CN201682403U

CN201682403U - Modularized structure device of inverter unit in photovoltaic inverter

Info

Publication number: CN201682403U
Application number: CN2010201608647U
Authority: CN
Inventors: 焦道海; 许迎锋; 靳伟伟
Original assignee: Changzhou Giantion Optoelectronics Industry Development Co Ltd
Current assignee: Changzhou Giantion Optoelectronics Industry Development Co Ltd
Priority date: 2010-04-16
Filing date: 2010-04-16
Publication date: 2010-12-22
Anticipated expiration: 2020-04-16

Abstract

The utility model discloses a modularized structure device of an inverter unit in a photovoltaic inverter, which comprises three groups of modularized inverter units, and each group comprises a fixed baseplate, a radiator, a power device, a power device driver module, an input bus bar, a laminated bus bar and an output bus bar, wherein the radiator is fixed on the fixed baseplate and a blower is arranged at the outlet of the radiator; both the power device and the power device driver module controlling the work of the power device are arranged on the radiator; the input end of the input bus bar is connected with a photovoltaic array; the input bus bar is connected with the laminated bus bar; the output end of the laminated bus bar is connected with the power device; and the output end of the power device is connected with the output bus bar. The utility model has the advantages of good radiating performance, easy flow line production and convenient assembly.

Description

A kind of inversion unit modularization structure device of photovoltaic inverter

Technical field

The utility model relates to the inverter field, particularly a kind of photovoltaic DC-to-AC converter that is used for photovoltaic generating system.

Background technology

Along with the development of economic society, the old energy is fewer and feweri, and environment damage is progressively deepened, human beginning more concern new forms of energy.Solar energy is a kind of inexhaustible energy, environmentally-friendly sanitary, and be not subjected to regional restriction, and therefore become a kind of future source of energy that people pay attention to most, particularly utilize solar energy to generate electricity.But, photovoltaic array output all be direct current generally, in application, often need to be converted into to alternating current and can to utilize by photovoltaic DC-to-AC converter.3 phase full-bridge inverting unit of high-power photovoltaic DC-to-AC converter often adopt integrated design in being applied at present, promptly all power devices, electric capacity, radiator, bus are arranged whole lumps and are become an integral module, can cause unit volume big like this, cause the cabinet space utilance low, it is inhomogeneous to dispel the heat, equipment work environmental requirement strictness because module whole is heavier, is unfavorable for streamline production and workman's installation exercise simultaneously.

Summary of the invention

The purpose of this utility model is that the unit volume that exists at the existing photovoltaic DC-to-AC converter described in the background technology is big, the low problem of the inhomogeneous cabinet space utilance of heat radiation, and a kind of inversion unit modularization structure device of photovoltaic inverter is provided.

The realization the technical solution of the utility model is as follows:

A kind of inversion unit modularization structure device of photovoltaic inverter, it comprises the inversion unit of three series of modular, every group of inversion unit includes fixed base plate, radiator, power device, the power device driver module, inlet highway row, laminating bus bar and output bus row, described radiator is fixed on the fixed base plate, the outlet of radiator is provided with blower fan, the power device drive module setting of power device and the work of power controlling device is on radiator, inlet highway row's input connects photovoltaic array, inlet highway row be connected with laminating bus bar, the output of laminating bus bar connects power device, and the output of power device connects output bus row.

The input positive electrode bus row of stacked setting is drawn together in described inlet highway package, the intermediate insulating layer between input positive electrode bus row and the input negative pole bus row is arranged and be arranged to input negative pole bus, laminating bus bar comprises top layer bus row, intermediate bus bar row and bottom bus row, top layer bus row is connected with input negative pole bus row, bottom bus row is connected with input positive electrode bus row, between top layer bus row and the intermediate bus bar row, be provided with insulation board between intermediate bus bar row and the bottom bus row, described power device comprises positive device and negative power device, the bottom bus row be connected with the positive device, the top layer bus row be connected with the negative power device, between intermediate bus bar row and the bottom bus row, be provided with the filtering equalizer circuit between intermediate bus bar row and the top layer bus row.

Described filtering equalizer circuit comprises that several direct current chains support electric capacity and grading resistor, and the direct current chain supports electric capacity and grading resistor is connected in parallel.

Described output bus row is fixed on a side of fixed base plate by insulated column.

Described fixed base plate both sides are respectively arranged with fixed side, and radiator is fixed by fixed side.

Described positive device and negative power device are the IGBT thyristor.

The beneficial effects of the utility model are because inversion unit modularization structure device of photovoltaic inverter of the present utility model is divided into the inversion unit of three series of modular, every group of inversion unit is a single-phase semi-bridge inversion device, form a three-phase full-bridge inverter, control by the power device driver module, to be transformed into 3 cross streams from the direct current of photovoltaic array input, export from the output of each inversion unit respectively, by this design, make the overall structure modularization of photovoltaic DC-to-AC converter, make its heat dispersion obtain tangible improvement, and because three groups of inversion units are separate, therefore, when producing and assemble, can produce respectively and assemble, owing to adopt modular construction, the space availability ratio of photovoltaic DC-to-AC converter is improved, and overall performance obtains better.Because input bus row of the present utility model, laminating bus bar are arranged with stacked structure, between each layer bus row, insulation board is set, guarantees the insulation between each utmost point, reduce the inductance coefficent of bus simultaneously, reduce impedance, reduce pressure drop, reduce the infringement of due to voltage spikes, prolong the physical life of electronic component components and parts, reduce system noise and electromagnetic interference, the reliability of increase system makes the compact conformation of bus simultaneously, and is succinct and attractive in appearance more.

Description of drawings

Fig. 1 is the explosive view of a phase inversion unit of the present utility model;

Fig. 2 is circuit theory diagrams of the present utility model;

Among the figure, 1 is fixed base plate, and 2 is radiator, and 3 is power device, 4 is the power device driver module, and 5 are input positive electrode bus row, and 6 are input negative pole bus row, and 7 are top layer bus row, 8 are intermediate bus bar row, and 9 are bottom bus row, and 10 are output bus row, 11 is blower fan, and 12 is intermediate insulating layer, and 13 is insulation board, 14 is the positive device, and 15 is the negative power device, and 16 are direct current chain support electric capacity, 17 is grading resistor, and 18 is fixed side, and 19 is insulated column.

Embodiment

With reference to Fig. 1 and a kind of inversion unit modularization structure device of photovoltaic inverter shown in Figure 2, it comprises the inversion unit of three series of modular, every group of inversion unit includes fixed base plate 1, radiator 2, power device 3, power device driver module 4, inlet highway row 5 and output bus row 10, described radiator 2 is fixed on the fixed base plate 1, the outlet of radiator 2 is provided with blower fan 11, power device 3 is arranged on the radiator 2, power device driver module 4 is fixed on the radiator 2 by fixed head, power device driver module 4 is connected with power device 3, the conducting of power controlling device 3 and disconnection, inlet highway row 5 input connects photovoltaic array, inlet highway row 5 output connects laminating bus bar, the output of laminating bus bar connects power device 3, and the output of power device 3 connects output bus row 10.The input positive electrode bus row 5 of stacked setting is drawn together in described inlet highway package, input negative pole bus row 6 and be arranged at input positive electrode bus row 5 and input negative pole bus and arrange intermediate insulating layer 12 between 6, laminating bus bar comprises top layer bus row 7, intermediate bus bar row 8 and bottom bus row 9, top layer bus row 7 is connected with input negative pole bus row 6, bottom bus row 9 is connected with input positive electrode bus row 5, between top layer bus row 7 and the intermediate bus bar row 8, be provided with insulation board 13 between intermediate bus bar row 8 and the bottom bus row 9, described power device comprises positive device 14 and negative power device 15, positive device 14 and negative power device 15 all are the IGBT thyristors, power device 3 is the core parts of inverter, conducting and disconnection by power device driver module 4 power controlling devices 3, change the polarity of output voltage, make direct current change alternating current into, by UVW end output sinusoidal modulation wave (SPWM), realize the function of inverter.Bottom bus row 9 is connected with positive device 14, and top layer bus row 7 is connected with negative power device 15, intermediate bus bar arrange 8 and the bottom bus arrange 9 between, intermediate bus bar arrange 8 and the top layer bus be provided with the filtering equalizer circuit between arranging 7.Described filtering equalizer circuit comprises that several direct current chains support electric capacity 16 and grading resistor 17, the direct current chain supports electric capacity 16 and is connected in parallel with grading resistor 17, support capacitor filtering from the direct current of photovoltaic array input through direct current, equalizing capacitance is all pressed, make on positive device 14 and the negative power device 15 added voltage swing identical, make the alternating current both positive and negative polarity voltage swing of output identical.Described output bus row 10 is fixed on a side of fixed base plate 1 by insulated column 19.Described fixed base plate 1 both sides are respectively arranged with fixed side 18, and radiator 2 is fixed by fixed side 18.

Compare with the inverter of existing integral type, modular inverter individual module volume obviously dwindles, be convenient to streamline production and installation exercise, modules is respectively arranged with radiator 2, the heat radiation that can guarantee like this inverter is even, make the work that power device 3 can be stable, and increase the service life, by this modular design the space availability ratio of rack is improved. The input bus is set to stepped construction, input positive electrode bus row 5, input negative pole bus bar 6 and top layer bus bar 7, intermediate bus bar row 8 and bottom bus bar 9 are laminated structure, heat dispersion is better, its inductance coefficent is reduced, its impedance is reduced, reduce its pressure drop, reduce due to voltage spikes to the infringement of components and parts, prolong the physical life of electronic component, reduce system noise and electromagnetic interference, the reliability of increase system makes the compact conformation of bus simultaneously, and is more succinct and attractive in appearance.

Claims

1. inversion unit modularization structure device of photovoltaic inverter, it is characterized in that: it comprises the inversion unit of three series of modular, every group of inversion unit includes fixed base plate, radiator, power device, the power device driver module, inlet highway row, laminating bus bar and output bus row, described radiator is fixed on the fixed base plate, the outlet of radiator is provided with blower fan, the power device drive module setting of power device and the work of power controlling device is on radiator, inlet highway row's input connects photovoltaic array, inlet highway row be connected with laminating bus bar, the output of laminating bus bar connects power device, and the output of power device connects output bus row.

2. a kind of inversion unit modularization structure device of photovoltaic inverter according to claim 1, it is characterized in that: the input positive electrode bus row of stacked setting is drawn together in described inlet highway package, the intermediate insulating layer between input positive electrode bus row and the input negative pole bus row is arranged and be arranged to input negative pole bus, laminating bus bar comprises top layer bus row, intermediate bus bar row and bottom bus row, top layer bus row is connected with input negative pole bus row, bottom bus row is connected with input positive electrode bus row, between top layer bus row and the intermediate bus bar row, be provided with insulation board between intermediate bus bar row and the bottom bus row, described power device comprises positive device and negative power device, the bottom bus row be connected with the positive device, the top layer bus row be connected with the negative power device, between intermediate bus bar row and the bottom bus row, be provided with the filtering equalizer circuit between intermediate bus bar row and the top layer bus row.

3. a kind of inversion unit modularization structure device of photovoltaic inverter according to claim 2 is characterized in that: described filtering equalizer circuit comprises that several direct current chains support electric capacity and grading resistor, and the direct current chain supports electric capacity and grading resistor is connected in parallel.

4. a kind of inversion unit modularization structure device of photovoltaic inverter according to claim 1 is characterized in that: described output bus row is fixed on a side of fixed base plate by insulated column.

5. a kind of inversion unit modularization structure device of photovoltaic inverter according to claim 1 is characterized in that: described fixed base plate both sides are respectively arranged with fixed side, and radiator is fixed by fixed side.

6. a kind of inversion unit modularization structure device of photovoltaic inverter according to claim 2 is characterized in that: described positive device and negative power device are the IGBT thyristor.