Research on Real-time Condition Monitoring and Dynamic Capacity-increase of Transmission Lines

Smart grid emphasizes identifiability, controllability, unified coordination ability, safety and stability of power grids. In the process of building smart grids, the requirements of transmission lines are mainly reflected in two aspects: state monitoring and transmission capacity of line. Realizing the monitoring of transmission line status, could timely discover hidden failure of transmission line and reduce the number of power failure, ensuring safe and stable operation of transmission lines. The excavation of the transmission capacity is reflected in timely adjustment of the current capacity to maximize the capacity of the transmission line. This paper proposed from the demand of smart grid construction, and combine the output status information of smart substation to realize the real-time status monitoring of transmission lines, and then supporting the condition maintenance of transmission lines and improving the management level of transmission assets. At the same time, through the on-line monitoring of the line temperature and the meteorological environment of the transmission line, comprehensively collect data for calculation analysis and verification to achieve the purpose of dynamic capacity-increase of the transmission line.