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笔者设计了基于互感取能的导线监测传感器电源,该电源利用互感原理,通过取能线圈将高压侧导线上的电能感应到二次低压侧,然后经过整流滤波处理、稳压处理和DC-DC处理后,供在线监测装置使用。基于以上原理做出了具体设计,并且为了应对导线上电流瞬变、电流过大和电流不足等问题,分别采取了加入瞬时过电压保护、过压过流保护和锂电池的措施,其中过压过流保护分为两级,一级针对导线电流正常波动时的保护,另一级针对输电导线异常过流或短路故障时的保护。并搭建实验平台进行测试,最后,用笔者所研制的一种基于该电源的监测装置对其进行了验证。
The author designs a wire monitoring sensor power supply based on mutual inductance and energy utilization. The power supply utilizes the principle of mutual inductance and induces the electric energy on the high-voltage side wire to the second low-voltage side by taking the energizing coil. After rectification and filtering, voltage regulation and DC-DC After processing, for online monitoring device. Based on the above principles, a concrete design was made. In order to cope with the problems of current transients, overcurrent and insufficient current in the wires, transient overvoltage protection, overvoltage overcurrent protection and lithium batteries were adopted respectively. Overvoltage Flow protection is divided into two levels, one for the protection of the normal fluctuations of the wire current, the other for the transmission line abnormal over-current or short-circuit protection. And set up an experimental platform for testing. Finally, a verification device based on this power supply was developed by the author.