Research On Dynamic Lightning Protection Technology And Auxiliary Lightning Protection System Of Intelligent Distribution Network

At present,the traditional distribution network has gradually developed into an intelligent and automated active distribution network,because a large number of distributed power sources has been integrated into distribution network.At the same time,a large number of new flexible loads have also been integrated into the grid,which change the traditional distribution network’s grid structure and operation.The impact of thunder and lightning on the distribution network is also increasing,especially for smart distribution networks,thunder and lightning have a huge impact on the intelligent equipment in the power grid and the stable operation of the power grid.Therefore,studying the lightning active protection strategy of the smart distribution network is of great significance for improving the safe and stable operation of the distribution network and the entire regional power grid.According to the actual needs of lightning protection in the Suzhou area,this paper conducts research on lightning detection and dynamic lightning protection strategies for smart distribution networks.By receiving lightning sensor signals in a small area covered by the distribution network,lightning electromagnetic radiation information is obtained to realize lightning warning,and then Realize dynamic lightning protection scheduling.(1)Studying the lightning detection and early warning of the intelligent distribution network.Based on the analysis of lightning characteristics,in-depth study the realization principle of lightning broad-spectrum sensing and frequency-division detection technology,and analyze the lightning low-frequency radiation,high-frequency radiation,and lightning time-domain waveforms The application of differential and complex mode induction lightning sensing technology in lightning detection devices;at the same time,it studies the omnidirectional 360-degree detection and early warning in the detection and early warning area,and builds a multi-source data-based intelligent distribution network classification early warning method to realize the classification detection of lightning Early warning.(2)Combined with the lightning classification warning information of the intelligent distribution network,the dynamic lightning protection design of the intelligent distribution network is carried out.Study the operating characteristics and nonlinear coordinated control measures of distributed power sources and microgrids under thunder and lightning weather conditions,and realize distributed power generation and microgrids from passive network control methods to active adjustments,so that the main network and each microgrid can be real-time Participate in the optimization and stable adjustment of the system to realize the dynamic lightning protection coordinated control based on the microgrid and the active lightning protection of the intelligent distribution network.(3)The software and hardware design requirements of the lightning detection system are introduced,and the overall functional architecture of the designed lightning detection device is analyzed.For the designed lightning detection system,its composition is introduced from two aspects: software architecture,hardware architecture and design,focuses on the implementation of hardware device modules,antenna modules,data processing modules,system program development,data,etc.(4)Build a dynamic lightning protection system for the intelligent distribution network and conduct system tests,analyze the operation mode of the lightning sensor and the system operation interface,then debug the output of the sensor,and test the function,compatibility and performance of the entire system,showing that The system’s detection function,early warning function,omnidirectional function,system self-check function,and automatic backup function are intact.