馈线终端设备智能电源的设计与实现

Design and Implementation of Intelligent Power Supply for Feed Terminal Unite

馈线终端设备(FTU)对输电线路的供电情况进行实时监测和通信任务,在输电线路发生故障时,要求FTU仍能正常工作显得十分重要。针对这一需求,设计了一个由取电模块、充电模块、超级电容器组和稳压模块等组成的电源系统。取电模块完成从输电线中获取电压,充电模块完成对超级电容器的快速充电,超级电容器组用来储能,实现输电线路断电时FTU的供电,稳压模块将超级电容器的输出电压维持在FTU所需的稳压值,系统的智能控制由主控制芯片LPC2138来实现。通过测试,该电源系统的输出电压参数、输电线路断电后系统持续供电时间和质量都满足了要求,解决了FTU的可靠供电问题。

Feed terminal unite （FTU） monitors power supply of transmission line in real-time and implements communication tasks.It is very important to require FTU still work when transmission line fails.A smart power system is designed that includes down power module, charge module, super-capacitor bank, regulated module, and so on.The down power module implements to obtain the voltage from transmission line.The charging module completes the quick charging of super-capacitor.The super-capacitor bank provides the power supply of FTU when transmission line is outage.The voltage regulator module keeps the output voltage of the super-capacitor at a stable value which is required by FTU.The intelligent control of system is realized by LPC2138 chip.After testing,the power supply system can meet the requirements in output voltage parameters, power supply time and quality aspects.The problem in power supply reliability of FTU is solved effectively.