Capacitance compensation device

Abstract

The invention provides a capacitance compensation device, and relates to the technical field of electrical components. The capacitance compensation device provided by the invention comprises a capacitor body and a magnetic latching relay, the magnetic latching relay comprises a magnetic latching relay body and a first contact extension part, and the first contact extension part is electrically connected with one of a static contact or a moving contact in the magnetic latching relay body. The first contact extension portion is exposed outside the magnetic latching relay body. The magnetic latching relay is located on the side, away from the shell, of the wire holder, is fixed to the wiring port through the first contact extension part and is electrically connected with the wiring port. Based on the capacitance compensation device provided by the invention, the separation difficulty of a strong electric signal and a weak electric signal can be reduced, the number of the magnetic latching relays can be increased, the number of capacitors in the capacitor body can be increased, the compensation capability is improved, and the cost is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of low-voltage reactive power compensation, and in particular to a capacitor compensation device. Background Art

[0002] Voltage compensator is a device used to improve the power factor of power system and improve the power quality. It automatically detects and controls reactive power and dynamically switches capacitor banks to optimize the operating efficiency of the system.

[0003] The capacitor compensation device includes a capacitor body, a magnetic latching relay, a main board, and a circuit breaker. The main function of the main board is to monitor the system's voltage, current, power factor and other parameters, calculate the required reactive power based on the monitoring data, and decide whether the capacitor needs to be switched, and send a drive signal to control the action of the magnetic latching relay. The magnetic latching relay is welded to the main board. The capacitor compensation device of this structure has the following shortcomings:

[0004] First: It is difficult to isolate the strong and weak electrical signals on the motherboard.

[0005] Second: Capacitor compensation devices are mostly 2 in total, or 1 in total and 1 in total, and the compensation capacity is low. Summary of the invention

[0006] Based on the deficiencies of existing capacitor compensation devices, the present application provides a capacitor compensation device, which can reduce the difficulty of separating strong current signals and weak current signals on the motherboard and is conducive to improving the compensation capability of the capacitor compensation device.

[0007] The technical solutions for this application are as follows:

[0008] The capacitor compensation device provided by the present application includes a capacitor body and a magnetic latching relay, wherein the capacitor body includes a housing, a capacitor and a terminal block, wherein the capacitor is arranged in the housing, and the terminal block is arranged outside the housing, and a terminal port is arranged on the terminal block, and the terminal port is electrically connected to the capacitor. The magnetic latching relay includes a magnetic latching relay body and a first contact extension, wherein the first contact extension is electrically connected to one of the stationary contact or the moving contact in the magnetic latching relay body, and the first contact extension is exposed outside the magnetic latching relay body. The magnetic latching relay is located on a side of the terminal block away from the housing, and is fixed to the terminal port through the first contact extension, and is electrically connected to the terminal port.

[0009] Based on the capacitor compensation device provided by the present application, the magnetic latching relay is fixed to the wiring seat, and the first contact extension of the magnetic latching relay is electrically connected to the wiring port. In this way, when the magnetic latching relay is turned on, the electrical signal conducted by the magnetic latching relay can directly enter the capacitor body without passing through the main board. In this way, the number of strong electric signals passing through the main board can be reduced, which also reduces the difficulty of separating strong electric signals from weak electric signals. In addition, the wiring seat provides a larger installation space for the magnetic latching capacitor. Compared with the capacitor compensation device in which the magnetic latching relay is set on the main board, the capacitor compensation device provided by the present application can increase the number of magnetic latching relays, and then increase the number of capacitors in the capacitor body, thereby improving the compensation capability and reducing the cost.

[0010] In a possible design, the first contact extension is provided with a connection hole, and the first contact extension is fixedly connected to the wiring port by a threaded fastener. In this way, it is equivalent to the magnetic latching relay being fixedly connected to the wiring seat by a screw, and this connection method is more secure than the welding point connection.

[0011] In a possible design, the capacitance compensation device includes a circuit breaker, the circuit breaker is located at one end of the housing where the wiring socket is provided, and the output port of the circuit breaker is close to the magnetic latching relay. The magnetic latching relay also includes a second contact extension portion, the second contact extension portion is electrically connected to the other of the static contact or the moving contact in the magnetic latching relay body, and the second contact extension portion is exposed outside the magnetic latching relay body. The second contact extension portion is connected to the conductive sheet through a first set of wires, and the conductive sheet is electrically connected to the output port.

[0012] Based on the capacitor compensation device provided by this embodiment, the circuit breaker is located at one end of the housing where the wiring socket is set, and the output port of the circuit breaker is close to the magnetic latching relay, so that the circuit breaker is convenient for electrical connection with the magnetic latching relay, and at the same time, the overall structure of the voltage compensation device can be made more compact. The second contact extension of the magnetic latching relay is connected to the conductive sheet through the first set of wires, and the conductive sheet is electrically connected to the output port. In this way, the circuit breaker can cut off the circuit at any time in the event of overload, short circuit, etc., so as to protect the magnetic latching relay and the capacitor from damage.

[0013] In a possible design, the capacitor compensation device includes a main board, which is located at an end of the magnetic latching relay away from the capacitor body.

[0014] The main board is provided with a driving signal terminal, and the driving signal terminal is electrically connected to the coil terminal of the magnetic latching relay through a second group of wires.

[0015] And / or, the mainboard is provided with a capacitor terminal voltage sampling signal terminal, and the capacitor terminal voltage sampling signal terminal is electrically connected to the first contact extension portion of the magnetic latching relay through a third group of wires.

[0016] And / or, the mainboard is provided with a power supply voltage terminal, and the power supply voltage terminal is electrically connected to the conductive sheet through a fourth group of wires.

[0017] Based on the capacitor compensation device provided by this embodiment, the main board is located at one end of the magnetic holding relay away from the capacitor body. The main board is provided with a drive signal terminal, a capacitor end voltage sampling signal terminal and a power supply voltage terminal. The main board sends a drive signal to the magnetic holding relay through the drive signal terminal, adopts the voltage of the capacitor through the capacitor end voltage sampling signal terminal, and is connected to the circuit breaker through the power supply voltage terminal. In this way, the capacitor compensation device provided by this application is safe, reliable, and has a reasonable spatial layout.

[0018] In a possible design, the capacitance compensation device further includes a communication unit, which is used for information exchange between different capacitance compensation devices, and the communication unit is integrated into the mainboard.

[0019] In a possible design, the capacitance compensation device further includes a human-computer interaction unit, which is used for display and parameter setting, and the human-computer interaction unit is integrated into the mainboard.

[0020] Based on the capacitance compensation device provided in this embodiment, the main board is integrated with the communication unit, or the main board is integrated with the human-computer interaction unit, or the main board is integrated with the communication unit and the human-computer interaction unit, which simplifies the composition structure of the capacitance compensation device, makes assembly easier, and saves installation space to a certain extent.

[0021] In a possible design, the capacitance compensation device further includes a cover.

[0022] The cover shell comprises a first component and a second component, wherein the first component is arranged on the periphery of the magnetic holding relay and the main board, and the main board is fixedly installed by relying on the first component.

[0023] The second component is located between the housing and the circuit breaker, and the second component supports the circuit breaker.

[0024] Based on the capacitor compensation device provided by this embodiment, the first component is arranged on the periphery of the magnetic latching relay and the main board, so that the cover plays a protective role for the magnetic latching relay, the main board and the related connection circuits. In the present application, the main board is also fixed with the help of the first component of the cover, so that it is conducive to simplifying the component structure of the capacitor compensation device and the overall layout is more reasonable. The present application arranges the second component between the shell of the capacitor body and the circuit breaker, so that the second component can play a role in supporting the circuit breaker, so that the installation of the circuit breaker is more stable, which helps to improve the working reliability of the circuit breaker.

[0025] In a possible design, a support column for supporting the circuit breaker is also provided on the wiring seat.

[0026] The supporting column passes through the second component to support the circuit breaker and is fixedly connected to the circuit breaker.

[0027] Based on the capacitor compensation device provided in this embodiment, a support column for supporting the circuit breaker is arranged on the terminal block. In this way, the circuit breaker can be supported by the support column to reduce the support burden of the second component and enhance the overall reliability of the capacitor compensation device.

[0028] In a possible design, screw holes are provided on both sides of the wiring base, and the cover is fixedly connected to the wiring base by screws. In this way, the cover is fixedly connected to the wiring base by screws, which has the characteristics of simple structure and easy implementation.

[0029] In one possible design, there are three groups of wiring ports, each group of wiring ports includes 1 A-phase electrical wiring port, 1 B-phase electrical wiring port and 1 C-phase electrical wiring port.

[0030] The A-phase electrical wiring port, the B-phase electrical wiring port and the C-phase electrical wiring port in each group of wiring ports are arranged in a triangle.

[0031] The three A-phase electrical wiring ports of the three groups of wiring ports are arranged in a straight line, the three B-phase electrical wiring ports are arranged in a straight line, and the three C-phase electrical wiring ports are arranged in a straight line.

[0032] Based on the capacitance compensation device provided by this embodiment, there are three groups of wiring ports, and the A-phase electrical wiring port, the B-phase electrical wiring port and the C-phase electrical wiring port in each group of wiring ports are arranged in a triangle. The three A-phase electrical wiring ports in the three groups of wiring ports are arranged in a straight line. The three B-phase electrical wiring ports are arranged in a straight line, the three C-phase electrical wiring ports are arranged in a straight line, and the three B-phase electrical wiring ports are arranged in a straight line. The wiring ports adopt this method, which is conducive to saving space, facilitating the installation of magnetic latching relays, and realizing a three-common capacitance compensation device. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 Shown is a schematic diagram of the composition structure of a capacitor compensation device in the related art.

[0034] Figure 2 A schematic diagram of the structure of a capacitance compensation device provided in an embodiment of the present application.

[0035] Figure 3 for Figure 2 Schematic diagram of the exploded structure of the capacitor compensation device shown.

[0036] Figure 4 for Figure 3 Schematic diagram of the structure of the magnetic latching relay.

[0037] Figure 5The figure is a circuit schematic diagram of a 1 in 1 capacitor compensation device.

[0038] Figure 6 Shown Figure 2 The structure shown is a schematic diagram of the structure after adding a circuit breaker.

[0039] Figure 7 for Figure 2 Connection diagram of the magnetic latching relay part.

[0040] Figure 8 for Figure 2 and Figure 3 Schematic diagram of the top view of the capacitor body.

[0041] Fig. 9 for Figure 6 The structure shown is a schematic diagram of the structure after adding the main board.

[0042] Fig.10 for Fig. 9 The schematic diagram of the structure of the capacitor compensation device after adding a cover is shown.

[0043] Fig.11 for Fig.10 Schematic diagram of the structure of the middle cover.

[0044] Fig.12 for Figure 7 Bottom view of .

[0045] Fig.13 This is an arrangement and wiring diagram of a magnetic latching relay in a two-point capacitance compensation device provided in an embodiment of the present application.

[0046] The reference numerals in the related art are: A1, capacitor body; A2, support frame; A3, main board; A4, magnetic latching relay; A5, transformer;

[0047] The relevant figures in this application are:

[0048] B1, capacitor body; B11, housing; B12, terminal block; B121, terminal port; B1211, A-phase terminal port; B1212, B-phase terminal port; B1213, C-phase terminal port; B122, support column; B123, screw hole;

[0049] B2, magnetic latching relay; B21, second contact extension; B22, first contact extension; B221, connection hole; B23, coil terminal;

[0050] B3, circuit breaker; B31, output port of circuit breaker;

[0051] B41, first group of wires; B42, conductive sheet; B421, A phase conductive sheet; B422, B phase conductive sheet; B423, C phase conductive sheet; B43, second group of wires; B44, third group of wires; B45, fourth group of wires; B46, first conductive strip; B47, second conductive strip;

[0052] B5, mainboard; B51, drive signal terminal; B52, capacitor voltage sampling signal terminal; B53, power supply voltage terminal;

[0053] B6, communication unit;

[0054] B7, Human-computer interaction unit;

[0055] B8, cover; B81, first component; B82, second component. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0057] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims and the accompanying drawings of this application are intended to cover non-exclusive inclusions.

[0058] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase "embodiments" in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0059] The term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0060] In addition, the terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0061] In the description of the present application, unless otherwise specified, "plurality" means more than two (including two), and similarly, "multiple groups" means more than two groups (including two).

[0062] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, the "connection" or "connection" of a mechanical structure may refer to a physical connection. For example, the physical connection may be a fixed connection, such as a fixed connection through a barrier, such as a fixed connection through a screw, bolt or other barrier. The physical connection may also be a detachable connection, such as a mutual snap-on or snap-on connection. The physical connection may also be an integral connection, such as a connection formed by welding, bonding or integral molding. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In addition to referring to a physical connection, the "connection" or "connection" of a circuit structure may also refer to an electrical connection or a signal connection. For example, it may be a direct connection, that is, a physical connection, or it may be an indirect connection through at least one intermediate element, as long as the circuit is connected, or it may be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application may be understood according to the specific circumstances.

[0063] The following is a detailed description of the present application based on the research and development background technology of the present application.

[0064] Figure 1 The figure shows a schematic diagram of the structure of a capacitor compensation device in the related art. In order to clearly show the installation positions of the main components of the capacitor compensation device, Figure 1 The relevant electrical connection wires are omitted.

[0065] Please refer to Figure 1 The capacitor compensation device includes a capacitor body A1, a support frame A2, a main board A3, a magnetic latching relay A4, etc. The support frame A2 is fixed to one end of the capacitor body A1, and there is a wiring space between the support frame A2 and the capacitor body A1.

[0066] The main board A3 is fixed to a side of the support frame A2 away from the housing, the magnetic latching relay A4 is electrically connected to a side of the main board A3 away from the support frame A2, and the magnetic latching relay A4 is electrically connected to the capacitor body A1 through a wiring space.

[0067] When working, the main board A3 controls the closing and opening of the magnetic latching relay A4 through the driving signal to realize the switching of the capacitor in the capacitor body A1.

[0068] The capacitance compensation device of this structure has the following shortcomings:

[0069] First: Since the electrical signal conducted by the magnetic latching relay A4 is generally AC230, which is a strong current, and the driving signal sent by the mainboard A3 to the magnetic latching relay A4 is a weak current, there are both strong and weak current signals on the mainboard A3, and it is difficult to isolate the weak and strong current signals.

[0070] Second: The installation area of ​​the mainboard A3 is generally limited by the end surface area of ​​the capacitor body A1. In addition to installing the magnetic latching relay A4, the mainboard A3 will also be equipped with other electronic components, such as transformer A5, to support the function of the mainboard A3. At present, the number of magnetic latching relays A4 that can be installed on the mainboard A3 is relatively small, which affects the number of capacitors in the capacitor body A1.

[0071] Based on this, the present application provides a capacitance compensation device. Figure 2 This is a schematic diagram of the structure of the capacitance compensation device provided in the embodiment of the present application. Figure 3 for Figure 2 Schematic diagram of the exploded structure of the capacitor compensation device shown. Figure 4 for Figure 3 Schematic diagram of the structure of the magnetic latching relay.

[0072] Please refer to Figures 2 to 3 The capacitor compensation device provided in the present application includes a capacitor body B1 and a magnetic holding relay B2. The capacitor body B1 includes a shell B11, a capacitor and a terminal block B12. The capacitor is arranged in the shell B11, and the terminal block B12 is arranged outside the shell B11. A terminal port B121 is arranged on the terminal block B12, and the terminal port B121 is electrically connected to the capacitor.

[0073] Please refer to Figure 4 The magnetic holding relay B2 includes a magnetic holding relay B2 body and a first contact extension B22. The first contact extension B22 is electrically connected to one of the stationary contact or the moving contact in the magnetic holding relay B2 body, and the first contact extension B22 is exposed outside the magnetic holding relay B2 body.

[0074] Please refer to Figure 3 The magnetic latching relay B2 is located on a side of the wiring base B12 away from the housing B11, is fixed to the wiring port B121 through the first contact extension portion B22, and is electrically connected to the wiring port B121.

[0075] It needs to be explained that the magnetic latching relay B2 body mentioned in the present application has the functions of a general magnetic latching relay B2. A moving contact and a static contact are provided in the magnetic latching relay B2 body. When the magnetic latching relay B2 is closed, the moving contact and the static contact provided in the magnetic latching relay B2 body are in contact. When the magnetic latching relay B2 is opened, the moving contact and the static contact provided in the magnetic latching relay B2 body are separated.

[0076] In the present application, the first contact extension B22 is provided to be fixed and electrically connected to the connection port B121 of the capacitor body B1. In this way, when the magnetic latching relay B2 is closed, the corresponding capacitor in the capacitor body B1 can be connected. When the magnetic latching relay B2 is opened, the corresponding capacitor in the capacitor body B1 can be cut off.

[0077] It can be understood that in the present application, the magnetic holding relay B2 is fixed to the terminal block B12, and the first contact extension B22 of the magnetic holding relay B2 is electrically connected to the terminal port B121. In this way, when the magnetic holding relay B2 is turned on, the electrical signal conducted by the magnetic holding relay B2 can directly enter the capacitor body B1 without passing through the main board B5. In this way, the number of strong electrical signals passing through the main board B5 can be reduced, thereby reducing the difficulty of separating strong electrical signals from weak electrical signals.

[0078] It is understandable that in this application, the area of ​​the wiring base B12 is also subject to the end surface area of ​​the capacitor body B1, but since there are no other electrical components on the wiring base B12 except the wiring port B121, under the same conditions, the wiring base B12 can be provided with more magnetic latching relays B2 relative to the main board B5.

[0079] Figure 5 The circuit schematic diagram of a 1-to-1 capacitor compensation device is shown in FIG. A, B, C, and N correspond to the A-phase, B-phase, C-phase, and reference voltage in the three-phase four-wire system, respectively. K1, K2, K3, K4, and K5 are respectively the normally open contacts of different magnetic latching relays B2, and UA, UB, UC, and UN are respectively the different normally open contacts of the circuit breaker B3. The three-phase common compensation capacitor is a triangle-connected capacitor group composed of capacitors C1, C2, and C3. The separate compensation capacitor is a star-connected capacitor group composed of capacitors C4-C6.

[0080] Depend on Figure 5 It can be seen intuitively that a three-phase common compensation capacitor needs at least two magnetic latching relays B2 to cooperate with it. For a separate compensation capacitor, at least three magnetic latching relays B2 are required to cooperate with it. Therefore, the number of magnetic latching relays B2 can restrict the number of common compensation capacitors and separate compensation capacitors in the capacitor body B1.

[0081] In practice, the capacitance compensation device currently used to set the magnetic latching relay B2 by the mainboard B5 is mostly 2 in total, or 1 in total and 1 in total. By using the capacitance compensation device provided by the present application, 3 in total, or 2 in total and 1 in total, can be achieved.

[0082] In summary, the capacitor compensation device provided by the present application sets the magnetic latching relay B2 on the terminal block B12. When the magnetic latching relay B2 is turned on, the electrical signal conducted by the magnetic latching relay B2 can directly enter the capacitor body B1 without passing through the main board B5. In this way, the number of strong electrical signals passing through the main board B5 can be reduced, which also reduces the difficulty of separating strong electrical signals from weak electrical signals. In addition, the terminal block B12 provides a larger installation space for the magnetic latching capacitor. Compared with the capacitor compensation device in which the magnetic latching relay B2 is set on the main board B5, the capacitor compensation device provided by the present application can increase the number of magnetic latching relays B2, and then increase the number of capacitors in the capacitor body B1, thereby improving the compensation capability and reducing the cost.

[0083] Please continue to refer to Figure 1 In the related art, the magnetic latching relay A4 is generally fixed on the main board A3 by welding. Since the pins of the magnetic latching relay A4 are relatively thick, the welding points of the pins on the main board A3 are not firm.

[0084] Based on this, please continue to refer to Figure 2 , Figure 3 and Figure 4 In some embodiments of the present application, the first contact extension B22 is provided with a connection hole B221, and the first contact extension B22 is fixedly connected to the wiring port B121 by a threaded fastener. In this way, the magnetic latching relay B2 is fixedly connected to the wiring seat B12 by screws, and this connection method is more secure than the welding point connection.

[0085] Please combine Figure 3 and Figure 4 In the embodiment of the present application, the first contact extension portion B22 is in a right angle shape, the transverse portion of the first contact extension portion B22 is substantially parallel to the plane where the terminal block B12 is located, and a connecting hole B221 is provided on the transverse portion. This facilitates fixed connection between the magnetic holding relay B2 and the terminal port B121, and the connection is more stable.

[0086] Since the first contact extension portion B22 is conductive, after the first contact extension portion B22 is fixedly connected to the wiring port B121, the first contact extension portion B22 is electrically connected to the corresponding capacitor.

[0087] It should be noted that in some other embodiments of the present application, the first contact extension portion B22 may also be fixed to the wiring port B121 by plugging, crimping or other methods, and the present application does not impose any limitation on this.

[0088] Figure 6 Shown Figure 2 The structure shown is a schematic diagram of the structure after adding a circuit breaker. Please refer to Figure 6 In some embodiments of the present application, the capacitance compensation device includes a circuit breaker B3, which is located at one end of the housing B11 where a terminal block B12 is provided, and an output port of the circuit breaker B3 is close to the magnetic latching relay B2.

[0089] Figure 7 for Figure 2 Please refer to the connection structure diagram of the magnetic latching relay part. Figure 4 , Figure 6 and Figure 7 The magnetic latching relay B2 further includes a second contact extension B21, which is electrically connected to the other of the static contact or the moving contact in the body of the magnetic latching relay B2, and the second contact extension B21 is exposed outside the body of the magnetic latching relay B2. The second contact extension B21 is connected to the conductive sheet B42 through the first group of wires B41, and the conductive sheet B42 is electrically connected to the output port of the circuit breaker B3.

[0090] Please combine Figure 5 , Figure 6 and Figure 7 In some embodiments of the present application, the circuit breaker B3 is arranged at the power supply end of the capacitor compensation device, and its main function is to protect the capacitor from overload, short circuit and other electrical faults.

[0091] In the present application, the circuit breaker B3 is located at one end of the shell B11 where the terminal block B12 is set, and the output port of the circuit breaker B3 is close to the magnetic latching relay B2. This facilitates the electrical connection between the circuit breaker B3 and the magnetic latching relay B2, and at the same time, it can also make the overall structure of the voltage compensation device more compact.

[0092] The second contact extension B21 of the magnetic holding relay B2 is connected to the conductive sheet B42 through the first set of wires B41, and the conductive sheet B42 is electrically connected to the output port. In this way, the circuit breaker B3 can cut off the circuit at any time in the event of overload, short circuit, etc., to protect the magnetic holding relay B2 and the capacitor from damage.

[0093] It should be noted that the conductive sheet B42 in the present application does not refer to one conductive sheet B42, and the number of conductive sheets B42 is generally the same as the number of output ports of the circuit breaker B3. The number of wires in the first group of wires B41 is the same as the number of magnetic latching relays B2 in the capacitor compensation device, and the second contact extension B21 of each magnetic latching relay B2 is electrically connected to the corresponding conductive sheet B42 through an independent wire, and the conductive sheet B42 is electrically connected to the corresponding output port of the circuit breaker B3, so that the circuit breaker B3 can control the on and off of the magnetic latching relay B2.

[0094] For example, Figure 3 , Figure 6 and Figure 7 As shown, in some embodiments of the present application, the circuit breaker B3 is a three-level circuit breaker B3, and its output ports include an A-phase electrical output port, a B-phase electrical output port, and a C-phase electrical output port. Then, correspondingly, the conductive sheet B42 includes an A-phase electrical conductive sheet B421, a B-phase electrical conductive sheet B422, and a C-phase electrical conductive sheet B423.

[0095] Figure 8 for Figure 2 and Figure 3 In some embodiments of the present application, the connection port B121 of the connection base B12 includes a plurality of A-phase electrical connection ports B1211, a plurality of B-phase electrical connection ports B1212, and a plurality of C-phase electrical connection ports B1213.

[0096] Please combine Figure 3 , Figure 7 and Figure 8 Each A-phase electrical connection port B1211 and each C-phase electrical connection port B1213 are connected to a magnetic latching relay B2 through the first contact extension B22, then the second contact extension B21 of the magnetic latching relay B2 connected to each A-phase electrical connection port B1211 will be connected to the same A-phase electrical conductive plate B421 through a wire in the first group of wires B41. The second contact extension B21 of the magnetic latching relay B2 connected to each C-phase electrical connection port B1213 will be connected to the same C-phase electrical conductive plate B423 through a wire in the first group of wires B41.

[0097] Fig. 9 for Figure 6 The structure shown is a schematic diagram of the structure after adding the main board, please refer to Figure 6 , Figure 7 and Fig. 9In some embodiments of the present application, the capacitor compensation device includes a main board B5, which is located at one end of the magnetic latching relay B2 away from the capacitor body B1. The main board B5 is provided with a drive signal terminal B51, which is electrically connected to the coil terminal B23 of the magnetic latching relay B2 through a second group of wires B43.

[0098] Specifically, in this application, the main function of the mainboard B5 is to monitor the system's voltage, current, power factor and other parameters, calculate the required reactive power based on the monitoring data, decide whether the capacitor needs to be switched, and send a drive signal to control the action of the magnetic holding relay B2.

[0099] Please combine Figure 7 and Fig. 9 In the present application, the main board B5 is located at one end of the magnetic holding relay B2 away from the capacitor body B1, and the main board B5 is provided with a drive signal terminal B51, so that the main board B5 can be electrically connected to the coil terminal B23 of the magnetic holding relay B2 through the second group of wires B43 to send a drive signal to the magnetic holding relay B2.

[0100] Please continue to refer to Figure 6 , Figure 7 and 9 In some embodiments of the present application, the main board B5 is provided with a capacitor terminal voltage sampling signal terminal B52, and the capacitor terminal voltage sampling signal terminal B52 is electrically connected to the first contact extension portion B22 of the magnetic holding relay B2 through a third group of wires B44.

[0101] Please combine Figure 6 , Figure 7 and Fig. 9 Based on the capacitor compensation device provided by this embodiment, the mainboard B5 is electrically connected to the first contact extension B22 of the magnetic latching relay B2 through the capacitor end voltage sampling signal terminal B52 and the third group of wires B44 in sequence. As before, the first contact extension B22 of the magnetic latching relay B2 is electrically connected to the wiring port B121, and the wiring port B121 is electrically connected to the capacitor. In this way, the mainboard B5 of the present application can collect the voltage signal of the capacitor through the capacitor end voltage sampling signal terminal B52, the third group of wires B44, and the first contact extension B22 of the magnetic latching relay B2 in sequence.

[0102] The main board B5 can determine the voltage zero point and current zero point according to the collected voltage signal, and can control the magnetic latching relay B2 to switch on the capacitor when the voltage is zero and to switch off the capacitor when the current is zero, thereby achieving zero-crossing switching and ensuring that there is no inrush current and arc during the switching process of the capacitor.

[0103] Please continue to refer to Figure 6 , Figure 7and Fig. 9 In some embodiments of the present application, the mainboard B5 is provided with a power supply voltage terminal B53, and the power supply voltage terminal B53 is electrically connected to the conductive sheet B42 through the fourth group of wires B45. In this way, the external power supply can supply power to the mainboard B5 through the circuit breaker B3 to maintain the normal operation of the mainboard B5. The circuit breaker B3 can also cut off the circuit to protect the mainboard B5 in abnormal situations such as overvoltage and circuit breakage.

[0104] In summary, in some embodiments of the present application, the main board B5 is located at one end of the magnetic holding relay B2 away from the capacitor body B1, and the main board B5 is provided with a drive signal terminal B51, a capacitor end voltage sampling signal terminal B52 and a power supply voltage terminal B53. The main board B5 sends a drive signal to the magnetic holding relay B2 through the drive signal terminal B51, adopts the voltage of the capacitor through the capacitor end voltage sampling signal terminal B52, and is connected to the circuit breaker B3 through the power supply voltage terminal B53. In this way, the capacitor compensation device provided by the present application is safe, reliable, and has a reasonable spatial layout.

[0105] In addition, if Figure 7 As shown, in the present application, the second group of wires B43 are located outside the mainboard B5 and are not wired inside the mainboard B5. This can reduce the wiring pressure of the mainboard B5 and help reduce the wiring area of ​​the mainboard B5.

[0106] Please continue to refer to Fig. 9 In some embodiments of the present application, the capacitance compensation device further includes a communication unit B6, which is used for information exchange between different capacitance compensation devices, and the communication unit B6 is integrated into the mainboard B5.

[0107] In some embodiments of the present application, the capacitance compensation device further includes a human-computer interaction unit B7, which is used for display and parameter setting, and the human-computer interaction unit B7 is integrated into the mainboard B5.

[0108] Specifically, in the related art, the magnetic holding relay B2 is welded to the main board B5. The size of the main board B5 is relatively large. Due to the constraints of the installation space, the main board B5 can no longer integrate the human-computer interaction unit B7 or the communication unit B6. The communication unit B6 is separately arranged on the second circuit board, and the human-computer interaction unit B7 is separately arranged on the third circuit board, and the second circuit board and the third circuit board both need to be installed separately.

[0109] As before, in this application, since the magnetic latching relay B2 is removed from the main board B5, the installation surface of the main board B5 is saved. And the second group of wires B43 are located outside the main board B5, and there are no wires inside the main board B5. These two provide favorable conditions for the integration of the main board B5 with the communication unit B6 and the human-computer interaction unit B7.

[0110] Therefore, based on the capacitance compensation device provided in this embodiment, the main board B5 is integrated with the communication unit B6, or the main board B5 is integrated with the human-computer interaction unit B7, or the main board B5 is integrated with the communication unit B6 and the human-computer interaction unit B7, which simplifies the composition structure of the capacitance compensation device, makes assembly easier, and saves installation space to a certain extent.

[0111] Fig.10 for Fig. 9 The schematic diagram of the structure of the capacitor compensation device after adding a cover is shown. Fig.11 for Fig.10 Schematic diagram of the structure of the middle cover.

[0112] Please combine Fig. 9 , Fig.10 and Fig.11 In some embodiments of the present application, the cover B8 includes a first component B81 and a second component B82, wherein the first component B81 is disposed on the periphery of the magnetic latching relay B2 and the main board B5, and the main board B5 is fixedly installed by the first component B81. The second component B82 is located between the housing B11 and the circuit breaker B3, and the second component B82 supports the circuit breaker B3.

[0113] Specifically, the first component B81 is arranged on the periphery of the magnetic latching relay B2 and the main board B5, so that the cover B8 protects the magnetic latching relay B2, the main board B5 and the related connection circuits. In the present application, the main board B5 is also fixed by means of the first component B81 of the cover B8, which is conducive to simplifying the component structure of the capacitor compensation device and making the overall layout more reasonable.

[0114] The short circuit breaker itself has a protective shell. In the present application, the second component B82 is arranged between the shell B11 of the capacitor body B1 and the circuit breaker B3. In this way, the second component B82 can play a role in supporting the circuit breaker B3. In this way, the installation of the circuit breaker B3 is more stable, which helps to improve the working reliability of the circuit breaker B3.

[0115] In summary, the capacitor compensation device provided in the present application, through the structural setting of the cover B8, makes the cover B8 have multiple uses. It not only protects the main board B5 and the magnetic holding relay B2, but the cover B8 also has the function of installing and fixing the main board B5. In addition, it also plays a role in supporting the circuit breaker B3, which helps to improve the compactness and reliability of the structure of the capacitor compensation device.

[0116] Please combine Figure 3 , Fig. 9 and Fig.10In some embodiments of the present application, a support column B122 for supporting the circuit breaker B3 is also provided on the wiring base B12. The support column B122 passes through the second component B82 to support the circuit breaker B3 and is fixedly connected to the circuit breaker B3.

[0117] Please combine Figure 3 , Fig. 9 and Fig.10 The cover B8 is generally an injection molded part with limited supporting strength. In the present application, a supporting column B122 for supporting the circuit breaker B3 is provided on the terminal block B12. Thus, the circuit breaker B3 can be supported by the supporting column B122 to reduce the supporting burden of the second component B82 and enhance the overall reliability of the capacitor compensation device.

[0118] Please combine Figure 3 and Fig.10 In some embodiments of the present application, a screw hole B123 is provided on the side of the wiring base B12, and the cover B8 is fixedly connected to the wiring base B12 by screws.

[0119] The present application provides screw holes B123 on the side of the wiring base B12, so that the cover B8 is fixedly connected to the wiring base B12 by screws, which has the characteristics of simple structure and easy implementation.

[0120] As mentioned above, the magnetic latching capacitor is installed by using the terminal block B12. Thus, compared with setting the magnetic latching relay B2 on the main board B5, the number of magnetic latching relays B2 can be increased, and the number of capacitors in the capacitor body B1 can be increased. The capacitor compensation device provided by the present application can achieve 3 total.

[0121] Figure 8 It is also a wiring port diagram of the capacitor body in a 3-common capacitor compensation device provided in an embodiment of the present application, please refer to Figure 8 In some embodiments of the present application, there are three groups of wiring ports B121, and each group of wiring ports B121 includes 1 A-phase electrical wiring port B1211, 1 B-phase electrical wiring port B1212, and 1 C-phase electrical wiring port B1213. The A-phase electrical wiring port B1211, the B-phase electrical wiring port B1212, and the C-phase electrical wiring port B1213 in each group of wiring ports B121 are arranged in a triangle. The three A-phase electrical wiring ports B1211 in the three groups of wiring ports B121 are arranged in a straight line. The three B-phase electrical wiring ports B1212 are arranged in a straight line, the three C-phase electrical wiring ports B1213 are arranged in a straight line, and the three B-phase electrical wiring ports B1212 are arranged in a straight line.

[0122] Fig.12 for Figure 7 Please combine the bottom view of Figure 3 , Figure 7 , Figure 8 and Fig.12 There are three groups of connection ports B121, each group of connection ports B121 includes one A-phase electrical connection port B1211, one B-phase electrical connection port B1212 and one C-phase electrical connection port B1213. Correspondingly, there are three 3-phase common-compensation capacitors in the capacitor body B1. Each group of connection ports B121 is used to connect a 3-phase common-compensation capacitor.

[0123] Correspondingly, such as Figure 3 , Figure 7 , Figure 8 and Fig.12 As shown, a magnetic latching relay B2 can be provided at each A-phase electrical connection port B1211 and C-phase electrical connection port B1213, and the first contact extension B22 of each magnetic latching relay B2 can be electrically connected to the connection port B121 by means of a screw, and the second contact extension B21 of each magnetic latching relay B2 can be electrically connected to a same-phase output port of the circuit breaker B3 by means of a wire in the first group of wires B41. For example, the magnetic latching relay B2 at the A-phase electrical connection port B1211 is electrically connected to the A-phase electrical output port of the circuit breaker B3, and the magnetic latching relay B2 at the C-phase electrical connection port B1213 is electrically connected to the C-phase electrical output port of the circuit breaker B3.

[0124] like Figure 7 and Fig.12 As shown, the three B-phase electrical connection ports B1212 are arranged in a straight line and can be connected in series through a first conductive strip B46, and then connected to the B-phase electrical output port of the circuit breaker B3 through a conductor and a B-phase electrical conductive strip B422.

[0125] Based on the capacitance compensation device provided by this embodiment, there are three groups of wiring ports B121, and the A-phase electrical wiring port B1211, the B-phase electrical wiring port B1212 and the C-phase electrical wiring port B1213 in each group of wiring ports B121 are arranged in a triangle. The three A-phase electrical wiring ports B1211 in the three groups of wiring ports B121 are arranged in a straight line. The three B-phase electrical wiring ports B1212 are arranged in a straight line, the three C-phase electrical wiring ports B1213 are arranged in a straight line, and the three B-phase electrical wiring ports B1212 are arranged in a straight line. The wiring port B121 adopts this method, which is conducive to saving space, is conducive to the installation of the magnetic latching relay B2, and is conducive to realizing a three-common capacitance compensation device.

[0126] By using the capacitor compensation device provided in this application, 2 points can be achieved. Fig.13For the arrangement and wiring diagram of the magnetic latching relay in a 2-division capacitor compensation device provided in the embodiment of the present application, please refer to 13. The capacitor compensation device includes two division compensation capacitors, each division compensation capacitor is connected to three magnetic latching relays B2, which are respectively the magnetic latching relay B2 for conducting the A-phase electricity, the magnetic latching relay B2 for conducting the B-phase electricity, and the magnetic latching relay B2 for conducting the C-phase electricity. The magnetic latching relays B2 in the two division compensation capacitors are arranged in two columns, and the magnetic latching relays B2 in the same three-division compensation capacitor form a triangular arrangement. The capacitor compensation device also includes a second conductive strip B47, which is arranged between the two columns of magnetic latching relays B2, and the second conductive strip B47 is provided with two connection holes electrically connected to the N-phase electrical wiring port of the division compensation capacitor.

[0127] Need to explain, Fig.12 A magnetic latching relay B2 arrangement of a three-common capacitor compensation device is shown. Fig.13 A layout of the magnetic latching relay B2 of a two-part capacitor compensation device is provided. The above two structures are only one embodiment of the present application. In practical applications, the magnetic latching relay in the capacitor compensation device may also have other layouts.

[0128] It should also be noted that the structure of the capacitance compensation device provided in the present application can be applied not only to a three-combination capacitance compensation device and a two-division capacitance compensation device, but also to other forms of capacitance compensation devices.

[0129] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0130] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application is described in detail with reference to the above embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A capacitance compensation device, characterized in that: include: Capacitor body; The capacitor body comprises a shell, a capacitor and a wiring seat, wherein the capacitor is arranged in the shell, the wiring seat is arranged outside the shell, and a wiring port is arranged on the wiring seat, and the wiring port is electrically connected to the capacitor; A magnetic latching relay, the magnetic latching relay comprising a magnetic latching relay body and a first contact extension portion, the first contact extension portion being electrically connected to one of a stationary contact or a moving contact in the magnetic latching relay body, the first contact extension portion being exposed outside the magnetic latching relay body; The magnetic latching relay is located on a side of the wiring base away from the housing, is fixed to the wiring port through the first contact extension, and is electrically connected to the wiring port.

2. The capacitance compensation device according to claim 1, characterized in that: The first contact extension portion is provided with a connection hole, and the first contact extension portion is fixedly connected to the wiring port through a threaded fastener.

3. The capacitance compensation device according to claim 1, characterized in that: The capacitance compensation device comprises a circuit breaker, the circuit breaker is located at one end of the housing where the wiring seat is arranged, and the output port of the circuit breaker is close to the magnetic latching relay; The magnetic latching relay further includes a second contact extension portion, the second contact extension portion is electrically connected to the other of the stationary contact or the moving contact in the magnetic latching relay body, and the second contact extension portion is exposed outside the magnetic latching relay body; The second contact extension is connected to a conductive sheet through a first set of conductive wires, and the conductive sheet is electrically connected to the output port.

4. The capacitance compensation device according to claim 3, characterized in that: The capacitance compensation device comprises a main board, and the main board is located at an end of the magnetic latching relay away from the capacitor body; The mainboard is provided with a drive signal terminal, and the drive signal terminal is electrically connected to the coil terminal of the magnetic latching relay through a second group of wires; And / or, the mainboard is provided with a capacitor terminal voltage sampling signal terminal, and the capacitor terminal voltage sampling signal terminal is electrically connected to the first contact extension portion of the magnetic latching relay through a third group of wires; And / or, the mainboard is provided with a power supply voltage terminal, and the power supply voltage terminal is electrically connected to the conductive sheet through a fourth group of wires.

5. The capacitance compensation device according to claim 4, characterized in that: The capacitance compensation device further includes a communication unit, which is used for information exchange between different capacitance compensation devices, and the communication unit is integrated into the main board.

6. The capacitance compensation device according to claim 4, characterized in that: The capacitance compensation device further comprises a human-computer interaction unit, which is used for display and parameter setting, and is integrated into the mainboard.

7. The capacitance compensation device according to claim 4, 5 or 6, characterized in that: The capacitance compensation device also includes a cover; The housing comprises a first component and a second component, wherein the first component is arranged on the periphery of the magnetic latching relay and the main board, and the main board is fixedly installed by relying on the first component; The second component is located between the housing and the circuit breaker, and the second component supports the circuit breaker.

8. The capacitance compensation device according to claim 7, characterized in that: The wiring seat is also provided with a support column for supporting the circuit breaker; The supporting column passes through the second component to support the circuit breaker and is fixedly connected to the circuit breaker.

9. The capacitance compensation device according to claim 7, characterized in that: Screw holes are arranged on both sides of the wiring seat, and the cover shell is fixedly connected to the wiring seat by screws.

10. The capacitance compensation device according to claim 3, characterized in that: There are three groups of wiring ports, each group of wiring ports includes one A-phase electrical wiring port, one B-phase electrical wiring port and one C-phase electrical wiring port; The A-phase electrical wiring port, the B-phase electrical wiring port and the C-phase electrical wiring port in each group of wiring ports are arranged in a triangle; The three A-phase electrical wiring ports in the three groups of wiring ports are arranged in a straight line; the three B-phase electrical wiring ports are arranged in a straight line; and the three C-phase electrical wiring ports are arranged in a straight line.

Images