Centralized monitoring system for integrated lifting power environment of cabin base station

Time：2020-08-24 View：

5. Room environment air conditioning system
The requirements of the mobile communication base station on the air environment quality can be lower than that of the exchange center machine room. The general comfort air conditioner adapted to the communication system is adopted, and the operation is controlled according to the combination of 1+1 backup and time-sharing rotation, and carry out linkage control of fire fighting equipment and air conditioning system. When the input of alternating current cannot be fully guaranteed, it should be combined with the control of the direct current ventilation ventilator in the cabin to ensure the emergency ventilation and heat dissipation when the alternating current is cut off for a long time.

Figure 5 Schematic diagram of ambient air conditioning in communication base station room

The capacity selection of the air conditioner is based on the air exchange calculation and the heat load calculation of the machine room. The ventilation volume is determined by the volume of the machine room and the number of air circulation per hour. The thermal load of the machine room includes two aspects: the thermal load of the building structure and the thermal load of the equipment. The thermal load of the equipment room is generally calculated according to the geographical location, climatic conditions, architectural design structure, equipment type, quantity, efficiency and other conditions of the base station by using empirical data method.

 

6. Solar power supply system
Solar cell power generation directly utilizes the ubiquitous and inexhaustible solar energy, does not consume working medium, does not discharge waste, does not rotate, does not have noise, is an ideal clean and safe new energy. Energy experts predict that the application of solar cells will enter its heyday in the middle of the 21st century and become one of the basic energy sources for human beings.

Figure 6 structure diagram of solar power supply system

The solar power supply system has the advantages of simple structure, easy installation, short construction period, simple maintenance, even maintenance-free, long service life, etc. In areas that can receive high solar radiation, no electricity or lack of electricity, it is very suitable for the construction of solar power supply system. Mobile communication base stations are generally built on high buildings or hillsides, receiving relatively high solar radiation, and many remote areas have no electricity or lack of electricity, therefore, it is ideal to apply solar power supply system to mobile communication base stations.
A single solar power supply system is mainly composed of solar cell phalanx, battery pack, controller, inverter, etc, if it is used as a supplementary energy source, it can be combined with the storage battery in the DC uninterruptible power supply scheme and the inverter in the AC uninterruptible power supply scheme. Solar cell phalanx is an array of solar cell modules composed of multiple series and parallel connections, providing +24V or -48V output required by the communication system. The controller is the center connecting the solar cell phalanx, the battery pack, the centralized monitoring system and the DC load, and automatically controls the switching on or off of the multi-channel solar cell phalanx in sequence, so as to limit the current and charge the battery step by step.
Capacity design of solar cell phalanx and battery pack: according to the local solar energy (Sunshine) resources, whether it is complementary to other energy supply forms, load size, etc.

 

7. Lightning protection grounding system
Mobile communication base stations are generally built on higher buildings or hillsides, and base station antenna racks are set on higher iron towers. Both iron towers and base station data centers are easy to become lightning channels for Leiyun to discharge to the ground. In the lightning protection and grounding system design or construction of inappropriate base station, Lightning overvoltage, especially powerful lightning electromagnetic pulse, is very serious damage to the base station equipment. A large number of painful lessons tell us to strengthen the Lightning defense capability of mobile communication base stations, reduce lightning disaster losses, comprehensive lightning protection and grounding system design must be carried out in combination with the building structure of the base station and the professional characteristics of the mobile communication base station.

Figure 7 Structure Diagram of lightning protection grounding system

In addition to reliable lightning protection and grounding for iron towers, antenna feeders, etc., three-level overvoltage protection device (SPD) should be adopted in AC power supply system to carry out classified protection according to certain distance requirements. Grounding is an important aspect of lightning protection system. Apart from lightning protection measures, the base station damaged by lightning often fails to do a good job of grounding, or the connection layout of grounding wire is unreasonable.
The designed current capacity of the first stage arrester of the system is generally 100KA, which is connected to the nearest side of the alternating current entering the data center. The second and third stage arresters are closely combined with the mobile cabin and the high frequency switching power.

 

8. Centralized monitoring system for power environment
The centralized monitoring system of power environment has gradually become a new maintenance and management method in the communication industry and has been widely used in various communication networks. Especially for the huge mobile communication network, many mobile communication base stations are located at the edge of the city or in mountainous areas. The traditional maintenance and management methods will make the operators fall into a passive situation. On the whole, mobile communication base stations generally have the following characteristics: many stations, limited transmission resources, few types and quantities of power equipment, unstable power supply of power grid, harsh environment, and generally unattended. Therefore, the centralized monitoring system of power environment is an urgent need for mobile communication base stations.

Figure 8 centralized monitoring system for power environment of communication base station

The centralized monitoring system of power environment mainly focuses on the power equipment of mobile communication base station, including high and low voltage power distribution, switching power, UPS, battery pack, oil engine, air conditioning and other equipment operation conditions, combined with mobile cabin to monitor, control and manage various environmental conditions, and flexible use of a variety of transmission methods for monitoring networking.

 

III. advantages of integrated solutions for mobile communication base stations
The integrated solution of mobile communication base station includes base station cabin, safety protection, fire protection, environment, AC power supply, DC power supply and other aspects, which can fully meet the requirements of various mobile communication equipment and staff on temperature, requirements for humidity, cleanliness, electromagnetic field strength, noise interference, safety and security, leakage prevention, heat insulation, power quality, vibration, lightning protection and grounding, etc.
Compared with the traditional mode of decentralized procurement, decentralized construction and decentralized management, comprehensive, integral and integrated solutions and one-stop services can save manpower investment for customers and shorten the construction period of the project, enhance the core competitiveness of customers.
The integrated solution of mobile communication base station fully considers and makes use of the close coordination relationship between various subsystems, which not only effectively ensures the overall safety and reliability of mobile communication base station, but also can avoid some unnecessary repeated investment.

 

IV. Summary
In the field of mobile communication, Xuedian technology provides comprehensive products, solutions and one-stop services, and provides all the contents of the mobile communication cabin base station project in a complete and comprehensive way. The integrated solution of Xuedian mobile communication cabin base station comprehensively considers the safety, reliability, compatibility, economy, expansion and maintainability of each system of mobile base station. For more information, visit the company's official website www.xdmast.com.