CN201956921U

CN201956921U - Case for installing photovoltaic inverter

Info

Publication number: CN201956921U
Application number: CN2011200861021U
Authority: CN
Inventors: 刘祎; 程刚; 齐明
Original assignee: ANHUI JINFENG NEW ENERGY CO LTD
Current assignee: ANHUI JINFENG NEW ENERGY CO LTD
Priority date: 2011-03-28
Filing date: 2011-03-28
Publication date: 2011-08-31
Anticipated expiration: 2021-03-28

Abstract

The utility model relates to the field of photovoltaic grid-connected inverters, in particular to a heat dissipation device for photovoltaic inverters. The cabinet is provided with a main transformer room and a main circuit room which are adjacent to each other, and an isolation plate for electromagnetic isolation and thermal isolation is arranged between the main transformer room and the main circuit room. This case seals the electromagnetic interference generated by the transformer in the main transformer room, and does not allow the electromagnetic interference to pass through the cable to the outside of the box, so as to ensure that the electromagnetic interference generated by the transformer installed in the main transformer room will not affect the Each electrical component in the adjacent main circuit room has an influence, so the utility model ensures the working stability of the photovoltaic inverter.

Description

Be used to install the cabinet of photovoltaic DC-to-AC converter

Technical field

The utility model relates to the photovoltaic combining inverter field, is specifically related to a kind of photovoltaic DC-to-AC converter heat abstractor.

Background technology

Solar energy power generating belongs to the regenerative resource of cleaning, and development and extensive use photovoltaic power generation technology have important function for the shortage of alleviating conventional energy resource and minimizing environmental pollution.Combining inverter is used for the direct current that solar cell sends being changed into alternating current and generating electricity by way of merging two or more grid systems with electrical network, and vital status is being arranged aspect the development and utilization of new forms of energy.Yet have many irrational places in the topology layout of traditional photovoltaic DC-to-AC converter, main performance is as follows: one, the heat dispersion of heater members and cabinet is relatively poor, because thereby the heat dispersion difference causes the temperature in the casing will continue to rise, when the temperature of heater members rises to a certain degree, can make the decreased performance of heater members, and then cause the operating state of photovoltaic DC-to-AC converter can not keep stable; Its two, electromagnetic interference is serious, various electric components load in mixture in a casing, are difficult to solve electromagnetic interference problem, electromagnetic interference can cause each parts of photovoltaic DC-to-AC converter and even the decreased performance of whole system.

The utility model content

The purpose of this utility model provides a kind of cabinet that is used to install photovoltaic DC-to-AC converter, and this cabinet is used to the photovoltaic DC-to-AC converter with the power frequency isolating transformer, and can solve effectively that each electric component loads in mixture caused electromagnetic interference problem in the photovoltaic DC-to-AC converter.

For achieving the above object, the utility model has adopted following technical scheme: a kind of cabinet that is used to install photovoltaic DC-to-AC converter, be provided with main transformer room adjacent one another are and main circuit chamber in this cabinet, be provided with the division board that is used for electromagnetic isolation and heat isolation between described main transformer room and the main circuit chamber.

The utility model can also be able to further realization by following measure simultaneously:

The bottom of described main circuit chamber is provided with reactor, top is provided with IGBT power model and main circuit board adjacent one another are, one side of IGBT power model is provided with heat dissipation wind channel, the downside of heat dissipation wind channel is provided with first cooling fan, and the upside of heat dissipation wind channel is provided with the louvre that connects top, main circuit chamber; The middle part of main circuit chamber is provided with circuit breaker.

The downside of described IGBT power model has been arranged side by side DC filter and alternating current filter, the dc bus row who links to each other with the IGBT power model is from top to bottom linearly to be electrically connected with DC filter, because dc bus row do not intersect with any AC line, thereby reduced the interference between the circuit, improved the quality of power supply.

The heat dissipation wind channel in the described first cooling fan exit is provided with the ventilation slot of opening towards IGBT power model and main circuit board.

The outlet of described ventilation slot towards and the pipeline of heat dissipation wind channel trend between have angle, to guarantee cooling off IGBT power model and main circuit board enough preferably from the wind energy that ventilation slot comes out.

Preferably, described angle is 45 °.

The edge of described ventilation slot is a rectangle perpendicular to the cross sectional shape of gas flow, so that make processing.

Preferably, the length of the square-section of described ventilation slot is 200mm, and width is 15mm.

The pipeline that the length direction of the square-section of described ventilation slot and first cooling fan are positioned at the heat dissipation wind channel at ventilation slot place moves towards perpendicular, thereby feasible wind energy of coming out from ventilation slot enough covers the cooled region of a broad.

The upside of described main transformer room is provided with second cooling fan, and the upside of main circuit chamber is provided with the ventilation hole adjacent with louvre; The casing downside of cabinet is provided with the air inlet that leads to main transformer room and main circuit chamber respectively.

The beneficial effects of the utility model are:

1), be provided with adjacent one another are in this cabinet and independently main transformer room and main circuit chamber, be provided with the division board that plays shielding action between main transformer room and the main circuit chamber, it is indoor that the electromagnetic interference that transformer is produced in the course of the work is enclosed in main transformer, do not allow this electromagnetic interference by the cable casing outside of preaching, thereby the electromagnetic interference of guaranteeing to be arranged in the main transformer room that transformer produced can not exert an influence to each electric component in the adjacent main circuit chamber yet;

2), the upside of main circuit chamber is provided with louvre adjacent one another are and ventilation hole, the upside of main transformer room is provided with second cooling fan that works alone, therefore the heat that produces in main transformer room and the main circuit chamber has all been done radiating treatment separately, thereby it is happy to make that whole cabinet ventilates, and radiating effect is good.

3), the location layout of each electric component is reasonable in the cabinet, has reduced the electromagnetic interference problem between the individual parts further.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the end view that is positioned at main circuit chamber one side of Fig. 1;

Fig. 3 is the heat dissipation path schematic diagram of main transformer room;

Fig. 4 is the heat dissipation path schematic diagram of louvre in the main circuit chamber;

Fig. 5 is the heat dissipation path schematic diagram of first cooling fan in the main circuit chamber;

Fig. 6 is the structural scheme of mechanism of first cooling fan in the main circuit chamber;

Fig. 7 is the partial enlarged drawing at the first cooling fan export pipeline place among Fig. 6.

Embodiment

As shown in Figure 1, a kind of cabinet that is used to install photovoltaic DC-to-AC converter, be provided with main transformer room adjacent one another are 10 and main circuit chamber 20 in this cabinet, be provided with the division board 30 that is used for electromagnetic isolation and heat isolation between described main transformer room 10 and the main circuit chamber 20.

Division board 30 has been isolated electromagnetic interference and the heat conduction between main transformer room 10 and the main circuit chamber 20 effectively, has guaranteed the operation efficiently and stably of whole system.

As shown in Figure 6, the downside of described IGBT power model 22 has been arranged side by side DC filter 24 and alternating current filter 25, and the dc bus that links to each other with IGBT power model 22 row 26 is from top to bottom linearly to be electrically connected with DC filter 24.

Dotted line shown in Fig. 6 is traditional dc bus row's a trend, and since the row of the dc bus in the utility model 26 do not intersect with any AC line, thereby reduced interference between the circuit, improved the quality of power supply.

Shown in Fig. 1～5, the bottom of described main circuit chamber 20 is provided with reactor 21, top is provided with IGBT power model 22 adjacent one another are and main circuit board 27, one side of IGBT power model 22 is provided with heat dissipation wind channel, the downside of heat dissipation wind channel is provided with first cooling fan 60, and the upside of heat dissipation wind channel is provided with the louvre 61 that connects 20 tops, main circuit chamber; The middle part of main circuit chamber 20 is provided with circuit breaker 23.

Shown in Fig. 1,3, the upside of described main circuit chamber 20 is provided with the ventilation hole 50 adjacent with louvre 61; Shown in Fig. 1,3,4, the upside of described main transformer room 10 is provided with second cooling fan 40; Shown in Fig. 3,4, the casing downside of cabinet is provided with the air inlet 70 that leads to main transformer room 10 and main circuit chamber 20 respectively.

Shown in Fig. 5,6,7, the heat dissipation wind channel in described first cooling fan 60 exits is provided with the ventilation slot 62 of opening towards IGBT power model 22 and main circuit board.

The outlet of described ventilation slot 62 towards and the pipeline of heat dissipation wind channel trend between have angle, and described angle is 45 °.

The edge of described ventilation slot 62 is a rectangle perpendicular to the cross sectional shape of gas flow, and the length of the square-section of described ventilation slot 62 is 200mm, and width is 15mm.

Shown in Fig. 6,7, the pipeline that the length direction of the square-section of described ventilation slot 62 and first cooling fan 60 are positioned at the heat dissipation wind channel at ventilation slot 62 places moves towards perpendicular.

Elaborate below in conjunction with the heat radiation approach of accompanying drawing to this cabinet:

As shown in Figure 3, for main transformer room 10, its top is provided with second cooling fan 40, and the bottom is provided with air inlet 70.During heat radiation, the work of second cooling fan 40, wind enters main transformer room 10 from air inlet 70 places, through with transformer 11 heat exchange after by second cooling fan, 40 places discharge casing.

For main circuit chamber 20, when inverter is worked, its heat radiation approach is divided into two-way, wherein one tunnel air inlet 70 from 20 bottoms, main circuit chamber enters main circuit chamber 20, and discharge casing through the heat dissipation wind channel and the louvre 61 of first cooling fan 60, first cooling fan, 60 upsides, the arrow trend of the band dovetail groove shown in Fig. 4,5 successively; Rise at other one tunnel self-ventilation groove 62 places, and by way of IGBT power model 22 and main circuit board, ventilation hole 50 places of last slave box top discharge casing, the trend of small arrow as shown in Figure 5.

The utility model under the situation of the cooling fan that adopts smaller power and less other filtering techniques, has solved insoluble electromagnetic interference problem and thermally-stabilised problem in the conventional inverter compared with the prior art well.The photovoltaic DC-to-AC converter that adopts the technical scheme in the utility model to install, when the TUV authentication test, not only test speed is fast, and the interference value of measuring is very low, disturbs the mean value in the peakedness ratio standard also low; And in thermally-stabilised test, under the situation of excess load 10%, every index of inverter is all qualified.

Claims

1. A cabinet for installing a photovoltaic inverter, characterized in that: the cabinet is provided with a main transformer room (10) and a main circuit room (20) adjacent to each other, and the main transformer room (10) An isolation plate (30) for electromagnetic isolation and thermal isolation is arranged between the main circuit room (20).

2. The chassis for installing photovoltaic inverters according to claim 1, characterized in that: the lower part of the main circuit room (20) is provided with a reactor (21), and the upper part is provided with adjacent IGBTs The power module (22) and the main circuit board, one side of the IGBT power module (22) is provided with a cooling air duct, the lower side of the cooling air duct is provided with a first cooling fan (60), and the upper side of the cooling air duct is provided with a through The heat dissipation holes (61) on the top of the main circuit chamber (20); the middle part of the main circuit chamber (20) is provided with a circuit breaker (23).

3. The chassis for installing photovoltaic inverters according to claim 2, characterized in that: the cooling air duct at the outlet of the first cooling fan (60) is provided with an opening facing the IGBT power module (22) and Ventilation slots (62) for the main circuit board.

4. The chassis for installing photovoltaic inverters according to claim 2, characterized in that: a DC filter (24) and an AC filter (25) are arranged side by side on the lower side of the IGBT power module (22) ), the DC bus bar (26) connected to the IGBT power module (22) is electrically connected to the DC filter (24) in a straight line from top to bottom.

5 . The chassis for installing photovoltaic inverters according to claim 3 , characterized in that: the direction of the exit of the ventilation slot ( 62 ) forms an included angle with the pipeline direction of the heat dissipation air duct. 5 .

6 . The chassis for installing photovoltaic inverters according to claim 5 , wherein the included angle is 45°.

7. The cabinet for installing photovoltaic inverters according to claim 2, 5 or 6, characterized in that: the ventilation groove (62) has a rectangular cross-sectional shape perpendicular to the gas flow direction.

8. The chassis for installing photovoltaic inverters according to claim 7, characterized in that: the length direction of the rectangular section of the ventilation slot (62) is the same as that of the first cooling fan (60) located in the ventilation slot (62) ) The pipeline direction of the heat dissipation air duct is perpendicular to each other.

9. The chassis for installing photovoltaic inverters according to claim 7, characterized in that: the length of the rectangular section of the ventilation groove (62) is 200mm, and the width is 15mm.

10. The chassis for installing photovoltaic inverters according to claim 1, 2 or 4, characterized in that: the upper side of the main transformer room (10) is provided with a second cooling fan (40), the main The upper side of the circuit room (20) is provided with ventilation holes (50) adjacent to the heat dissipation holes (61); air inlet (70).