Improvement of rectifier diode application in power supply of civil aviation access network 2

However, due to limitations in conditions, currently all FAl6 stations use UPS+C points to place battery packs for dual power supply. The direct use of battery packs to supply power to the FAl6 system has many hazards. The main manifestation is that the battery packs must be regularly discharged and maintained, and during the discharge process, the AC UPS input of the FAl6 cabinet needs to be cut off. Abnormal phenomena in the battery, such as a sudden increase in internal resistance causing an avalanche drop in output voltage, will result in the interruption of power supply to the entire cabinet; Secondly, this method lacks equipment and means to monitor it, making it impossible to obtain the most basic parameter information such as voltage value, charging and discharging current, and internal resistance value. This will make the integrated battery pack an invisible hidden fault point. Thirdly, place the battery pack in the FA-l6 cabinet. There is a possibility of accidental short circuit and ignition during the daily construction process of the FAl6 cabinet, such as the connection of data cables.diode

2 FAl6 System Power Supply Rectification Plan

Considering the drawbacks of battery pack power supply, a separate DC distribution cabinet can be set up in the system, and the DC power output from the DC distribution cabinet can be integrated into point C to supply power to the FAl6 equipment. The specific method is shown in Figure 2.

The power supply scheme still has problems after verification. Due to the output voltage of the DC distribution cabinet being -53.5 V (which is the cut-off voltage for battery float charging designed for the DC distribution cabinet), and the output voltage of the FAl6 rectifier module being -56.5 V, there will be a certain potential difference. As a result, the rectifier module of FAl6 will reverse charge the battery pack of the DC distribution cabinet, and the direction of the charging current is shown in Figure 3.diode