CN204425037U - A kind of maintenance-free high frequence Switching Power Supply DC power cabinet - Google Patents

Abstract

The utility model relates to a maintenance-free high-frequency switching power supply DC power supply cabinet. The incoming line of the AC input adopts a dual-circuit power supply, and the inverter device adopts a modular design and is provided with a charging module, a detection module and a protection module. There are three DC circuit breakers with different breaking capacities on the main circuit, and the three circuit breakers are respectively connected to the control output, the closing output and the battery output in sequence. The lower level of the main circuit is equipped with a monitoring unit, and the lower level of the microcomputer is connected Rectification module, the rectification module supplies power to the control bus and is connected to the storage battery. The DC power supply cabinet is provided with RS485 and RS232 communication interfaces. , to achieve remote "four remote" control, automatic control of the entire power cabinet, saving the cost of manpower maintenance, reducing the investment in human and financial resources.

Description

A maintenance-free high-frequency switching power supply DC power supply cabinet

technical field

The utility model relates to the field of DC power supplies, in particular to a maintenance-free high-frequency switching power supply DC power supply cabinet.

Background technique

High-frequency switching power supply DC power supply cabinets are widely used in power plants, substations, high-rise buildings, intelligent communities, user substations of factories and mines in power systems, self-provided power plants, switching stations, railways, metallurgy, petrochemicals, etc. The location of the charging screen, but the maintenance cost of the high-frequency switching power supply DC power supply cabinet accounts for a large proportion of the power investment, and excessive maintenance wastes too much manpower, material and financial resources. The high-frequency switching power supply DC power supply cabinet is widely used in power The power plants, substations and maintenance in the system waste too much human, material and financial resources.

DC power supply is playing an increasingly important role in today's electrical life. In many cases, DC can replace AC to play a better role, just like in high-voltage transmission, if DC transmission is used, half of the cost can be saved. Cables, in the existing technology, the high-frequency switching power supply DC power supply cabinet can only play the role of power distribution, and the detection, protection and automatic control are not done well enough, resulting in the high-frequency switching power supply DC power supply cabinet being put into use. Frequent maintenance is required, which directly causes the problem of unstable power supply and increased costs. Moreover, the automatic power distribution of the existing high-frequency switching power supply DC power supply cabinet has not been fully realized. There is also a lot of expenditure on human investment.

Utility model content

Considering the current state of the prior art above, the technical problem to be solved by this utility model is to provide a maintenance-free high-frequency switching power supply DC power supply cabinet to solve the above-mentioned multiple defects caused by the prior art.

In order to achieve the above purpose, the utility model provides the following technical solutions: a maintenance-free high-frequency switching power supply DC power supply cabinet, including a DC power supply cabinet body composed of an AC input, a converter device and a DC output, and the incoming line of the AC input Dual-circuit power supply is adopted, the converter device adopts a modular design and is equipped with a charging module, a detection module and a protection module, and three DC circuit breakers with different breaking capacities are arranged on the main circuit, and the three circuit breakers are connected with each other in turn. The control output, closing output and battery output are connected, and the main circuit is provided with a monitoring unit at the lower level. The monitoring unit uses a microcomputer as the control center and performs connection control on the DC system, insulation monitoring, battery inspection, and fault alarm. The lower level of the microcomputer is connected with a rectification module, and the rectification module supplies power to the control bus and is connected with the storage battery. The DC power supply cabinet is provided with RS485 and RS232 communication interfaces, and the communication interfaces communicate with the microcomputer.

Preferably, the two-way electric wires of the AC input are cross-connected.

Preferably, the detection module has branch AC and DC parameter detection, battery node voltage detection, insulation branch location detection, feeder circuit status detection, module fault detection, and temperature detection.

Preferably, the protection module has AC input under-, over-voltage, and phase-loss protections, output under- and over-voltage protections, output voltage-limiting, current-limiting protections, and module overheating and temperature protections.

Preferably, the inside of the power module has a short-circuit recovery feature.

Preferably, when the rectifier module performs equal charging and floating charging of the storage battery, the floating charging voltage is 2.25 (V×n), the equalizing charging voltage is 2.33 (V×n), and the charging current value is 0.1CA.

Preferably, the rectification module is the working power supply of the branch circuit.

Preferably, the impact load of the parent circuit is directly powered by a storage battery.

The beneficial effect of adopting the above technical scheme is: adopting a maintenance-free high-frequency switching power supply DC power supply cabinet provided by the invention, adopting a modular structure combined with the advanced current conversion technology of a microcomputer DC screen, so that the precision of voltage and current stabilization is high, and the grain Low wave coefficient, small size, high power, stable performance, reliable operation, and can realize remote centralized telemetry, remote signaling, remote adjustment, remote control, good comprehensive benefits, high-performance DC power supply non-stop power supply, high reliability, Long life and other characteristics, while the converter device adopts high-frequency switch resonance high-efficiency intelligent power supply module, intelligent digital technology, and is equipped with monitoring and protection modules, which can monitor each system of the power cabinet and respond to and protect faults. The cabinet can also complete the automatic control and management of the floating, and it is equipped with an electric temperature compensation function. Through the RS232/RS485 interface, it can form various network management systems with computers or integrated automation to automatically control the entire power cabinet, saving manpower maintenance. Expenses, reducing the investment of human and financial resources.

Description of drawings

Fig. 1 is a schematic structural diagram of the maintenance-free high-frequency switching power supply DC power supply cabinet of the present invention.

Fig. 2 is a schematic diagram of the underlying communication structure of a DC panel in this embodiment.

Fig. 3 is a schematic diagram of the overall structure of the microcomputer interface of the present invention.

Among them: 1—a maintenance-free high-frequency switching power supply DC power cabinet, 2—charging module, 3—detection module, 4—protection module, 5—DC circuit breaker, 6—rectification module, 7—insulation monitoring, 8—battery Inspection, 9—fault alarm, 10—DC system, 11—microcomputer.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1, a maintenance-free high-frequency switching power supply DC power supply cabinet 1 includes a DC power supply cabinet body composed of an AC input, a converter device, and a DC output. The incoming line of the AC input adopts a dual-circuit power supply. The converter device adopts a modular design and is equipped with a charging module 2, a detection module 3 and a protection module 4, and three DC circuit breakers 5 with different breaking capacities are provided on the main circuit, and the three circuit breakers 5 are respectively connected with the control output , the closing output and the battery output are connected, and the lower level of the main circuit is provided with a monitoring unit, which uses a microcomputer as the control center and performs connection control on the DC system 10, insulation monitoring 7, battery inspection 8, and fault alarm 9, The lower level of the microcomputer is connected with a rectification module 6, the rectification module 6 supplies power to the control bus and is connected to the storage battery, the DC power supply cabinet is provided with RS485 and RS232 communication interfaces, and the communication interface communicates with the microcomputer 11, and the high-frequency switching power supply DC power cabinets are widely used in power plants and substations in power systems, and excessive maintenance wastes too much manpower, material and financial resources. High-frequency switching power supply DC power cabinets are widely used in power plants in power systems, substations and excessive maintenance wastes Too much manpower, material and financial resources. In this embodiment, a new generation of products developed on the basis of the original series of microcomputer-controlled DC screens, with advanced technical indicators, High voltage and current stabilization accuracy, low ripple coefficient, small size, high power, stable performance, reliable operation, integrating various functions, can realize remote centralized four-remote, good comprehensive benefits, high-performance DC uninterruptible power supply, With the characteristics of high reliability and long life, it is widely used in power plants, substations, high-rise buildings, intelligent communities, user substations of factories and mines in power systems, self-provided power plants, switching stations, railways, metallurgy, petrochemicals, etc. The place where the operating power supply and the charging screen are placed, the rectifier adopts high-frequency switch resonant high-efficiency intelligent power supply module, intelligent digital technology, independent current sharing, temperature-controlled fan, complete protection functions, high cost performance, perfect system detection, convenient setting, four-remote intelligent management . Monitoring According to the operation management diagram of the battery power system, the automatic control and management of the balance are completed, and the electric temperature compensation function is provided. The monitoring module provides the power standard RUT/CDT protocol, and can communicate with the computer through the RS232/RS485 or TCP/IP interface. Or comprehensive automation to form various network management systems. As shown in Figure 3, the ultra-large Chinese blue touch screen display is more convenient to operate, easy to maintain, strong in sets, and has no pollution to the environment. In addition, the three breakers use DC circuit breakers with different capacities and levels of current to carry out reasonable coordination between the upper and lower levels of the system. Protect.

It is worth noting that the two-way wires of the AC input use crossover wiring. When the two-way input wires use crossover wires, the one that uses crossover wiring can be used as a backup for the other. When a circuit fails , the other way can provide backup for the other way. The detection module has branch AC and DC parameter detection, battery section voltage detection, insulation branch location detection, feeder circuit status detection, module fault detection, and temperature detection. If there are some abnormalities beyond the specified range, they will be passed to the protection module to prepare for protection. The protection module has AC input undervoltage, overvoltage, phase loss protection, and output undervoltage and overvoltage protection. Output voltage limiting, current limiting protection, module overheating, temperature protection, when it exceeds the range specified by the protection module, the protection trip will be activated.

Based on the above, the power supply module has a short-circuit recovery feature inside. Such a design will recover the energy generated by the short-circuit, and the rectifier module will charge the battery evenly and float, and the float charge voltage is 2.25 (V× n), the equalizing charging voltage is 2.33 (V×n), and the charging current value is 0.1CA. Such a setting value is conducive to the stable operation of the system. The rectification module is the working power supply of the branch circuit, and the rectification module directly provides The power supply also reduces the energy loss caused by multi-stage transmission. The impact load of the combined mother circuit is directly powered by the battery. The battery is charged, and the impact load of the mother circuit is directly powered by the battery.

The above is only the preferred embodiment of the utility model, it should be pointed out that, for those of ordinary skill in the art, without departing from the inventive concept of the utility model, some deformations and improvements can also be made. Belong to the protection scope of the utility model.

Claims (8)

1. a maintenance-free high frequence Switching Power Supply DC power cabinet, comprise DC power cabinet body by exchanging input, convertor assembly and direct current export composition, it is characterized in that: in described interchange input, inlet wire adopts and supplies power with double circuit, described convertor assembly adopts modularized design and is provided with charging module, detection module and protection module, be provided with the DC circuit breaker of three different breaking capacity on the main circuit, described three circuit breakers export with control respectively successively, combined floodgate exports and storage battery exports connected, described main circuit subordinate is provided with monitoring unit, described monitoring unit is using microcomputer as control centre and to direct current system, insulating monitoring, battery inspection, fault alarm carries out connection control, described microcomputer subordinate is connected with rectification module, described rectification module is powered to control bus and is connected with storage battery, described DC power supply is provided with RS485 and RS232 communication interface cashier's office in a shop, described communication interface communicates with microcomputer.

2. a kind of maintenance-free high frequence Switching Power Supply DC power cabinet according to claim 1, is characterized in that: the described two-way electric wire exchanging input adopts improved cross connect.

3. a kind of maintenance-free high frequence Switching Power Supply DC power cabinet according to claim 1, it is characterized in that: described detection module has the detection of branch road AC-DC parameter, battery power conservation pressure detects, insulation branch road detection and localization, and feeding circuit state-detection, module failure detect, temperature detection.

4. a kind of maintenance-free high frequence Switching Power Supply DC power cabinet according to claim 1; it is characterized in that: described protection module have exchange input owe, overvoltage, open-phase protection; export deficient, overvoltage protection, export pressure limiting, current-limiting protection, module is overheated, temperature protection.

5. a kind of maintenance-free high frequence Switching Power Supply DC power cabinet according to claim 1, is characterized in that: described power module inside has short circuit and reclaims characteristic.

6. a kind of maintenance-free high frequence Switching Power Supply DC power cabinet according to claim 1, it is characterized in that, described rectification module all filling and floating charge storage battery, float charge voltage is 2.25 (V × n), even charging voltage is 2.33 (V × n), and charging current value is 0.1CA.

7. a kind of maintenance-free high frequence Switching Power Supply DC power cabinet according to claim 1, it is characterized in that, described rectification module is the working power of branch road.

8. a kind of maintenance-free high frequence Switching Power Supply DC power cabinet according to claim 1, the impact load in the female loop of described conjunction is by direct battery power.