CN205123368U - Portable emergent direct current charging device - Google Patents

Abstract

The utility model discloses a portable emergency DC charging device, which is characterized in that a voltage monitoring unit (2) and a control protection unit (3) are arranged on the upper end of the box body (1), and the front panel of the box body (1) is provided with DC output switch (5), AC input switch (7), DC master switch (8) and display lights, three rectification and charging modules (4), input terminal block (9), output Terminal block (12), input cable hole (10), output cable hole (13), grounding terminal (11); AC input cable (14) passes through the input cable hole (10) and enters the input terminal block (9) connected, the DC output cable (15) penetrates through the output cable hole (13) and connects with the output terminal block (12). DC output shortens power outage time, ensures power supply reliability, improves work efficiency, and reduces transformation costs.

Description

A portable emergency DC charging device

Technical field:

The utility model relates to a portable emergency direct-current charging device, which is widely used in emergency repair of direct current power system faults in substations and transformation of secondary screens in substations, and belongs to the field technical field of substation maintenance.

Background technique:

The DC system of the substation is an important part of the secondary system of the substation, providing DC power for primary equipment operation and secondary automation device operation. The DC system rectifies the AC power of the station transformer into DC through the charging module to charge the battery pack and directly supply the DC load. When the power supply of the station is cut off, the battery pack continues to provide DC power, which greatly improves the reliability of the DC power supply of various equipment; at the same time It can also provide AC power for the UPS inverter system to ensure a continuous and stable supply of AC power and ensure the normal operation of equipment in the substation.

The DC system usually consists of a battery panel and a DC charging panel, and is mainly composed of a rectifier charging module system, a battery pack system, a monitoring system, an insulation monitoring unit, an AC output unit, and a DC output unit. Its core component is the rectifier charging module, which is the heart of the DC system. However, this module is prone to lightning current burning accidents in actual operation, and the faults cannot be repaired on site. It often takes a day or even a few days to match suitable spare parts or contact the manufacturer for replacement, which will directly affect the safe and stable operation of the entire substation. Reliable power supply leaves great hidden dangers.

On the other hand, in the secondary system transformation process of the substation, in order not to lose the DC power supply of the substation, the old DC screen and DC feeder are usually not removed first, and the old screen is removed after the new DC screen is installed and connected to the DC load. As a result, the old screen occupies the construction space, and the old and new secondary cables are intertwined, which brings inconvenience to the renovation work and seriously affects the work efficiency and construction period.

Utility model content:

The purpose of the utility model is to overcome the shortcomings of the above-mentioned existing technology and provide a simple structure, easy to carry, wide application range, which can replace different types of rectifier and charging modules, provide stable DC output, shorten power failure time, and ensure power supply reliability. Portable emergency DC charging unit that increases productivity and reduces retrofit costs.

The purpose of this utility model can be achieved through the following measures: a portable emergency DC charging device, which includes a box, is characterized in that the upper end of the box is provided with a voltage monitoring unit, a control and protection unit, and the front panel of the box is provided with DC output switch, AC input switch, DC main switch, DC output indicator light, AC input indicator light, charged indicator light, there are 3 rectifier charging modules, input terminal block, output terminal block, and input cable hole in the box , output cable hole, and grounding terminal; the rectifier charging module is connected to the voltage monitoring unit, control protection unit, AC input switch, and DC main switch; DC output display lamp, AC input switch connected to input terminal block, AC input cable penetrated through input cable hole and connected to input terminal block, DC main switch connected to DC output switch, DC output switch connected to output terminal block, DC output cable Pass through the output cable hole and connect with the output terminal block.

Compared with the prior art, the utility model can produce the following positive effects: the utility model can timely and effectively solve the problem that the substation cannot operate normally and stably due to the failure of the rectifier charging module in the DC system and the space occupied by the old screen in the secondary system transformation Inconvenient construction, especially the large-scale power outage where the substation was completely shut down due to the inability to find replacement modules in a short time.

which has:

1. Simple structure and easy to carry. The whole device is an integrated design. There are four universal wheels at the bottom of the box. There are output and input terminal blocks inside, which are easy to move and simple to connect.

2. Wide range of application. It can be used for different types of rectifying and charging modules, and can effectively solve various faults.

3. Shorten the power outage time and ensure the reliability of power supply. After a failure occurs, the emergency DC charging device can be directly connected without waiting for the manufacturer to arrive at the scene.

4. Reduce business costs. Used in substation secondary system renovation projects, it can significantly shorten the construction period, improve work efficiency and reduce renovation costs.

Description of drawings:

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a schematic diagram of the internal structure of the utility model;

Fig. 3 is the electrical principle block diagram of the utility model.

detailed description;

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described in detail:

Embodiment: A portable emergency DC charging device (see Figure 1-Figure 3), which includes a box body 1 with universal wheels, a voltage monitoring unit 2 and a control and protection unit 3 are installed on the upper end of the box body 1, and the box body The front panel of 1 is provided with DC output switch 5, AC input switch 7, DC main switch 8, DC output indicator 6, AC input indicator 16, charged indicator 17, and there are 3 rectification and charging modules in the box 1 4. Input terminal block 9, output terminal block 12, input cable hole 10, output cable hole 13, grounding terminal 11; rectifier charging module 4 is respectively connected to voltage monitoring unit 2, control protection unit 3, AC input switch 7, DC The main switch 8; the AC input switch 7 is connected to the AC input display lamp 16, the DC main switch 8 is connected to the charged display lamp 17, the DC output switch 5 is connected to the DC output display lamp 6, the AC input switch 7 is connected to the input terminal block 9, and the AC input cable 14 penetrates through the input cable hole 10 and is connected to the input terminal block 9, the DC main switch 8 is connected to the DC output switch 5, and the DC output switch 5 is connected to the output terminal block 12, and the DC output cable 15 is penetrated and output through the output cable hole 13 The terminal blocks 12 are connected to each other.

The AC input cable 14 penetrates through the input cable hole 10 and is connected to the input terminal block 9, and the input terminal block 9 is connected to the rectification and charging module 4 through the AC input switch 7; after being controlled and processed by the voltage monitoring unit 2 and the control protection unit 3 , the rectifier charging module 4 outputs the DC power to the DC output switch 5 through the DC main switch 8, and then connects the output terminal block 12 to connect the DC output cable 15 to output through the cable hole 13, and the display lamps are respectively connected to each switch as a live indication.

The rectifier charging module 4 adopts AC380V input, DC220V, 10A output; the voltage monitoring unit 2 is composed of Powersun-M3S DC monitoring device, which can monitor and adjust the output voltage; the control protection unit 3 has overvoltage, undervoltage, overcurrent, output Functional protection functions such as short circuit protection, anti-reverse connection protection and overheating protection have achieved the function of providing continuous and stable DC output. When working, it is only necessary to connect the AC input cable 14 and the DC output cable 15 to the external power supply and equipment respectively, and at the same time connect the ground terminal 11 to the ground in the station.

Claims (1)

1. A portable emergency DC charging device, which includes a box (1), characterized in that the upper end of the box (1) is equipped with a voltage monitoring unit (2), a control protection unit (3), and the box (1) The front panel is equipped with DC output switch (5), AC input switch (7), DC main switch (8), DC output indicator light (6), AC input indicator light (16), live indicator light (17), box The body (1) is provided with 3 rectifier charging modules (4), input terminal blocks (9), output terminal blocks (12), input cable holes (10), output cable holes (13), grounding terminals (11 ); the rectifier charging module (4) is respectively connected to the voltage monitoring unit (2), the control protection unit (3), the AC input switch (7), and the DC main switch (8); the AC input switch (7) is connected to the AC input display lamp ( 16), the DC main switch (8) is connected to the live indicator light (17), the DC output switch (5) is connected to the DC output indicator light (6), the AC input switch (7) is connected to the input terminal block (9), and the AC input cable (14) Penetrate through the input cable hole (10) and connect to the input terminal block (9), the DC main switch (8) is connected to the DC output switch (5), and the DC output switch (5) is connected to the output terminal block (12) , the DC output cable (15) passes through the output cable hole (13) and connects with the output terminal block (12).