CN202602134U - Portable DC system load transfer auxiliary tank - Google Patents

Abstract

The utility model discloses a portable DC system load transfer auxiliary box, which comprises a box body, a charger monitor, an AC air switch, a feeder switch, a feeder indicator light, a charger, an AC input port, a storage battery input interface and a feeder output port. That is: the AC input port is connected to the input terminal of the charger through the AC air switch, the output terminal of the charger is connected to the power interface of the charger monitor and the comprehensive monitoring device, and the input terminal and output terminal of the charger are connected to the comprehensive monitoring device through the data acquisition line. The measurement and control devices are connected, and the output end of the charger is connected to the battery input port and the feeder output port through wires. The wire between the output end of the charger and the feeder output port is provided with a feeder switch and a feeder indicator light. The communication interface of the machine monitor is connected with the communication interface of the comprehensive measurement and control device through wires. The auxiliary box is simple in wiring, easy to carry and use, and ensures the safe operation of the substation.

Description

Portable DC system load transfer auxiliary box

technical field

The utility model relates to an overhaul and maintenance device for a DC power supply system, in particular to a portable DC system load transfer auxiliary box.

Background technique

The electric DC power supply system is mainly used in power plants, hydropower stations and various substations in the power system, providing power for the opening and closing of circuit breakers and the loads such as instruments, meters, relay protection, emergency lighting and non-interruptible devices in the secondary circuit. The working DC power supply must ensure the continuity of power supply and cannot cut off the power, so the reliability of the DC power supply system directly affects the safe operation of the power supply and distribution system.

At present, most power DC systems use high-frequency switching power supply charging modules and valve-regulated sealed lead-acid (VRLA) batteries, which have greatly improved their service life and safety. However, DC power failures and damages often require replacement or upgrading. It is an important content of DC maintenance. During the replacement process of the DC power supply of the DC system of the substation, the old screen body is removed and a new screen is installed. The control and power loads in the old DC system need to be transferred, but the DC power equipment is not allowed to lose power. Generally, a DC emergency power supply vehicle is often used as a transition , the shortcoming of this kind of DC emergency power supply vehicle is: because this kind of DC power supply vehicle is bulky and cumbersome, it cannot be used in some places where the space is small or difficult to enter the vehicle, so it cannot be used in any occasion. It can realize the live transfer of DC loads, and the new and old DC screens can be replaced safely, conveniently and quickly, which has become an obstacle to the maintenance of the DC power system.

Contents of the invention

The purpose of this utility model is to provide a portable DC system load transfer auxiliary box which can transfer DC loads with electricity in any occasion, realize safe and fast replacement of old and new DC screens, and is simple in wiring and convenient to carry and use.

In order to achieve the above purpose, the technical solution adopted by the utility model is: the portable DC system load transfer auxiliary box, including the box body, charger monitor, AC air switch, feeder switch, feeder indicator light, charger, AC input port 1. Battery input interface and feeder output port, characterized in that: the bottom of the box is provided with universal wheels, and the front panel of the box is provided with a charger monitor, an AC air switch, a feeder switch and a feeder indicator light , there is a charger and a comprehensive measurement and control device in the cabinet, and an AC input port, a battery input port and a feeder output port are provided on the rear panel of the cabinet, and the AC input port is connected to the input port of the charger through an AC air switch. The output end of the charger is connected to the power interface of the monitor of the charger and the integrated monitoring device through wires respectively, the input end and output end of the charger are respectively connected to the data interface of the integrated measurement and control device through the data acquisition line, and the output end of the charger is They are respectively connected to the battery input port and the feeder output port through wires. The wires between the output end of the charger and the feeder output port are provided with a feeder switch and a feeder indicator light. The communication interfaces of the devices are connected by wires.

The utility model is also implemented through the following measures: a fuse is provided on the wire between the output end of the charger and the battery input port, and the battery input port is connected with the battery pack.

Two chargers are arranged in parallel.

10 feeder output ports are connected in parallel. the

The beneficial effects of the utility model are: simple wiring, easy to carry and use, can completely transfer all the loads in the old DC system to the auxiliary device according to the distribution of the DC load in the substation, replace the normal operation of the original DC power supply equipment, and transfer the old DC power supply to the auxiliary device. The system is dismantled, and then a new DC system is installed, which ensures the safe operation of the substation and provides sufficient maintenance time for maintenance personnel.

Description of drawings

Fig. 1 is the front panel structure schematic diagram of the present utility model;

Fig. 2 is the structural representation of rear panel of the present utility model;

Fig. 3 is the schematic diagram of circuit wiring of the present utility model;

In the figure: 1. charger monitor; 2. AC air switch; 3. feeder switch; 4. feeder indicator light; 5. charger; 6. AC input port; 7. battery input port; 8. feeder output port; 9. Comprehensive measurement and control device; 10. Cabinet.

Detailed ways

Make the utility model with reference to accompanying drawing 1, Fig. 2, Fig. 3. The portable DC system load transfer auxiliary box includes a box body 10, a charger monitor 1, an AC air switch 2, a feeder switch 3, a feeder indicator light 4, a charger 5, an AC input port 6, a battery input interface 7 and a feeder output The port 8 is characterized in that: the bottom of the box 10 is provided with universal wheels, and the front panel of the box 10 is provided with a charger monitor 1, an AC air switch 2, a feeder switch 3 and a feeder indicator light 4 , a charger 5 and a comprehensive measurement and control device 9 are arranged in the box body 10, and an AC input port 6, a storage battery input interface 7 and a feeder output port 8 are arranged on the rear panel of the box body 10, and the AC input port 6 passes through the AC air switch 2. Connect with the input terminal of the charger 5, and connect the output terminal of the charger 5 with the power interface of the charger monitor 1 and the comprehensive monitoring device 9 through wires respectively, so as to provide power for the charger monitor 1 and the comprehensive measurement and control device 9, and charge The input end and the output end of the charger 5 are respectively connected to the data interface of the comprehensive measurement and control device 9 through the data acquisition line, and the collected data are sent to the comprehensive measurement and control device 9 through the data interface, and the output ends of the charger 5 are respectively connected to the storage battery through wires. The port 7 is connected to the feeder output port 8, and the wire between the output end of the charger 5 and the feeder output port 8 is provided with a feeder switch 3 and a feeder indicator light 4, and the communication interface of the charger monitor 1 is connected to the integrated The communication interfaces of the measurement and control devices 9 are connected by wires for mutual data exchange.

A fuse is provided on the wire between the output terminal of the charger 5 and the battery input port 7, and the battery input port 7 is connected to the battery pack.

The charger monitor 1 is a THJK001G-3S charger monitor produced by Hebei Chuangke Electronic Technology Co., Ltd. THJK001G-3S charger monitor is the monitoring center of the entire auxiliary box, real-time monitoring of AC power distribution, rectification module, DC feeder and other functional modules, full Chinese graphical interface, man-machine dialogue control, simple operation, easy to use.

Two chargers 5 are arranged in parallel, using a self-cooling intelligent high-frequency switch module, produced by Hebei Chuangke Company, the model is 1230D20NZ-3, this module is specially designed for the power system, and has the function of "four remotes". High-frequency switching power supply, the module adopts the world's leading "resonant voltage double-loop control resonant switching power supply technology", 220V, 20A, self-cooling and heat dissipation, can be plugged in and out, with overvoltage, overcurrent, short circuit, overtemperature, undervoltage , current limiting and other protection functions, small size, light weight, high efficiency and high reliability.

Comprehensive measurement and control device 9 adopts THJK001-C comprehensive measurement and control device produced by Hebei Chuangke Company, which can measure AC voltage, control bus voltage, combined bus voltage, control bus current, battery current, temperature, etc., and upload and charge through the data channel machine monitor.

The feeder output ports 8 are set up in parallel with 10 channels, and the GM series of Beijing People's Electrical Appliances is used, and the parameter is 25A, which can reliably guarantee the DC output.

The working principle of the utility model: after the 380V AC power supply is connected to the box body 10 through the AC input port 6, it is rectified by the charger 5 to convert the AC power into DC power, and the DC power supply can be provided for the charger monitor 1 and the comprehensive measurement and control device 9 After the power supply is started, the comprehensive measurement and control device 9 obtains the real-time information of the AC module, the rectifier module and the DC feed module through data collection and uploads it to the charger monitor 1 for real-time display through the communication interface. According to the data feedback, the charger 5 pairs The converted DC voltage and current are properly adjusted, and the adjusted DC can charge the battery through the battery access port 7, and can perform single or multiple DC outputs after passing through the feeder switch 3 and the feeder indicator light 4, and the DC output supports The feeder indicator light 4 is lighted on the road, thus the original DC panel power supply can be replaced to complete the DC load transfer, ensuring reliable and continuous DC power supply.

Claims (4)

1. the Portable DC system loading shifts auxiliary tank; Comprise casing (10), charger watch-dog (1), exchange air switch (2), feeder switch (3), feeder line indicator light (4), charger (5), ac input end mouth (6), storage battery input interface (7) and feeder line output port (8); It is characterized in that: the bottom of described casing (10) is provided with universal wheel; On the front panel of casing (10), be provided with charger watch-dog (1), exchange air switch (2), feeder switch (3) and feeder line indicator light (4); In casing (10), be provided with charger (5) and synthesis observe and control device (9); On the rear board of casing (10), be provided with ac input end mouth (6), storage battery input interface (7) and feeder line output port (8); Ac input end mouth (6) is connected with charger (5) input through exchanging air switch (2); Charger (5) output is connected with the power interface of charger watch-dog (1) with integrated monitoring apparatus (9) through lead respectively; The input of charger (5) is connected through the data-interface of data acquisition line with synthesis observe and control device (9) respectively with output; The output of charger (5) is connected with feeder line output port (8) with storage battery input port (7) through lead respectively; Lead between the output of described charger (5) and the feeder line output port (8) is provided with feeder switch (3) and feeder line indicator light (4), and the communication interface of charger watch-dog (1) is connected through lead with the communication interface of synthesis observe and control device (9).

2. Portable DC system loading according to claim 1 shifts auxiliary tank; It is characterized in that: the lead between the output of described charger (5) and the storage battery input port (7) is provided with fuse, and storage battery input port (7) is connected with batteries.

3. Portable DC system loading according to claim 1 shifts auxiliary tank, and it is characterized in that: described charger (5) parallel connection is provided with two.

4. Portable DC system loading according to claim 1 shifts auxiliary tank, and it is characterized in that: described feeder line output port (8) parallel connection is provided with 10 the tunnel.

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