Research On Service Scheduling In Smart Distribution Grid

With the development of smart grid technologies,the intelligentization of distribution power grid has entered the stage of deepening application.As a result,the extended breadth and depth of interaction with the smart grid user imposes a challenge on information and communication infrastructure of smart grid At present,the electric power communication network backbone has been built perfectly,and the research and construction of communication access network is in urgent need.Endowed with faster deployment,larger coverage,and more economical investment,wireless communication can meet the increasing communication needs of the future smart grid.In this paper,a comprehensive research is conducted on wireless resource allocation and user scheduling for private wireless network of smart grid,combined with spectrum policy,existed wireless technologies and networking strategy for smart grid.Secondly,research is carried out by considering the new generation private wireless communication network as the secondary user cognitive radio system.Based on such system model,we investigate the relationship between the accuracy of spectrum sensing and sensing period.Then,The system is proposed to retransmit data to improve the reliability of the secondary user’s services and maximize overall data throughput of the whole system,which guarantees the high reliability of the overall system.Then,to overcome implement issues such as limited spectrum resource,growing communication needs of smart grid,the communication requirements for distribution power grid are analyzed specifically and the 1.8GHz private wireless communication network is proposed to be built to fulfill the requirements associated with a quasi-static resource allocation scheme which guarantees the communication quality and fairness of smart grid users.Finally,due to the asymmetric nature of uplink and downlink services of smart grid and the scarcity of spectrum in electric power communication,an underlay spectrum access scheme is proposed to solve the problem.Uplink massive smart grid users are allowed to reuse frequency resources of downlink critical smart grid users in the downlink phase.Based on such model,the scheme aims at maximizing the overall throughput of massive smart grid users while providing a-minimum data rate for each critical smart grid user.