Plug-and-play intelligent reactive power compensation device

Abstract

The utility model discloses a plug-and-play intelligent reactive power compensation device, and relates to the technical field of distribution transformers. The capacitor module comprises a plurality of capacitor modules, an assembly and a connector, the plurality of capacitor modules are assembled in the assembly, the capacitor modules are connected with the assembly through the connector, a guide groove is formed in the lower portion of the inner side of the assembly, the capacitor modules are movably inserted in the guide groove, and the connector is inserted in the guide groove. The connector assembly comprises four power supply terminals and two contact signals, and the capacitor module comprises a state display man-machine interaction part, a first fastener, a second fastener, a test interface terminal, a communication and current sampling interface and a molded case circuit breaker. And through the guide groove at the lower part of the inner side of the assembly, the capacitor module and the assembly are convenient to plug and unplug, so that the device is more convenient to operate and maintain, and plug-and-play can be realized.

Description

Technical Field

[0001] This utility model relates to the field of power distribution transformer technology, specifically a plug-and-play intelligent reactive power compensation device. Background Technology

[0002] A reactive power compensation device in a power distribution system is a device used to improve the power factor of the power grid, reduce losses, and improve power quality. By providing or absorbing reactive power, the device balances the reactive power demand in the power system, thereby maintaining voltage stability and reducing line and transformer losses.

[0003] Currently, most reactive power compensation devices in power distribution systems are composed of intelligent reactive power controllers, fuses (or molded case circuit breakers, etc.), switching switches (contactors or thyristor switches), capacitors, reactors, and other components connected in a complex configuration. Such reactive power compensation devices have complex structures and wiring, and are cumbersome to operate and maintain. Alternatively, they may consist of a single intelligent controller and multiple intelligent capacitors connected together. Neither of these two types of reactive power compensation devices is convenient to operate and maintain, nor can they achieve plug-and-play functionality. To address these issues, the inventor proposes a plug-and-play intelligent reactive power compensation device to solve these problems. Utility Model Content

[0004] To address the inconvenience of operation and maintenance of reactive power compensation devices and the inability to achieve plug-and-play functionality, the purpose of this utility model is to provide a plug-and-play intelligent reactive power compensation device.

[0005] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: a plug-and-play intelligent reactive power compensation device, including capacitor modules, components, and connectors. Multiple capacitor modules are assembled within the components. The capacitor modules and components are connected via connectors. A guide groove is provided on the lower inner side of the component, and the capacitor modules are movably inserted into the guide groove. The connectors include power terminals and contact signals. There are four power terminals and two contact signals. The capacitor module includes a status display human-machine interface, a first fastener, a second fastener, a test interface terminal, a communication and current sampling interface, and a molded case circuit breaker. Firstly, the guide groove on the lower inner side of the component facilitates the insertion and removal of the capacitor module and the component, achieving plug-and-play functionality. The capacitor module uses a microprocessor (MCU) to detect the two contact signals, and the four power terminals are connected to the system voltage to determine whether the capacitor module and the component are making good contact. The test interface terminal is mainly for customer and test station testing, and can detect capacitor capacitance, inrush current, and capacitor switching offset angle.

[0006] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0007] 1. The guide groove on the lower inner side of the component facilitates the insertion and removal of the capacitor module and the component, making the operation and maintenance of the device more convenient and enabling plug-and-play functionality;

[0008] 2. The microprocessor (MCU) detects two contact signals and connects the four power terminals to the system voltage to determine whether the capacitor module and components are making good contact.

[0009] 3. The test interface terminals are mainly for the convenience of customers and test stations. The capacitor capacity, inrush current and capacitor switching offset angle can be detected through the test terminals. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the component structure of this utility model;

[0013] Figure 3 This is a schematic diagram of the connector structure of this utility model;

[0014] Figure 4 This is a side view of the connector structure of this utility model;

[0015] Figure 5 This is a schematic diagram illustrating the principle structure of the three-phase and three-phase capacitor configuration of this utility model.

[0016] Figure 6 This is a schematic diagram illustrating the principle structure of an embodiment of the present invention, which combines three-phase and single-phase capacitors.

[0017] Figure 7 This is a schematic diagram illustrating the principle structure of the single-phase and single-phase capacitor configuration of this utility model.

[0018] In the diagram: 1. Capacitor module; 2. Component; 3. Status display human-machine interface; 4. First fastener; 5. Second fastener; 6. Test interface terminal; 7. Communication and current sampling interface; 8. Molded case circuit breaker; 9. Connector; 10. Power terminal; 11. Contact signal. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example: Figure 1-7 As shown, this utility model provides a plug-and-play intelligent reactive power compensation device, including a capacitor module 1, a component 2, and a connector 9. Multiple capacitor modules 1 are assembled within the component 2. The capacitor modules 1 and the component 2 are connected via the connector 9. A guide groove is provided on the lower inner side of the component 2, and the capacitor modules 1 are movably inserted into the guide groove. The connector 9 includes power terminals 10 and contact signals 11. There are four power terminals 10 and two contact signals 11. The capacitor module 1 comprises a status display human-machine interface 3, a first fastener 4, a second fastener 5, a test interface terminal 6, a communication and current sampling interface 7, and a molded case circuit breaker 8.

[0021] By adopting the above technical solution, the guide groove on the lower inner side of component 2 facilitates the insertion and removal of capacitor module 1 and component 2, realizing plug-and-play functionality. The capacitor module 1 detects two contact signals 11 through the microprocessor MCU, and the four power terminals 10 are connected to the system voltage to determine whether the capacitor module 1 and component 2 are in good contact. The test interface terminal 6 is mainly convenient for customers and test stations to test. The capacitor capacity, inrush current and capacitor switching offset angle can be detected through the test terminal.

[0022] There are three forms of capacitor module 1: capacitor module 1 composed of three-phase and three-phase capacitors, capacitor module 1 composed of a mixture of three-phase and single-phase capacitors, and capacitor module 1 composed of single-phase and single-phase capacitors.

[0023] The following example uses capacitor module 1, which is a combination of three-phase and single-phase capacitors:

[0024] The capacitor module 1 comprises external power supply terminals (UA, UB, UC, UN), a current input interface, a contact signal input interface, a status display human-machine interface, a current transformer TA, a molded case switch QF, a microprocessor MCU, an actuator KD, communication interfaces 485A and 485B, a three-phase capacitor C3, a single-phase capacitor C4, and an internal capacitor temperature sensor RT. The actuator KD consists of a magnetic latching relay, a zero-crossing detection circuit, and a drive circuit. The communication and current sampling interface 7 includes a 4-core current sampling line and two RS485 communication channels: one RS485 communication channel for communication between capacitor modules 1, and one RS485 communication channel for uplink communication (communication with backend or distribution convergence terminals, etc.). The external power supply terminals (UA, UB, UC, UN) and the contact signal input interface are included in connector 9. The current transformer TA is used for three-phase current measurement of the capacitors, serving as overcurrent and attenuation protection. The temperature sensor RT measures the internal temperature of the capacitor, serving as over-temperature protection for capacitor operation.

[0025] Working principle: First, the guide groove on the lower inner side of component 2 facilitates the insertion and removal of capacitor module 1 and component 2, achieving plug-and-play functionality. The capacitor module 1 detects two contact signals 11 through the microprocessor MCU, and the four power terminals 10 are connected to the system voltage to determine whether the capacitor module 1 and component 2 are in good contact. The test interface terminal 6 is mainly convenient for customers and test stations to test. The capacitor capacitance, inrush current, and capacitor switching offset angle can be detected through the test terminal.

[0026] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0027] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A plug-and-play intelligent reactive power compensation device, comprising a capacitor module (1), components (2), and connectors (9), characterized in that: The number of capacitor modules (1) is multiple, and the multiple capacitor modules (1) are assembled in the component (2). The capacitor modules (1) and the component (2) are connected by connectors (9). A guide groove is provided on the lower inner side of the component (2), and the capacitor modules (1) are movably inserted into the guide groove.

2. The plug-and-play intelligent reactive power compensation device as described in claim 1, characterized in that, The connector (9) includes power terminals (10) and contact signals (11), with four power terminals (10) and two contact signals (11).

3. The plug-and-play intelligent reactive power compensation device as described in claim 1, characterized in that, The capacitor module (1) consists of a status display human-machine interface (3), a first fastener (4), a second fastener (5), a test interface terminal (6), a communication and current sampling interface (7), and a molded case circuit breaker (8).

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