CN204578349U - The incense electric installation of indoor distributed system end-equipment - Google Patents

Abstract

The utility model provides a power supply and backup device for terminal equipment of an indoor distribution system, comprising: a rectification module, the AC input terminal of the rectification module is connected to the AC mains, and the rectification module includes a plurality of DC output terminals; a storage battery module, a storage battery module Connected to the first DC output terminal of the rectifier module; Transformer module, the first input terminal of the transformer module is connected to the AC mains, and the second input terminal is connected to the second DC output terminal of the rectifier module; The transformer module includes Multiple AC output terminals for connecting to AC loads; among them, when the AC mains is normally powered, the rectifier module supplies power to the battery module through the first DC output; when the AC mains is not normally powered, the battery module supplies power through the rectifier module Supply power to the DC load, and/or output DC voltage to the transformer module through the rectifier module, and supply power to the AC load after voltage conversion by the transformer module. The power supply and backup device can not only supply power to DC loads, but also can supply power to AC loads.

Description

Power supply and backup device for terminal equipment of indoor distribution system

technical field

The utility model relates to the field of communication equipment power supplies, in particular to a power supply and backup device for terminal equipment of an indoor distribution system.

Background technique

At present, there are two power supply schemes for the terminal equipment of the indoor distribution system: one is that the AC RRU (radio frequency remote unit) is powered by the nearest ~220V AC mains (in important scenarios, a small integrated AC UPS may be configured); the other is that the DC RRU uses the nearest Take ~220V mains power and provide power through the AC-to-DC module (AC/DC) (a small DC wall-mounted power supply may be configured in important scenarios).

For the solution of using a small integrated AC UPS, it will output ~220V AC power for the RRU equipment after rectification and inverter two-stage conversion of the nearby ~220V mains power. However, the small integrated UPS can only output AC power and cannot be directly used for on-load DC RRU equipment, and the installation space of the equipment is relatively large, and the later maintenance, especially the battery maintenance, requires a lot of work.

For the solution using the AC-to-DC module, the AC-to-DC module converts the AC power into -48V DC power that can be connected to the DC RRU, but the AC-to-DC module is basically not equipped with a backup battery, and the AC-to-DC module cannot be expanded according to capacity requirements. The installation method is also inflexible, and it cannot be directly used for AC RRU power supply.

Utility model content

The technical problem to be solved by the utility model is to provide a power supply and backup device for terminal equipment of an indoor distribution system, which can supply power for both DC loads and AC loads, and has a simple and flexible structure.

In order to solve the above technical problems, the utility model adopts the following technical solutions:

The utility model provides a power supply and backup device for terminal equipment of an indoor distribution system, comprising: a rectification module, the AC input end of the rectification module is connected to the AC mains, and the rectification module includes a plurality of DC output ends; module, the battery module is connected to the first DC output terminal of the rectification module; the transformer module, the first input terminal of the transformer module is connected to the AC mains, and the second input terminal is connected to the rectifier module The second DC output terminal is connected; the transformer module includes multiple AC output terminals for connecting to AC loads;

Wherein, when the AC mains is normally powered, the rectifier module supplies power to the battery module through the first DC output terminal;

When the AC power supply is not normally supplied, the battery module supplies power to the DC load through the rectification module, and/or outputs a DC voltage to the transformation module through the rectification module, and performs After voltage conversion, power is supplied to AC loads.

Further, when the AC mains is normally powered, the rectification module supplies power to the DC load through the third DC output terminal, and/or, the transformation module converts the AC mains voltage to supply power to the AC load.

Further, the power supply and backup device further includes: a power distribution module, the input end of the power distribution module is connected to the output end of the transformation module, and the power distribution module includes a plurality of AC output.

Further, the power supply and backup device further includes: a monitoring module, which is respectively connected to the rectification module, the transformer module and/or the power distribution module through monitoring signal lines.

Further, the DC output terminal of the rectification module outputs 48V DC.

Further, the rectifier module supports parallel connection of multiple rectifier modules, the battery module shown supports parallel connection of multiple battery modules, and the transformer module supports parallel connection of multiple transformer modules.

Further, the installation method of the power supply and backup device includes: a wall-mounted installation method and a pole-mounted installation method.

The beneficial effects of the utility model are: the power supply and backup device provided by the utility model, when the AC mains supplies power normally, the rectifier module supplies power to the storage battery module through the first DC output terminal. The rectifier module supplies power to the DC load through the third DC output terminal, and/or, the transformer module converts the voltage of the AC mains to supply power to the AC load; The load is powered, and/or, the rectifier module outputs a DC voltage to the transformer module, and the voltage is converted by the transformer module to supply power to the AC load. In the utility model, through the cooperation of the rectifier module, the storage battery module and the transformer module, a set of equipment can be used to supply power for both DC loads and AC loads, and the structure is simple and flexible.

Description of drawings

Fig. 1 shows the schematic diagram of the structure of the power supply and backup device provided by the embodiment of the present invention;

Fig. 2 shows the working schematic diagram of the monitoring module provided by the embodiment of the present invention;

FIG. 3 shows a schematic diagram of a DC scene circuit topology provided by an embodiment of the present invention;

FIG. 4 shows a schematic diagram of the circuit topology of the AC scene provided by the embodiment of the present invention;

Fig. 5 shows a schematic diagram of the operation of the DC backup scene when the mains power is normal provided by the embodiment of the utility model;

Fig. 6 shows a schematic diagram of the operation of the DC backup scene when the mains power is abnormal provided by the embodiment of the utility model;

Fig. 7 shows a schematic diagram of the operation of the AC backup scene when the mains power is normal provided by the embodiment of the utility model;

Fig. 8 shows a schematic diagram of the operation of the AC backup scene when the mains power is abnormal provided by the embodiment of the utility model;

Fig. 9 shows a schematic diagram of the operation of the AC-DC hybrid backup power scene provided by the embodiment of the utility model when the mains power is normal;

Fig. 10 shows a schematic diagram of the operation of the AC-DC hybrid backup power scene when the mains power is abnormal provided by the embodiment of the utility model;

Fig. 11 shows the block diagram of -48V output power modular assembly structure provided by the embodiment of the present invention;

Fig. 12 shows the block diagram of the modular assembly structure of the 240V output power supply provided by the embodiment of the present invention;

Fig. 13 shows -48V and 240V mixed output power supply modular assembly structural block diagram provided by the embodiment of the utility model;

Figure 14 shows a schematic diagram of the appearance of the power supply and backup device provided by the embodiment of the present invention;

Figure 15 shows a schematic diagram of the AC input and output terminals provided by the embodiment of the present invention using waterproof quick-plug terminals;

Fig. 16 shows one of the schematic diagrams of the DC output terminals provided by the embodiment of the present invention;

Figure 17 shows the second schematic diagram of the DC output terminal provided by the embodiment of the present invention;

Fig. 18 shows a schematic diagram of the monitoring interface terminal provided by the embodiment of the present invention;

Figure 19 shows a schematic diagram of wall-mounted installation of the power supply and backup device provided by the embodiment of the present invention;

Fig. 20 is a schematic diagram showing the pole installation of the power supply and backup device provided by the embodiment of the present invention.

Detailed ways

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided in order to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

The embodiment of the utility model provides a power supply and backup device for terminal equipment of an indoor distribution system, as shown in FIG. 1 , including a rectifier module, a storage battery module and a transformer module.

The AC input terminal of the rectification module is connected to AC mains (220V) and outputs DC (-48V) to provide battery charging and discharging management functions. The rectification module also includes multiple DC output terminals. The rectifier module supports parallel connection of multiple rectifier modules. The output power of one rectifier module is limited. When a rectifier module cannot output more power, one or more rectifier modules can be connected in parallel to increase the output power.

The battery module is a battery pack in the form of a module that provides energy storage in the system, and is connected to the first DC output terminal of the rectifier module. The battery module supports parallel connection of multiple battery modules. The principle is similar to the parallel connection of the rectifier module, and will not be repeated here. The battery management module (BMS) is integrated on the battery module.

The transformer module provides 2 inputs (AC 220V, DC-48V), the first input terminal is connected to the AC mains, the second input terminal is connected to the second DC output terminal of the rectifier module, and the transformer module also includes multiple An AC output terminal for connecting an AC load. The transformer module supports ECO (Economic and Efficient Operation) mode operation, which has high efficiency and saves energy consumption. When there is mains power, it is powered by AC input and does not require power from the rectifier module; when there is no mains power, it is powered by the battery. The transformer module supports the parallel connection of multiple transformer modules. The principle is similar to the parallel connection of the rectifier module, and will not be repeated here. The transformer module can be implemented in two ways: an inverter or a DC booster. Based on efficiency considerations, this solution is preferably implemented with a DC booster. According to the "240V DC Power Supply System for Communication" (YDT2378-2011) standard, and according to the operating voltage range of the AC load (240V±20%), the -48V DC power supply is boosted to 240V DC power supply to supply power for the 220V AC load.

As shown in Figure 1, the power supply and backup device also includes: a power distribution module, the input end of the power distribution module is connected to the output end of the transformer module, and the power distribution module includes a plurality of AC output terminals for connecting to AC loads . The number of AC output terminals on a transformer module is limited. When there are AC loads that exceed the number of AC output terminals on the transformer module and need power supply, a power distribution module can be connected behind the transformer module to provide more AC. The output end is connected with an AC load.

As shown in FIG. 1 , the power supply and backup device further includes: a monitoring module, which is respectively connected to the rectification module, the transformer module and the power distribution module through monitoring signal lines. The monitoring module is used to monitor the operating status of each unit in the entire system, collect, display, and set the operating parameters of the system, and perform automatic control and protection according to the system status. At the same time, it can communicate with an external computer to form a local or remote centralized monitoring system, through 1 RS-485 or 2 dry contacts, and through the load RRU (load RRU, which is equivalent to the DC load or AC load mentioned above) transmission The link is connected to the power environment monitoring system.

The monitoring access function is an important function that has been lacking in terminal power supply and backup equipment in the past, but is urgently needed for network operation and maintenance. Through monitoring access, the centralized maintenance platform can query the status of terminal equipment in real time, and even understand the working status of each module, providing an important guarantee for network performance and security.

The embodiment of the utility model integrates the function of the monitoring module in the rectification module in order to facilitate the installation of the project, improve the degree of intensification, and reduce the cost. The connection relationship and working operation of the relevant monitoring modules are shown in Figure 2 (the thick arrows in the figure are monitoring lines, and the other arrows are AC power lines or DC power lines).

The monitoring module monitors the status of the terminal equipment in real time, and uploads data in real time through the transmission link of the terminal RRU. Considering the comprehensiveness of the monitoring data, the monitoring module is connected to the battery module through a monitoring line, and connected to the rectifier module through RS-485. All monitoring data is directly fed back to the remote monitoring platform through the transmission link of the terminal RRU equipment. The battery module can extract simple data by means of dry contact, or it can be connected through RS-485 to transmit comprehensive status data to the maintenance platform.

In order to facilitate the installation of the project, the practical embodiment of the utility model can improve the degree of intensification, reduce the complexity of the equipment, and improve the reliability. power distribution module.

As shown in FIG. 3 , it is a schematic topology diagram of a DC scene circuit provided by an embodiment of the present invention. The DC load scenario is configured with a rectifier module and a battery module, and the rectifier module is integrated with a monitoring module. The rectifier module provides 1 AC input and 3 DC outputs. The battery management module (BMS) communicates with the monitoring module through the RS-485 interface or dry contact. It should be noted that the number of AC input terminals and DC output terminals provided by the rectifier module is not limited to the number described above, and can be designed according to actual needs.

As shown in FIG. 4 , it is a schematic topology diagram of an AC scene circuit provided by an embodiment of the present invention. In the AC load scenario, a configuration transformation module is added, and the configuration module is integrated in the voltage transformation module. The transformer module provides 1 channel of 48V DC input and 1 channel of AC input, provides 3 channels of load output, and communicates with the rectifier module through RS-485. It should be noted that the numbers of AC and DC input terminals and load outputs provided by the transformer module are not limited to the numbers described above, and corresponding designs can be made according to actual needs.

The power supply and backup device provided by the embodiment of the utility model can not only supply power to DC loads, but also can supply power to AC loads. According to the different types of load power supply, the operation mode of the power supply and backup device is as follows.

Embodiment one

When only providing backup power for DC loads, the operation mode of the power supply and backup device provided by the embodiment of the present invention is as follows.

As shown in Figure 5, when the AC power supply is normal, the rectifier module rectifies the 220V AC power into 48V DC, charges the battery module through the first DC output terminal, and supplies power to the DC load through the third DC output terminal.

As shown in FIG. 6 , when the AC power supply is not normally supplied, the battery module supplies power to the DC load through the rectifier module. Wherein, the rectifier module is provided with a switch circuit for switching the circuit. When the AC mains power is abnormal, the battery module supplies power to the DC load through the switch circuit on the rectifier module.

Embodiment two

When only supplying backup power for AC loads, the operation mode of the power supply and backup device provided by the embodiment of the present invention is as follows.

As shown in FIG. 7 , when the AC mains is normally supplied, the rectification module rectifies the 220V AC mains into 48V DC, and charges the battery module through the first DC output terminal.

As shown in Figure 8, when the AC mains is not normally powered, the battery module outputs a DC voltage to the transformer module through the rectifier module, and supplies power to the AC load after voltage conversion by the transformer module.

Embodiment three

When not only supplying power to DC loads, but also supplying backup power to AC loads, the operation mode of the power supply and backup device provided by the embodiment of the utility model is as follows.

As shown in Figure 9, when the AC power supply is normal, the rectifier module rectifies the 220V AC power into 48V DC, charges the battery module through the first DC output terminal, and supplies power to the DC load through the third DC output terminal. The transformer module converts the voltage of the AC mains to supply power to the AC load.

As shown in FIG. 10 , when the AC mains is not normally powered, the battery module supplies power to the DC load through the rectifier module. The DC voltage is output to the transformer module through the switching circuit on the rectifier module, and the voltage is converted by the transformer module to supply power to the AC load.

Embodiment Four

The power supply and backup device provided by the embodiment of the utility model can select different rectifier modules, storage battery modules and output expansion modules to form a product structure on site according to the type of load power supply and capacity requirements. The product structure block diagrams are shown in Figures 11, 12 and As shown in Figure 13, they are the modular assembly structure diagram of -48V power supply, the block diagram of modular assembly structure of 240V output power supply and the block diagram of modular assembly structure diagram of -48V and 240V output power supply.

Among them, the AC distribution box provides 220V AC, the 1500W PSU corresponds to the rectifier module, the two 20AH lithium batteries in series correspond to the battery module, the output conversion module corresponds to the transformer module, the AC RRU corresponds to the DC load, and the DC RRU corresponds to the AC load.

It should be noted that the block diagram of the product structure provided in this embodiment is for reference only, and actual implementation needs to be designed and assembled according to the actual situation.

Embodiment five

The rectifier module, conversion module, and battery module support multiple combinations and assembly to realize capacity expansion. The embodiment of the present invention provides a module shape structure, as shown in FIG. 14 .

Various interfaces of the module are shown in Figure 15-18:

(1) The AC input and output terminals adopt waterproof quick-plug terminals, as shown in Figure 15.

(2) DC output terminals (the battery interface uses OT terminals due to the large current, and the load uses OT or quick-plug terminals, as shown in Figures 16 and 17).

(3) The monitoring interface adopts a unified RJ45 terminal with a total of 8 lines, 4 lines are defined as RS485, and the other 4 lines are defined as 2-way dry contact output, as shown in Figure 18.

In order to adapt to the different requirements of various installation environments, the power supply and backup device provided by the embodiment of the utility model supports the following flexible installation methods:

(1) Wall-mounted installation: Each module of the actual research and development can be installed on the wall through the mounting parts, including independent flat installation and multi-module combined side assembly, as shown in Figure 19.

(2) Pole installation: side assembly of the multi-module pole combination is more flexible and convenient, as shown in Figure 20.

The power supply and backup device for the terminal equipment of the indoor distribution system provided by the embodiment of the utility model can simultaneously meet the power supply and backup requirements of the indoor sub-system of the whole network, and can meet the power supply and backup requirements of a single physical site load with AC, DC, AC+DC and other scenarios. Without changing the existing network equipment, the installation and transformation of the terminal equipment using the power supply and backup equipment of this case can be completed in a short time, and at the same time, the monitoring data transmission of the terminal power supply and backup equipment can be realized.

The standardization and modular design concepts proposed in this solution, heat dissipation methods, flexible installation methods, internal data collection, and use of load RRUs to realize terminal network equipment monitoring are all key points that need to be protected in this case. The comparison between the power supply and backup device in this solution, small UPS, and small DC wall-mounted power supply is shown in the table below.

Compare items Indoor terminal backup power small UPS small DC wall-mounted Installation Space Requirements 36 liters 126 liters 85 liters system capacity 3kW 3kVA (2.4kW) 7.5kW installation method pole, wall, wall hanging, floor wall hanging, floor Whether to rewire no yes yes Reliability (failure rate) 0.04% 0.10% 0.04% efficiency 92% 80% 94% Whether to support capacity expansion yes no no Support maximum battery capacity 100Ah 130Ah 80Ah Transformation time 3.5 hours 5 hours 5 hours cutover time 2 minutes 30 minutes 30 minutes initial investment cost middle Low middle Temperature control method Natural cooling Straight ventilation Straight ventilation noise <45dB <55dB <55dB Whether to support monitoring yes none none Links need to be monitored independently no - - Support load power consumption type AC, DC comminicate DC

The modular power supply and backup device provided by this solution is tailor-made for the needs of mobile terminal stations, and can well match the requirements of indoor terminal station scenarios.

(1) Modular system design, supporting parallel expansion of modules to meet various load sizes and load type combinations;

(2) Small size, flexible installation, suitable for various complex scenarios, including weak electric wells in small spaces;

(3) Natural heat dissipation without fans, low noise, effectively reducing noise complaints, suitable for installation in residential corridors;

(4) The project is simple, the station can be built quickly, and short-term power outages can be transformed to meet the requirements of engineering transformation in important places;

(5) Realize in-band network management, provide effective monitoring for terminal devices without independent transmission resources, and reduce investment and operation and maintenance costs.

What has been described above is a preferred embodiment of the present utility model, and it should be pointed out that for those skilled in the art, some improvements and modifications can also be made without departing from the principles described in the present utility model. Within the protection scope of the present utility model.

Claims (7)

1. A power supply device for terminal equipment of an indoor distribution system, characterized in that it comprises: A rectification module, the AC input terminal of the rectification module is connected to the AC mains, and the rectification module includes a plurality of DC output terminals; a battery module, the battery module is connected to the first DC output end of the rectifier module; Transformer module, the first input terminal of the transformer module is connected to the AC mains, and the second input terminal is connected to the second DC output terminal of the rectifier module; the transformer module includes multiple AC output of the load; Wherein, when the AC mains is normally powered, the rectifier module supplies power to the battery module through the first DC output terminal; When the AC power supply is not normally supplied, the battery module supplies power to the DC load through the rectification module, and/or outputs a DC voltage to the transformation module through the rectification module, and performs After voltage conversion, power is supplied to AC loads. 2. The power supply and backup device according to claim 1, characterized in that, When the AC mains is normally supplied, the rectification module supplies power to the DC load through the third DC output terminal, and/or the transformation module converts the AC mains voltage to supply power to the AC load. 3. The power supply and backup device according to claim 1, further comprising: A power distribution module, the input terminal of the power distribution module is connected to the output terminal of the transformation module, and the power distribution module includes a plurality of AC output terminals for connecting to AC loads. 4. The power supply and backup device according to claim 1 or 3, further comprising: The monitoring module is respectively connected with the rectification module, the transformer module and/or the power distribution module through the monitoring signal line. 5. The power supply and backup device according to claim 1, wherein the DC output terminal of the rectification module outputs 48V DC. 6. The power supply and backup device according to claim 1 or 3, wherein the rectifier module supports parallel connection of multiple rectifier modules, the battery module shown supports multiple battery modules in parallel, and the transformer module supports multiple The transformer modules are connected in parallel. 7. The power supply and backup device according to claim 1, wherein the installation methods of the power supply and backup device include: wall-mounted installation and pole-holding installation.