Grid-connected reactive compensation control device for photovoltaic power station

Abstract

The utility model discloses a grid-connected reactive compensation control device for a photovoltaic power station. The grid-connected reactive compensation control device comprises a shell and a mounting mechanism, a reactive power meter is arranged on the upper side of the front end of the shell, and a mounting groove is formed in the rear side in the shell; the mounting mechanism comprises sliding grooves, guide sliding columns, a connecting plate, a top plate and an adjusting rod, the sliding grooves are formed in the middles of the left wall and the right wall of the mounting groove correspondingly, the guide sliding columns are arranged on the upper side and the lower side in the mounting groove correspondingly, and the guide sliding columns are slidably connected with sliding holes correspondingly formed in the left end of the connecting plate correspondingly; according to the photovoltaic power station grid-connected reactive power compensation control device, the photovoltaic power station grid-connected reactive power compensation control device can be internally supported in a corresponding installation station, and the installation position of the photovoltaic power station grid-connected reactive power compensation control device can be adjusted. The traditional mode that the photovoltaic power station grid-connected reactive compensation control device is installed and fixed through bolt body connection is replaced, operation is easy, stability is improved, and meanwhile installation and disassembly are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power equipment, in particular to a photovoltaic power station grid-connected reactive power compensation control device. Background Art

[0002] The photovoltaic power station grid-connected reactive power compensation control device is a device used to improve the reactive power factor of the photovoltaic power station when it is connected to the grid. The device detects the reactive power demand of the photovoltaic power station grid-connected point and automatically adjusts the output of the reactive compensation device to provide or absorb an appropriate amount of reactive power, thereby keeping the reactive power factor of the photovoltaic power station grid-connected point within a reasonable range;

[0003] During the use of photovoltaic power station grid-connected reactive power compensation control devices, most of them are installed and fixed by fastening bolts. After that, the reactive power of the photovoltaic power station during grid-connected operation is measured by detection equipment. The detection equipment transmits the measured data to the control equipment in real time. When the reactive power of the photovoltaic power station during grid-connected operation is insufficient or excessive, the control equipment controls the series capacitor or shunt reactor in the power grid to open or close, thereby realizing reactive power compensation or absorption, so that the reactive power factor of the system meets the standard requirements;

[0004] Although the existing photovoltaic power station grid-connected reactive power compensation control device can be installed and fixed by tightening bolts, the installation and disassembly are cumbersome, which reduces the stability of the photovoltaic power station grid-connected reactive power compensation control device. Some photovoltaic power station grid-connected reactive power compensation control devices use a torsion spring to drive the limit plate to rotate, and finally the limit plate contacts the outer surface of the installation station to replace the bolt connection. However, the elastic performance of the torsion spring will weaken after long-term use, which may easily cause the photovoltaic power station grid-connected reactive power compensation control device to fall off, thereby reducing the stability of the photovoltaic power station grid-connected reactive power compensation control device. For this reason, we propose a photovoltaic power station grid-connected reactive power compensation control device. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the existing defects and provide a photovoltaic power station grid-connected reactive power compensation control device. Through the coordinated arrangement of the adjusting rod and the pushing plate, the position of the top plate can be adjusted, so that the top plate extends from the inside of the installation groove and finally contacts the inner wall of the installation station, thereby supporting the photovoltaic power station grid-connected reactive power compensation control device inside the corresponding installation station, replacing the traditional method of installing and fixing the photovoltaic power station grid-connected reactive power compensation control device through bolt connection. The operation is simple, the stability is improved, and the installation and disassembly are also convenient, which can effectively solve the problems in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a photovoltaic power station grid-connected reactive power compensation control device, comprising a housing and a mounting mechanism;

[0007] Shell: A reactive power meter is provided on the upper side of the front end, and a mounting slot is provided on the rear side inside the shell;

[0008] The installation mechanism includes a slide groove, a guide slide column, a connecting plate, a top plate and an adjusting rod. The slide grooves are respectively arranged in the middle of the left and right walls of the installation groove. The guide slide columns are arranged at the upper and lower sides of the inside of the installation groove. The guide slide columns are respectively slidably connected with the slide holes correspondingly arranged at the left end of the connecting plate. The middle parts of the two connecting plates facing away from the outer sides are respectively provided with top plates. The top plates are respectively slidably connected with the inner walls of the laterally adjacent slide grooves. The middle part of the front end of the connecting plate is provided with an adjusting rod.

[0009] Wherein: it also includes a single-chip microcomputer, which is arranged at the front end of the shell, the input end of the single-chip microcomputer is electrically connected to the external power supply, and the reactive power meter is bidirectionally electrically connected to the single-chip microcomputer. Through the coordinated arrangement of the adjusting rod and the push plate, the position of the top plate can be adjusted, so that the top plate extends from the inside of the installation groove and finally contacts the inner wall of the installation station, thereby supporting the photovoltaic power station grid-connected reactive compensation control device inside the corresponding installation station, replacing the traditional method of installing and fixing the photovoltaic power station grid-connected reactive compensation control device through bolt connection, which is simple to operate, improves stability and is also convenient for installation and disassembly.

[0010] Furthermore, the installation mechanism also includes rubber pads, which are respectively arranged at one end of the top plate away from the inner center of the shell. The rubber pads can prevent the top plate from causing damage to the inner wall of the installation station.

[0011] Furthermore, it also includes an adjustment plate, a fixing rod and a push plate, the adjustment plate is slidably connected to the front wall of the mounting groove, the fixing rods are arranged on the left and right sides of the rear end of the adjustment plate, the push plates are arranged at the rear end of the fixing rods, and the middle part of the front end of the push plate is provided with an adjustment groove, and the adjusting rods are respectively located inside the vertically adjacent adjustment grooves, so as to adjust the position of the top plate.

[0012] Furthermore, it also includes a screw rod, which is rotatably connected to the front side of the top wall of the mounting groove through a bearing, and the screw rod is threadedly connected to a threaded hole arranged in the middle of the upper end of the adjustment plate, so that the position of the push plate can be adjusted through the adjustment plate.

[0013] Furthermore, it also includes a servo motor, which is arranged on the front side of the bottom wall of the installation groove, the upper end of the servo motor output shaft is fixedly connected to the lower end of the screw, the input end of the servo motor is electrically connected to the output end of the single-chip microcomputer, and the position of the adjustment plate can be adjusted by the screw.

[0014] Furthermore, it also includes a filter screen, which is respectively arranged in the ventilation holes opened on the front sides of the left and right ends of the shell, and the filter screen can prevent external debris from entering the interior of the shell.

[0015] Furthermore, it also includes a wire hole protection cover, which is respectively arranged in the wire holes opened on the front side of the upper end of the shell. The wire hole protection cover can protect the wire from wear or damage when entering the shell.

[0016] Compared with the prior art, the beneficial effects of the utility model are: the photovoltaic power station grid-connected reactive power compensation control device has the following advantages:

[0017] After the shell is inserted into the corresponding station, the servo motor starts to run through the control of the single-chip microcomputer, and the output shaft of the servo motor drives the screw to rotate. During the rotation of the screw, the adjusting plate is driven to move downward through the threaded connection. The adjusting plate drives the push plate to move downward through the fixed plate. During the downward movement of the push plate, the adjusting rod slides inside the adjusting groove and rotates relative to the adjusting groove, so that the push plate drives the adjusting rod to move toward the end away from the inner center of the shell. The adjusting rod drives the top plate to move toward the end away from the inner center of the shell through the connecting plate, so that the top plate extends from the inside of the installation groove. Finally, the top plate contacts the inner wall of the station through the rubber pad, thereby realizing the installation and fixation of the photovoltaic power station grid-connected reactive power compensation control device. Through the coordinated setting of the adjusting rod and the push plate, the position of the top plate can be adjusted, so that the top plate extends from the inside of the installation groove, and finally contacts the inner wall of the installation station, thereby supporting the photovoltaic power station grid-connected reactive power compensation control device inside the corresponding installation station, replacing the traditional method of installing and fixing the photovoltaic power station grid-connected reactive power compensation control device through bolt connection, which is simple to operate, improves stability, and is also convenient for installation and disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a structural schematic diagram of the installation mechanism of the utility model.

[0020] In the figure: 1 housing, 2 single chip microcomputer, 3 reactive power meter, 4 mounting slot, 5 mounting mechanism, 51 slide slot, 52 guide slide column, 53 connecting plate, 54 top plate, 55 rubber pad, 56 adjusting rod, 6 adjusting plate, 7 fixing rod, 8 push plate, 9 screw, 10 servo motor, 11 filter screen, 12 wire hole protective cover. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-2 , This embodiment provides a technical solution: a photovoltaic power station grid-connected reactive power compensation control device, including a housing 1 and a mounting mechanism 5;

[0023] Shell 1: A reactive power meter 3 is arranged on the upper side of the front end thereof, and a mounting slot 4 is arranged on the rear side of the inside of the shell 1. Before use, the photovoltaic power station grid-connected reactive power compensation control device is moved to the designated work location, and then the shell 1 is inserted into the inside of the corresponding work station, and then it is installed and fixed by a fixing device. After installation and fixation, the wires of the series capacitor or shunt reactor in the external power grid are connected to the control device. The reactive power meter 3 can measure the reactive power when the photovoltaic power station is grid-connected. The reactive power meter 3 transmits the measured data to the control device in real time. When the reactive power of the photovoltaic power station is insufficient or excessive during grid-connected operation, the control device controls the series capacitor or shunt reactor in the power grid to open or close, thereby realizing reactive power compensation or absorption, so that the reactive power factor of the system meets the standard requirements;

[0024] The mounting mechanism 5 includes a slide groove 51, a guide slide column 52, a connecting plate 53, a top plate 54 and an adjusting rod 56. The slide grooves 51 are respectively arranged in the middle of the left and right walls of the mounting groove 4. The guide slide columns 52 are arranged on the upper and lower sides inside the mounting groove 4. The guide slide columns 52 are respectively slidably connected with the sliding holes corresponding to the left ends of the connecting plates 53. The middle parts of the two connecting plates 53 facing away from the outer sides are provided with top plates 54. The top plates 54 are respectively slidably connected with the inner walls of the laterally adjacent slide grooves 51. The middle parts of the front ends of the connecting plates 53 are provided with adjusting rods 56. The mounting mechanism 5 also includes a rubber pad 55. The rubber pad 55 is respectively arranged at one end of the top plate 54 away from the inner center of the shell 1. After the shell 1 is inserted into the corresponding workstation, the driving device starts to run through the control of the control device, and the driving device drives the adjusting rod 56 to move away from the One end of the inner center of the shell 1 is moved, and the adjusting rod 56 drives the top plate 54 to move toward the end away from the inner center of the shell 1 through the connecting plate 53, so that the top plate 54 extends from the inside of the installation groove 4, and finally the top plate 54 contacts the inner wall of the station through the rubber pad 55, so as to realize the installation and fixation of the photovoltaic power station grid-connected reactive power compensation control device. Through the coordinated setting of the adjusting rod 56 and the driving device, the position of the top plate 54 can be adjusted, so that the top plate 54 extends from the inside of the installation groove 4, and finally contacts the inner wall of the installation station, and then the photovoltaic power station grid-connected reactive power compensation control device is supported inside the corresponding installation station, replacing the traditional method of installing and fixing the photovoltaic power station grid-connected reactive power compensation control device through bolt connection, which is simple to operate, improves stability and is also convenient for installation and disassembly;

[0025] Among them: it also includes a single-chip microcomputer 2, which is arranged at the front end of the shell 1, the input end of the single-chip microcomputer 2 is electrically connected to the external power supply, and the reactive power meter 3 is bidirectionally electrically connected to the single-chip microcomputer 2, which can regulate the electrical components inside the device.

[0026] Wherein: it also includes an adjusting plate 6, a fixing rod 7 and a push plate 8, the adjusting plate 6 is slidably connected to the front wall of the mounting groove 4, the fixing rods 7 are arranged on the left and right sides of the rear end of the adjusting plate 6, the push plates 8 are arranged on the rear end of the fixing rods 7, and the middle part of the front end of the push plates 8 is provided with an adjusting groove, and the adjusting rods 56 are respectively located inside the vertically adjacent adjusting grooves, the adjusting plate 6 drives the push plates 8 to move downward through the fixing plate 7, and in the process of the push plates 8 moving downward, the adjusting rods 56 slide inside the adjusting grooves and rotate relative to the adjusting grooves, so that the push plates 8 drive the adjusting rods 56 to move toward the end away from the inner center of the shell 1, and the adjusting rods 56 drive the top plate 54 to move toward the end away from the inner center of the shell 1 through the connecting plate 53, so that the top plate 54 extends from the inside of the mounting groove 4.

[0027] Among them: it also includes a screw 9, which is rotatably connected to the front side of the top wall of the mounting groove 4 through a bearing, and the screw 9 is threadedly connected to a threaded hole arranged in the middle of the upper end of the adjusting plate 6. The screw 9 drives the adjusting plate 6 to move downward through the threaded connection during the rotation process, and the adjusting plate 6 drives the push plate 8 to move downward through the fixing plate 7.

[0028] Among them: it also includes a servo motor 10, the servo motor 10 is arranged on the front side of the bottom wall of the installation groove 4, the upper end of the output shaft of the servo motor 10 is fixedly connected to the lower end of the screw 9, the input end of the servo motor 10 is electrically connected to the output end of the single-chip computer 2, after the shell 1 is inserted into the corresponding workstation, the servo motor 10 starts to run through the regulation of the single-chip computer 2, and the output shaft of the servo motor 10 drives the screw 9 to rotate, and the screw 9 drives the adjustment plate 6 to move downward through the threaded connection during the rotation.

[0029] Among them, it also includes a filter screen 11, which is respectively arranged in the ventilation holes opened on the front sides of the left and right ends of the shell 1. The filter screen 11 can prevent external debris from entering the interior of the shell 1.

[0030] Among them: it also includes a wire hole protection cover 12, which is respectively arranged in the wire holes opened on the front side of the upper end of the shell 1. The wire hole protection cover 12 can protect the wire from being worn or damaged when entering the shell 1.

[0031] The working principle of a photovoltaic power station grid-connected reactive power compensation control device provided by the utility model is as follows: before use, the photovoltaic power station grid-connected reactive power compensation control device is moved to a designated work location, and then the housing 1 is inserted into the interior of the corresponding work station, and then the servo motor 10 starts to run through the regulation of the single-chip microcomputer 2, and the output shaft of the servo motor 10 drives the screw 9 to rotate, and the screw 9 drives the adjustment plate 6 to move downward through the threaded connection during the rotation process, and the adjustment plate 6 drives the push plate 8 to move downward through the fixed plate 7, and during the downward movement of the push plate 8, the adjustment rod 56 slides inside the adjustment groove and rotates relative to the adjustment groove, so that the push plate 8 drives the adjustment rod 56 to move to the end away from the center of the interior of the housing 1, and the adjustment rod 56 is driven by the connecting plate 53 The movable top plate 54 moves toward the end away from the inner center of the shell 1, so that the top plate 54 extends from the inside of the installation groove 4. Finally, the top plate 54 contacts the inner wall of the workstation through the rubber pad 55, thereby realizing the installation and fixation of the photovoltaic power station grid-connected reactive power compensation control device. After that, the wires of the series capacitor or the shunt reactor in the external power grid are connected to the single-chip microcomputer 2. The reactive power meter 3 can measure the reactive power of the photovoltaic power station when it is connected to the grid. The reactive power meter 3 transmits the measured data to the single-chip microcomputer 2 in real time. When the reactive power of the photovoltaic power station is insufficient or excessive during the grid-connected operation, the single-chip microcomputer 2 controls the series capacitor or the shunt reactor in the power grid to open or close, thereby realizing the compensation or absorption of reactive power, so that the reactive power factor of the system meets the standard requirements.

[0032] It is worth noting that the single chip microcomputer 2 disclosed in the above embodiment can be STM8S207S8T6C, the reactive power meter 3 can be 96S1-VAR, and the servo motor 10 can be ECMA-C20604RS. The single chip microcomputer 2 controls the reactive power meter 3 and the servo motor 10 using the methods commonly used in the prior art.

[0033] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A photovoltaic power station grid-connected reactive power compensation control device, characterized in that: It comprises a housing (1) and a mounting mechanism (5); The housing (1) has a reactive power meter (3) disposed on the upper side of its front end, and a mounting groove (4) disposed on the rear side inside the housing (1); The mounting mechanism (5) comprises a slide groove (51), a guide slide column (52), a connecting plate (53), a top plate (54) and an adjusting rod (56), wherein the slide groove (51) is respectively arranged at the middle of the left and right walls of the mounting groove (4), the guide slide column (52) is arranged at the upper and lower sides inside the mounting groove (4), the guide slide column (52) is respectively slidably connected to the slide hole correspondingly arranged at the left end of the connecting plate (53), the middle of the two connecting plates (53) facing away from the outer side surfaces are respectively provided with a top plate (54), the top plate (54) is respectively slidably connected to the inner wall of the laterally adjacent slide groove (51), and the middle of the front end of the connecting plate (53) is provided with an adjusting rod (56); The single-chip microcomputer (2) is also included, and the single-chip microcomputer (2) is arranged at the front end of the housing (1), the input end of the single-chip microcomputer (2) is electrically connected to an external power supply, and the reactive power meter (3) is bidirectionally electrically connected to the single-chip microcomputer (2).

2. A photovoltaic power station grid-connected reactive power compensation control device according to claim 1, characterized in that: The mounting mechanism (5) further comprises a rubber pad (55), wherein the rubber pad (55) is respectively arranged at an end of the top plate (54) away from the inner center of the housing (1).

3. A photovoltaic power station grid-connected reactive power compensation control device according to claim 1, characterized in that: It also includes an adjustment plate (6), a fixing rod (7) and a push plate (8), wherein the adjustment plate (6) is slidably connected to the front wall of the mounting groove (4), the fixing rods (7) are arranged on the left and right sides of the rear end of the adjustment plate (6), the push plates (8) are arranged at the rear end of the fixing rods (7), the middle part of the front end of the push plates (8) is provided with an adjustment groove, and the adjustment rods (56) are respectively located inside the vertically adjacent adjustment grooves.

4. A photovoltaic power station grid-connected reactive power compensation control device according to claim 3, characterized in that: It also includes a screw rod (9), which is rotatably connected to the front side of the top wall of the mounting groove (4) through a bearing, and the screw rod (9) is threadedly connected to a threaded hole provided in the middle of the upper end of the adjustment plate (6).

5. A photovoltaic power station grid-connected reactive power compensation control device according to claim 4, characterized in that: It also includes a servo motor (10), the servo motor (10) being arranged on the front side of the bottom wall of the installation groove (4), the upper end of the output shaft of the servo motor (10) being fixedly connected to the lower end of the screw rod (9), and the input end of the servo motor (10) being electrically connected to the output end of the single chip computer (2).

6. A photovoltaic power station grid-connected reactive power compensation control device according to claim 1, characterized in that: It also comprises a filter screen (11), wherein the filter screen (11) is respectively arranged in ventilation openings opened on the front sides of the left and right ends of the housing (1).

7. A photovoltaic power station grid-connected reactive power compensation control device according to claim 1, characterized in that: It also comprises a wire hole protection sleeve (12), wherein the wire hole protection sleeve (12) is respectively arranged in a wire through hole opened on the front side of the upper end of the housing (1).

Images