Application And Research Of Uninterruptible Power Bypass Maintenance Technology Based On Mobile Substation

With the development of economy and city,the reconstruction requirements of urban power network are contradicted against the users' requirements of uninterrupted power supply and the requirements of major electrical safeguard activity,the bottleneck of the traditional power-off maintenance mode has become more and more obvious.Mobile substation as an extension of smart grid can effectively protect the safe operation of urban power grid based on its mobility and fast in the period of power grid upgrading and reconstruction?sudden failure of equipments?high loads season.Based on the 110 k V vehicle-mounted mobile substation of YincChuan power supply company,the paper introduces Hybrid Gas Insulated Switchgear(H-GIS)?20MVA vehicle-mounted mobile transformer?Mid&Low Volgate gas-filled switchgear?monitoring and protection systems?integrated power system and transportation vehicle system etc.It analyzes the application types and selection of mobile substation,presents some special structure of mobile substation,such as the vehicle,the problem of height limit,limited width and weight limit.The theise focuses on the combined application mode of the uninterruptible power bypass maintenance technology based on vehicle-mounted mobile Substation and the typical analyses of combination application,builts the mode of the uninterruptible power bypass maintenance technology based on vehicle-mounted mobile substation,probes into the feasibility of task oriented virtual management mode,dispatching and controlling access,operation and maintenance which are in the mobile substation application.As the vehicle-mounted mobile substation used in GuangHua transformer substation of Yinchuan power supply company for reconstruction and application,the paper analyzes the solutions of typical mode selection,load transfer and docking,first and secondary systems docking and more,presents the technology innovation and achievement,evaluates the safety benefit and economic benefit of the new technology.The research of uninterruptible power bypass Maintenance Technology based on Mobile Substation further extend the traditional power grid maintenance mode.With the safe and efficient alternative operating system,we can effectively solve the reliability of power supply in the power demand for the regional sudden emergency and high load season,large-scale blackout,natural disaster,rapid recovery of sudden failure of equipments and other conditions,keep the coordinated development of urban and power grid,gradually carries out the change from the power-off maintenance mode to the power-on maintenance mode.