WSN-based Monitoring For Overhead Transmission Lines

Power grid is an important infrastructure of the national economy.Transmission lines,as an important part of power grid,is perennial exposed to the air,which make it easily affected by adverse weather and environmental factors and prone to failure.Thus result in power supply disruption,seriously affect the normal life of people,even affect people's life and property safety.In order to guarantee the security of power transmission,it is an urgent task to carry out the omni-directional and multi angle monitoring for the overhead transmission lines and its surrounding environment.Wireless sensor network(WSN),with its low power consumption,low cost,dynamic networking,strong adaptability to the environment and other characteristics,gradually become a hot research topic at home and abroad.In view of the many advantages and the maturity of the technology of WSN,the application of WSN in transmission lines monitoring is of great theoretical value and social significance.This paper focuses on the monitoring of overhead transmission lines,and the main contents of this work are summarized as follows:The first chapter introduces the research background and significance of this paper,and describes the research status at home and abroad of overhead transmission lines monitoring network and clustering algorithm based on WSN.The second chapter introduces the monitoring content and characteristics of overhead transmission lines monitoring network.Considering the actual situation that overhead transmission lines are long chain distribution and combination with the characteristics of monitoring network,a hybrid hierarchical network structure of overhead transmission lines monitoring based on WSN is proposed.and some sink nodes are selected to install the cellular module to achieve the direct communication between sink nodes and control center.The third chapter,in view of the monitoring network will consume a large amount of energy in data transmission phase and monitoring network generally use energy limited battery to supply power,this paper proposes a load balancing clustering algorithm based on gradient.The algorithm is analyzed from four aspects: gradient establishment,cluster head selection,data transmission and cluster head re-selection.Through the establishment of energy consumption model,a detailed analysis of nodes and network energy consumption on the acquisition layer energy is given.In the fourth chapter,according to the delay problem in the process of data transmission in the monitoring network,considering expensive installation and operation costs of the cellular modules,the hybrid hierarchical network structure is modeled as a hierarchical network model.Considering the delay and the cost,the deployment problem of the cellular modules is transformed into an integer linear programming(ILP)problem,and the optimal number of cellular modules can be obtained by solving them.The fifth chapter summarizes the research work and points out the future research direction.