Integrated low-voltage reactive compensation controller for smart power grid

Abstract

The invention relates to the technical field of intelligent power grid power supply equipment, in particular to an integrated low-voltage reactive compensation controller for an intelligent power grid, which comprises a cabinet, a compensation structure, a mounting structure, a walking structure, a discharging structure and a grounding quick release structure, the zero line grounding column on the compensation capacitor is quickly separated from the galvanized flat steel through the grounding quick-release structure, so that the compensation capacitor is conveniently and independently detached and replaced, and the detaching difficulty of the single compensation capacitor is reduced; the compensation structure can automatically calculate the power factor of the line according to the collected current and voltage signals, and can automatically select the number and capacity of input capacitors according to the expected power factor, thereby achieving the effect of intelligent automatic capacitance compensation. The compensation capacitor is quickly mounted and dismounted through the mounting structure, and the mounting and dismounting efficiency of the compensation capacitor is improved; therefore, the compensation capacitor can be conveniently discharged, the safety of the discharging operation is improved, meanwhile, the leakage of discharging is avoided, and the discharging accuracy is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply equipment for smart grids, and more specifically to an integrated low-voltage reactive power compensation controller for smart grids. Background Art

[0002] A smart grid is a new type of power system formed by integrating information technology, communication technology, automation technology, and energy technology on the basis of a traditional power grid, with highly digital, automated, and interactive features. Its core goal is to achieve high efficiency, low carbon, and safety in power generation, transmission, distribution, and use, and to meet the needs of renewable energy access, distributed energy development, and user interaction. A low-voltage reactive power compensator is a common power supply device used in smart grids.

[0003] However, the compensation capacitors of existing reactive power compensators are usually connected to the zero-line grounding post and the grounding device (such as galvanized flat steel) through a fixed wiring method. When a single capacitor fails, the entire grounding line needs to be disassembled, resulting in low maintenance efficiency and complex operation. The controllers of existing reactive power compensators are difficult to dynamically adjust the number and capacity of the input compensation capacitors in real time according to grid parameters, with low power factor adjustment accuracy, and cannot meet the requirements of high efficiency and accuracy of reactive power compensation in smart grids. The fixing method of the compensation capacitors of existing reactive power compensators mostly uses bolt fastening. When installing and replacing, the screws need to be disassembled one by one, which is time-consuming and laborious and not suitable for large-scale and rapid maintenance. Summary of the Invention

[0004] In view of the problems in the prior art, the present invention provides an integrated low-voltage reactive power compensation controller for smart grids.

[0005] The technical solution adopted by the present invention to solve its technical problems is: an integrated low-voltage reactive power compensation controller for smart grids, including a cabinet, a compensation structure arranged inside the cabinet, a mounting structure arranged on the cabinet, a walking structure arranged on the compensation structure, a discharging structure arranged on the walking structure, and a grounding quick-release structure arranged on the compensation structure; the compensation structure includes a mounting rail, a contactor, a compensation capacitor, three-phase terminals, a zero-line grounding post, and a galvanized flat steel. A plurality of compensation capacitors are installed inside the cabinet through the mounting structure, and three-phase terminals and a zero-line grounding post are arranged on the compensation capacitor. The grounding quick-release structure includes a conductive rail and a conductive rack. A conductive rail is fixedly connected to the neutral grounding post. A slot is provided on the conductive rack, and the conductive rail is inserted into the slot. A perforation is provided on the conductive rack, and the same galvanized flat steel passes through the perforations of multiple conductive racks. Two guide rods are slidably connected to the neutral grounding post, and a pressing tooth is fixedly connected to the bottom ends of the two guide rods. The pressing tooth meshes with the conductive rack. A spring is sleeved outside the guide rod, and the two ends of the spring are respectively fixedly connected to the neutral grounding post and the pressing tooth.

[0006] Specifically, the cross-section of the conductive rail is a T-shaped structure, the cross-section of the slot is a T-shaped structure, and the cross-section of the conductive rack is a T-shaped structure.

[0007] Specifically, a plurality of mounting rails are fixedly connected inside the cabinet. A plurality of contactors and a plurality of circuit breakers are fixedly connected in a linear array on the mounting rails. An intelligent compensation controller is fixedly connected to the cabinet. The bus main power supply is connected to the circuit breaker through a wire. The circuit breaker is connected to the contactor through a wire. The contactor is connected to the three-phase terminals on the intelligent compensation capacitor through a wire. Two of the three-phase power supplies of the bus main power supply are connected to the fuse switch. The fuse switch is connected to the intelligent compensation controller through a wire. Each output point of the intelligent compensation controller is connected to the automatic control points of a plurality of changeover switches through a wire. The output points of the changeover switches are short-circuited and connected to the contactor. The current transformer signal of the bus current is connected to the intelligent compensation controller through a wire.

[0008] Specifically, a plurality of connecting blocks are fixedly connected to the mounting rail where the contactor is installed, and a wire guiding rod for guiding the wire is fixedly connected to the connecting block.

[0009] Specifically, the mounting structure includes a mounting strip and a mounting groove. Two mounting strips are fixedly connected inside the cabinet. A plurality of mounting grooves are provided on the mounting strip, and a compensation capacitor is placed in the mounting groove. A plurality of groups of positioning posts are fixedly connected to the mounting strip. Four positioning holes are provided on the compensation capacitor, and the four positioning holes on the compensation capacitor are inserted into the four positioning posts of each group.

[0010] Specifically, a plurality of fixed sleeves are fixedly connected to each mounting strip. A sliding strip is slidably connected to the fixed sleeve. A driving strip is slidably connected to the sliding strip. A driving shaft is rotatably connected to the driving strip. An inclined driving groove is provided on the sliding strip, and the driving shaft is in rolling connection with the driving groove. A pressing strip is fixedly connected between two opposite driving strips. A fixed strip is fixedly connected to each mounting strip, and a guiding post is fixedly connected to the fixed strip. The driving strip is slidably connected to the guiding post. A sliding rod is fixedly connected to the sliding strip, and a connecting strip is fixedly connected to the sliding rod. A clamping strip is fixedly connected to the connecting strip, and the clamping strip is slidably connected to the mounting strip. A clamping sleeve is fixedly connected to each compensation capacitor, and the clamping strip is inserted into the clamping sleeve.

[0011] Specifically, a tension spring is sleeved outside the sliding rod, and two ends of the tension spring are fixedly connected to the fixed sleeve and the connecting bar respectively.

[0012] Specifically, the traveling structure includes a fixed block and a screw rod. Two fixed blocks are fixedly connected to the mounting rail. A screw rod is rotatably connected to the two fixed blocks. A sliding frame is threadedly connected to the screw rod. A first motor is fixedly connected to the fixed block, and an output end of the first motor is fixedly connected to the screw rod. A guiding shaft is fixedly connected between the two fixed blocks. The sliding frame is slidably connected to the guiding shaft. A rotating shaft is rotatably connected to the sliding frame. A rotating plate is fixedly connected to the rotating shaft. A second motor is fixedly connected to the sliding frame, and an output end of the second motor is fixedly connected to the rotating shaft. A rotating plate is fixedly connected to the rotating shaft. A mounting plate is slidably connected to the rotating plate.

[0013] Specifically, a discharging structure is provided on the mounting plate. The discharging structure includes a lamp holder and a tungsten filament lamp. The lamp holder is fixedly connected to the mounting plate, and the tungsten filament lamp is installed on the lamp holder. Two conductance sheets are fixedly connected to the mounting plate, and one of the conductance sheets is inclined. Two conductance columns are fixedly connected to each conductance sheet. Two electric wires are fixedly connected to the lamp holder, and the two electric wires are respectively fixedly connected to the two conductance sheets. The distance between the two conductance columns on one side of one group of cylinders is twice the distance between the two conductance columns on the same side of the other group.

[0014] Specifically, a hydraulic rod is fixedly connected to the rotating plate, and a fixed seat is fixedly connected to the mounting plate. A telescopic end of the hydraulic rod is fixedly connected to the fixed seat.

[0015] The beneficial effects of the present invention are as follows: (1) For an integrated low-voltage reactive power compensation controller for a smart grid according to the present invention, a compensation structure is provided inside the cabinet, and a grounding quick-release structure is provided on the compensation structure. The zero-line grounding column on the compensation capacitor is quickly separated from the galvanized flat steel through the grounding quick-release structure, thereby facilitating the separate disassembly and replacement of the compensation capacitor and reducing the disassembly difficulty of a single compensation capacitor.

[0016] (2) For an integrated low-voltage reactive power compensation controller for a smart grid according to the present invention, the compensation structure can automatically calculate the power factor of the line according to the collected current and voltage signals, and can automatically select the number and capacity of the capacitors to be put into use according to the expected power factor, achieving the effect of intelligent automatic capacitor compensation.

[0017] (3) For an integrated low-voltage reactive power compensation controller for a smart grid according to the present invention, a mounting structure is provided on the cabinet, and the compensation capacitor can be quickly installed and disassembled through the mounting structure, improving the installation and disassembly efficiency of the compensation capacitor.

[0018] (4) In the integrated low-voltage reactive power compensation controller for smart grid of the present invention, a walking structure is provided on the compensation structure, and a discharging structure is provided on the walking structure, which facilitates the discharging operation of the compensation capacitor, improves the safety of the discharging operation, and at the same time will not miss discharging, improving the discharging accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the drawings and embodiments.

[0020] Figure 1 It is a schematic diagram of the overall structure of a preferred embodiment of the integrated low-voltage reactive power compensation controller for smart grid provided by the present invention; Figure 2 For Figure 1 The enlarged schematic diagram of the structure of part A shown; Figure 3 It is a schematic diagram of the connection structure between the mounting rail and the fuse switch of the present invention; Figure 4 For Figure 2 The enlarged schematic diagram of the structure of part B shown; Figure 5 For Figure 4 The enlarged schematic diagram of the structure of part C shown; Figure 6 It is a schematic diagram of the connection structure between the mounting strip and the compensation capacitor of the present invention; Figure 7 For Figure 6 The enlarged schematic diagram of the structure of part D shown; Figure 8 It is a schematic diagram of the connection structure between the mounting strip and the mounting groove of the present invention; Figure 9 For Figure 8 The enlarged schematic diagram of the structure of part E shown; Figure 10 It is a schematic diagram of the connection structure between the carriage and the rotating plate of the present invention; Figure 11 It is a schematic diagram of the connection structure between the mounting plate and the conductance column of the present invention.

[0021] In the figure: 1, cabinet; 2, compensation structure; 201, mounting rail; 202, contactor; 203, circuit breaker; 204, fuse switch; 205, intelligent compensation controller; 206, compensation capacitor; 207, three-phase terminal; 208, zero-line grounding post; 209, connection block; 210, wire rod; 211, galvanized flat steel; 212, change-over switch; 3, mounting structure; 301, mounting strip; 302, mounting groove; 303, positioning post; 304, positioning hole; 305, fixing sleeve; 306, sliding strip; 307, driving strip; 308, driving shaft; 309, driving groove; 310, fixing strip; 311, guiding post; 312, pressing strip; 313, sliding rod; 314, connecting strip; 315, clamping strip; 316, clamping sleeve; 317, tension spring; 4, traveling structure; 401, fixing block; 402, screw; 403, first motor; 404, sliding frame; 405, guiding shaft; 406, rotating shaft; 407, rotating plate; 408, second motor; 409, mounting plate; 5, discharging structure; 501, lamp holder; 502, tungsten filament lamp; 503, conductance column; 504, conductance sheet; 505, hydraulic rod; 506, fixing seat; 507, electric wire; 6, grounding quick-release structure; 601, conductive rail; 602, conductive rack; 603, slot; 604, perforation; 605, guiding rod; 606, pressing tooth; 607, spring. Detailed implementation mode

[0022] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with the specific implementation mode.

[0023] As Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 8 shown, an integrated low-voltage reactive power compensation controller for an intelligent power grid according to the present invention includes a cabinet 1, a compensation structure 2 provided inside the cabinet 1, a mounting structure 3 provided on the cabinet 1, a traveling structure 4 provided on the compensation structure 2, a discharging structure 5 provided on the traveling structure 4, and a grounding quick-release structure 6 provided on the compensation structure 2; the compensation structure 2 includes a mounting rail 201, a contactor 202, a compensation capacitor 206, a three-phase terminal 207, a zero-line grounding post 208 and a galvanized flat steel 211, and a plurality of compensation capacitors 206 are installed inside the cabinet 1 through the mounting structure 3, and a three-phase terminal 207 and a zero-line grounding post 208 are provided on the compensation capacitor 206; The grounding quick-release structure 6 includes a conductive rail 601 and a conductive rack 602. The conductive rail 601 is fixedly connected to the neutral grounding post 208. A slot 603 is provided on the conductive rack 602, and the conductive rail 601 is inserted into the slot 603. A perforation 604 is provided on the conductive rack 602, and the same galvanized flat steel 211 passes through the perforations 604 of multiple conductive racks 602. Two guide rods 605 are slidably connected to the neutral grounding post 208. A pressing tooth 606 is fixedly connected to the bottom ends of the two guide rods 605. The pressing tooth 606 meshes with the conductive rack 602. A spring 607 is sleeved outside the guide rod 605, and the two ends of the spring 607 are respectively fixedly connected to the neutral grounding post 208 and the pressing tooth 606. When it is necessary to quickly separate the neutral grounding post 208 on the compensation capacitor 206 from the galvanized flat steel 211, only need to pull the conductive rack 602 forcefully. The conductive rack 602 abuts against the pressing tooth 606 and rises, and the spring 607 is compressed. After the slot 603 on the conductive rack 602 is separated from the conductive rail 601, the compensation capacitor 206 can be disassembled separately, improving the convenience of maintenance and replacement of the compensation capacitor 206; the cross-section of the conductive rail 601 is a T-shaped structure, the cross-section of the slot 603 is a T-shaped structure, and the cross-section of the conductive rack 602 is a T-shaped structure; the compensation capacitor 206 is connected in series to the ground through the neutral grounding post 208 and the galvanized flat steel 211 to ensure the stability of the system potential, balance the three-phase current, and reduce the neutral line current loss. During normal operation, the conductive rail 601 and the conductive rack 602 are tightly inserted through the T-shaped slot 603, and the pressing tooth 606 is locked under the action of the spring 607 to ensure the grounding reliability.

[0024] Specifically, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 8As shown, a plurality of mounting rails 201 are fixedly connected inside the cabinet 1. A plurality of contactors 202 and a plurality of circuit breakers 203 are fixedly connected in a linear array on the mounting rails 201. An intelligent compensation controller 205 is fixedly connected to the cabinet 1. The bus main power supply is connected to the circuit breaker 203 through a wire. The circuit breaker 203 is connected to the contactor 202 through a wire. The contactor 202 is connected to the three-phase terminals 207 on the intelligent compensation capacitor 206 through a wire. Two of the power supplies of the bus main power supply are connected to the fuse switch 204. The fuse switch 204 is connected to the intelligent compensation controller 205 through a wire. When the grid current exceeds the rated value, the circuit breaker 203 automatically trips to cut off the main power supply, avoiding the compensation capacitor 206 or the line from being burned out due to overload. The fuse switch 204 monitors the current of the control loop. If the intelligent compensation controller 205 fails, the fuse switch 204 melts to isolate the fault point. If a single compensation capacitor 206 breaks down or leaks electricity, the intelligent compensation controller 205 identifies the fault through the current mutation signal and automatically cuts off the corresponding contactor 202 to isolate the faulty capacitor without affecting the normal operation of other capacitors. The line main power supply is connected to the contactor 202 through the circuit breaker 203 and then connected to the three-phase terminals 207 of the compensation capacitor 206 through a wire to form the main power supply loop. Two of the power supplies of the bus main power supply are connected to the intelligent compensation controller 205 through the fuse switch 204 to provide the working power supply for it. Each output point of the intelligent compensation controller 205 is connected to the automatic control points of a plurality of changeover switches 212 through a wire. The output points of the changeover switch 212 are short-circuited and connected to the contactor 202. The output points of the intelligent compensation controller 205 are connected to the changeover switch 212 through a wire to control the operation of the contactor 202. The compensation capacitor 206 is connected to the galvanized flat steel 211 in series through the zero-line grounding post 208 to ensure the stability of the system potential. The mutual inductor signal of the bus current is connected to the intelligent compensation controller 205 through a wire. The mutual inductor signal of the bus current is connected to the intelligent compensation controller 205 to real-time feedback the grid current data. A plurality of connection blocks 209 are fixedly connected to the mounting rails 201 where the contactors 202 are installed. A wire guiding rod 210 for guiding the wire is fixedly connected to the connection block 209.

[0025] Specifically, as Figure 3 、 Figure 6 、 Figure 7 、 Figure 8 and Figure 9As shown in the figure, the installation structure 3 includes an installation strip 301 and an installation groove 302. Two installation strips 301 are fixedly connected inside the cabinet 1. Multiple installation grooves 302 are provided on the installation strip 301. A compensation capacitor 206 is placed in the installation groove 302. Multiple groups of positioning columns 303 are fixedly connected to the installation strip 301. Four positioning holes 304 are provided on the compensation capacitor 206. The four positioning holes 304 on the compensation capacitor 206 are inserted into the four positioning columns 303 of each group; A plurality of fixing sleeves 305 are fixedly connected to each installation strip 301. A sliding strip 306 is slidably connected to the fixing sleeve 305. A driving strip 307 is slidably connected to the sliding strip 306. A driving shaft 308 is rotatably connected to the driving strip 307. An inclined driving groove 309 is provided on the sliding strip 306. The driving shaft 308 is in rolling connection with the driving groove 309. A pressing strip 312 is fixedly connected between two opposite driving strips 307. A fixing strip 310 is fixedly connected to each installation strip 301. A guiding column 311 is fixedly connected to the fixing strip 310. The driving strip 307 is slidably connected to the guiding column 311. The arrangement of the fixing strip 310 and the guiding column 311 improves the sliding stability of the driving strip 307. A sliding rod 313 is fixedly connected to the sliding strip 306. A connecting strip 314 is fixedly connected to the sliding rod 313. A clamping strip 315 is fixedly connected to the connecting strip 314. The clamping strip 315 is slidably connected to the installation strip 301. A clamping sleeve 316 is fixedly connected to each compensation capacitor 206. The clamping strip 315 is inserted into the clamping sleeve 316. The compensation capacitor 206 is placed into the installation groove 302 of the installation strip 301, so that the positioning holes 304 on the compensation capacitor 206 are inserted into the positioning columns 303 on the installation strip 301 to complete the preliminary positioning. At the same time, since the bottom end of the clamping sleeve 316 abuts against the clamping strip 315 with a trapezoidal end cross-section, the clamping strip 315 slides and drives the connecting strip 314 to slide, and the tension spring 317 stretches. When the compensation capacitor 206 is completely installed, the tension spring 317 resets, driving the connecting strip 314 and the clamping strip 315 to slide, and the clamping strip 315 is engaged with the clamping sleeve 316, thus completely fixing the compensation capacitor 206. When the compensation capacitor 206 needs to be disassembled, the pressing strip 312 can be pressed with the back of the hand. The pressing strip 312 drives the driving strip 307 to slide downward. The driving strip 307 slides downward and drives the driving shaft 308 to move downward. Since the driving shaft 308 is in rolling connection with the inclined driving groove 309, when the driving strip 307 moves downward, it will drive the two sliding strips 306 to move away from each other, driving the sliding rod 313, the connecting strip 314 and the clamping strip 315 to slide. The clamping strip 315 is no longer engaged with the clamping sleeve 316 on the compensation capacitor 206. At this time, the fingers can be hooked into the bottom end of the compensation capacitor 206, and then the compensation capacitor 206 can be lifted with both hands to disassemble the compensation capacitor 206; A tension spring 317 is sleeved outside the sliding rod 313. The two ends of the tension spring 317 are respectively fixedly connected to the fixing sleeve 305 and the connecting strip 314.

[0026] Specifically, as Figure 1 , Figure 2 , Figure 4 , Figure 10 and Figure 11 shown, the traveling structure 4 includes a fixed block 401 and a screw 402. Two fixed blocks 401 are fixedly connected to the mounting rail 201. A screw 402 is rotatably connected to the two fixed blocks 401. A carriage 404 is threadedly connected to the screw 402. A first motor 403 is fixedly connected to the fixed block 401. The output end of the first motor 403 is fixedly connected to the screw 402. A guide shaft 405 is fixedly connected between the two fixed blocks 401. The carriage 404 is slidably connected to the guide shaft 405. When it is necessary to repair and replace the compensation capacitor 206, it is necessary to first switch the transfer switch 212 to manually switch all capacitor banks, and then detect the compensation capacitor 206 and electrical components through the current transformer. After the detection is completed, turn off the control power supply, and then turn off all circuit breakers 203. Wait for the capacitor bank to discharge by itself for a period of time, and then secondary discharge is required. During the discharge, the first motor 403 drives the screw 402 to rotate, driving the carriage 404 to move along the guide shaft 405 to the target capacitor position. A rotating shaft 406 is rotatably connected to the carriage 404. A rotating plate 407 is fixedly connected to the rotating shaft 406. A second motor 408 is fixedly connected to the carriage 404. The output end of the second motor 408 is fixedly connected to the rotating shaft 406. The rotating shaft 406 is fixedly connected to the rotating plate 407. A mounting plate 409 is slidably connected to the rotating plate 407. The second motor 408 drives the rotating shaft 406 to rotate, adjusting the angle of the rotating plate 407 so that the discharge structure 5 is aligned with the three-phase terminals 207 of the capacitor; The mounting plate 409 is provided with a discharge structure 5. The discharge structure 5 includes a lamp holder 501 and a tungsten filament bulb 502. The lamp holder 501 is fixedly connected to the mounting plate 409, and the tungsten filament bulb 502 is installed on the lamp holder 501. Two conductive sheets 504 are fixedly connected to the mounting plate 409, and one of the conductive sheets 504 is inclined. Two conductive columns 503 are fixedly connected to each conductive sheet 504. Two electric wires 507 are fixedly connected to the lamp holder 501, and the two electric wires 507 are respectively fixedly connected to the two conductive sheets 504. The distance between the two conductive columns 503 on one set of cylinder sides is twice the distance between the two conductive columns 503 on the other set of the same side; A hydraulic rod 505 is fixedly connected to the rotating plate 407, and a fixed seat 506 is fixedly connected to the mounting plate 409. The telescopic end of the hydraulic rod 505 is fixedly connected to the fixed seat 506. The hydraulic rod 505 pushes the mounting plate 409 close to the capacitor, and the conductive columns 503 contact the three-phase terminals 207. The tungsten filament bulb 502 forms a discharge circuit through the electric wires 507 and the conductive sheets 504, and the residual charge of the capacitor is consumed by the bulb resistance. The two conductive columns 503 with a relatively close distance on the same side are used for contact conduction with the first and second phase terminals or the second and third phase terminals, and the two conductive columns 503 with a relatively far distance on the same side are used for contact conduction between the first and third phase terminals, so as to completely discharge the residual charge of the capacitor.

[0027] When the present invention is in use, first, the compensation capacitor 206 is placed into the installation groove 302 of the installation strip 301, so that the positioning holes 304 on the compensation capacitor 206 are inserted into the positioning columns 303 on the installation strip 301 to complete preliminary positioning. At the same time, since the bottom end of the ferrule 316 abuts against the strip 315 with a trapezoidal end cross-section, the strip 315 slides and drives the connecting strip 314 to slide, and the tension spring 317 stretches. When the compensation capacitor 206 is completely installed, the tension spring 317 resets, driving the connecting strip 314 and the strip 315 to slide, and the strip 315 engages with the ferrule 316, thus completely fixing the compensation capacitor 206. When the compensation capacitor 206 needs to be disassembled, the pressing strip 312 can be pressed with the back of the hand. The pressing strip 312 drives the driving strip 307 to slide downward. The driving strip 307 slides downward and drives the driving shaft 308 to move downward. Since the driving shaft 308 is in rolling connection with the inclined driving groove 309, when the driving strip 307 moves downward, it will drive the two sliding strips 306 to move away from each other, driving the sliding rod 313, the connecting strip 314 and the strip 315 to slide. The strip 315 no longer engages with the ferrule 316 on the compensation capacitor 206. At this time, the fingers can be inserted into the bottom end of the compensation capacitor 206, and then the compensation capacitor 206 can be lifted with both hands to disassemble the compensation capacitor 206. The setting of the fixing strip 310 and the guiding column 311 improves the sliding stability of the driving strip 307; Then, the bus main power supply is connected to the contactor 202 through the circuit breaker 203, and then connected to the three-phase terminal 207 of the compensation capacitor 206 through the wire to form a main power supply circuit. The two-phase power supply of the bus main power supply is connected to the intelligent compensation controller 205 through the fuse 204 to provide it with working power. The transformer signal of the bus current is connected to the intelligent compensation controller 205 to feed back the grid current data in real time; the output point of the intelligent compensation controller 205 is connected to the conversion switch 212 through the wire to control the action of the contactor 202, and the compensation capacitor 206 is connected to the galvanized flat steel 211 in series with the neutral grounding column 208 to ensure the stability of the system potential, balance the three-phase current, and reduce the neutral current loss. During normal operation, the conductive rail 60 1 is tightly plugged with the conductive rack 602 through the T-shaped slot 603, and the pressure tooth 606 is locked and connected under the action of the spring 607 to ensure grounding reliability; it can be quickly disconnected during maintenance without affecting the operation of other capacitors. When the grid current exceeds the rated value, the circuit breaker 203 automatically trips and cuts off the main power supply to avoid the compensation capacitor 206 or the line from being overloaded and burned. The safety switch 204 monitors the control loop current. If the intelligent compensation controller 205 fails, the safety switch 204 fuses and isolates the fault point. If a single compensation capacitor 206 breaks down or leaks, the intelligent compensation controller 205 identifies the fault through the current mutation signal and automatically cuts off the corresponding contactor 202 to isolate the faulty capacitor without affecting the normal operation of other capacitors; Secondly, when it is necessary to quickly release the neutral grounding column 208 on the compensation capacitor 206 and quickly separate the galvanized flat steel 211, it is only necessary to pull the conductive rack 602 with force, the conductive rack 602 rises against the pressing tooth 606, the spring 607 is compressed, and the slot 603 on the conductive rack 602 is separated from the conductive rail 601, and then the separate compensation capacitor 206 can be disassembled, which improves the convenience of maintenance and replacement of the compensation capacitor 206; Finally, when it is necessary to repair and replace the compensation capacitor 206, the change-over switch 212 needs to be switched to manually switch all capacitor banks first, and then the compensation capacitor 206 and electrical components are detected through the current transformer. After the detection is completed, the control power supply is turned off, and then all the circuit breakers 203 are turned off. After waiting for the capacitor bank to discharge by itself for a period of time, secondary discharge is required. During the discharge, the first motor 403 drives the screw 402 to rotate, driving the carriage 404 to move along the guide shaft 405 to the target capacitor position; the second motor 408 drives the rotating shaft 406 to rotate, adjusting the angle of the rotating plate 407 to align the discharge structure 5 with the three-phase terminals 207 of the capacitor. The hydraulic rod 505 pushes the mounting plate 409 close to the capacitor, the conductance column 503 contacts the three-phase terminals 207, and the tungsten filament lamp 502 forms a discharge circuit through the electric wire 507 and the conductance sheet 504, using the lamp resistance to consume the residual charge of the capacitor. The two conductance columns 503 that are closer to each other on the same side are used for contacting and conducting electricity with the first and second phase terminals or the second and third phase terminals, and the two conductance columns 503 that are farther apart on the same side are used for contacting and conducting electricity with the first and third phase terminals, so as to completely discharge the residual charge of the capacitor.

[0028] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be construed as limiting the claimed invention.

[0029] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An integrated low-voltage reactive power compensation controller for a smart grid, characterized in that, It includes a cabinet (1), a compensation structure (2) arranged inside the cabinet (1), a mounting structure (3) arranged on the cabinet (1), a traveling structure (4) arranged on the compensation structure (2), a discharge structure (5) arranged on the traveling structure (4), and a grounding quick-release structure (6) arranged on the compensation structure (2); The compensation structure (2) includes a mounting rail (201), a contactor (202), a compensation capacitor (206), a three-phase terminal (207), a neutral grounding post (208), and a galvanized flat steel (211). A plurality of compensation capacitors (206) are installed inside the cabinet (1) through the mounting structure (3), and a three-phase terminal (207) and a neutral grounding post (208) are arranged on the compensation capacitor (206); The grounding quick-release structure (6) includes a conductive rail (601) and a conductive rack (602). A conductive rail (601) is fixedly connected to the neutral grounding post (208). A slot (603) is arranged on the conductive rack (602), and the conductive rail (601) is inserted into the slot (603). A perforation (604) is arranged on the conductive rack (602), and the same galvanized flat steel (211) passes through the perforations (604) of a plurality of the conductive racks (602). Two guide rods (605) are slidably connected to the neutral grounding post (208), and a pressing tooth (606) is fixedly connected to the bottom ends of the two guide rods (605). The pressing tooth (606) meshes with the conductive rack (602). A spring (607) is sleeved outside the guide rod (605), and the two ends of the spring (607) are respectively fixedly connected to the neutral grounding post (208) and the pressing tooth (606).

2. The integrated low-voltage reactive power compensation controller for a smart grid according to claim 1, characterized in that: The cross-section of the conductive rail (601) is a T-shaped structure, the cross-section of the slot (603) is a T-shaped structure, and the cross-section of the conductive rack (602) is a T-shaped structure.

3. The integrated low-voltage reactive power compensation controller for a smart grid according to claim 2, wherein: A plurality of mounting rails (201) are fixedly connected inside the cabinet (1), and a plurality of contactors (202) and a plurality of circuit breakers (203) are fixedly connected in a linear array on the mounting rail (201). An intelligent compensation controller (205) is fixedly connected to the cabinet (1). The bus main power supply is connected to the circuit breaker (203) through a wire, the circuit breaker (203) is connected to the contactor (202) through a wire, the contactor (202) is connected to the three-phase terminal (207) on the intelligent compensation capacitor (206) through a wire. Two phases of the bus main power supply are connected to an insurance switch (204), the insurance switch (204) is connected to the intelligent compensation controller (205) through a wire. Each output point of the intelligent compensation controller (205) is connected to the automatic control point of a plurality of change-over switches (212) through a wire. The output points of the change-over switches (212) are short-circuited and connected to the contactor (202). The current transformer signal of the bus is connected to the intelligent compensation controller (205) through a wire.

4. An integrated low-voltage reactive power compensation controller for a smart grid according to claim 3, characterized in that: A plurality of connection blocks (209) are fixedly connected to the installation rail (201) for installing the contactor (202), and a wire guiding rod (210) for guiding wires is fixedly connected to the connection block (209).

5. An integrated low-voltage reactive power compensation controller for a smart grid according to claim 4, characterized in that: The installation structure (3) includes an installation strip (301) and an installation groove (302). Two installation strips (301) are fixedly connected to the inside of the cabinet (1). A plurality of installation grooves (302) are provided on the installation strip (301). A compensation capacitor (206) is placed in the installation groove (302). A plurality of groups of positioning columns (303) are fixedly connected to the installation strip (301). Four positioning holes (304) are provided on the compensation capacitor (206). The four positioning holes (304) on the compensation capacitor (206) are inserted into the four positioning columns (303) of each group.

6. An integrated low-voltage reactive power compensation controller for a smart grid according to claim 5, characterized in that: A plurality of fixing sleeves (305) are fixedly connected to each installation strip (301). A slide bar (306) is slidably connected to the fixing sleeve (305). A driving bar (307) is slidably connected to the slide bar (306). A driving shaft (308) is rotatably connected to the driving bar (307). An inclined driving groove (309) is provided on the slide bar (306). The driving shaft (308) is in rolling connection with the driving groove (309). A pressing bar (312) is fixedly connected between two opposite driving bars (307). A fixing bar (310) is fixedly connected to each installation strip (301). A guiding column (311) is fixedly connected to the fixing bar (310). The driving bar (307) is slidably connected to the guiding column (311). A slide rod (313) is fixedly connected to the slide bar (306). A connecting bar (314) is fixedly connected to the slide rod (313). A clamping bar (315) is fixedly connected to the connecting bar (314). The clamping bar (315) is slidably connected to the installation strip (301). A clamping sleeve (316) is fixedly connected to each compensation capacitor (206). The clamping bar (315) is inserted into the clamping sleeve (316).

7. An integrated low-voltage reactive power compensation controller for a smart grid according to claim 6, characterized in that: A tension spring (317) is sleeved outside the slide rod (313), and the two ends of the tension spring (317) are respectively fixedly connected to the fixing sleeve (305) and the connecting bar (314).

8. An integrated low-voltage reactive power compensation controller for a smart grid according to claim 1, characterized in that: The walking structure (4) includes a fixed block (401) and a screw rod (402). Two fixed blocks (401) are fixedly connected to the mounting rail (201). A screw rod (402) is rotatably connected between the two fixed blocks (401). A carriage (404) is threadedly connected to the screw rod (402). A first motor (403) is fixedly connected to the fixed block (401). The output end of the first motor (403) is fixedly connected to the screw rod (402). A guide shaft (405) is fixedly connected between the two fixed blocks (401). The carriage (404) is slidably connected to the guide shaft (405). A rotating shaft (406) is rotatably connected to the carriage (404). A rotating plate (407) is fixedly connected to the rotating shaft (406). A second motor (408) is fixedly connected to the carriage (404). The output end of the second motor (408) is fixedly connected to the rotating shaft (406). A rotating plate (407) is fixedly connected to the rotating shaft (406). A mounting plate (409) is slidably connected to the rotating plate (407).

9. An integrated low-voltage reactive power compensation controller for a smart grid according to claim 8, characterized in that: A discharge structure (5) is provided on the mounting plate (409). The discharge structure (5) includes a lamp holder (501) and a tungsten filament lamp (502). A lamp holder (501) is fixedly connected to the mounting plate (409). A tungsten filament lamp (502) is installed on the lamp holder (501). Two conductance sheets (504) are fixedly connected to the mounting plate (409). One of the conductance sheets (504) is inclined. Two conductance columns (503) are fixedly connected to each conductance sheet (504). Two electric wires (507) are fixedly connected to the lamp holder (501). The two electric wires (507) are respectively fixedly connected to the two conductance sheets (504). The distance between the two conductance columns (503) on one side of one group of cylinders is twice the distance between the two conductance columns (503) on the same side of the other group.

10. An integrated low-voltage reactive power compensation controller for a smart grid according to claim 9, characterized in that: A hydraulic rod (505) is fixedly connected to the rotating plate (407). A fixed seat (506) is fixedly connected to the mounting plate (409). The telescopic end of the hydraulic rod (505) is fixedly connected to the fixed seat (506).

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