摘要
配电网单向接地故障指示器在配电网自动化方面应用广泛,但其在线故障诊断所需的能量不能靠低压侧供给,只能在高压端获取,因此文中设计了特殊的取电电路和控制电路,根据故障指示器各个元器件的需求,此取能电源可以为故障指示器提供5 V、-4 V和3.2 V 3路电压,以满足故障指示器信号采集和处理以及无线通信的需要。整机实验结果表明,该取能电源在15～800 A的变化范围内,能提供不少于1.5 W的功率,可满足故障指示器的需要。
The one-way ground fault indicator of the distribution network has found wide applications in distri- bution automation, but the energy it needs for online fault diagnosis can not rely on the low-vohage side. It can only be obtained in the high voltage side. Therefore, we have designed a special power taking circuit and control cir- cuits. According to the needs of various components of the fault indicator the power supply can provide 5 V, - 4 V and 3.2 V three-way voltage to meet the needs of the fault indicator signal in its acquisition, processing and wireless communications. The whole experimental results show that the power supply can provide a power of not less than 1.5 W when the current of overhead lines change from 15 A to 800 A. It can meet the requirement of the fault indicator.
出处
《电子科技》
2012年第9期108-111,共4页
Electronic Science and Technology
关键词
电流互感器
取能线圈
副边匝数
电压变换
current transformer
wire loop
secondary turns
voltage conversion
