Cabinet type automatic reactive power compensation device

Abstract

The utility model belongs to the technical field of power equipment, and discloses a cabinet type automatic reactive power compensation device, which comprises a wire inlet cabinet, a switching cabinet, a reactance cabinet and a compensation cabinet which are spliced. A primary wire inlet cable is arranged in the wire inlet cabinet, an independent wire inlet cabinet secondary chamber is arranged at the top of the wire inlet cabinet, and a high-voltage intelligent controller is arranged in the wire inlet cabinet secondary chamber; a fling-cut switch, a protection CT and an isolation disconnecting link which are connected in series are arranged in the fling-cut cabinet, the fling-cut switch is electrically connected with the primary incoming cable, and the fling-cut switch and the protection CT are electrically connected to the high-voltage intelligent controller; a reactor and a lightning arrester which are connected in series are arranged in the reactance cabinet, and the reactor is electrically connected with the isolation switch; and a plurality of capacitors are arranged in the compensation cabinet and are electrically connected with the lightning arrester. According to the cabinet type automatic reactive power compensation device, electrical elements with different functions are integrated in different cabinet bodies, so that the size of a single cabinet body is small, transportation and installation are convenient, the maintenance difficulty is low, and the maintenance efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power equipment, in particular to a cabinet-type automatic reactive power compensation device. Background Art

[0002] Reactive power compensation, referred to as reactive compensation, plays a role in improving the power factor of the power grid, reducing the loss of power supply transformers and transmission lines, improving power supply efficiency, and improving the power supply environment in electronic power supply systems. Therefore, reactive power compensation devices are crucial in power supply systems.

[0003] A reactive power compensation cabinet is an integrated reactive power compensation device with a compact structure. Traditional reactive power compensation cabinets integrate electrical components such as incoming cables, switching switches, disconnectors, reactors, and capacitors into a single cabinet. This results in a large cabinet, making it difficult to transport and install on-site. The large number of electrical components within the cabinet makes it difficult for maintenance personnel to quickly locate the components requiring repair, resulting in low maintenance efficiency. Furthermore, the limited size of the cabinet doors makes it difficult for multiple maintenance personnel to work together, which further complicates maintenance and reduces efficiency.

[0004] Therefore, it is urgent to propose a cabinet-type automatic reactive power compensation device to solve the above technical problems. Utility Model Content

[0005] The utility model provides a cabinet-type automatic reactive power compensation device, which integrates electrical components with different functions in different cabinets, and splices multiple cabinets to form the cabinet-type automatic reactive power compensation device, so that the volume of a single cabinet is small, the convenience of transportation is improved, the difficulty of on-site installation is reduced, and the joint work of multiple maintenance personnel can be realized, which reduces the difficulty of maintenance and improves the maintenance efficiency.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] Cabinet-type automatic reactive power compensation device, including:

[0008] An incoming line cabinet, wherein a primary incoming line cable is provided in the incoming line cabinet, an independent incoming line cabinet secondary chamber is provided on the top of the incoming line cabinet, and a high-voltage intelligent controller is provided in the incoming line cabinet secondary chamber;

[0009] A switching cabinet, wherein a switching switch, a protection CT and an isolating switch are sequentially connected in series, the switching switch is electrically connected to the primary incoming cable, and the switching switch and the protection CT are both electrically connected to the high-voltage intelligent controller;

[0010] A reactor cabinet, wherein a reactor and a lightning arrester are provided in series, and the reactor is electrically connected to the isolation switch;

[0011] A compensation cabinet, wherein a plurality of capacitors are provided in the compensation cabinet and the capacitors are electrically connected to the arrester;

[0012] Wherein, the incoming line cabinet, the switching cabinet, the reactor cabinet and the compensation cabinet are spliced ​​together.

[0013] Optionally, the plurality of capacitors form three capacitor groups connected in parallel, and a discharge device is correspondingly provided for two adjacent capacitor groups.

[0014] Optionally, one switching cabinet, one reactor cabinet and one compensation cabinet form a reactive compensation module, and there are multiple reactive compensation modules. The multiple reactive compensation modules are spliced ​​with the incoming line cabinet to form multiple groups of equal-capacity or unequal-capacity branches.

[0015] Optionally, the cabinet-type automatic reactive power compensation device also includes a hard busbar, which is passed through the upper part of the incoming line cabinet, the switching cabinet, the reactor cabinet and the compensation cabinet. The hard busbar is located at the end of the incoming line cabinet and is bent and connected to the primary incoming cable.

[0016] Optionally, a sensor is provided on the portion of the hard busbar located in the incoming line cabinet; and / or insulators are provided between the hard busbar and the incoming line cabinet, the switching cabinet, the reactance cabinet and the compensation cabinet.

[0017] Optionally, a live display is provided in the secondary chamber of the incoming line cabinet, and the live display is used to display whether the incoming line side of the hard busbar is energized; and / or, a voltmeter is provided in the secondary chamber of the incoming line cabinet, and the voltmeter is used to display the voltage of the hard busbar.

[0018] Optionally, the switching switch, the protection CT, the isolating switch, the reactor, the lightning arrester and the capacitor are connected in series via a hard conductive bar, and the output terminal of the capacitor is provided with a flexible connecting wire.

[0019] Optionally, the door of the incoming line cabinet is provided with at least one of a lighting lamp, an electromagnetic lock and a limit switch; and / or, the door of the switching cabinet is provided with at least one of a lighting lamp, an electromagnetic lock and a limit switch; and / or, the door of the reactance cabinet is provided with at least one of a lighting lamp, an electromagnetic lock and a limit switch; and / or, the door of the compensation cabinet is provided with at least one of a lighting lamp, an electromagnetic lock and a limit switch.

[0020] Optionally, an independent switching cabinet secondary chamber is provided on the top of the switching cabinet, and a manual / automatic transfer switch, an ammeter and an opening and closing button are provided in the switching cabinet secondary chamber.

[0021] Optionally, a capacitor-specific microcomputer protection unit is further provided in the secondary chamber of the switching cabinet.

[0022] Beneficial effects of the utility model:

[0023] The utility model provides a cabinet-type automatic reactive power compensation device, comprising a spliced ​​incoming line cabinet, a switching cabinet, a reactor cabinet, and a compensation cabinet. The incoming line cabinet is equipped with a primary incoming line cable, the switching cabinet is equipped with a switching switch, a protective CT, and an isolating switch, the reactor cabinet is equipped with a reactor and a lightning arrester, and the compensation cabinet is equipped with multiple capacitors. This solution, by integrating electrical components with different functions into different cabinets and splicing multiple cabinets to form a complete set of cabinets, makes the volume of a single cabinet smaller and easier to transport separately. In addition, the electrical components in the incoming line cabinet, switching cabinet, reactor cabinet, and compensation cabinet are assembled in the factory, reducing on-site installation and commissioning time and reducing installation difficulty.

[0024] During maintenance, the electrical components to be repaired can be quickly found by opening the corresponding cabinet. Moreover, when electrical components in different cabinets all need to be repaired, multiple maintenance personnel can work together, which reduces the difficulty of maintenance and improves maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0026] Figure 1 This is a structural diagram of a cabinet-type automatic reactive power compensation device provided by an embodiment of the present utility model;

[0027] Figure 2 yes Figure 1 Enlarged view at point A;

[0028] Figure 3 This is a front view of the internal structure of the cabinet-type automatic reactive power compensation device provided by an embodiment of the utility model;

[0029] Figure 4 This is a top view of the internal structure of the cabinet-type automatic reactive power compensation device provided by an embodiment of the utility model;

[0030] Figure 5 This is a circuit diagram of a cabinet-type automatic reactive power compensation device provided by an embodiment of the utility model.

[0031] In the picture:

[0032] 100. Incoming line cabinet; 110. Primary incoming line cable; 120. Incoming line cabinet secondary compartment; 121. High-voltage intelligent controller; 122. Live display; 123. Voltmeter;

[0033] 200, switching cabinet; 210, switching switch; 220, protection CT; 230, isolating switch; 240, switching cabinet secondary compartment; 241, manual / automatic transfer switch; 242, ammeter; 243, opening and closing pushbuttons; 244, capacitor-specific microcomputer protection unit;

[0034] 300, Reactor cabinet; 310, Reactor; 320, Lightning arrester;

[0035] 400, compensation cabinet; 410, capacitor bank; 411, capacitor; 420, discharge device;

[0036] 500, hard busbar; 600, sensor; 700, insulator; 800, electromagnetic lock. DETAILED DESCRIPTION

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0038] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0039] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0040] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0041] This embodiment provides a cabinet-type automatic reactive power compensation device, which integrates electrical components with different functions in different cabinets, and splices multiple cabinets to form the cabinet-type automatic reactive power compensation device, so that the volume of a single cabinet is smaller, which improves the convenience of transportation and reduces the difficulty of on-site installation. In addition, it can realize the joint work of multiple maintenance personnel, reduce the difficulty of maintenance, and improve maintenance efficiency.

[0042] Specifically, if Figure 1-Figure 3 As shown, the cabinet-type automatic reactive power compensation device includes a spliced ​​incoming line cabinet 100, a switching cabinet 200, a reactor cabinet 300 and a compensation cabinet 400.

[0043] The incoming line cabinet 100 is equipped with a primary incoming line cable 110. An independent incoming line cabinet secondary chamber 120 is located on top of the incoming line cabinet 100, and a high-voltage intelligent controller 121 is housed within the incoming line cabinet secondary chamber 120. The switching cabinet 200 is equipped with a switching switch 210, a protection CT 220, and an isolating switch 230 connected in series. The switching switch 210 is electrically connected to the primary incoming line cable 110, and both the switching switch 210 and the protection CT 220 are electrically connected to the high-voltage intelligent controller 121. The reactor cabinet 300 is equipped with a reactor 310 and a lightning arrester 320 connected in series. The reactor 310 is electrically connected to the isolating switch 230. The compensation cabinet 400 is equipped with multiple capacitors 411, which are electrically connected to the lightning arrester 320.

[0044] The cabinet-type automatic reactive power compensation device integrates electrical components used for reactive power compensation, such as the primary incoming cable 110, the switching switch 210, the protection CT 220, the isolating switch 230, the reactor 310, the lightning arrester 320 and the capacitor 411, into the corresponding incoming cabinet 100, the switching cabinet 200, the reactor cabinet 300 and the compensation cabinet 400 according to their functions, and then forms a cabinet-type automatic reactive power compensation device by splicing. Compared with the integrated cabinet in the prior art, the volume of a single cabinet is smaller and convenient for separate transportation. In addition, the electrical components in the incoming cabinet 100, the switching cabinet 200, the reactor cabinet 300 and the compensation cabinet 400 are assembled in the factory, which reduces the on-site installation and commissioning time and reduces the installation difficulty.

[0045] Since electrical components with different functions are integrated into different cabinets, when maintenance is required, one can first find the corresponding cabinet, then open the cabinet to find the electrical component to be repaired. For example, if the electrical component to be repaired is the isolation switch 230, one can first find the switching cabinet 200, then open the switching cabinet 200 to find the isolation switch 230. Since the number of electrical components inside the switching cabinet 200 is much smaller than that of the integrated cabinet in the prior art, the difficulty of finding the isolation switch 230 is greatly reduced, that is, the efficiency of maintenance can be improved. Moreover, when electrical components in different cabinets all need to be repaired, such as the isolation switch in the switching cabinet 200 and the reactor 310 in the reactor cabinet 300, two maintenance personnel can perform the maintenance work together, and the working space is not controlled, which reduces the difficulty of maintenance and saves maintenance time.

[0046] The high-voltage intelligent controller 121 in this cabinet-type automatic reactive power compensation device features dual main transformer, dual busbar, and bus-tie sampling capabilities. It intelligently identifies the voltage on the low-voltage side of the dual main transformers, the bus-tie position, the power factor, and the inductive reactive power demand. Taking into account voltage fluctuations and inductive reactive power shortages, it rationally controls inductive reactive power input to balance reactive power supply and demand in the grid. Furthermore, it provides protection for overvoltage, undervoltage, overcurrent, and quick-break, and, together with the protection CT220 and lightning arrester 320, forms a comprehensive branch circuit protection system.

[0047] Optionally, in this embodiment, a first partition is provided above the incoming cabinet 100. The primary incoming cable 110 is placed below the first partition, and the incoming cabinet secondary chamber 120 is located above the first partition. The provision of the first partition forms an independent incoming cabinet secondary chamber 120, resulting in a simple structure and ease of processing. Furthermore, the incoming cabinet secondary chamber 120 is integrated within the incoming cabinet 100, facilitating transportation and installation.

[0048] Optionally, the first partition may be installed in the incoming line cabinet 100 by welding, and the welding process is simple and easy to process.

[0049] Further, if Figure 4 As shown, multiple capacitors 411 form three parallel capacitor banks 410, with a discharge device 420 installed for each adjacent capacitor bank 410. The discharge device 420 allows for the discharge of excess power, improving the operational safety of the cabinet-type automatic reactive power compensation device. Furthermore, the arrangement of two capacitor banks 411 sharing a single discharge device 420 reduces the number of discharge devices 420 used while still meeting discharge requirements. This reduces component costs, minimizes space usage, and enhances the compactness of the compensation cabinet 400.

[0050] Further, see Figure 1 、 Figure 3 and Figure 4A switching cabinet 200, a reactor cabinet 300, and a compensation cabinet 400 form a reactive power compensation module. Multiple reactive power compensation modules are provided. Multiple reactive power compensation modules are connected to the incoming line cabinet 100 to form multiple groups of equal-capacity or unequal-capacity branches. This configuration can achieve multi-level capacity regulation.

[0051] Further, see Figure 3 The cabinet-type automatic reactive power compensation device also includes a rigid busbar 500, which is installed above the incoming cabinet 100, the switching cabinet 200, the reactor cabinet 300, and the compensation cabinet 400. The rigid busbar 500 is bent at the end of the incoming cabinet 100 and connected to the primary incoming cable 110. This arrangement facilitates installation and maintenance.

[0052] Optionally, continue with Figure 3 A sensor 600 is provided on the portion of the hard busbar 500 located in the incoming cabinet 100 , and the sensor 600 is used to sense voltage.

[0053] Optionally, continue with Figure 3 Insulators 700 are installed between the rigid busbar 500 and the incoming line cabinet 100, switching cabinet 200, reactor cabinet 300, and compensation cabinet 400. The insulators 700 ensure insulation between the rigid busbar 500 and the incoming line cabinet 100, switching cabinet 200, reactor cabinet 300, and compensation cabinet 400, thereby improving the operational safety of the cabinet-type automatic reactive power compensation device.

[0054] Optionally, continue with Figure 2 A live display 122 is also provided in the secondary chamber 120 of the incoming line cabinet. The live display 122 is used to display whether the incoming line side of the hard busbar 500 is energized.

[0055] Optionally, continue with Figure 2 A voltmeter 123 is also provided in the secondary chamber 120 of the incoming line cabinet, and the voltmeter 123 is used to display the voltage of the hard busbar 500.

[0056] Optionally, in this embodiment, the switching switch 210, protective CT 220, disconnector 230, reactor 310, lightning arrester 320, and capacitor 411 are connected in series via a rigid conductive bar. This rigid conductive bar offers high structural strength and facilitates installation and maintenance. Furthermore, a flexible connecting wire is provided at the output terminal of capacitor 411. In this embodiment, capacitor 411 is electrically connected to discharge device 420 via this flexible connecting wire. This flexible connecting wire has high adaptability and can be flexibly adjusted to suit the space, providing greater installation flexibility.

[0057] Optionally, the door of the incoming cabinet 100 is equipped with at least one of a lighting fixture (not shown), an electromagnetic lock 800, and a limit switch (not shown). The lighting fixture provides illumination for maintenance personnel, facilitating repairs. The electromagnetic lock 800 and the limit switch provide a five-protection electrical lockout, ensuring the cabinet door remains securely closed when maintenance is not required, preventing others from accessing the electrical components within the cabinet.

[0058] Optionally, the door of the switching cabinet 200 is provided with at least one of a lighting lamp, an electromagnetic lock 800 and a travel switch.

[0059] Optionally, the cabinet door of the reactor cabinet 300 is provided with at least one of an illumination lamp, an electromagnetic lock 800 and a travel switch.

[0060] Optionally, the cabinet door of the compensation cabinet 400 is provided with at least one of an illumination lamp, an electromagnetic lock 800 and a travel switch.

[0061] Further, see Figure 2 The top of the switch cabinet 200 is equipped with an independent secondary chamber 240, which houses a manual / automatic transfer switch 241, an ammeter 242, and a switch-on / off button 243. The manual / automatic transfer switch 241 is used to switch between manual and automatic reactive power, offering flexible operation, simple control, and safety and reliability. The ammeter 242 displays the current in each branch.

[0062] Optionally, in this embodiment, a second partition is provided above the switching cabinet 200. The switching switch 210, protective CT 220, and isolating switch 230 are located below the second partition, and the switching cabinet secondary chamber 240 is located above the second partition. The provision of the second partition forms an independent switching cabinet secondary chamber 240, resulting in a simple structure and ease of fabrication. Furthermore, the switching cabinet secondary chamber 240 is integrated within the switching cabinet 200, facilitating transportation and installation.

[0063] Optionally, the second partition may be installed in the switching cabinet 200 by welding, and the welding process is simple and easy to process.

[0064] Optionally, an indicator light is further provided in the secondary chamber 240 of the switching cabinet to indicate the working status of each electrical component.

[0065] Further, see Figure 2 A capacitor-specific microcomputer protection unit 244 is also provided in the secondary chamber 240 of the switching cabinet for protecting the capacitor 411.

[0066] Further, if Figure 5As shown, the specific control method for achieving reactive power demand through high-voltage intelligent controller 121 is as follows: the main transformer low-voltage side current sampling signal is input into high-voltage intelligent controller 121, the busbar PT voltage sampling signal is input into high-voltage intelligent controller 121, and the switching status of each switching switch 210 is input into high-voltage intelligent controller 121. High-voltage intelligent controller 121 uses the collected data to perform precise calculations, using the main transformer low-voltage side voltage, power factor, and reactive power demand as control targets. Taking voltage fluctuations and reactive power shortages into consideration, it rationally controls reactive power input to ensure a balanced supply and demand of reactive power in the power grid. Furthermore, high-voltage intelligent controller 121 has comprehensive protection functions, including overvoltage, undervoltage, overcurrent, quick trip, and open-delta voltage protection.

[0067] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Cabinet type automatic reactive power compensation device, characterized in that: include: An incoming line cabinet (100), wherein a primary incoming line cable (110) is provided in the incoming line cabinet (100), an independent incoming line cabinet secondary chamber (120) is provided on the top of the incoming line cabinet (100), and a high-voltage intelligent controller (121) is provided in the incoming line cabinet secondary chamber (120); A switching cabinet (200), wherein a switching switch (210), a protection CT (220), and an isolating switch (230) are sequentially connected in series, the switching switch (210) is electrically connected to the primary incoming cable (110), and the switching switch (210) and the protection CT (220) are both electrically connected to the high-voltage intelligent controller (121); A reactor cabinet (300), wherein a reactor (310) and a lightning arrester (320) connected in series are provided in the reactor cabinet (300), and the reactor (310) is electrically connected to the isolation switch (230); A compensation cabinet (400), wherein a plurality of capacitors (411) are provided in the compensation cabinet (400), and the capacitors (411) are electrically connected to the lightning arrester (320); The incoming line cabinet (100), the switching cabinet (200), the reactor cabinet (300) and the compensation cabinet (400) are spliced ​​together.

2. The cabinet-type automatic reactive power compensation device according to claim 1, characterized in that: The plurality of capacitors (411) form three capacitor groups (410) arranged in parallel, and a discharge device (420) is correspondingly provided for two adjacent capacitor groups (410).

3. The cabinet-type automatic reactive power compensation device according to claim 1, characterized in that: A switching cabinet (200), a reactor cabinet (300) and a compensation cabinet (400) form a reactive compensation module. A plurality of reactive compensation modules are provided. The plurality of reactive compensation modules and the incoming line cabinet (100) are spliced ​​to form a plurality of equal-capacity or unequal-capacity branches.

4. The cabinet-type automatic reactive power compensation device according to claim 1, characterized in that: The cabinet-type automatic reactive power compensation device further comprises a hard busbar (500), the hard busbar (500) being arranged through the upper portion of the incoming line cabinet (100), the switching cabinet (200), the reactance cabinet (300) and the compensation cabinet (400), and the hard busbar (500) being connected to the primary incoming line cable (110) after being bent at the end portion of the incoming line cabinet (100).

5. The cabinet-type automatic reactive power compensation device according to claim 4, characterized in that: A sensor (600) is provided on the portion of the hard busbar (500) located in the incoming line cabinet (100); and / or insulators (700) are provided between the hard busbar (500) and the incoming line cabinet (100), the switching cabinet (200), the reactance cabinet (300), and the compensation cabinet (400).

6. The cabinet-type automatic reactive power compensation device according to claim 4, characterized in that: A live display (122) is further provided in the secondary chamber (120) of the incoming line cabinet, and the live display (122) is used to display whether the incoming line side of the hard busbar (500) is live; and / or a voltmeter (123) is further provided in the secondary chamber (120) of the incoming line cabinet, and the voltmeter (123) is used to display the voltage of the hard busbar (500).

7. The cabinet-type automatic reactive power compensation device according to claim 1, characterized in that: The switching switch (210), the protection CT (220), the isolating switch (230), the reactor (310), the lightning arrester (320) and the capacitor (411) are connected in series via a hard conductive bus, and a flexible connecting wire is provided at the output end of the capacitor (411).

8. The cabinet-type automatic reactive power compensation device according to claim 1, characterized in that: The cabinet door of the incoming line cabinet (100) is provided with at least one of a lighting lamp, an electromagnetic lock (800) and a travel switch; And / or, the cabinet door of the switching cabinet (200) is provided with at least one of a lighting lamp, an electromagnetic lock (800) and a travel switch; And / or, the cabinet door of the reactor cabinet (300) is provided with at least one of a lighting lamp, an electromagnetic lock (800) and a travel switch; And / or, the cabinet door of the compensation cabinet (400) is provided with at least one of a lighting lamp, an electromagnetic lock (800) and a travel switch.

9. The cabinet-type automatic reactive power compensation device according to any one of claims 1 to 8, characterized in that: An independent switching cabinet secondary chamber (240) is provided on the top of the switching cabinet (200), and a manual / automatic transfer switch (241), an ammeter (242) and an opening and closing button (243) are provided in the switching cabinet secondary chamber (240).

10. The cabinet-type automatic reactive power compensation device according to claim 9, characterized in that: A capacitor-specific microcomputer protection unit (244) is also provided in the secondary chamber (240) of the switching cabinet.

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