阅读说明：本技术 基于直流电压控制的并联电力有源滤波器 (Parallel power active filter based on direct-current voltage control ) 是由 李稳良 胡江为 于 2020-04-27 设计创作，主要内容包括：本发明属于电力电子设备技术领域,具体涉及基于直流电压控制的并联电力有源滤波器,包括机箱,所述机箱的中间位置处设有线缆翻板,所述线缆翻板的内部形成容纳线缆的线缆槽,所述线缆翻板上设有排气扇；本发明将器件安装板模块化,设计成可以滑动的安装板,并利用线缆进行电性连接,在设备的中间位置处设置了线缆翻板,将连接用的线缆集中的一起,可以防止线缆与器件之间排布在一起,显得混乱,另外在线缆翻板上以及机箱的一端设置了风扇,一个用于进风一个用于排风,可以在电器元件上形成流动的空气,对内部的电器元件进行散热处理,风扇的前端还设有过滤结构,可以防止灰尘的进入,模块化的设计也有利于清洁和维修。(The invention belongs to the technical field of power electronic equipment, and particularly relates to a parallel power active filter based on direct-current voltage control, which comprises a case, wherein a cable turning plate is arranged at the middle position of the case, a cable groove for accommodating a cable is formed in the cable turning plate, and an exhaust fan is arranged on the cable turning plate; the invention modularizes the device mounting plate, designs the device mounting plate into a slidable mounting plate, utilizes the cable to carry out electrical connection, arranges the cable turning plate at the middle position of the equipment, concentrates the cables for connection together, can prevent the cables and the devices from being arranged together and appearing disorder, arranges fans on the cable turning plate and one end of the case, one is used for air inlet and the other is used for air exhaust, can form flowing air on the electrical elements, carries out heat dissipation treatment on the internal electrical elements, and the front end of the fan is also provided with a filtering structure, can prevent dust from entering, and the modularized design is also beneficial to cleaning and maintenance.)

1. The parallel power active filter based on direct current voltage control is characterized in that: the device comprises a case (1), wherein a cable turning plate (3) is arranged in the middle of the case (1), a cable groove (101) for accommodating a cable is formed in the cable turning plate (3), accommodating spaces for accommodating device installation modules (2) are arranged on two sides of the cable turning plate (3), an exhaust fan (31) is arranged on the cable turning plate (3), the device installation modules (2) are connected with the case (1) in a sliding mode, a drawer (21) connected with the case (1) in a clamping mode is arranged on the outer side of the device installation modules (2), a blowing fan (4) is arranged on one side of the device installation modules (2), an air guide groove (102) is arranged on the inner wall of the accommodating space, one end of the air guide groove (102) is located at the output end of the blowing fan (4), and the other end of the air guide groove (102) extends to the cable groove (101), cable groove (101) with accommodation space intercommunication, the input of fan (4) of blowing is equipped with filtration (5), filtration (5) with quick-witted case (1) can be dismantled and be connected, quick-witted case (1) is kept away from one side of fan (4) of blowing is equipped with terminal cover (11), terminal cover (11) with quick-witted case (1) is articulated, the bottom of terminal cover (11) is equipped with brush row (12), the inside of terminal cover (11) be equipped with device installation module (2) electric connection's terminal row.

2. The parallel power active filter based on direct current voltage control according to claim 1, characterized in that: the filtering structure (5) comprises a handle (51), a frame (52), a filtering net (53) and a guide plate (54), wherein the frame (52) is fixed on one side of the handle (51), and the filtering net (53) and the guide plate (54) are connected to the inner wall of the frame (52).

3. The parallel power active filter based on direct current voltage control according to claim 2, characterized in that: and grooves (521) which are connected with the chassis (1) in a clamping manner are formed in the upper end surface and the lower end surface of the frame (52).

4. The parallel power active filter based on direct current voltage control according to claim 2, characterized in that: the filter screen (53) is detachably connected to the inner wall of the frame (52).

5. The parallel power active filter based on direct current voltage control according to claim 2, characterized in that: the guide plate (54) is fixed on the inner wall of the frame (52), the guide plate (54) is arranged obliquely downwards, an arc plate (541) is arranged on the upper edge of the guide plate (54), and an air inlet groove (501) is formed between the arc plate (541) and the guide plate (54) above the arc plate (541).

6. The parallel power active filter based on direct current voltage control according to any one of claims 2-5, characterized in that: the guide plate (54) is positioned outside the filter screen (53).

7. The parallel power active filter based on direct current voltage control according to claim 1, characterized in that: one end of the cable turning plate (3) is provided with a hinge (32) hinged with the case (1), and the other end of the cable turning plate (3) is connected with the case (1) in a clamping manner.

8. The parallel power active filter based on direct current voltage control according to claim 1, characterized in that: the air guide groove (102) is positioned on the inner wall of the top wall of the case (1) and is positioned above the device installation module (2).

Technical Field

The invention belongs to the technical field of power electronic equipment, and particularly relates to a parallel power active filter based on direct-current voltage control.

Background

An Active Power Filter (APF) is a novel power electronic device for dynamically inhibiting harmonic waves and compensating reactive power, can compensate harmonic waves with variable sizes and frequencies and reactive power with variable sizes and frequencies, is called as active, needs to provide a power supply as the name suggests, can overcome the defects of traditional harmonic wave inhibition and reactive power compensation methods such as L C filters and the like (the traditional method can only realize fixed compensation), realizes dynamic tracking compensation, and can supplement both harmonic waves and reactive power.

The active power filter comprises a cabinet body and a control panel, wherein the cabinet body and the control panel can be sealed to form a component containing cavity, and the component containing cavity comprises a main control unit, a relay, a circuit breaker, a terminal strip, a current transformer, an IGBT (insulated gate bipolar transistor) and a reactance. When the current transformer works, the current transformer detects load current, extracts harmonic components in the load current through calculation of an internal DSP (digital signal processor), then sends the harmonic components to an internal IGBT (insulated gate bipolar translator) through a PWM (pulse-width modulation) signal, controls an inverter to generate a harmonic current which is equal to the load harmonic current in magnitude and opposite in direction, and injects the harmonic current into a power grid to achieve the purpose of filtering

The existing power filter has complex internal structure layout and difficult ventilation and heat dissipation, so that the aging of electronic components in the active power filter is accelerated, the active power filter is unstable in operation, and the replacement and maintenance of parts are not facilitated.

Disclosure of Invention

The invention provides a parallel power active filter based on direct-current voltage control, which aims to solve the problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme: the parallel power active filter based on direct-current voltage control comprises a case, wherein a cable turning plate is arranged in the middle of the case, a cable groove for accommodating a cable is formed in the cable turning plate, accommodating spaces for accommodating device installation modules are formed in two sides of the cable turning plate, an exhaust fan is arranged on the cable turning plate, the device installation modules are in sliding connection with the case, a drawer in clamping connection with the case is arranged on the outer side of the device installation modules, a blowing fan is arranged on one side of the device installation modules, an air guide groove is formed in the inner wall of the accommodating spaces, one end of the air guide groove is located at the output end of the blowing fan, the other end of the air guide groove extends to the cable groove, the cable groove is communicated with the accommodating spaces, a filtering structure is arranged at the input end of the blowing fan, and the filtering structure is detachably connected with the case, the terminal cover is arranged on one side, away from the blowing fan, of the case and hinged to the case, the brush row is arranged at the bottom of the terminal cover, and the terminal row electrically connected with the device installation module is arranged inside the terminal cover.

Preferably, the filtering structure comprises a handle, a frame, a filtering net and a guide plate, the frame is fixed on one side of the handle, and the filtering net and the guide plate are connected to the inner wall of the frame.

Preferably, the upper end face and the lower end face of the frame are provided with grooves which are connected with the chassis in a clamping manner.

Preferably, the filter screen is detachably connected to the inner wall of the frame.

Preferably, the guide plate is fixed on the inner wall of the frame, the guide plate is obliquely and downwardly arranged, an arc plate is arranged on the upper edge of the guide plate, and an air inlet groove is formed between the arc plate and the guide plate above the arc plate.

Preferably, the guide plate is located outside the filter screen.

Preferably, one end of the cable turning plate is provided with a hinge hinged with the case, and the other end of the cable turning plate is connected with the case in a clamping manner.

Preferably, the air guide groove is located on an inner wall of the top wall of the chassis and above the component mounting module.

Compared with the prior art, the invention has the beneficial effects that:

the invention modularizes the device mounting plate, designs the device mounting plate into a slidable mounting plate, utilizes the cable to carry out electrical connection, arranges the cable turning plate at the middle position of the equipment, concentrates the cables for connection together, can prevent the cables and the devices from being arranged together and appearing disorder, arranges fans on the cable turning plate and one end of the case, one is used for air inlet and the other is used for air exhaust, can form flowing air on the electrical elements, carries out heat dissipation treatment on the internal electrical elements, and the front end of the fan is also provided with a filtering structure, can prevent dust from entering, and the modularized design is also beneficial to cleaning and maintenance.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of the filter structure of the present invention;

FIG. 3 is a schematic cross-sectional view of the frame according to the present invention;

fig. 4 is a schematic view of the internal structure of the present invention.

In the figure: 1. a chassis; 101. a cable trough; 102. a gas guide groove; 11. a terminal cover; 12. a brush row; 2. a device mounting module; 21. a drawer; 3. turning over the plate by the cable; 31. an exhaust fan; 32. a hinge; 4. a blower fan; 5. a filter structure; 501. an air inlet groove; 51. a handle; 52. a frame; 521. a groove; 53. a filter screen; 54. a guide plate; 541. an arc plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides the following technical solutions: a parallel power active filter based on direct current voltage control comprises a case 1, a cable turning plate 3 is arranged at the middle position of the case 1, a cable groove 101 for containing a cable is formed in the cable turning plate 3, containing spaces for containing device installation modules 2 are arranged on two sides of the cable turning plate 3, an exhaust fan 31 is arranged on the cable turning plate 3, the device installation modules 2 are connected with the case 1 in a sliding mode, a drawer 21 connected with the case 1 in a clamping mode is arranged on the outer side of the device installation modules 2, a blowing fan 4 is arranged on one side of the device installation modules 2, an air guide groove 102 is arranged on the inner wall of the containing spaces, one end of the air guide groove 102 is located at the output end of the blowing fan 4, the other end of the air guide groove 102 extends to the cable groove 101, the cable groove 101 is communicated with the containing spaces, a filtering structure 5 is arranged at the input end of the blowing fan 4, the filtering structure 5 is detachably connected with the case 1, the terminal cover 11 is hinged to the case 1, a brush row 12 is disposed at the bottom of the terminal cover 11, and a terminal row electrically connected to the device mounting module 2 is disposed inside the terminal cover 11.

In this embodiment, a cable turning plate 3 is disposed at the middle position of a case 1, a cable groove 101 for accommodating cables is formed inside the cable turning plate 3, all the cables connected to a device installation module 2 and a terminal strip are disposed in the cable groove 101, and the corresponding cables can be directly adjusted during maintenance, an exhaust fan 31 is disposed on the cable turning plate 3 and can be used for discharging air in the cable groove 101 to the outside to reduce the heat inside and achieve the purpose of cooling, accommodation spaces for accommodating the device installation module 2 are disposed on both sides of the cable turning plate 3, the device installation module 2 is slidably connected to the case 1, a drawer 21 connected to the case 1 in a snap-fit manner is disposed on the outer side of the device installation module 2, so that the device installation module 2 can be drawn out by the drawer 21 during maintenance while maintaining the electrical connection thereof by the curled cables, a blower fan 4 is disposed on one side of the device installation module 2, the inner wall of the accommodating space is provided with an air guide groove 102, one end of the air guide groove 102 is positioned at the output end of the blowing fan 4, the other end of the air guide groove 102 extends to the cable groove 101, the cable groove 101 is communicated with the accommodating space, the input end of the blowing fan 4 is provided with a filtering structure 5, in the heat dissipation process, the blowing fan 4 blows air to the device installation module 2, the air flow takes away heat generated by devices, the air flow is guided into the cable groove 101 through the air guide groove 102, the introduced air flow can be discharged by an exhaust fan 31 on the cable turning plate 3 so as to achieve the purpose of discharging hot air, the devices on the device installation module 2 are dissipated, the filtering structure 5 is detachably connected with the case 1, the filtering structure 5 is arranged at the air inlet position and can filter particles in the air, one side of the case 1, which is far away from the blowing fan 4, the terminal cover 11 is hinged with the case 1, the bottom of terminal cover 11 is equipped with brush row 12, and the inside of terminal cover 11 is equipped with the terminal row with device installation module 2 electric connection, utilizes brush row 12 can carry out dirt-proof protection to the terminal to guarantee the stability of connecting.

Specifically, the filter structure 5 includes a handle 51, a frame 52, a filter screen 53 and a guide plate 54, the frame 52 is fixed to one side of the handle 51, the filter screen 53 and the guide plate 54 are connected to an inner wall of the frame 52, and the filter screen 53 and the guide plate 54 can be supported by the frame 52.

Specifically, the upper and lower end surfaces of the frame 52 are provided with notches 521 for engaging with the chassis 1, and the frame 52 can be engaged by the notches 521.

Specifically, the filter screen 53 is detachably connected to the inner wall of the frame 52, and the filter screen 53 can be replaced, and the filter screen 53 is made of cotton.

Specifically, the guide plate 54 is fixed on the inner wall of the frame 52, the guide plate 54 is arranged obliquely downward, the upper edge of the guide plate 54 is provided with an arc plate 541, an air inlet channel 501 is formed between the arc plate 541 and the guide plate 54 above the arc plate 541, and after the particulate matters slide on the guide plate 54, the particulate matters can descend due to the arc plate 541, so that the particulate matters are prevented from entering.

Specifically, the guide plate 54 is located outside the filter screen 53, and the particulate matter can be filtered and isolated by the guide plate 54.

Specifically, one end of the cable turning plate 3 is provided with a hinge 32 hinged to the case 1, and the other end of the cable turning plate 3 is connected with the case 1 in a clamping mode, so that the cable turning plate 3 can rotate conveniently.

Specifically, the air guide groove 102 is located on the inner wall of the top wall of the chassis 1 and above the component mounting module 2, which is beneficial to discharging heat.

The working principle and the using process of the invention are as follows: the middle position of the case 1 is provided with a cable turning plate 3, a cable groove 101 for accommodating cables is formed inside the cable turning plate 3, all the cables connected on the device installation module 2 and the terminal strip are arranged in the cable groove 101, the corresponding cables can be directly adjusted when in maintenance, the cable turning plate 3 is provided with an exhaust fan 31 which can be used for discharging the air in the cable groove 101 outwards to reduce the internal heat and achieve the purpose of cooling, two sides of the cable turning plate 3 are provided with accommodating spaces for accommodating the device installation module 2, the device installation module 2 is connected with the case 1 in a sliding way, the outer side of the device installation module 2 is provided with a drawer 21 which is clamped and connected with the case 1, in this way, the device installation module 2 can be drawn out by the drawer 21 when in maintenance, meanwhile, the electric connection of the curled cables is kept, one side of the device installation module 2 is provided with a blowing fan 4, the inner wall of the accommodating space is provided with an air guide groove 102, one end of the air guide groove 102 is positioned at the output end of the blowing fan 4, the other end of the air guide groove 102 extends to the cable groove 101, the cable groove 101 is communicated with the accommodating space, the input end of the blowing fan 4 is provided with a filtering structure 5, in the heat dissipation process, the blowing fan 4 blows air to the device installation module 2, the air flow takes away heat generated by devices, the air flow is guided into the cable groove 101 through the air guide groove 102, the introduced air flow can be discharged by an exhaust fan 31 on the cable turning plate 3 so as to achieve the purpose of discharging hot air, the devices on the device installation module 2 are dissipated, the filtering structure 5 is detachably connected with the case 1, the filtering structure 5 is arranged at the air inlet position and can filter particles in the air, one side of the case 1, which is far away from the blowing fan 4, the terminal cover 11 is hinged with the case 1, the bottom of terminal cover 11 is equipped with brush row 12, and the inside of terminal cover 11 is equipped with the terminal row with device installation module 2 electric connection, utilizes brush row 12 can carry out dirt-proof protection to the terminal to guarantee the stability of connecting.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.