一种输电线路大功率取能电源的设计  

A design of high-power supply installed on transmission lines

作　　者：龚贤夫[1] 周浩[1] 戴攀[1] 张丹洋[1] 苏菲[1] 陆海清[1] 

机构地区：[1]浙江大学电气工程学院,浙江杭州310027

出　　处：《电力系统保护与控制》2012年第3期124-128,134,共6页Power System Protection and Control

基　　金：国家'十一五'科技支撑项目(2009BAG12A09)

摘　　要：根据变压器工作原理,设计了一种直接安装在输电线路上,输出为12 V/20 W的取能电源。当输电线路流过电流,利用特制的取能线圈可以感应出电势,经过整流、滤波,输出功率供给负载。为了能有效抵抗感应电势的尖波浪涌,加装了前端抗冲击保护,为了充分利用取能线圈输出的能量,采用了电压反馈保护电路,配合储能保护处电路,很大程度提升了电源最大输出功率。在此基础上,搭建取能电源电路,并在物理平台下模拟输电线路长时间流过正常工作电流、短时间(0.5 s)流过故障大电流和遭受雷电冲击的情况,记录取能电源工作状态,数据结果表明电源在模拟平台下(线路电流70～2000 A)能长时间稳定运行,有效抵抗取能线圈铁芯磁通饱和影响,稳定输出12 V/20 W。该电源体积小、成本低廉、输出功率大、稳定性高,采用卡扣式结构便于安装,可很好满足高压线路在线实时监测设备对电源的要求。According to the transformer principle, the paper designs a kind of self-power supply, which can be directly installed on the transmission lines and output＇ is 12 V/20 W. When current flows in the transmission lines, a special induction coil senses voltage, and then, through the rectifier, filter, outputs power to supply load. In order to effectively resist the sharp waves, an impact protection is installed, and the voltage feedback protection circuit and energy protection circuit are used to take full advantage of the efficiency of the coil. On this basis, the whole circuit is built. Simulating the normal operating in the physical platform of transmission lines for the test of long time, high current impacts at short time （0.5 s） on the fault situation and impacted by lightning and recording data, data show that the self-power supply works well in the simulation platform, reduces the harm of saturation of the core flux effectively, and outputs 12 V/20 W stably. The self-power supply has the advantage of small size, low cost, high outptit power, high stability, and is easy to install with snap-in structure, which can meet the high voltage monitoring equipment for power supply requirements very well.

关 键 词：取能线圈 最大输出功率 尖波电势 储能保护 

分 类 号：TM726[电气工程—电力系统及自动化] TN86[电子电信—信息与通信工程]