适用于输电线路监测的自供电无线在线监测系统

高空输电线路的实时在线监测对于电网安全可靠运行非常重要，然而输电线路在线监测系统的传统电源供给方式如感应取电、太阳能等方式，难以满足实际应用场景的需求。提出一种基于电磁-压电-摩擦纳米发电机的混合式自供电能量收集方法，将输电线路振动能转换为电能为在线监测系统供电，同时采集输电线路温度、弧垂、微风振动信息，无线发送至终端服务器，实现对电网线路的实时监控预警。系统包括复合能量收集器、电源管理模块、传感监测模块、无线通信模块、数据分析与处理模块等，实现低功耗自供电感知、无线数据收发、电磁屏蔽、数据分析与展示及实时监控预警等多项功能。系统收集环境振动能实现自供电传感，结合无线传输互联网技术形成的无线输电线监测网络实时性强、监测效率高，对提高国家电力系统的稳定性和可靠性具有非常重要的意义。

Self-powered Wireless Online Monitoring System for Electric Transmission Lines

Real-time online monitoring of transmission lines plays a very important role in the safe and reliable operation of state grids. However, the traditional power supply methods of online real-time monitoring system for transmission lines, such as induction power, solar energy, etc., are difficult to meet the needs of actual application scenarios. A hybrid self-powered energy collection method based on electromagnetic-piezoelectric-triboelectric nanogenerators was proposed, which converts the vibration energy of the transmission line into electrical energy to supply power to the online monitoring system. At the same time, the temperature, sag, and breeze vibration information of the transmission line is collected and sent to the terminal server wirelessly to realize real-time monitoring and early warning of the transmission lines. This system consists of a hybrid energy harvester, power management module, sensor module, wireless module, data analysis and processing module, etc., which realizes many functions, such as low-power self-powered sensing, wireless data transceiver, electromagnetic shielding, data analysis and display, real-time monitoring and early warning and so on. This system collects environment vibration to realizes self-powered sensing, combined with wireless transmission and IT, it forms a wireless transmission line monitoring network which has the advantages of strong real-time performance and high monitoring efficiency. It is of great significance in improving the stability and reliability of state grid.