A harmonic suppression power capacitor module

Abstract

The harmonic suppression power capacitor module of the present invention includes: an inductor and a first temperature sensor in the reactor, a capacitor and a second temperature sensor in the capacitor, and a main board provided with relay A, relay C, mutual inductor A, mutual inductor C, two temperature line sockets, a keypad socket and a miniature circuit breaker; interface A-1 of relay A is connected to the power input interface A-1 of the inductor, the wire of interface A-2 passes through mutual inductor A and is fixed to interface A of the miniature circuit breaker, interface C-1 of relay C is connected to the power input interface C-1 of the inductor, the wire of interface C-2 passes through mutual inductor C and is fixed to interface C of the miniature circuit breaker, the power input interface B-1 of the inductor is connected to interface B of the miniature circuit breaker, interfaces A, B and C of the capacitor are respectively connected to the power output interface A-2, interface B-2 and interface C-2 of the inductor, the interfaces of the temperature sensors are respectively plugged into the corresponding temperature line sockets, and the wiring harness terminals of the keypad are plugged into the keypad socket.

Description

Technical Field

[0001] The present invention relates to the technical field of power capacitor modules, and in particular to a harmonic suppression power capacitor module. Background Art

[0002] The harmonic suppression power capacitor module is a new generation of reactive power compensation equipment for 0.4kV low-voltage distribution networks. It is energy-efficient, filters harmonics, and improves power factor. It replaces traditional reactive power compensation equipment consisting of separate components such as an intelligent reactive power compensation controller, fuses, switches, filter reactors, and power capacitors. The harmonic suppression power capacitor module, based on a capacitor and a reactor, adopts a modular structure, resulting in low cost, simple installation, easy maintenance, convenient heat dissipation, and simple operation, making it suitable for residential power distribution and other work scenarios. Summary of the Invention

[0003] The present invention aims to solve the problems and deficiencies in the prior art and provides a novel harmonic suppression power capacitor module.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] The present invention provides a harmonic suppression power capacitor module, which is characterized in that it includes a base, a capacitor, a reactor, a reactor cover, a lower plastic shell, a main board, a key board and an upper plastic shell, wherein the capacitor is fixed on one side of the base, the reactor is fixed on the other side of the base, the upper cover of the reactor is provided with a reactor cover, the lower plastic shell is fixed on top of the capacitor and the reactor cover, the main board is fixed in the lower plastic shell, the key board is fixed on the inner side of the upper plastic shell, and the upper plastic shell cover is provided on the top of the lower plastic shell;

[0006] The reactor is provided with an inductor and a first temperature sensor, the capacitor is provided with a capacitor and a second temperature sensor, the main board is provided with a transformer, relay A, relay C, mutual inductor A, mutual inductor C, a first temperature line socket, a second temperature line socket, a keypad socket and a miniature circuit breaker, the switch of the miniature circuit breaker is exposed from the upper plastic shell, and the keypad is provided with a dip switch, a key and an indicator light which are exposed from the upper plastic shell;

[0007] Interface A-1 of relay A is connected to the power input interface A-1 of the inductor, interface C-1 of relay C is connected to the power input interface C-1 of the inductor, the wire connected to interface A-2 of relay A passes through mutual inductor A and is fixed to interface A of the miniature circuit breaker, the wire connected to interface C-2 of relay C passes through mutual inductor C and is fixed to interface C of the miniature circuit breaker, the power input interface B-1 of the inductor is connected to interface B of the miniature circuit breaker, interface A of the capacitor is connected to the power output interface A-2 of the inductor, interface B of the capacitor is connected to the power output interface B-2 of the inductor, and interface C of the capacitor is connected to the power output interface C-2 of the inductor. The interfaces at both ends of the first temperature sensor are respectively plugged into the first temperature wire socket through temperature wire terminals, the interface T1 at one end and the interface T2 at the other end of the second temperature sensor are respectively plugged into the second temperature wire socket through temperature wire terminals, and the wiring harness terminals of the dip switch, button and indicator light are plugged into the key board socket;

[0008] The first temperature sensor is used to detect the temperature inside the reactor and transmit it to the external controller, and the second temperature sensor is used to detect the temperature inside the capacitor and transmit it to the external controller;

[0009] The dip switch is used to switch the working state of the power capacitor module. The dip switch allows selection of a debugging state and a working state. The debugging state indicates that manual switching on and off is allowed by pressing a button. The working state indicates that the power capacitor module is controlled by an external controller. When in the working state, the external controller is used to analyze the capacity of the circuit of the distribution cabinet that requires reactive power compensation, control the opening and closing of each relay, and thus control the on and off of the capacitor A and C circuits for compensation, thereby realizing the switching of the capacitor.

[0010] The indicator light is used to display the capacitor switching status and fault indication;

[0011] The transformer is used to convert the high voltage transmitted from the miniature circuit breaker into a low voltage for use by each relay.

[0012] The positive progress of the present invention is that the harmonic suppression power capacitor module of the present invention is mainly composed of a capacitor and a reactor. The product adopts a modular structure, low cost, simple installation, convenient maintenance, convenient heat dissipation, simple operation, and is suitable for working scenarios such as residential power distribution. The present invention can intuitively see the working status of the power capacitor module through the LED light on the keypad, and the working status of the capacitor can be switched by the dial switch. The three-phase electricity of the present invention is first connected to the inductor through a miniature circuit breaker respectively, and then through two relays in the middle, and the inductor is connected in series with the capacitor to control the on and off of the A and C paths of the capacitor, thereby realizing the switching function of the capacitor. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1This is a structural exploded view of a harmonic suppression power capacitor module according to a preferred embodiment of the present invention.

[0014] Figure 2 Schematic diagram of the structure of a keypad according to a preferred embodiment of the present invention.

[0015] Figure 3 This is a front perspective view of a motherboard according to a preferred embodiment of the present invention.

[0016] Figure 4 This is a wiring diagram of the motherboard in a preferred embodiment of the present invention.

[0017] Figure 5 FIG. 1 is a diagram of the connection points of a capacitor according to a preferred embodiment of the present invention.

[0018] Figure 6 This is a wiring diagram of a miniature circuit breaker according to a preferred embodiment of the present invention.

[0019] Figure 7 This is a wiring diagram of the reactor according to a preferred embodiment of the present invention.

[0020] Figure 8 FIG. 1 is a schematic diagram of the installation of a capacitor according to a preferred embodiment of the present invention.

[0021] Figure 9 Schematic diagram of the installation of a reactor according to a preferred embodiment of the present invention.

[0022] Figure 10 FIG. 1 is a schematic diagram of the installation of a motherboard according to a preferred embodiment of the present invention.

[0023] Figure 11 FIG. 1 is a schematic diagram of the installation of a miniature circuit breaker according to a preferred embodiment of the present invention.

[0024] Figure 12 Schematic diagram of the installation of the lower plastic shell of a preferred embodiment of the present invention.

[0025] Figure 13 Schematic diagram of the installation of a keypad according to a preferred embodiment of the present invention.

[0026] Figure 14 This is a schematic diagram of the effect after the keypad of a preferred embodiment of the present invention is installed.

[0027] Figure 15 Schematic diagram of the installation of the upper plastic shell of a preferred embodiment of the present invention.

[0028] Figure 16 This is a three-dimensional diagram of a harmonic suppression power capacitor module according to a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0030] like Figure 1-16 As shown, this embodiment provides a harmonic suppression power capacitor module, which includes a base 10, a capacitor 20, a reactor 30, a reactor cover 40, a lower molded case 50, a main board 60, a keypad 70, an upper molded case 80, and a panel 90. The capacitor 20 is fixed on the left side of the base 10, the reactor 30 is fixed on the right side of the base 10, the upper cover of the reactor 30 is provided with a reactor cover 40, the lower molded case 50 is fixed on the top of the capacitor 20 and the reactor cover 40, the main board 60 is fixed in the lower molded case 50, the keypad 70 is fixed on the inner side of the upper molded case 80, and the upper molded case 80 is covered on the top of the lower molded case 50.

[0031] like Figure 2 As shown, the keypad 70 is provided with a dial switch 71 , a key 72 and an indicator light 73 that are exposed from the upper plastic shell 80 .

[0032] like Figure 3 As shown, the motherboard 60 is provided with a transformer 601, relay A 602, relay C 603, transformer A 604, transformer C 605, a first temperature line socket 613, a second temperature line socket 606, a keypad socket 607, a miniature circuit breaker 608, an RJ45 interface 609, and a 3P terminal 610. The miniature circuit breaker 608 is fixed to the motherboard 60 via a guide rail 611. The guide rail 611 is fixed to the motherboard 60, and the miniature circuit breaker 608 is snapped onto the guide rail 611. The switch of the miniature circuit breaker 608 is exposed from the upper molded case 80. The RJ45 interface 609 and the 3P terminal 610 are exposed from the upper molded case 80. The external controller is connected to the motherboard 60 via the RJ45 interface 609.

[0033] like Figure 4 As shown, relay A 602 has interface A-1 and interface A-2, and relay C 603 has interface C-1 and interface C-2.

[0034] like Figure 5 As shown, a capacitor and a second temperature sensor are provided in the capacitor 20 . The capacitor has interfaces A, B, and C, and the second temperature sensor has interfaces T1 and T2 .

[0035] like Figure 6 As shown, the miniature circuit breaker 608 has a port A, a port B, and a port C.

[0036] like Figure 7 As shown, an inductor and a first temperature sensor are provided in the reactor 30. The inductor has an input power interface A-1, an input power interface B-1 and an input power interface C-1. The inductor has an output power interface A-2, an output power interface B-2 and an output power interface C-2. The first temperature sensor has two interfaces (not shown in the figure).

[0037] Specific installation steps:

[0038] Step 1: If Figure 8 Two clamps 11 are fixed on the left side of the base 10 by four screws, and a capacitor 20 is clamped between the two clamps 11.

[0039] Step 2: If Figure 9 Two L-shaped fixing plates 12 are fixed on the right side of the base 10 by four screws and nuts, and the reactor 30 is fixed between the two L-shaped fixing plates 12 by screws and nuts.

[0040] Step 3: If Figure 10 The main board 60 is installed in the lower plastic shell 50 , and a guide rail 611 is fixed on the main board 60 .

[0041] Step 4: Attach the miniature circuit breaker 608 to the guide rail 611. The installation is complete. Figure 11 .

[0042] Step 5: The wiring of each relay and miniature circuit breaker, capacitor, and reactor on the mainboard is as follows: Connect the interface A-1 of relay A 602 to the power input interface A-1 of the inductor, connect the interface C-1 of relay C 603 to the power input interface C-1 of the inductor, connect the wire connected to the interface A-2 of relay A 602 through the mutual inductor A 604 and then fix it to the interface A of the miniature circuit breaker 608, and connect the wire connected to the interface C-2 of relay C 603 through the mutual inductor C 605 is then fixed to port C of miniature circuit breaker 608. The inductor's power input port B-1 is connected to port B of miniature circuit breaker 608. The capacitor's port A is connected to the inductor's power output port A-2. The capacitor's port B is connected to the inductor's power output port B-2. The capacitor's port C is connected to the inductor's power output port C-2. The first temperature sensor's two end ports are plugged into the first temperature wire socket 613 via temperature wire terminals. The second temperature sensor's port T1 and port T2 are plugged into the temperature wire socket 606 via temperature wire terminals. A long hole is provided at the bottom of the lower plastic case 50, and a notch is provided on the top surface of the reactor cover 40 to facilitate connection between the ports on the capacitor 20 and reactor 30 and the motherboard 60.

[0043] Step 6: Figure 12The reactor cover 40 is installed on the upper part of the reactor 30 after wiring is completed, and fixed with 4 screws on both sides.

[0044] Step 7: Figure 13 , use two screws to fix the keypad 70 to the inner side of the upper plastic shell 80. Figure 14 .

[0045] Step 8: Figure 15 , connect the wiring harness terminal of the keypad 70 to the keypad socket 607 of the mainboard 60, specifically the wiring harness terminals of the dial switch 71, key 72 and indicator light 73 are plugged into the keypad socket 607, and then fix the components of step 7 and step 6 with 3 screws. Specifically, the top of the capacitor 20 is fixed with a hollow positioning column 21 with an internal thread, the top of the reactance cover 40 is fixed with a positioning hole 41 with an internal thread, and the bottom inner side of the lower plastic shell 50 is fixed with a hollow mounting column 51 that matches the hollow positioning column 21 and the positioning hole 41 respectively. The mainboard 60 is provided with a mainboard mounting hole 612 that matches the hollow mounting column 51, and the upper plastic shell 80 is provided with an upper plastic shell mounting hole 81 that matches the bolt. , the mainboard mounting hole 612 is sleeved on the corresponding hollow mounting column 51 so that the mainboard 60 is fixed in the lower plastic shell 50, the hollow mounting column 51 matching the hollow positioning column 21 is sleeved on the corresponding hollow positioning column 21, the hollow mounting column 51 matching the positioning hole 41 is aligned with the corresponding positioning hole 41, and the upper plastic shell mounting holes 81 are sequentially penetrated from top to bottom by bolts 90 and threadedly connected to the hollow positioning column 21, and the upper plastic shell mounting holes 81 are sequentially penetrated from top to bottom by bolts 90 and threadedly connected to the positioning holes 41, so that the lower plastic shell 50 is installed on the top of the capacitor 20 and the reactor cover 40, and the upper plastic shell 80 is covered on the top of the lower plastic shell 50; then the panel 100 is attached to the groove of the upper plastic shell 80. The effect after completion is as follows Figure 16 .

[0046] In this embodiment, the first temperature sensor is used to detect the temperature inside the reactor 30 and transmit the temperature to the external controller, and the second temperature sensor is used to detect the temperature inside the capacitor 20 and transmit the temperature to the external controller.

[0047] The dip switch 71 is used to switch the working state of the power capacitor module. The dip switch 71 allows selection of the debugging state and the working state. The debugging state indicates that manual switching on and off is allowed through the button 72. The working state indicates that the power capacitor module is controlled by an external controller. The external controller is used to analyze the capacity of the circuit of the distribution cabinet that requires reactive power compensation when in the working state, to control the opening and closing of each relay, thereby controlling the on and off of the capacitor A and C lines for compensation, thereby realizing the switching of the capacitor 20.

[0048] The indicator light 73 is used to display the capacitor switching status and fault indication.

[0049] The transformer 601 is used to convert the high voltage transmitted from the miniature circuit breaker 608 into a low voltage for use by each relay.

[0050] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of the present invention.

Claims

1. A harmonic suppression power capacitor module, characterized in that: It includes a base, a capacitor, a reactor, a reactor cover, a lower plastic shell, a main board, a key board and an upper plastic shell. The capacitor is fixed on one side of the base, the reactor is fixed on the other side of the base, the upper cover of the reactor is provided with a reactor cover, the lower plastic shell is fixed on the top of the capacitor and the reactor cover, the main board is fixed in the lower plastic shell, the key board is fixed on the inner side of the upper plastic shell, and the upper plastic shell cover is provided on the top of the lower plastic shell. The reactor is provided with an inductor and a first temperature sensor, the capacitor is provided with a capacitor and a second temperature sensor, the main board is provided with a transformer, relay A, relay C, mutual inductor A, mutual inductor C, a first temperature line socket, a second temperature line socket, a keypad socket and a miniature circuit breaker, the switch of the miniature circuit breaker is exposed from the upper plastic shell, and the keypad is provided with a dip switch, a key and an indicator light which are exposed from the upper plastic shell; Interface A-1 of relay A is connected to the power input interface A-1 of the inductor, interface C-1 of relay C is connected to the power input interface C-1 of the inductor, the wire connected to interface A-2 of relay A passes through mutual inductor A and is fixed to interface A of the miniature circuit breaker, the wire connected to interface C-2 of relay C passes through mutual inductor C and is fixed to interface C of the miniature circuit breaker, the power input interface B-1 of the inductor is connected to interface B of the miniature circuit breaker, interface A of the capacitor is connected to the power output interface A-2 of the inductor, interface B of the capacitor is connected to the power output interface B-2 of the inductor, and interface C of the capacitor is connected to the power output interface C-2 of the inductor. The interfaces at both ends of the first temperature sensor are respectively plugged into the first temperature wire socket through temperature wire terminals, the interface T1 at one end and the interface T2 at the other end of the second temperature sensor are respectively plugged into the second temperature wire socket through temperature wire terminals, and the wiring harness terminals of the dip switch, button and indicator light are plugged into the key board socket; The first temperature sensor is used to detect the temperature inside the reactor and transmit it to the external controller, and the second temperature sensor is used to detect the temperature inside the capacitor and transmit it to the external controller; The dip switch is used to switch the working state of the power capacitor module. The dip switch allows selection of a debugging state and a working state. The debugging state indicates that manual switching on and off is allowed by pressing a button. The working state indicates that the power capacitor module is controlled by an external controller. When in the working state, the external controller is used to analyze the capacity of the circuit of the distribution cabinet that requires reactive power compensation, control the opening and closing of each relay, and thus control the on and off of the capacitor A and C circuits for compensation, thereby realizing the switching of the capacitor. The indicator light is used to display the capacitor switching status and fault indication; The transformer is used to convert the high voltage transmitted from the miniature circuit breaker into a low voltage for use by each relay.

2. The harmonic suppression power capacitor module according to claim 1, characterized in that: Two clamps are fixed on one side of the base, and a capacitor is clamped between the two clamps.

3. The harmonic suppression power capacitor module according to claim 1, characterized in that: Two L-shaped fixing plates are fixed on the other side of the base, and the reactor is fixed between the two L-shaped fixing plates by screws and nuts.

4. The harmonic suppression power capacitor module according to claim 1, characterized in that: Screws are fixed on opposite sides of the upper portion of the reactor, and the reactor cover is fixed by means of screws and nuts.

5. The harmonic suppression power capacitor module according to claim 1, characterized in that: The top of the capacitor is fixed with a hollow positioning column with an internal thread, the top of the inductor cover is fixed with a positioning hole with an internal thread, and the inner side of the bottom of the lower plastic shell is fixed with a hollow mounting column that matches the hollow positioning column and the positioning hole respectively, the main board is provided with a main board mounting hole that matches the hollow mounting column, and the upper plastic shell is provided with an upper plastic shell mounting hole that matches the bolt, the main board mounting hole is sleeved on the corresponding hollow mounting column so that the main board is fixed in the lower plastic shell, the hollow mounting column that matches the hollow positioning column is sleeved on the corresponding hollow positioning column, the hollow mounting column that matches the positioning hole is aligned with the corresponding positioning hole, the upper plastic shell mounting hole is sequentially penetrated from top to bottom by the bolt and is threadedly connected to the hollow positioning column, and the upper plastic shell mounting hole is sequentially penetrated from top to bottom by the bolt and is threadedly connected to the positioning hole, so that the lower plastic shell is installed on the top of the capacitor and the inductor cover, and the upper plastic shell cover is arranged on the top of the lower plastic shell.

6. The harmonic suppression power capacitor module according to claim 1, characterized in that: The keypad is fixed to the inner side of the upper plastic shell by screws.

7. The harmonic suppression power capacitor module according to claim 1, characterized in that: A guide rail is fixed on the main board, and a miniature circuit breaker is clamped on the guide rail.

8. The harmonic suppression power capacitor module according to claim 1, characterized in that: The bottom of the lower plastic shell is provided with a long hole, and the upper surface of the reactor cover is provided with a notch to facilitate the connection between the interfaces on the capacitor and the reactor and the mainboard.

9. The harmonic suppression power capacitor module according to claim 1, characterized in that: The mainboard is also provided with an RJ45 interface and a 3P terminal, the RJ45 interface and the 3P terminal are exposed from the upper plastic shell, and the external controller is connected to the mainboard via the RJ45 interface.

10. The harmonic suppression power capacitor module according to claim 1, characterized in that: The upper plastic shell is provided with grooves corresponding to the exposed positions of the dial switch, the button and the indicator light, and a panel is attached to the grooves.

Images