series in sequence.
The main circuit 7 comprises a main circuit board and a power device, the power device is connected with the main circuit board through a copper bar (not shown), an insulating tape is wound outside the copper bar (not shown) for insulation, and the copper bar (not shown) can simultaneously conduct electricity and fix electricity. A thin flat cable (not shown) is connected between the power device and the main circuit board to connect weak electric signals through the thin flat cable.
The conducting circuit 10 comprises diodes 103, four diodes 103 form a rectifier bridge and are connected in parallel with the energy storage capacitor 102, and the input end of the conducting circuit 10 is connected with a ground wire 105 port and a zero wire 104 port of the main circuit 7, which are connected with the static electricity; the output 101 of the conduction circuit 10 is connected to the automatic controller 3.
When static electricity is led into the conducting circuit 10 and rectified, the storage capacitor 102 is used for storing the static electricity energy, and power is supplied to the automatic controller L CD display screen connected with the conducting circuit, so that the utilization of the static electricity is realized, and the purpose of saving energy is achieved.
The heat radiation fans 4 on the two sides of the box body 9 are arranged in a staggered mode, and the radiators 2 on the two sides of the box body 9 are arranged in a staggered mode; and a dust settling net surface 8 is arranged on the end surface of the inner side of the radiator 2.
The two cooling fans 4 are respectively arranged on the left upper surface and the right lower surface of the box body 9, and when the temperature on the box body 9 reaches a preset value, the cooling fan 4 on the left upper surface rotates; when the temperature under the box body 9 reaches a preset value, the heat radiation fan 4 at the lower right rotates;
when the upper surface and the lower surface of the box body 9 reach the set temperature values, the upper cooling fan 4 and the lower cooling fan 4 rotate;
when the temperature drops below the set value, the cooling fan 4 stops rotating, so that the cooling fan 4 rotates as required, the cooling is accelerated, and a good cooling effect is achieved.
The length of the cooling fan 4 is equal to the length of the dustfall screen surface 8 and the length of the radiator 2.
The dust fall net surface 8 can play a role in dust fall, and dust is reduced to enter the box body 9 of the photovoltaic grid-connected inverter through the heat dissipation through hole 201 in the radiator.
The installation heights of the cooling fan 4 and the dust fall net surface 8 are slightly lower than or equal to the highest surface of the whole photovoltaic grid-connected inverter box body structure, and are slightly higher than or equal to the lowest surface. Therefore, the whole photovoltaic grid-connected inverter box body structure can be processed by adopting standard sectional materials, and is not required to be additionally processed into a special shape, so that the processing cost is reduced.
The surface of the radiator 2 is provided with a plurality of regularly arranged radiating through holes 201, and the radiating through holes 201 are in the shape of a regular hexagon with a square embedded in the middle.
The bottom of the inner wall of the box body 9 is provided with a plurality of raised lines 6 arranged at intervals.
Wherein, photovoltaic grid-connected inverter bottom of box is again installed to a plurality of sand grips 6, forms many exhaust passages, is convenient for bottom heat to scatter and disappear.
The radiator 2 is made of a copper material. The copper material has high heat conduction speed and is convenient and quick to dissipate heat.
The automatic controller 3 adjusts the duty ratio of the PWM control signal in real time according to the temperature detected by the temperature sensor 1, controls the duty ratio of the power supply voltage of the cooling fan 4 through the PWM control signal, adjusts the rotating speed of the rotor in real time, and dissipates heat as required in real time, thereby saving energy.
When the temperature sensor 1 detects that the internal temperature of the box 9 of the photovoltaic grid-connected inverter reaches a preset first-gear value, the automatic controller 3 controls the cooling fan 4 to rotate, and the air volume is the first-gear air volume;
when the temperature rise speed in the box body 9 of the photovoltaic grid-connected inverter is higher than the heat dissipation speed and the temperature rises to a preset second-level value, the automatic controller 3 controls the heat dissipation fan 4 to rotate, and the air volume is the second-level air volume;
when the temperature is recovered to be below the first gear value, the heat radiation fan 4 stops rotating, heat radiation is carried out in real time according to needs, and energy can be effectively saved.
The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (6)
1. The utility model provides a novel photovoltaic grid-connected inverter, includes box (9), its characterized in that: temperature sensors (1) are mounted on the upper inner wall and the lower inner wall of the box body (9), radiators (2) and cooling fans (4) are mounted on two sides of the cavity, the temperature sensors (1) and the cooling fans (4) are connected with an automatic controller (3) through wires (5), the automatic controller (3) is connected with a conduction circuit (10), and the conduction circuit (10) is connected with a main circuit (7);
the main circuit (7) comprises a direct current breaker (701), and the direct current breaker (701) is connected with a three-phase full-bridge voltage type inverter circuit (702), a reactor (703), a filter (704), a three-phase transformer (705) and an alternating current breaker (706) in series in sequence.
2. The novel photovoltaic grid-connected inverter according to claim 1, characterized in that: the conducting circuit (10) comprises diodes (103), a rectifier bridge is formed by the four diodes (103) and is connected with the energy storage capacitor (102) in parallel, and the input end of the conducting circuit (10) is connected with the port of a ground wire (105) and the port of a zero wire (104) which are grounded electrostatically in the main circuit (7); the output end (101) of the conduction circuit (10) is connected with the automatic controller (3).
3. The novel photovoltaic grid-connected inverter according to claim 1, characterized in that: the heat radiation fans (4) on the two sides of the box body (9) are arranged in a staggered mode, and the radiators (2) on the two sides of the box body (9) are arranged in a staggered mode; and a dust settling net surface (8) is arranged on the end surface of the inner side of the radiator (2).
4. The novel photovoltaic grid-connected inverter according to claim 1, characterized in that: the surface of the radiator (2) is provided with a plurality of regularly arranged radiating through holes (201), and the radiating through holes (201) are in the shape of a regular hexagon with a square embedded in the middle.
5. The novel photovoltaic grid-connected inverter according to claim 1, characterized in that: the bottom of box (9) inner wall is installed sand grip (6) that a plurality of intervals set up.
6. The novel photovoltaic grid-connected inverter according to claim 1, characterized in that: the radiator (2) is made of copper materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921733403.1U CN211063535U (en) | 2019-10-16 | 2019-10-16 | Novel photovoltaic grid-connected inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921733403.1U CN211063535U (en) | 2019-10-16 | 2019-10-16 | Novel photovoltaic grid-connected inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211063535U true CN211063535U (en) | 2020-07-21 |
Family
ID=71593417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921733403.1U Active CN211063535U (en) | 2019-10-16 | 2019-10-16 | Novel photovoltaic grid-connected inverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211063535U (en) |
-
2019
- 2019-10-16 CN CN201921733403.1U patent/CN211063535U/en active Active
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