Active power filter cabinet convenient for placing modules

Abstract

The invention discloses an active filtering cabinet convenient to place modules, and relates to the technical field of active filtering equipment, the active filtering cabinet convenient to place modules comprises a cabinet body and a door frame, the cabinet body is provided with five layers, the bottom layer is a power supply bin, the four layers are module bins, the four layers are the same in structure, and the layers are separated by fixing plates; a connecting rod assembly is arranged at the end, close to the opening side, of the filtering assembly, the frame assembly is connected behind the connecting rod assembly, a power source and a power adapter are arranged in the power source bin, a plurality of electric wire through holes are formed in one side of the fixing plate, and electric wire pulleys are arranged at the tops of the electric wire through holes. The wire pulley is fixed on the inner wall of the cabinet body, and the rear side of the cabinet body is fixedly provided with a touch display. Through the connecting rod assembly and the filtering assembly, the real-time monitoring and dynamic compensation capability of the load condition is improved, the installation, disassembly and maintenance processes of the module are simplified, and the manual operation intensity and the error rate are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of active filtering equipment, in particular to an active filtering cabinet facilitating module placement. BACKGROUND

[0002] As an important device for suppressing harmonics and improving power quality in power systems, the active filtering cabinet is widely used in industrial, commercial and civil fields. The traditional active filtering cabinet usually adopts a fixed cabinet structure. For example, the installation of nonlinear load modules such as variable frequency drives, frequency converters, inverters and variable frequency air conditioners needs to rely on manual operation. There are many inconveniences in the process of placing, disassembling and maintaining the modules.

[0003] The filtering function of the traditional filtering cabinet is relatively single. The core function of the traditional active filtering cabinet is limited to basic harmonic detection, and it passively eliminates harmonics based on preset parameters. They lack the ability to continuously and deeply monitor the load conditions and cannot provide intuitive system status information such as harmonic spectrum, compensation effect, device temperature, etc. in real time. At the same time, its control logic is relatively fixed, has poor expandability, is difficult to seamlessly integrate other intelligent functions, lacks real-time monitoring and dynamic compensation ability for load conditions, and is difficult to adapt to complex and variable power grid environments.

[0004] The module compartment of the existing filtering cabinet is designed in an open or semi-open manner. The internal space of the cabinet body is limited and the circuit is complex. Moreover, the modules are often fixedly installed at a deep position. The operation process is time-consuming and laborious, there is a risk of bumping, and the efficiency is low. Especially when high-density installation or multi-layer layout is required, the worker needs to bend over or use tools to accurately insert the module into the fixed position, which is low in operation efficiency and prone to problems such as poor contact due to human error. SUMMARY

[0005] The present application provides an active filtering cabinet facilitating module placement.

[0006] An active filtering cabinet facilitating module placement, comprising: a cabinet body and a door frame, the cabinet body is provided with five layers, the bottom layer is a power supply compartment, and the other four layers are module compartments, the four module compartments are of the same structure, and a fixed plate is arranged between each layer to separate them, the fixed plate is provided with a guide rail groove one and a guide rail groove two, a filter assembly is arranged on the guide rail grooves, the filter assembly is provided with a connecting rod assembly close to one end of the opening side, the connecting rod assembly is fixedly connected with a frame body assembly at the rear, a power supply and a power adapter are fixedly arranged on the bottom plate of the power supply compartment, a plurality of wire through holes are arranged on the side of the fixed plate away from the opening, a wire pulley is arranged at the top of the wire through hole, the wire pulley is fixed to the inner wall of the cabinet body, and a touch display is fixedly arranged at the rear side of the cabinet body. The filter assembly is fixedly provided with double-rod air cylinders on the top and the front and rear sides, the telescopic rods of the double-rod air cylinders are fixedly connected with the connecting rod assembly, a plurality of linear motors are inlaid on one side of the fixed plate away from the opening, and the permanent magnets on the linear motors are fixedly connected with the bottom of the filter assembly. The cabinet body is hinged with the door frame, the wire pulley is used for winding the wire around the pulley, the filter assembly is used for continuously monitoring the load condition of the access module and actively injecting the required compensation current to eliminate harmonic pollution, and the connecting rod assembly is used for automatically extending the frame assembly out of the cabinet body.

[0007] Preferably, the filter assembly comprises a box body, a protrusion is arranged at the center of the bottom of the box body and is in sliding fit with the guide rail groove, a host and an active filter are fixedly arranged in the box body, a power supply interface and a filter connection end are arranged on the host, a CT connection module is arranged at one end of the host close to the opening, a reactor and a current transformer are arranged in the host, the host is used for monitoring the load condition, driving the active filter to generate compensation current, and displaying the load condition on the touch display; A power supply port one, a power supply port two and an inverter output port are arranged on the surface of the CT connection module away from the opening, a filter terminal is arranged on the top of the CT connection module, and the filter terminal is sequentially arranged as a voltage sampling end, a load current detection end and a compensation current injection end; the voltage sampling end is connected with the power supply port one, and is used for leading the module voltage signal into the host for sampling; the load current detection end is connected with the current transformer, the current transformer is connected with the power supply port two, the current transformer is used for inducing a small current signal and a voltage signal proportional to the load current, and the small current signal and the voltage signal are transmitted to the host for sampling through the power supply port two; the compensation current injection end is connected with the reactor, and the reactor is connected with the inverter output port; The active filter comprises a load end and an electricity connection end, the electricity connection end is connected with the filter connection end through a wire, the load end is divided into three ports, and the three ports are electrically connected with the filter terminal in correspondence; A double-rod air cylinder is arranged on the telescopic rod of the double-rod air cylinder, and the telescopic rod of the double-rod air cylinder is fixedly connected with the two side edges of the double-rod air cylinder.

[0008] Preferably, the connecting rod assembly comprises a cylinder, a connecting frame plate one and a connecting frame plate two, the bottom of the connecting frame plate one is provided with a protruding plate, the top of the connecting frame plate one is provided with a rotating shaft one, the rotating shaft one penetrates through the bottom sleeve of the cylinder, the rotating shaft one is movably connected with the cylinder, and the lower part of the connecting frame plate one is vertically and spacedly provided with a rotating shaft two and a rotating shaft three from top to bottom. The other end of the cylinder is provided with a fixed clamping plate, and the top of the telescopic rod of the cylinder is fixedly connected with the bottom of the fixed clamping plate. The upper part of the connecting frame plate two is vertically spaced and sequentially provided with rotating shaft four and rotating shaft six from top to bottom, the connecting rod one is arranged between the rotating shaft two and the rotating shaft four, and the connecting rod two is arranged between the rotating shaft three and the rotating shaft six, and the connecting rod and the rotating shaft are movably connected. The rotating shaft six is arranged on the connecting rod one in a penetrating manner, and the rotating shaft six is fixed on the fixed clamping plate in a penetrating manner, and the fixed clamping plate is movably connected with the connecting rod one, wherein the connecting rod one is parallel to the connecting rod two.

[0009] Preferably, the frame body assembly comprises: a frame body two, which is fixedly arranged between the two connecting frame plates two. The frame body two is provided with a protruding plate two on the bottom surface, and a plurality of fixed buckles are arranged on the upper surface of the frame body two, which are used for fixing the modules, a plurality of electrical interface plates are arranged on the inner wall of the frame body two away from the opening, and an output interface is arranged on the outer wall of the frame body two away from the opening, the output interface is connected with the power supply port one, the power supply port two and the inverter output port, and a plurality of heat dissipation through holes two are arranged on the front and rear sides of the frame body two.

[0010] Preferably, the power supply interface of each layer extends an electric wire, the electric wire is wound on an electric wire pulley, the electric wire on the electric wire pulley passes through an electric wire through hole and is connected with a power supply take-up device, and an output electric wire of the power supply take-up device is connected with a power supply. The take-up device is used for automatically paying out and taking back the electric wire when the filtering assembly moves.

[0011] Preferably, a guide groove one is arranged in the center of the fixed plate, and guide grooves two are arranged on the left and right sides of the fixed plate, and the guide grooves two are slidably matched with the protruding plate.

[0012] Preferably, a plurality of heat dissipation fans are fixedly arranged on the outer frame wall of the frame body away from the opening, and a plurality of heat dissipation through holes are arranged on the front and rear sides of the frame body.

[0013] Preferably, a heat dissipation through hole three is arranged on the lower layer of the door frame corresponding to the position of the power supply compartment, and a glass plate is arranged on the other four layers of the door frame corresponding to the positions.

[0014] Preferably, the second layer module compartment from top to bottom, the rear side plate is fixedly provided with a wiring port below the electric wire pulley corresponding to the wiring port, and the electric wire of the touch display is electrically connected with the host through the wiring port.

[0015] Compared with the prior art, the beneficial effects of the present application are: The filter assembly is internally integrated with a host, an active filter and a CT connection module, and has the ability of real-time monitoring of load conditions and active compensation: the host collects load current and voltage signals in real time through current transformers and voltage sampling terminals, drives the active filter to generate corresponding compensation current after analysis, and injects the compensation current into the power grid through a compensation current injection terminal to achieve dynamic elimination of harmonics. Compared with the traditional passive filtering method, the active compensation method can more accurately adapt to different load environments and improve the harmonic control effect. At the same time, the host displays the load conditions on the touch display at the rear side of the cabinet, which is convenient for workers to intuitively monitor the running state of the equipment and control the cylinder and linear motor through the automatic control function to realize intelligent management of the equipment.

[0016] The cabinet is provided with a five-layer structure, the bottom layer is a power supply compartment, the four-layer module compartments are separated by fixed plates, the guide groove one on each fixed plate cooperates with the guide groove two to form a precise sliding guide structure with the protruding block at the bottom of the filter assembly and the protruding plate of the connecting rod assembly. The filter assembly is driven by a double-rod cylinder and a linear motor, and can realize automatic expansion and contraction of the module compartment: the expansion rod of the double-rod cylinder is connected to the connecting rod assembly through a H-shaped frame, and cooperates with the linkage structure of the cylinder, the connecting frame plate and the connecting rod to drive the filter assembly to move along the guide groove when the module needs to be placed or replaced, and the connecting rod assembly is expanded and contracted at the same time, so that the frame assembly automatically extends outside the cabinet without manual bending or deep operation, which simplifies the installation, disassembly and maintenance process of the module, reduces the labor intensity and the failure rate.

[0017] In addition, the cooperation of the wire pulley and the power supply take-up device can automatically release or retract the wire when the filter assembly moves, avoiding wire entanglement or pulling, and further improving the stability and reliability of the equipment operation. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A perspective structural schematic diagram of an active filter cabinet convenient for placing modules according to an embodiment of the present disclosure is shown; Figure 2 A perspective structural schematic diagram of an active filter cabinet in a starting state according to an embodiment of the present disclosure is shown; Figure 3 A perspective structural schematic diagram of an active filter cabinet in a starting state according to an embodiment of the present disclosure is shown; Figure 4 A perspective structural schematic diagram of the rear side of an active filter cabinet convenient for placing modules according to an embodiment of the present disclosure is shown; Figure 5 A perspective structural schematic diagram of the filter assembly and the connecting rod assembly of an active filter cabinet convenient for placing modules according to an embodiment of the present disclosure is shown; Figure 6A perspective structural schematic diagram showing the start state of a filter assembly and a connecting rod assembly in a conveniently-placed module active filter cabinet according to an embodiment of the present disclosure is shown; Figure 7 A perspective structural schematic diagram showing a filter assembly, a connecting rod assembly and a frame assembly in a conveniently-placed module active filter cabinet according to an embodiment of the present disclosure is shown; Figure 8 A perspective structural schematic diagram showing a cabinet assembly in a conveniently-placed module active filter cabinet according to an embodiment of the present disclosure is shown; Figure 9 A perspective structural schematic diagram showing a connecting rod assembly in a conveniently-placed module active filter cabinet according to an embodiment of the present disclosure is shown; Figure 10 A perspective structural schematic diagram showing a filter assembly in a conveniently-placed module active filter cabinet according to an embodiment of the present disclosure is shown; Figure 11 A perspective structural schematic diagram showing a filter assembly in a conveniently-placed module active filter cabinet according to an embodiment of the present disclosure is shown.

[0019] Wherein: 1, cabinet; 1022, guide groove one; 1023, guide groove two; 1021, wire through hole; 2, door frame; 3, power supply; 4, filter assembly; 5, connecting rod assembly; 6, frame assembly; 7, linear motor; 8, touch display; 9, fixed plate; 101, heat dissipation through hole; 102, fixed plate; 103, heat dissipation fan; 104, wire pulley; 201, heat dissipation through hole three; 202, glass plate; 401, double-rod air cylinder; 402, CT connection module; 403, protrusion; 404, H-shaped frame; 405, filter terminal; 406, load end; 407, active filter; 408, power connection end; 409, filter connection end; 410, power supply interface; 411, host computer; 501, connection frame plate one; 502, protruding plate; 503, air cylinder; 504, connection frame plate two; 505, connecting rod one; 506, connecting rod two; 601, heat dissipation through hole two; 602, fixed buckle; 603, electrical interface plate; 604, protruding plate two; 605, output interface; 801, wiring port. DETAILED DESCRIPTION

[0020] Various exemplary embodiments, features, and aspects of the present disclosure will be explained in detail below with reference to the drawings. The same reference numbers in the drawings represent the same or similar elements or functions throughout the several aspects. Although various aspects of embodiments are illustrated in the drawings, the drawings are not necessarily drawn to scale unless specifically noted.

[0021] The term "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any implementation described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations.

[0022] In addition, for better illustration of the present disclosure, numerous specific details are given in the following detailed description. Those skilled in the art will understand that the present disclosure can be practiced without certain specific details. In some instances, well-known methods, means, elements and circuits have not been described in detail in order to avoid obscuring the present disclosure.

[0023] Referring to Figures 1-11 As shown in the drawings, the active filter cabinet of the present embodiment for conveniently placing the module comprises a cabinet body 1 and a door frame 2, and the cabinet body 1 is hinged to the door frame 2. The cabinet body 1 is provided with five layers, the bottom layer is a power supply compartment, and the other four layers are module compartments, the four module compartments are of the same structure, and a fixed plate 9 is arranged between each layer to separate them.

[0024] A power supply 3 and a power adapter are fixedly arranged on the bottom plate of the power supply compartment to provide power support for the entire device. The fixed plate 9 is provided with a guide groove one 1022 and a guide groove two 1023, the guide groove one 1022 is located in the center of the fixed plate 9, and the guide groove two 1023 is located on the left and right sides of the fixed plate 9. A filter assembly 4 is arranged on the guide groove, the filter assembly 4 is provided with a protruding block 403 in the center of the bottom, the protruding block 403 is in sliding fit with the guide groove one 1022, and the protruding plates 502 on the front and rear sides of the filter assembly 4 are in sliding fit with the guide groove two 1023, forming a precise sliding guide structure.

[0025] The filter assembly 4 is provided with a connecting rod assembly 5 close to one end of the opening side, and the connecting rod assembly 5 is fixedly connected with a frame assembly 6 behind. The filter assembly 4 is provided with double-rod air cylinders 401 on the top and the front and rear sides, the double-rod air cylinders 401 are provided with a H-shaped frame 404 on the telescopic rods, the telescopic rods of the double-rod air cylinders 401 are fixedly connected with the two side edges of the H-shaped frame 404, and the other side of each of the two side edges of the H-shaped frame 404 is provided with a connecting rod assembly 5. A plurality of linear motors 7 are embedded on the side of the fixed plate 9 away from the opening, the permanent magnets on the linear motors 7 are fixedly connected with the bottom of the filter assembly 4, and are used to drive the filter assembly 4 to move along the guide groove.

[0026] The filter assembly 4 comprises a box body, a main machine 411 and an active filter 407 are fixedly arranged in the box body, the main machine 411 is provided with a power supply interface 410 and a filter connection end 409, and the main machine 411 is provided with a CT connection module 402 close to one end of the opening. The CT connection module 402 is provided with a power supply port one, a power supply port two and an inverter output port on the surface close to one side of the opening, is provided with a filter terminal 405 on the top, and is sequentially provided with a voltage sampling end, a load current detection end and a compensation current injection end. The active filter 407 comprises a load end 406 and an electricity connection end 408, the electricity connection end 408 is connected with the filter connection end 409 through a wire, and the load end 406 is electrically connected with the filter terminal 405 in correspondence.

[0027] The connecting rod assembly 5 comprises a cylinder 503, a connecting frame plate one 501, and a connecting frame plate two 504. The bottom of the connecting frame plate one 501 is provided with a protruding plate 502, and the top is provided with a rotating shaft one. The rotating shaft one penetrates the bottom sleeve of the cylinder 503 and is movably connected with the cylinder 503. The lower part of the connecting frame plate one 501 is vertically and spacedly provided with a rotating shaft two and a rotating shaft three. The other end of the cylinder 503 is provided with a fixed clamping plate, and the top of the telescopic rod of the cylinder 503 is fixedly connected with the bottom of the fixed clamping plate. The upper part of the connecting frame plate two 504 is vertically and spacedly provided with a rotating shaft four and a rotating shaft six. A connecting rod one 505 is arranged between the rotating shaft two and the rotating shaft four, and a connecting rod two 506 is arranged between the rotating shaft three and the rotating shaft six. The connecting rod one 505 and the connecting rod two 506 are parallel and movably connected with the rotating shafts.

[0028] The frame assembly 6 comprises a frame two fixedly arranged between the two connecting frame plate two 504. The frame two is fixedly arranged with a protruding plate two 604 on the bottom surface, and a plurality of fixed buckles 602 are arranged on the upper surface for fixing the module. A plurality of electrical interface plates 603 are arranged on the inner wall away from the outlet, and an output interface 605 is arranged on the outer wall, corresponding to the power supply port one, the power supply port two and the inverter output port. Heat dissipation through holes two 601 are arranged on the front and rear sides.

[0029] The rear side of the cabinet 1 is fixedly provided with a touch display 8. The rear side plate of the second layer module bin is fixedly provided with a wiring port 801 below the wire pulley 104, and the wires of the touch display 8 are electrically connected with the host 411 through the wiring port 801. The wires of the power supply interface 410 are wound on the wire pulley 104, and the wires on the wire pulley 104 are connected with the power supply take-up device through the wire through hole 1021. The output wires of the power supply take-up device are connected with the power supply 3, realizing automatic release and recovery of the wires.

[0030] The door frame 2 is provided with heat dissipation through holes three 201 corresponding to the power supply bin position on the lower layer, and glass plates 202 are arranged on the corresponding positions of the other four layers, facilitating observation of the situation in the module bin. A plurality of heat dissipation fans 103 are fixedly arranged on the outer frame wall of the frame away from the outlet on the rear side of the cabinet 1, and a plurality of heat dissipation through holes 101 are arranged on the front and rear sides of the cabinet 1, ensuring good heat dissipation of the equipment.

[0031] When it is necessary to place or replace the module, the linear motor 7 is started to drive the filter assembly 4 to move along the guide groove one 1022 and the guide groove two 1023 to the opening direction. At the same time, the double-rod air cylinder 401 is started, the telescopic rod pushes the L-shaped frame 404 to drive the connecting rod assembly 5 to move forward. When reaching a certain position, the air cylinder 503 is started, the telescopic rod pushes the connecting rod one 505 to rotate clockwise around the rotating shaft one, since the connecting rod one 505 and the connecting rod two 506 move in parallel and synchronously, the connecting rod one 505 drives the connecting frame plate two 504 to rotate around the rotating shaft four, and further drives the frame body assembly 6 to rotate outward and downward until the frame body assembly 6 is completely stretched out of the cabinet body 1, so as to facilitate the operator to place the module. After the module is placed, the reverse movement of each driving part makes the frame body assembly 6 reset.

[0032] During the operation of the device, the host 411 introduces the module voltage signal into the sampling end for sampling, the current transformer induces a small current signal proportional to the load current and a voltage signal, which is transmitted to the host 411 through the power supply port two for sampling. The host 411 analyzes the collected load current and voltage signals, drives the active filter 407 to generate a corresponding compensation current, and injects the compensation current into the power grid through the compensation current injection end, so as to realize dynamic elimination of harmonics. At the same time, the host 411 displays the load condition on the touch display 8 at the rear side of the cabinet body 1, so as to facilitate the operator to intuitively monitor the operation state of the device.

[0033] In some examples, the power supply take-up device adopts a scroll spring structure, which automatically tightens or releases the electric wire when the filter assembly moves, avoiding wire entanglement.

[0034] In some examples, bearings are arranged on the rotating shaft one, the rotating shaft two, the rotating shaft three, the rotating shaft four and the rotating shaft six, so as to reduce the friction force in the rotating process, make the movement of the connecting rod assembly 5 more flexible and smooth, and reduce energy consumption.

[0035] In some examples, metal contacts with good conductivity are arranged on the electric interface plate 603, so as to ensure stable and reliable electrical connection with the module, reduce contact resistance, and reduce power loss.

[0036] In some examples, a temperature sensor is arranged in the power supply compartment to monitor the temperature in the power supply compartment in real time, and when the temperature exceeds a set threshold, an alarm is sent through the touch display 8 to remind the operator to handle it in time.

[0037] In some examples, a sealing magnetic strip is embedded in the inner edge of the door frame 2, and a gas-tight structure is formed when the cabinet is closed; an emergency manual unlocking knob is arranged at the end of the telescopic rod of the double-rod air cylinder 401, and the frame body assembly 6 can be manually retracted when power failure occurs.

[0038] The working principle of the application is as follows: When using the active filter cabinet with the convenient module placement, first, the initial installation and wiring of the equipment are completed: the cabinet body 1 is hingedly installed with the door frame 2, the power supply 3 and the power adapter in the power supply compartment are connected with the external power supply system through wires, the wires extending from the power supply interfaces 410 of the filter assemblies 4 on each layer are wound on the wire pulley 104, connected with the power supply take-up through the wire through hole 701, and finally connected with the power supply 3. The touch display 8 is electrically connected with the host 411 through the wiring port 801 of the rear side plate of the second layer module compartment, and the power-on and signal transmission link of the equipment are built.

[0039] When it is necessary to place or replace the module, the operator sends an instruction through the touch display 8 outside the cabinet body 1 to start the module compartment extension program: The fixed plate 9 is powered away from the linear motor 7 embedded in the opening side, the permanent magnet drives the protrusion 403 at the bottom of the filter assembly 4 to slide along the guide groove one and the guide groove two to the opening direction of the cabinet body, so that the filter assembly 4 translates as a whole to the door frame 2 direction, making space for the subsequent frame assembly extension; The double-rod air cylinder 401 at the top and the front and rear sides of the filter assembly 4 is started synchronously, the extension rod pushes the H-shaped frame 404 to move forward, driving the connecting frame plate one 501 of the connecting link assembly 5 to move forward. When reaching the preset position, the air cylinder 503 of the connecting link assembly 5 is started, the extension rod thereof pushes the connecting link one 505 to rotate clockwise around the rotating shaft one, since the connecting link one 505 and the connecting link two 506 are parallel and movably connected through the rotating shaft two, three, four and six, the rotation of the connecting link one 505 synchronously drives the connecting frame plate two 504 to rotate around the rotating shaft four, so that the frame assembly 6 extends outside the cabinet body 1 in the trajectory of outward rotation and downward inclination, at this time, the fixed buckle 602 on the upper surface of the frame two is completely exposed, which is convenient for the operator to place or disassemble the module by hand; After the module is placed on the upper surface of the frame two, it is locked through the fixed buckle 602, and at the same time, the electrical interface of the module is connected with the electrical interface plate 603 on the inner wall of the frame two; After the module installation is completed, the air cylinder 503 reversely moves the connecting link assembly 5 to shrink the frame assembly 6 carrying the module back to the module compartment, the extension rod of the double-rod air cylinder 401 is retracted, the output interface 605 is automatically connected with the power supply ports one and two of the CT connection module 402 of the filter assembly 4 and the inverter output port after the retraction is completed, the physical fixation and circuit connection of the module are completed, the frame assembly 6 is retracted along the original trajectory into the cabinet body 1, the linear motor 7 drives the filter assembly 4 to reset, and the whole process does not need manual operation into the cabinet, which significantly improves the maintenance efficiency.

[0040] When the equipment is running, the host 411 in the filter assembly 4 cooperates with the active filter 407 to realize dynamic management of the power grid harmonics: The voltage sampling end of the CT connection module 402 accesses the module voltage signal through the power supply port one, and the load current detection end senses the load current through the current transformer to generate a proportional small current signal and a voltage signal and deliver them to the host 411 through the power supply port two. The built-in reactor in the host 411 cooperates with the current transformer to collect the voltage and current parameters of the power grid in real time, analyze the load conditions such as harmonic content and phase difference through internal algorithms, and display the data on the touch display 8 at the back side of the cabinet body.

[0041] According to the real-time monitoring data, the host 411 connects the power connection end 408 of the active filter 407 and the filter connection end through the wire, and connects the load end 406 of the active filter 407 with the reactor in the host through the compensation current injection end of the filter terminal 405. Based on the instructions of the host 411, the active filter 407 generates a compensation current with the same amplitude and opposite phase as the harmonic current, and injects it into the power grid through the inverter output port to offset the harmonic pollution generated by the load and realize active optimization of power quality.

[0042] When the filter assembly 4 moves, the power supply wire collector releases or retracts the wire according to the displacement of the linear motor 7. The wire pulley 104 guides the cable to be arranged neatly along the wire through hole 701 in the inner wall of the cabinet body 1, avoiding the entanglement or pulling of the wire caused by the movement of the filter assembly, and ensuring the stability of power supply and signal transmission.

[0043] The above has described the embodiments of the present disclosure, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles, practical applications, or technical improvements in the market of the embodiments, or to enable other ordinary skilled persons in the art to understand the embodiments disclosed herein.

Claims

1. An active filter cabinet that facilitates module placement, characterized in that, include: Cabinet (1) and door frame (2). The cabinet (1) has five layers. The bottom layer is the power supply compartment, and the other four layers are module compartments. The four module compartments have the same structure. Each layer is separated by a fixing plate (102). The fixing plate (102) has a guide rail groove one (1022) and a guide rail groove two (1023). The guide rail groove has a filter component (4). The filter component (4) has a connecting rod component (5) near the opening. The connecting rod component (5) is then fixedly connected to the frame component (6). The power supply compartment bottom plate has a power supply (3) and a power adapter (303). The fixing plate (102) has multiple wire through holes (1021) on the side away from the opening. The wire through holes (1021) have wire pulleys (104) at the top. The wire pulleys (104) are fixed to the inner wall of the cabinet (1). The cabinet (1) has a touch display (8) fixedly installed on the back side. Double-rod cylinders (401) are fixedly installed on the top and front and rear sides of the filter assembly (4). The telescopic rod of the double-rod cylinder (401) is fixedly connected to the connecting rod assembly (5). Multiple linear motors (7) are embedded on the side of the fixed plate (102) away from the opening. The permanent magnet on the linear motor (7) is fixedly connected to the bottom of the filter assembly (4). The cabinet (1) is hinged to the door frame (2). The wire pulley (104) is used to wind the wire on the pulley. The filter assembly (4) is used to continuously monitor the load status of the connected module and actively inject the required compensation current to eliminate harmonic pollution. The linkage assembly (5) is used to realize the automatic extension and retraction of the frame assembly (6) outside the cabinet (1). The frame assembly (6) is used to place and fix the module and is electrically connected to the module.

2. The active filter cabinet for convenient module placement according to claim 1, characterized in that, The filter assembly (4) includes: a housing, a protrusion (403) at the bottom center of the housing, the protrusion (403) slidingly engaging with the guide rail groove (1022), a host (411) and an active filter (407) fixedly installed inside the housing, a power supply interface (410) and a filter connection terminal (409) provided on the host (411), a CT connection module (402) provided at one end of the host (411) near the opening, a reactor and a current transformer provided inside the host (411), the host (411) is used to monitor the load condition, drive the active filter (407) to generate compensation current, and display the load condition on the touch display (8); The CT connection module (402) has a power supply port 1, a power supply port 2, and an inverter output port on the surface near the opening. The top of the CT connection module (402) has a filter terminal (405), which is configured as follows: a voltage sampling terminal, a load current detection terminal, and a compensation current injection terminal. The voltage sampling terminal is connected to the power supply port 1 and is used to introduce the module voltage signal into the host for sampling. The load current detection terminal is connected to the current transformer, which is connected to the power supply port 2. The current transformer is used to sense a small current signal and voltage signal proportional to the load current and transmit them to the host for sampling through the power supply port 2. The compensation current injection terminal is connected to the reactor, which is connected to the inverter output port. The active filter (407) includes a load terminal (406) and a power terminal (408). The power terminal (408) is connected to the filter connection terminal (409) via a wire. The load terminal (406) is divided into three ports, and the three ports are electrically connected to the filter terminal (405). A U-shaped frame (404) is provided on the telescopic rod of the double-rod cylinder (401). The telescopic rod of the double-rod cylinder (401) is fixedly connected to the two sides of the U-shaped frame (404). A connecting rod assembly (5) is provided on the other side of both sides of the U-shaped frame (404).

3. The active filter cabinet for convenient module placement according to claim 2, characterized in that, The connecting rod assembly (5) includes: a cylinder (503), a first connecting frame plate (501) and a second connecting frame plate (504). The bottom of the first connecting frame plate (501) is provided with a protruding plate (502), and the top of the first connecting frame plate (501) is provided with a rotating shaft. The rotating shaft passes through the bottom sleeve of the cylinder (503) and is movably connected to the cylinder (503). The lower part of the first connecting frame plate (501) is vertically spaced from top to bottom and is provided with a second rotating shaft and a third rotating shaft. A fixed clamping plate is provided at the other end of the cylinder (503), and the top of the telescopic rod of the cylinder (503) is fixedly connected to the bottom of the fixed clamping plate; The upper part of the connecting frame plate 2 (504) is vertically spaced from top to bottom with rotating shaft 4 and rotating shaft 6. A connecting rod 1 (505) is provided between rotating shaft 2 and rotating shaft 4, and a connecting rod 2 (506) is provided between rotating shaft 3 and rotating shaft 6. The connecting rods and rotating shafts are movably connected. A rotating shaft six is ​​provided through the first connecting rod (505), and the rotating shaft six is ​​fixed through the fixed clamp plate. The fixed clamp plate is movably connected to the first connecting rod (505), wherein the first connecting rod (505) is parallel to the second connecting rod (506).

4. The active filter cabinet for convenient module placement according to claim 1, characterized in that, The frame assembly (6) includes: a second frame, which is fixedly disposed between the two connecting frame plates (504) on both sides; A raised plate (604) is fixedly installed on the bottom surface of the frame two. Multiple sets of fixing buckles (602) are provided on the upper surface of the frame two. The fixing buckles (602) are used to fix the module. Multiple sets of electrical interface plates (603) are provided on the inner wall of the frame two away from the opening. An output interface (605) is provided on the outer wall of the frame two away from the opening. The output interface (605) is connected to the power supply port one, power supply port two and inverter output port respectively. Heat dissipation holes (601) are provided on both the front and rear sides of the frame two.

5. An active filter cabinet for convenient module placement according to claim 1, characterized in that, The power supply interface (410) of each layer extends out wires and wraps around the wire pulley (104). The wires on the wire pulley (104) pass through the wire through hole (1021) and are connected to the power coiler. The output wires of the power coiler are connected to the power supply (3). The retractor is used to automatically extend and retract the wire when the filter assembly (4) moves.

6. An active filter cabinet for convenient module placement according to claim 3, characterized in that, A guide rail groove 1 (1022) is provided in the center of the fixed plate (102), and guide rail grooves 2 (1023) are provided on the left and right sides of the fixed plate (102). The guide rail grooves 2 (1023) slide in cooperation with the protrusion plate (502).

7. An active filter cabinet for convenient module placement according to claim 1, characterized in that, Multiple cooling fans (103) are fixedly installed on the outer frame wall away from the opening of the frame (1), and multiple heat dissipation holes (101) are provided on the front and rear sides of the frame (1).

8. An active filter cabinet for convenient module placement according to claim 1, characterized in that, The lower layer of the door frame (2) is provided with a heat dissipation hole three (201) corresponding to the power supply compartment, and the other four layers of the door frame (2) are provided with glass plates (202) at the corresponding positions.

9. An active filter cabinet for convenient module placement according to claim 1, characterized in that, The second module compartment from top to bottom has a wiring port (801) fixedly installed below the wire pulley (104) on the rear side panel. The wires of the touch display (8) pass through the wiring port (801) and are electrically connected to the host (411).

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