CN211320675U - Parallel three-phase four-wire three-level active power filter - Google Patents
Parallel three-phase four-wire three-level active power filter Download PDFInfo
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- CN211320675U CN211320675U CN202020132524.7U CN202020132524U CN211320675U CN 211320675 U CN211320675 U CN 211320675U CN 202020132524 U CN202020132524 U CN 202020132524U CN 211320675 U CN211320675 U CN 211320675U
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/20—Active power filtering [APF]
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Abstract
The utility model relates to a parallel three-phase four-wire system three-level active power filter, belonging to the technical field of active power filter devices, which is characterized in that the filter comprises a box body and a filter circuit arranged in the box body, one side of the box body is provided with an operation opening, the operation opening is provided with an operation door for sealing the operation opening, and the operation door is provided with a heat dissipation opening penetrating through the operation door; a heat dissipation window for sealing the heat dissipation port is arranged at the heat dissipation port; the heat dissipation window comprises a window body which is detachably connected with the operation door, and the surface of the heat dissipation window is provided with a vent which penetrates through the heat dissipation window; a plurality of mutually parallel dust shielding grating pieces are arranged at the vent, and two ends of each dust shielding grating piece are fixedly connected with the window body; the dust-shielding grating sheet is inclined downwards from one side close to the box body to one side far away from the box body. The utility model discloses can convenient and fast clear up the dust of the last ventilation position department of operating door.
Description
Technical Field
The utility model belongs to the technical field of power filter device, especially, relate to an active power filter of three levels of parallelly connected type three-phase four-wire system.
Background
An Active Power Filter (APF) is a novel power electronic device for dynamically inhibiting harmonic waves and compensating reactive power, can quickly track and compensate harmonic waves with different sizes and frequencies, is called as an active power, and compared with a passive LC filter, the active power filter can only passively absorb the harmonic waves with fixed frequency and fixed frequency, and the APF can sample load current and separate each harmonic wave from reactive power to control and actively output the size, frequency and phase of the current, quickly respond, offset corresponding current in the load, realize dynamic tracking compensation, and can compensate the harmonic waves, the reactive power and unbalance. The active power filter can be classified into a series type and a parallel type according to the mode of accessing the active power filter to a power grid. The parallel active power filter is mainly suitable for harmonic current cancellation, reactive compensation and unbalanced current balance in a three-phase system of a current source type nonlinear load. The parallel active filter is mature in technology at present, and is an active filter topological structure which is most widely applied at present. According to different wiring modes of circuits, the parallel active filter can be divided into a three-phase three-wire system type and a three-phase four-wire system type.
The existing parallel three-phase four-wire system three-level active power filter structurally comprises a box body and a filter circuit arranged in the box body, wherein an operation opening is formed in one side of the box body, and an operation door for sealing the operation opening is arranged at the operation opening. In order to ensure ventilation and heat dissipation inside the box body, heat dissipation holes are usually formed in the operation door. After the parallel three-phase four-wire three-level active power filter is used for a long time, the ventilation holes are easily blocked by deposited dust in the external environment, the heat dissipation inside the box body is affected, and the dust at the ventilation holes needs to be cleaned.
When an operation door of the existing parallel three-phase four-wire system three-level active power filter is cleaned, a brush and water are required to be used for repeatedly cleaning, and the position of a heat dissipation hole of the operation door of the existing parallel three-phase four-wire system three-level active power filter is inconvenient to clean.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims at providing a three level active power filter of parallelly connected type three-phase four-wire system, can convenient and fast clear up the dust of ventilation position department on the operating door.
The above object of the present invention is achieved by the following technical solutions: a parallel three-phase four-wire system three-level active power filter comprises a box body and a filter circuit arranged in the box body, wherein an operation opening is formed in one side of the box body, an operation door for sealing the operation opening is arranged at the operation opening, and a heat dissipation opening penetrating through the operation door is formed in the operation door; a heat dissipation window for sealing the heat dissipation port is arranged at the heat dissipation port; the heat dissipation window comprises a window body detachably connected with the operation door, and a ventilation opening penetrating through the heat dissipation window is formed in the surface of the heat dissipation window; a plurality of mutually parallel dust shielding grating pieces are arranged at the air vent, and two ends of each dust shielding grating piece are fixedly connected with the window body; the dust-shielding grating sheet is inclined downwards from one side close to the box body to one side far away from the box body.
By adopting the technical scheme, the heat dissipation port is arranged on the operation door, the heat dissipation window is arranged on the heat dissipation port, the inside of the box body is ventilated and radiated through the ventilation opening on the window body of the heat dissipation window, and the dust shielding grid sheets are downwards inclined from one side close to the box body to one side far away from the box body through the plurality of ventilation openings, so that the dust outside enters the box body; the heat dissipation window adopts to dismantle with the operation door and is connected, and then can convenient and fast dismantle the heat dissipation window to the dust of convenience between to the dust-shielding grid piece clears up, reduces the dust and to the radiating influence of operation door department ventilation.
The utility model discloses further set up to: an annular mounting plate parallel to the surface of the operation door is fixed on the peripheral wall of the heat dissipation opening, and a plurality of connecting nuts are fixedly arranged on the surface of one side, close to the heat dissipation window, of the annular mounting plate; a plurality of mounting columns used for being abutted against the connecting nuts are fixed on the surface of one side, close to the annular mounting plate, of the window body; the mounting post is provided with a mounting step hole which penetrates through the mounting post along the axial direction of the mounting post, and a connecting bolt which is in threaded connection with a connecting nut is arranged in the mounting step hole.
Through adopting above-mentioned technical scheme, through the erection column with on the window body with coupling nut alignment butt, and then through installing connecting bolt into the installation step downthehole to with connecting bolt and coupling nut threaded connection, thereby can convenient and fast fix the heat dissipation window in vent position department.
The utility model discloses further set up to: the ventilation hole position department between cyclic annular mounting panel and the radiator window is provided with hides the dirt net, cyclic annular mounting panel department is provided with and carries out the fixed subassembly relatively with cyclic annular mounting panel with hiding the dirt net.
Through adopting above-mentioned technical scheme, be provided with through ventilation hole position department between cyclic annular mounting panel and heat dissipation window and hide the dirt net, and then further hide dirt processing to ventilation opening department through hiding the dirt net, reduce external dust and enter into the box by the vent.
The utility model discloses further set up to: the dust shielding net comprises a net body and a net frame which is positioned at the edge of the net body and fixedly connected with the net body, and a plurality of positioning grooves which penetrate through the net frame along the thickness direction of the net frame are formed in the position of the edge of the net frame; the fixing assembly comprises a plurality of positioning columns for abutting and positioning the groove walls of the positioning grooves, and the positioning columns are located on one side surface, close to the heat dissipation window, of the annular mounting plate and are fixedly connected with the annular mounting plate.
Through adopting above-mentioned technical scheme, through the constant head tank at the dictyosome edge that hides the dirt net, set up the reference column at a side surface that cyclic annular mounting panel is close to the radiator window, and then through the cell wall butt of reference column and constant head tank, and then convenient and fast installs the location to hiding the dirt net.
The utility model discloses further set up to: the end part of the positioning column is provided with a positioning baffle piece for abutting against the surface of the screen frame, and the positioning baffle piece is hinged with the positioning column around the end part of the positioning column.
Through adopting above-mentioned technical scheme, the tip of reference column is provided with the location separation blade that is used for net frame surface butt to the location separation blade is articulated with the reference column around the tip of reference column, and then through rotating the location separation blade, uses the location separation blade to carry out the butt to the surface of net frame, and then convenient and fast will hide the dirt net and fix on cyclic annular mounting panel.
The utility model discloses further set up to: and a plurality of lifting rings for lifting and moving the box body are fixed on the top surface of the box body.
Through adopting above-mentioned technical scheme, be used for carrying out hoist and mount removal rings to the box through being fixed with a plurality of at the top surface of box, and then through rings, conveniently hoist and remove hoist and mount to the box.
The utility model discloses further set up to: and a flexible cushion pad is fixed on the bottom surface of the box body.
Through adopting above-mentioned technical scheme, the bottom surface of box is fixed with flexible blotter, and then hoists at the box and remove when placing, reduces and is placing subaerially the box, reduces the impact of ground to the box.
To sum up, the utility model discloses a beneficial technological effect does:
1. the operation door is provided with the heat dissipation port, the heat dissipation window is arranged on the heat dissipation port, the interior of the box body is ventilated and dissipated through the ventilation opening on the window body of the heat dissipation window, and the dust shielding grid sheets are downwards inclined from one side close to the box body to one side far away from the box body through the plurality of ventilation openings, so that the dust outside is prevented from entering the box body; the heat dissipation window adopts to dismantle with the operation door and is connected, and then can convenient and fast dismantle the heat dissipation window to the dust of convenience between to the dust-shielding grid piece clears up, reduces the dust and to the radiating influence of operation door department ventilation.
2. Through the butt of aligning erection column on with the window body with coupling nut, and then through installing into the mounting step downthehole with coupling bolt to with coupling bolt and coupling nut threaded connection, thereby can convenient and fast fix the heat dissipation window in vent position department.
3. Be provided with through the ventilation hole position department between cyclic annular mounting panel and heat dissipation window and hide the dirt net, through the constant head tank at the dictyosome edge that hides the dirt net, a side surface that is close to the heat dissipation window at cyclic annular mounting panel sets up the reference column, and then the cell wall butt through reference column and constant head tank, and then convenient and fast installs the location to hiding the dirt net, through rotating the location separation blade, uses the location separation blade to carry out the butt to the surface of net frame, and then convenient and fast will hide the dirt net and fix on cyclic annular mounting panel.
Drawings
Fig. 1 is a schematic structural diagram of a parallel three-phase four-wire three-level active power filter;
FIG. 2 is a schematic structural view showing a connection relationship between a heat dissipation window and an operation door;
FIG. 3 is a schematic view of a heat dissipating window;
FIG. 4 is a schematic view of a structure embodying a heat sink;
fig. 5 is a schematic view of the structure of the dust-shielding net.
1. A box body; 11. an operation port; 2. an operating door; 21. a heat dissipation port; 3. a heat dissipation window; 31. a window body; 311. a vent; 32. a dust-shielding grid sheet; 33. mounting a column; 331. mounting a step hole; 4. an annular mounting plate; 41. a connecting nut; 42. a connecting bolt; 5. a dust shielding net; 51. a net body; 52. a screen frame; 521. positioning a groove; 6. a fixing assembly; 61. a positioning column; 62. positioning a baffle plate; 7. a hoisting ring; 8. a flexible cushion.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The utility model provides an active power filter of three levels of parallelly connected type three-phase four-wire system, refers to fig. 1, includes box 1 and sets up the filter circuit in box 1 inside, and operation mouth 11 has been seted up to one side of box 1, and operation mouth 11 department is provided with carries out confined operation door 2 to operation mouth 11, and one side of operation door 2 is articulated with box 1 around vertical axis. The filter circuit is isolated and protected through the box body 1 and the operation door 2, and then damage of the external environment to the filter circuit is reduced.
Referring to fig. 1, a plurality of lifting rings 7 for lifting and moving the box body 1 are fixed on the top surface of the box body 1. The bottom surface of box 1 is fixed with flexible blotter 8, and flexible blotter 8 adopts the rubber material. Through rings 7's setting, facilitate the use lifting device to hoist box 1 and remove, through the flexible blotter 8 that sets up in box 1's bottom surface, when hoisting box 1 and placing, cushion ground to box 1's impact to reduce the destruction to box 1.
Referring to fig. 2 and 3, the operation door 2 is provided with a heat dissipation opening 21 penetrating through the operation door 2; the heat dissipation opening 21 is provided with a heat dissipation window 3 for closing the heat dissipation opening 21. The heat dissipation window 3 comprises a window body 31 detachably connected with the operation door 2, and a vent 311 penetrating through the heat dissipation window 3 is formed in the surface of the heat dissipation window 3. A plurality of dust shielding grating sheets 32 which are parallel to each other are arranged at the air vent 311, and two ends of the dust shielding grating sheets 32 are fixedly connected with the window body 31; the dust-shielding grille plate 32 is inclined downward from the side close to the case 1 to the side far from the case 1. The air passing through the inside and outside of the case 1 can flow and exchange through the ventilation opening 311 of the heat radiation window 3, and further, the inside of the case 1 can be well radiated. By providing the dust-shielding grid plate 32 at the ventilation opening 311, the dust from the outside is prevented from entering the interior of the case 1 through the ventilation opening 311. When the dust covering grid sheet 32 is contaminated with dust, the heat dissipation window 3 is detached from the ventilation opening 311, and the heat dissipation window 3 is cleaned conveniently, so that the heat dissipation window 3 is fixed at the heat dissipation opening 21 after the cleaning is completed.
Referring to fig. 3 and 4, a ring-shaped mounting plate 4 parallel to the surface of the operation door 2 is fixed to the peripheral wall of the heat dissipation opening 21, and a plurality of coupling nuts 41 are fixed to a surface of the ring-shaped mounting plate 4 on a side close to the heat dissipation window 3. A plurality of mounting posts 33 for abutting against the coupling nuts 41 are fixed to one side surface of the window 31 adjacent to the annular mounting plate 4. The mounting post 33 is provided with a mounting stepped hole 331 penetrating the mounting post 33 in the axial direction of the mounting post 33, and a coupling bolt 42 screwed to the coupling nut 41 is provided in the mounting stepped hole 331. When the heat radiation window 3 is mounted, the mounting post 33 of the heat radiation window 3 is aligned with the coupling nut 41, and is screwed with the coupling nut 41 using the coupling bolt 42, thereby fixing the heat radiation window 3 at the position of the heat radiation opening 21.
Referring to fig. 4, a dust shielding net 5 is disposed at a position of a vent hole between the annular mounting plate 4 and the heat dissipation window 3, and a fixing member 6 for fixing the dust shielding net 5 and the annular mounting plate 4 relatively is disposed at the annular mounting plate 4. The dust shielding net 5 is fixed at the position of the heat radiating opening 21 through the fixing component 6, so that the situation that external dust enters the box body 1 from the position of the heat radiating opening 21 can be effectively reduced.
Referring to fig. 4 and 5, the fixing assembly 6 includes a plurality of positioning posts 61 and a plurality of positioning stoppers 62 respectively disposed on the positioning posts 61. The positioning column 61 is located on one side surface of the annular mounting plate 4 close to the heat radiation window 3 and the annular mounting plate 4 is fixedly connected. The positioning baffle 62 is hinged with the positioning column 61 around the end of the positioning column 61. The dust shielding net 5 comprises a net body 51 and a net frame 52 which is positioned at the edge of the net body 51 and fixedly connected with the net body 51, wherein a plurality of positioning grooves 521 which penetrate through the net frame 52 along the thickness direction of the net frame 52 are formed at the edge of the net frame 52. The positioning posts 61 are used for positioning the positioning slots 521 of the screen frame 52, and further installing and positioning the dust shielding screen 5. By rotating the positioning block piece 62, the positioning block piece 62 abuts against the surface of the screen frame 52, and the dust shielding screen 5 is conveniently and quickly fixed at the position of the heat dissipation opening 21.
The implementation principle of the embodiment is as follows:
the operation door 2 is provided with a heat radiation port 21 penetrating through the operation door 2; the heat dissipation window 3 for sealing the heat dissipation opening 21 is disposed at the heat dissipation opening 21, and ventilation and heat dissipation are performed on the inside of the box body 1 through the ventilation opening 311 on the heat dissipation window 3. By providing the dust-shielding grid plate 32 at the ventilation opening 311, the dust from the outside is prevented from entering the interior of the case 1 through the ventilation opening 311. When the dust of dust-shielding grid sheet 32 department adhesion is more, with heat dissipation window 3 by thermovent 21 department dismantlement, and then conveniently clear up the dust of adhesion in dust-shielding grid sheet 32 department to reduce the influence of dust to the inside heat dissipation ventilation of box 1. The groove wall of the positioning groove 521 of the net frame 52 of the dust shielding net 5 is abutted against the positioning column 61, and then the positioning baffle sheet 62 is rotated to abut against the net frame 52, and further the dust shielding net 5 is fixed on the annular mounting plate 4. The positioning post 61 of the heat dissipation window 3 is abutted against the positioning nut, and the heat dissipation window 3 is fixed to the heat dissipation opening 21 by the engagement of the connecting bolt 42 and the connecting nut 41.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (7)
1. The utility model provides an active power filter of three levels of parallelly connected type three-phase four-wire system, includes box (1) and sets up the filter circuit in box (1) inside, operation mouth (11) have been seted up to one side of box (1), operation mouth (11) department is provided with carries out confined operation door (2), its characterized in that to operation mouth (11): the operating door (2) is provided with a heat dissipation port (21) penetrating through the operating door (2); a heat dissipation window (3) for sealing the heat dissipation opening (21) is arranged at the heat dissipation opening (21); the heat dissipation window (3) comprises a window body (31) detachably connected with the operation door (2), and a ventilation opening (311) penetrating through the heat dissipation window (3) is formed in the surface of the heat dissipation window (3); a plurality of dust shielding grid sheets (32) which are parallel to each other are arranged at the ventilation opening (311), and two ends of each dust shielding grid sheet (32) are fixedly connected with the window body (31); the dust-shading grille sheet (32) inclines downwards from one side close to the box body (1) to one side far away from the box body (1).
2. A parallel three-phase four-wire three-level active power filter according to claim 1, wherein: an annular mounting plate (4) parallel to the surface of the operation door (2) is fixed on the peripheral wall of the heat dissipation opening (21), and a plurality of connecting nuts (41) are fixedly arranged on the surface of one side, close to the heat dissipation window (3), of the annular mounting plate (4); a plurality of mounting columns (33) used for being abutted with the connecting nuts (41) are fixed on the surface of one side, close to the annular mounting plate (4), of the window body (31); the mounting column (33) is provided with a mounting step hole (331) which axially penetrates through the mounting column (33) along the mounting column (33), and a connecting bolt (42) which is in threaded connection with a connecting nut (41) is arranged in the mounting step hole (331).
3. A parallel three-phase four-wire three-level active power filter according to claim 2, wherein: the ventilation hole position department between cyclic annular mounting panel (4) and radiator window (3) is provided with hides dirt net (5), cyclic annular mounting panel (4) department is provided with and carries out relatively fixed subassembly (6) with cyclic annular mounting panel (4) with hiding dirt net (5).
4. A parallel three-phase four-wire three-level active power filter according to claim 3, wherein: the dust shielding net (5) comprises a net body (51) and a net frame (52) which is positioned at the edge of the net body (51) and fixedly connected with the net body (51), wherein a plurality of positioning grooves (521) penetrating through the net frame (52) along the thickness direction of the net frame (52) are formed in the edge of the net frame (52); the fixing assembly (6) comprises a plurality of positioning columns (61) which are used for abutting and positioning the groove wall of the positioning groove (521), and the positioning columns (61) are located on the surface of one side, close to the heat dissipation window (3), of the annular mounting plate (4) and fixedly connected with the annular mounting plate (4).
5. The parallel three-phase four-wire three-level active power filter of claim 4, wherein: the end part of the positioning column (61) is provided with a positioning baffle sheet (62) used for abutting against the surface of the screen frame (52), and the positioning baffle sheet (62) is hinged with the positioning column (61) around the end part of the positioning column (61).
6. A parallel three-phase four-wire three-level active power filter according to claim 1, wherein: the top surface of the box body (1) is fixed with a plurality of lifting rings (7) used for lifting and moving the box body (1).
7. The parallel three-phase four-wire three-level active power filter of claim 6, wherein: and a flexible buffer cushion (8) is fixed on the bottom surface of the box body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020132524.7U CN211320675U (en) | 2020-01-20 | 2020-01-20 | Parallel three-phase four-wire three-level active power filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020132524.7U CN211320675U (en) | 2020-01-20 | 2020-01-20 | Parallel three-phase four-wire three-level active power filter |
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| Publication Number | Publication Date |
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| CN211320675U true CN211320675U (en) | 2020-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020132524.7U Active CN211320675U (en) | 2020-01-20 | 2020-01-20 | Parallel three-phase four-wire three-level active power filter |
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| CN (1) | CN211320675U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112563895A (en) * | 2020-11-26 | 2021-03-26 | 广东电网有限责任公司肇庆供电局 | Protection device of electric power metering equipment |
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2020
- 2020-01-20 CN CN202020132524.7U patent/CN211320675U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112563895A (en) * | 2020-11-26 | 2021-03-26 | 广东电网有限责任公司肇庆供电局 | Protection device of electric power metering equipment |
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