Anti-islanding device for new energy grid-connected power supply

Abstract

The invention discloses an anti-islanding device for new energy grid-connected power supply, and particularly relates to the technical field of anti-islanding equipment.The anti-islanding device comprises a box body, a control panel is arranged on the front portion of the box body, the control panel is mainly composed of a display screen, indicator lights and control keys, and heat dissipation openings are formed in the left side and the right side of the box body; a terminal strip is fixedly installed on the lower portion of the rear end of the box body, an installation device is fixedly installed at the rear end of the box body, an anti-disengaging device is arranged above the terminal strip, and a filter screen is installed in the heat dissipation opening. According to the anti-islanding device for new energy grid-connected power supply, the dust removal device is arranged to clean the filter screen, and it is avoided that dust is accumulated to block the filter screen to affect the air exhaust and heat dissipation effect; by arranging the anti-falling device, the lead installed on the terminal strip can be fixed and locked, the situation that the lead is pulled by the outside and falls off is avoided, and unnecessary faults such as short circuit are prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of anti-islanding equipment, and in particular to an anti-islanding device for new energy grid-connected power supply. Background Art

[0002] The anti-islanding protection device is mainly used to prevent the islanding effect in the power grid. Islanding is an electrical phenomenon that occurs when a part of the power grid is disconnected from the main power grid. This part of the power grid is completely powered by the photovoltaic system. Because islanding will endanger the safety of the public and power company maintenance personnel and the quality of power supply, photovoltaic power stations must be equipped with anti-islanding devices. When islanding occurs, the grid connection point can be quickly cut off, so that the station is quickly disconnected from the grid side, thereby ensuring the safety of the entire power station and related maintenance personnel. The anti-islanding protection device is mainly suitable for small power grid-connected power supply systems of 110KV, 66KV, 35KV, 10KV and low-voltage 380V photovoltaic power stations.

[0003] However, commonly used anti-islanding protection devices are usually installed and fixed in distribution cabinets or other suitable locations using a large number of bolts. During the process of disassembling, inspecting and reinstalling the anti-islanding protection device, special tools such as wrenches are required to remove or tighten the large number of bolts in sequence before the disassembly and installation of the anti-islanding protection device can be completed. The operation process is cumbersome, time-consuming and labor-intensive, and the work efficiency is low. In addition, the anti-islanding protection device usually has heat dissipation holes to dissipate heat and cool the interior. After long-term use, the heat dissipation holes are easily clogged with dust, and the heat dissipation effect is not ideal. When the anti-islanding protection device is running, the electrical components installed inside it will generate a lot of heat, which may easily cause the heat to not be dissipated in time, and then easily cause the electrical components installed inside the anti-islanding protection device to be damaged by high temperature, resulting in the anti-islanding protection device being unable to operate stably. At the same time, a terminal block is provided on the anti-islanding protector to connect a suitable wiring harness. Once the connection of the wiring harness becomes loose, a short circuit may occur, affecting the normal use of the anti-islanding protector. For this reason, we propose an anti-islanding protection device to solve the above problems. Summary of the Invention

[0004] The main purpose of the present invention is to provide an anti-islanding device for renewable energy grid-connected power supply, which can effectively solve the problems in the background technology.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A new energy grid-connected power supply anti-islanding device includes a box body, a control panel is provided at the front of the box body, the control panel mainly consists of a display screen, indicator lights and control buttons, heat dissipation vents are provided on both sides of the box body, a terminal block is fixedly installed at the lower rear end of the box body, a mounting device is fixedly installed at the rear end of the box body, an anti-slip device is provided above the terminal block, a filter is installed in the heat dissipation vent, and a dust removal device for removing dust from the filter is provided in the box body.

[0007] Preferably, the anti-slip device includes a fixed plate, a movable plate and a locking tube, the fixed plate is fixedly installed in the middle of the rear end of the box body, and fixed rods are fixedly installed on the left and right sides of the upper end of the fixed plate, and movable holes are opened on the left and right sides of the upper end of the movable plate, the upper end of the fixed rod passes through the movable hole and is fixedly installed with a limit plate, the outer surface of the fixed rod is sleeved with a first spring, the first spring is located between the movable plate and the fixed plate, a plurality of first through holes are opened on the upper end of the fixed plate, and a second through hole corresponding to the first through hole is opened in the middle of the upper end of the movable plate, the top of the locking tube is fixedly connected to the bottom of the second through hole, the locking tube slides in the first through hole, and the outer surface of the locking tube is sleeved with a tightening sleeve.

[0008] Preferably, the locking tube includes a through tube, and a locking portion is provided at the bottom of the through tube. The locking portion is composed of a plurality of arc-shaped plates inclined outward. The locking portion is a claw-shaped structure as a whole. The claw-shaped locking portion is turned outward, and the bottom edge of the arc plate is integrally formed with a folded edge.

[0009] Preferably, the tightening sleeve is a truncated cone-shaped annular structure, and the tightening sleeve is fixedly installed at the bottom of the first through hole.

[0010] The top end of the lifting plug is connected with the support frame of the second cam, and the bottom end of the lifting plug is connected with the support frame of the second cam.

[0011] Preferably, a plurality of buffer cavities are opened inside the fixing seat, and a plurality of buffer rods are fixedly installed at the rear end of the support plate. The rear end of the buffer rod extends into the buffer cavity and is fixedly installed with a first baffle. The first baffle slides in the buffer cavity. A second spring is sleeved on the outer surface of the buffer rod, and the second spring is located between the support plate and the fixing seat.

[0012] Preferably, the front side of one end of the limiting plate close to the inserting plate is inclined toward the second baffle.

[0013] The top end of the motor is fixedly mounted on the upper side of the box body, and the bottom end of the motor is fixedly mounted on the upper side of the box body.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention discloses an anti-islanding device for grid-connected power supply of new energy, which is provided with a dust removal device. The motor drives the screw to rotate, and the screw drives the driving plate to move up and down, thereby driving the brush to clean the filter screen, thereby preventing dust accumulation from clogging the filter screen and affecting the exhaust and heat dissipation effect;

[0016] 2. The present invention discloses an anti-islanding device for grid-connected power supply of renewable energy. By arranging an anti-dropout device capable of fixing the wires above the terminal block, the wires installed on the terminal block can be fixed and locked by the locking tube of the anti-dropout device, thereby preventing the wires from being pulled off by the outside, preventing the occurrence of unnecessary faults such as short circuits, and ensuring the normal use of the anti-islanding protector. At the same time, the anti-dropout device can also play a role in arranging the wires;

[0017] 3. The present invention discloses an anti-islanding device for grid-connected power supply of new energy. By utilizing the connection and cooperation of the installation device plug-in board and the slot, the anti-islanding device can be quickly installed and fixed and quickly disassembled. The operation is convenient, time-saving and labor-saving, and the installation and disassembly operations of the anti-islanding protection device body are highly efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention from a first perspective;

[0019] Figure 2 This is a schematic diagram of the overall structure of the present invention from a second viewing angle;

[0020] Figure 3 It is a structural schematic diagram of the anti-falling device of the present invention;

[0021] Figure 4 Schematic diagram of the structure of the locking tube in the anti-slip device of the present invention;

[0022] Figure 5 It is a structural schematic diagram of the installation device of the present invention;

[0023] Figure 6 It is a schematic diagram of the overall cross-section structure of the present invention;

[0024] Figure 7 For the present invention Figure 6 Enlarged schematic diagram of point A in the middle.

[0025] In the figure: 1, box body; 2, control panel; 3, heat dissipation vent; 4, terminal block; 5, anti-drop device; 6, mounting device; 7, dust removal device; 8, filter; 51, fixing plate; 52, fixing rod; 53, first spring; 54, movable plate; 55, locking tube; 56, first through hole; 57, second through hole; 58, limit plate; 59, movable hole; 510, tightening sleeve; 551, through tube; 552, locking part; 553, folding edge; 61, mounting plate; 6 2. Support plate; 63. Fixed seat; 64. Insert plate; 65. Buffer rod; 66. First baffle; 67. Second spring; 68. Limiting plate; 69. Second baffle; 610. Movable rod; 611. Knob; 612. Third spring; 631. Buffer chamber; 621. Movable chamber; 641. Limiting groove; 622. Slot; 71. Screw rod; 72. Sliding rod; 73. Drive plate; 74. Blocking plate; 75. Motor; 76. Top plate; 101. Ash outlet. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0027] Example 1

[0028] like Figure 1-2As shown, an anti-islanding device for grid-connected power supply of renewable energy includes a box body 1, a control panel 2 is provided at the front of the box body 1, the control panel 2 is mainly composed of a display screen, indicator lights and control buttons, heat dissipation vents 3 are provided on the left and right sides of the box body 1, a terminal block 4 is fixedly installed at the lower rear end of the box body 1, a mounting device 6 is fixedly installed at the rear end of the box body 1, an anti-slip device 5 is provided above the terminal block 4, a filter screen 8 is installed in the heat dissipation vent 3, and a dust removal device 7 for removing dust from the filter screen 8 is provided in the box body 1.

[0029] During specific implementation, the anti-slip device 5 is used to fix and lock the wires to prevent the wires from being pulled by the outside and falling off, thereby preventing unnecessary faults such as short circuits and ensuring the normal use of the anti-island protector. At the same time, the anti-slip device 5 can also play a role in arranging the wires. At the same time, the dust removal device 7 cleans the filter 8 to prevent dust accumulation from clogging the filter 8 and affecting the exhaust and heat dissipation effect. The further arranged installation device 6 can realize the rapid installation and disassembly of the anti-island device.

[0030] Example 2

[0031] See Figure 3 and Figure 4 As shown, the anti-slip device 5 is further disclosed. The anti-slip device 5 includes a fixed plate 51, a movable plate 54 and a locking tube 55. The fixed plate 51 is fixedly installed in the middle of the rear end of the box body 1. Fixed rods 52 are fixedly installed on both sides of the upper end of the fixed plate 51. Active holes 59 are opened on both sides of the upper end of the movable plate 54. The upper end of the fixed rod 52 passes through the active hole 59 and is fixedly installed with a limit plate 58. The outer surface of the fixed rod 52 is sleeved with a first spring 53. The first spring 53 is located between the movable plate 54 and the fixed plate 51. A plurality of first through holes 56 are opened on the upper end of the fixed plate 51. The middle of the upper end of the movable plate 54 is opened with a first through hole. The second through hole 57 corresponding to the hole 56, the top of the locking tube 55 is fixedly connected to the bottom of the second through hole 57, the locking tube 55 slides in the first through hole 56, and the outer surface of the locking tube 55 is provided with a tightening sleeve 510, the locking tube 55 includes a through tube 551, and a locking portion 552 is provided at the bottom of the through tube 551. The locking portion 552 is composed of a plurality of outwardly inclined arc-shaped plates. The locking portion 552 has a claw-shaped structure as a whole. The claw-shaped locking portion 552 is turned outward, and the bottom edge of the arc plate is integrally formed with a folded edge 553. The tightening sleeve 510 has a truncated cone-shaped annular structure, and the tightening sleeve 510 is fixedly installed at the bottom of the first through hole 56.

[0032] When in use, when the wire enters the through tube 551 through the second through hole 57, the movable plate 54 is pressed, the first spring 53 is compressed, and then the locking tube 55 is driven to move downward, so that the locking portion 552 at the bottom of the locking tube 55 extends out from the tightening sleeve 510, and the locking portion 552 is a claw-shaped structure, and the claw-shaped locking portion 552 is turned outward, so that the locking portion 552 is opened to the surroundings without the constraint of the tightening sleeve 510, and the wire passes through the bottom of the locking portion 552, and then the movable plate 54 is loosened. The movable plate 54 moves upward under the action of the elastic force of the first spring 53, driving the locking tube 55 to move upward. Under the action of the tightening sleeve 510, the arc-shaped plate of the locking portion 552 gathers toward the middle, thereby clamping the wire to prevent the wire from being detached and having poor contact during long-term use.

[0033] Example 3

[0034] See Figure 5 and Figure 7 As shown, the mounting device 6 includes a mounting plate 61, a support plate 62 and a fixing seat 63. There are two mounting plates 61, which are fixedly mounted on the left and right sides of the rear end of the box body 1 respectively. There are two supporting plates 62. The upper and lower parts of the front end of the support plate 62 are both provided with slots 622. The upper and lower parts of the rear end of the mounting plate 61 are both fixedly installed with plug-in plates 64. The plug-in plates 64 are adapted to the slots 622. The upper end of the plug-in plate 64 at the upper end is provided with a limiting groove 641. The lower end of the plug-in plate 64 at the lower end is provided with a limiting groove 641. The inner wall of the slot 622 near the limiting groove 641 is provided. There is a movable cavity 621, and a sliding groove is opened between the movable cavity 621 and the slot 622. A second baffle 69 is slidably connected in the movable cavity 621. A limiting plate 68 is fixedly installed on the side of the second baffle 69 close to the plug plate 64. The end of the limiting plate 68 close to the plug plate 64 passes through the sliding groove and is inserted into the limiting groove 641. A movable rod 610 is fixedly installed on the end of the second baffle 69 away from the limiting plate 68. The other end of the movable rod 610 passes through the support plate 62 and is fixedly installed with a knob 611. A third spring 612 is sleeved on the outer surface of the movable rod 610, and the third spring 612 is located in the movable cavity 621.

[0035] During installation, it is only necessary to insert the plug plate 64 into the slot 622, and then the limiting plate 68 enters the limiting groove 641 under the action of the elastic force of the third spring 612, thereby limiting the movement of the plug plate 64, thereby completing the installation of the anti-islanding device. When disassembly is required, it is only necessary to pull the knob 611 outward, thereby driving the limiting plate 68 away from the limiting groove 641 through the movable rod 610 and the second baffle 69, thereby pulling the plug plate 64 out of the slot 622, thereby completing the disassembly of the anti-islanding device, thereby realizing convenient installation and disassembly of the islanding device.

[0036] Furthermore, a plurality of buffer cavities 631 are opened inside the fixed seat 63, and a plurality of buffer rods 65 are fixedly installed at the rear end of the support plate 62. The rear end of the buffer rod 65 extends into the buffer cavity 631 and is fixedly installed with a first baffle 66. The first baffle 66 slides in the buffer cavity 631. A second spring 67 is sleeved on the outer surface of the buffer rod 65, and the second spring 67 is located between the support plate 62 and the fixed seat 63.

[0037] Furthermore, the front side of one end of the limiting plate 68 close to the inserting plate 64 is inclined toward the second baffle 69 .

[0038] Example 4

[0039] See Figure 6 As shown, the dust removal device 7 is further disclosed. The dust removal device 7 includes a screw rod 71, a sliding rod 72 and a top plate 76. The top plate 76 is fixedly mounted on the upper side wall of the box body 1, and the top plate 76 is located above the heat dissipation port 3. The screw rod 71 is rotatably connected to the front side of the bottom wall of the box body 1, and the sliding rod 72 is fixedly connected to the rear side of the bottom wall of the box body 1. The screw rod 71 and the sliding rod 72 are located on both sides of the heat dissipation port 3. The upper end of the screw rod 71 is rotatably connected to the top plate 76, and the upper end of the sliding rod 72 is fixedly connected to the top plate 76. The outer surfaces of the screw rod 71 and the sliding rod 72 are commonly penetrated by a drive plate 73. The drive plate 73 is threadedly connected to the screw rod 71, and the drive plate 73 is slidably connected to the sliding rod 72. A blocking plate 74 is fixedly installed at the bottom of the drive plate 73, and the drive plate 73 is close to the filter A brush is fixedly installed on one side of the net 8, and the brush is in close contact with the filter screen 8. A dust outlet 101 is provided on the bottom wall of the box body 1, and the ash outlet 101 is adapted to the blocking plate 74. A rubber pad is provided on the inner wall of the ash outlet 101. A motor 75 is fixedly installed on the upper end of the top plate 76. The output end of the motor 75 is fixedly connected to the screw rod 71. When in use, the motor 75 drives the screw rod 71 to rotate, and the screw rod 71 drives the driving plate 73 to move up and down. The driving plate 73 drives the brush to clean the filter screen 8, and the cleaned dust is discharged from the ash outlet 101. When the dust removal device 7 is not in use, the driving plate 73 drops to the lowest position. At the same time, the blocking plate 74 at the bottom of the driving plate 73 blocks the ash outlet 101 to prevent external dust from entering the box body 1 from the ash outlet 101.

[0040] The control method of this application document is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by technicians in this field, which is common knowledge in this field. This application document is mainly used to protect mechanical devices, so this application document will no longer explain the control method and circuit connection in detail. The device is powered by a built-in power supply or an external power supply.

[0041] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-islanding device for renewable energy grid-connected power supply, characterized by: The invention comprises a box body (1), a control panel (2) is provided at the front of the box body (1), the control panel (2) mainly comprising a display screen, indicator lights and control buttons, heat dissipation vents (3) are provided on both the left and right sides of the box body (1), a terminal block (4) is fixedly mounted at the lower rear end of the box body (1), a mounting device (6) is fixedly mounted at the rear end of the box body (1), an anti-slip device (5) is provided above the terminal block (4), a filter (8) is installed in the heat dissipation vent (3), and a dust removal device (7) for removing dust from the filter (8) is provided in the box body (1).

2. The anti-islanding device for renewable energy grid-connected power supply according to claim 1, characterized in that: The anti-slip device (5) comprises a fixed plate (51), a movable plate (54) and a locking tube (55). The fixed plate (51) is fixedly mounted at the middle of the rear end of the box body (1). Fixed rods (52) are fixedly mounted on both the left and right sides of the upper end of the fixed plate (51). Movable holes (59) are opened on both the left and right sides of the upper end of the movable plate (54). The upper end of the fixed rod (52) passes through the movable hole (59) and is fixedly mounted on a limiting plate (58). The outer surface of the fixed rod (52) is sleeved with a first spring ( 53), the first spring (53) is located between the movable plate (54) and the fixed plate (51), a plurality of first through holes (56) are provided at the upper end of the fixed plate (51), a second through hole (57) corresponding to the first through hole (56) is provided at the middle of the upper end of the movable plate (54), the top of the locking tube (55) is fixedly connected to the bottom of the second through hole (57), the locking tube (55) slides in the first through hole (56), and the outer surface of the locking tube (55) is provided with a tightening sleeve (510).

3. The anti-islanding device for renewable energy grid-connected power supply according to claim 2, characterized in that: The locking tube (55) comprises a through tube (551), a locking portion (552) is provided at the bottom of the through tube (551), the locking portion (552) is composed of a plurality of outwardly inclined arc-shaped plates, the locking portion (552) is in a claw-shaped structure as a whole, the claw-shaped locking portion (552) is turned outward, and a folded edge (553) is integrally formed on the bottom edge of the arc-shaped plate.

4. The anti-islanding device for renewable energy grid-connected power supply according to claim 2, characterized in that: The tightening sleeve (510) is a truncated cone-shaped annular structure, and the tightening sleeve (510) is fixedly mounted on the bottom of the first through hole (56).

5. The anti-islanding device for renewable energy grid-connected power supply according to claim 1, characterized in that: The mounting device (6) comprises a mounting plate (61), a support plate (62) and a fixing seat (63). Two mounting plates (61) are provided. The two mounting plates (61) are fixedly installed on the left and right sides of the rear end of the box body (1). Two supporting plates (62) are provided. The upper and lower parts of the front end of the supporting plate (62) are both provided with slots (622). The upper and lower parts of the rear end of the mounting plate (61) are both fixedly provided with plug-in plates (64). The plug-in plates (64) are adapted to the slots (622). The upper end of the plug-in plate (64) located at the upper part is provided with a limiting slot (641), and the lower end of the plug-in plate (64) located at the lower part is provided with a limiting slot (641). The inner wall of the slot (622) close to the limiting slot (641) is provided with a movable Cavity (621), a sliding groove is provided between the movable cavity (621) and the slot (622), a second baffle (69) is slidably connected in the movable cavity (621), a limiting plate (68) is fixedly installed on the side of the second baffle (69) close to the plug plate (64), the end of the limiting plate (68) close to the plug plate (64) passes through the sliding groove and is inserted into the limiting groove (641), a movable rod (610) is fixedly installed on the end of the second baffle (69) away from the limiting plate (68), the other end of the movable rod (610) passes through the support plate (62) and is fixedly installed with a knob (611), the outer surface of the movable rod (610) is provided with a third spring (612), and the third spring (612) is located in the movable cavity (621).

6. The anti-islanding device for renewable energy grid-connected power supply according to claim 5, characterized in that: A plurality of buffer cavities (631) are provided inside the fixing seat (63), and a plurality of buffer rods (65) are fixedly installed at the rear end of the support plate (62). The rear end of the buffer rod (65) extends into the buffer cavity (631) and is fixedly installed with a first baffle (66). The first baffle (66) slides in the buffer cavity (631). A second spring (67) is sleeved on the outer surface of the buffer rod (65), and the second spring (67) is located between the support plate (62) and the fixing seat (63).

7. The anti-islanding device for renewable energy grid-connected power supply according to claim 5, characterized in that: The front side of one end of the limiting plate (68) close to the inserting plate (64) is inclined toward the second baffle (69).

8. The anti-islanding device for renewable energy grid-connected power supply according to claim 1, characterized in that: The dust removal device (7) comprises a screw rod (71), a sliding rod (72) and a top plate (76), wherein the top plate (76) is fixedly mounted on the upper side wall of the box body (1), and the top plate (76) is located above the heat dissipation port (3). The screw rod (71) is rotatably connected to the front side of the bottom wall of the box body (1), and the sliding rod (72) is fixedly connected to the rear side of the bottom wall of the box body (1). The screw rod (71) and the sliding rod (72) are located on both sides of the heat dissipation port (3). The upper end of the screw rod (71) is rotatably connected to the top plate (76), and the upper end of the sliding rod (72) is fixedly connected to the top plate (76). The outer surfaces of the screw rod (71) and the sliding rod (72) are penetrated by a driving The movable plate (73) is threadedly connected to the screw rod (71), and the driving plate (73) is slidably connected to the sliding rod (72). A blocking plate (74) is fixedly installed at the bottom of the driving plate (73). Brushes are fixedly installed on the side of the driving plate (73) close to the filter screen (8), and the brushes are in close contact with the filter screen (8). An ash outlet (101) is provided on the bottom wall of the box body (1), and the ash outlet (101) is adapted to the blocking plate (74). A rubber pad is provided on the inner wall of the ash outlet (101). A motor (75) is fixedly installed on the upper end of the top plate (76), and the output end of the motor (75) is fixedly connected to the screw rod (71).

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