CN202586358U - Improved intelligent low-voltage reactive power compensation cabinet - Google Patents

Abstract

An improved low-voltage intelligent reactive power compensation cabinet, including a housing, an ammeter, a voltmeter, an intelligent reactive power controller, an isolating switch handle, a signal lamp, a fuse, a terminal block, a vertical busbar, a zinc oxide arrester, and a fuse device-type isolating switch, current transformer, multiple sets of intelligent integrated capacitors, busbar frame, insulator and horizontal busbar, all of which are respectively installed in the front door panel of the housing, the upper layer of the housing and the lower layer of the housing and are electrically connected. The lower end of the intelligent integrated power capacitor is also equipped with a 15×4mm ² PE row and an N row grounding device, and a fan is installed at the rear of the upper and lower layers of the housing. The utility model not only has the characteristics of low failure rate, convenient maintenance, cost saving and long service life, but also improves its safety and makes the internal connection more concise because it is connected with a 15×4mm ² PE/N copper bar grounding device. It is more convenient to network and run in the power system.

Description

Improved Low Voltage Intelligent Reactive Power Compensation Cabinet

technical field

The utility model relates to an improved low-voltage intelligent reactive power compensation cabinet, which belongs to the technical field of low-voltage reactive power compensation in electric power systems.

Background technique

With the rapid development and wide application of microelectronics technology, digital control technology, communication and network technology, the intelligent technology of low-voltage electrical appliances has developed rapidly, intelligent, integrated, networked, high reliability, availability, maintainability, Energy saving, environmental protection, and safety have become the mainstream of the development of smart appliances. The low-voltage intelligent reactive power compensation cabinet is a new generation of low-voltage intelligent electrical appliances based on the improvement and research of the overall development of intelligent electrical appliances. However, the grounding structure of the low-voltage intelligent reactive power compensation cabinets currently used is somewhat insufficient, which makes it inconvenient to connect internally.

Utility model content

The purpose of this utility model is to solve the above problems and provide an improved low-voltage intelligent reactive power system with more compact and concise structure, simple production, flexible combination, convenient maintenance, safer use, and can be used alone indoors to realize on-site compensation. compensation cabinet. The purpose of this utility model is achieved by the following scheme:

The improved low-voltage intelligent reactive power compensation cabinet described in the utility model includes a housing, an ammeter, a voltmeter, an intelligent reactive power controller, an isolating switch handle, a signal lamp, a fuse, a terminal block, a vertical busbar, and a zinc oxide arrester , fuse type isolating switch, current transformer, multiple sets of intelligent integrated power capacitors, busbar frame, insulator, horizontal busbar, PE row and N row, the casing is equipped with a skeleton and a front door panel, and the casing is divided into upper and lower layers. The ammeter, voltmeter, intelligent reactive power controller, isolating switch handle, and signal lamp are installed on the front door panel of the housing, and the vertical busbar, bus bar frame, zinc oxide arrester, fuse type isolating switch, Insulators, current transformers, intelligent integrated capacitors, fuses, terminals, PE row and N row are installed on the lower layer of the skeleton, and all devices are electrically connected. The incoming line end of the insulator is connected to the insulator at the same time, and the leads at the lower end of the insulator are respectively connected to ^each group of intelligent integrated power capacitors. Respectively offer an air vent at the rear, and a fan is installed at the air vent.

The advantages of adopting this technical improvement scheme are: while realizing the intelligent power compensation of the power system, it also has the characteristics of simple wiring, low failure rate, convenient maintenance, cost saving, and long service life. At the same time, because the intelligent integrated power capacitor of the utility model is connected with a 15×4mm ² PE/N copper bar grounding device, on the one hand, it can be used as a grounding device for the intelligent integrated power capacitor, improving the safety of the improved device of the compensation cabinet; on the other hand The upper and lower structures of the improved device of the intelligent reactive power compensation cabinet can be made more reasonable, and when the N line in the power distribution system enters from the lower end of the cabinet, the N row of the improved device of the compensation cabinet needs to be passed from the top to the top. The waste of lower copper bar material makes the internal connection of the improved device of the compensation cabinet more concise, and the network operation in the power system is more convenient.

Description of drawings

Fig. 1 is a structural schematic diagram of the improved low-voltage intelligent reactive power compensation cabinet described in the utility model;

In the figure: 1-shell, 2-nameplate, 3-ammeter, 4-voltmeter, 5-intelligent reactive power controller, 6-isolating switch handle, 7-signal light.

Fig. 2 is a schematic diagram of the improved low-voltage intelligent reactive power compensation cabinet described in the present invention after removing the front door panel of the housing;

In the figure: 8-fuse, 9-terminal, 10-vertical busbar, 11-zinc oxide arrester, 12-fuse type isolating switch, 13-current transformer, 14-intelligent integrated power capacitor.

Fig. 3 is a side view of the improved low-voltage intelligent reactive power compensation cabinet described in the utility model;

In the figure: 15-busbar frame, 16-insulator, 17-horizontal busbar, 18-PE row, 19-N row, 20-fan.

Detailed ways

The improved low-voltage intelligent reactive power compensation cabinet described in the utility model will be further described in detail below in conjunction with the accompanying drawings:

As shown in the figure, the improved low-voltage intelligent reactive power compensation cabinet described in the utility model includes a housing 1, an ammeter 3, a voltmeter 4, an intelligent reactive power controller 5, an isolating switch handle 6, a signal lamp 7, a fuse 8, terminal block 9, vertical busbar 10, zinc oxide arrester 11, fuse type isolating switch 12, current transformer 13, multiple sets of intelligent integrated capacitors 14, busbar frame 15, insulator 16, horizontal busbar 17, PE row 18 and N rows 19, the housing 1 is provided with a skeleton and a front door panel, and the housing part has two layers, the ammeter 3, the voltmeter 4, the intelligent reactive power controller 5, the isolating switch handle 6, the signal lamp 7 Installed on the front door panel of the housing 1, the upper layer of the housing is installed with the vertical busbar 10, the bus bar frame 15, the zinc oxide arrester 11, the fuse type isolating switch 12, the insulator 16, and the current transformer 13, and the lower layer of the housing is installed with the intelligent Integrated power capacitor 14, fuse 8, terminal 9, each device is electrically connected, wherein the incoming line end of the fuse type isolating switch 12 is connected to the vertical busbar 10, the outgoing line end is connected to the incoming line end of the current transformer 13, and at the same time connected to the The insulators 16 are connected, the leads at the lower ends of the insulators are respectively connected to each group of intelligent integrated power capacitors 14, and the lower ends of the intelligent integrated power capacitors are connected to the 15×4mm ² PE row 18 and N row 19 grounding devices, and a vent is opened at the rear of the upper and lower layers of the shell. A fan 20 is installed at the vent.

A nameplate 2 indicating the model parameters of the compensation device is installed on the surface of the front door panel of the housing 1 .

When the improved low-voltage intelligent reactive power compensation cabinet of the utility model is used, it is installed at the rear end of the power inlet cabinet on the low-voltage side of the transformer. The improved device of the compensation cabinet can select a number of intelligent capacitor connection cabinets with equivalent capacity according to the compensation capacity requirements. , to form a compensation system, which is convenient to realize local, decentralized and centralized automatic compensation functions, and can also meet the mixed compensation requirements of three-phase unbalanced occasions. It is suitable for industrial and mining enterprises, residential buildings and other low-voltage power distribution systems with a voltage of 380V and a three-phase AC frequency of 50Hz. It can improve the power factor of the power grid and reduce the loss of power distribution systems and transformers.

To sum up, the improved low-voltage intelligent reactive power compensation cabinet described in the utility model has the characteristics of self-adaptation, high precision, anti-harmonic, and no crash. Through the communication connection with the intelligent integrated capacitor, a new type of reactive power trend judgment algorithm is adopted, which is especially suitable for occasions where the power factor changes greatly. The number of actions is small and the control accuracy is greatly improved; the intelligent integrated capacitor adopts zero-crossing switching , Modern measurement and control, network communication, automation control and other advanced technologies have changed the backward mechanical contactor or mechatronics switch of the traditional reactive power compensation cabinet as the switching technology of switching capacitors and the bulky and heavy traditional reactive power compensation device. Structural defects, so that the new generation of low-voltage reactive power compensation equipment has the characteristics of better compensation effect, smaller size, lower power consumption, lower cost, more flexible use, more convenient maintenance, longer life and higher reliability. Meet the higher requirements of modern smart grid for power compensation.

Claims (2)

1. modified model low-voltage intelligent reactive power compensation cabinet; Comprise housing (1), ammeter (3), voltmeter (4), intelligent reactive power controller (5), isolating switch handle (6), signal lamp (7), fuse (8), binding post (9), perpendicular busbar (10), zinc oxide arrester (11), fuse disconnecting switch (12), current transformer (13), organize intelligent integrated capacitor (14), bus frame (15), insulator (16), horizontal busbar (17), PE row (18) and N row (19) more; Said housing (1) is provided with skeleton and front door; Housing parts is two-layer up and down; Said ammeter (3), voltmeter (4), intelligent reactive power controller (5), isolating switch handle (6), signal lamp (7) are installed on housing (1) front door; Said perpendicular busbar (10), bus frame (15), zinc oxide arrester (11), fuse disconnecting switch (12), insulator (16), current transformer (13) are installed in the housing upper strata; Intelligent integrated power capacitor (14), fuse (8), binding post (9) are installed by housing lower floor; Each device is electrically connected; Wherein the end of incoming cables of Fuse Type isolating switch (12) connects perpendicular busbar (10), and leading-out terminal is connected with the end of incoming cables of current transformer (13), and links to each other with insulator (16) simultaneously; Insulator lower end lead-in wire connects respectively respectively organizes intelligent integrated power capacitor (14), and it is characterized in that: intelligent integrated power capacitor (14) lower end is provided with 15 * 4mm ²PE row (18) and N row (19), a ventilating opening is respectively offered at housing levels rear portion, said ventilating opening place installation fan (20).

2. modified model low-voltage intelligent reactive power compensation cabinet as claimed in claim 1 is characterized in that: said housing (1) front door mounted on surface has the nameplate (2) of indicating this compensation arrangement model parameter.

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