To suppress the charge accumulation on the spacer surface in direct current(DC)gas insulated transmission line(GIL)is an important and emergent issue for the development of a clean,safe and economic smart grid.A desig...To suppress the charge accumulation on the spacer surface in direct current(DC)gas insulated transmission line(GIL)is an important and emergent issue for the development of a clean,safe and economic smart grid.A design method of the DC spacer is proposed,and a spacer prototype is prepared and evaluated both by simulation and type test.The DC withstand voltage test and polarity reversal test are performed using the new DC spacer compared with a commercialised 220 kVAC spacer.The simulation results indicate that the surface electric field and surface charge of the DC spacer are lower than those of the alternating current(AC)spacer under DC voltage.The test results verify that the surface flashover voltage of this DC spacer is higher than that of the AC spacer.The potential feasibility of the spacer design for HVDC is discussed.It is hoped that the content of this paper can bring new ideas in the development of HVDC gas insulated equipment.展开更多
The 2050 carbon-neutral vision spawns a novel energy structure revolution,and the construction of the future energy structure is based on equipment innovation.Insulating material,as the core of electrical power equipm...The 2050 carbon-neutral vision spawns a novel energy structure revolution,and the construction of the future energy structure is based on equipment innovation.Insulating material,as the core of electrical power equipment and electrified transportation asset,faces unprecedented challenges and opportunities.The goal of carbon neutral and the urgent need for innovation in electric power equipment and electrification assets are first discussed.The engineering challenges constrained by the insulation system in future electric power equipment/devices and electrified transportation assets are investigated.Insulating materials,including intelligent insulating material,high thermal conductivity insulating material,high energy storage density insulating material,extreme environment resistant insulating material,and environmental-friendly insulating material,are cat-egorised with their scientific issues,opportunities and challenges under the goal of carbon neutrality being discussed.In the context of carbon neutrality,not only improves the understanding of the insulation problems from a macro level,that is,electrical power equipment and electrified transportation asset,but also offers opportunities,remaining issues and challenges from the insulating material level.It is hoped that this paper en-visions the challenges regarding design and reliability of insulations in electrical equipment and electric vehicles in the context of policies towards carbon neutrality rules.The authors also hope that this paper can be helpful in future development and research of novel insulating materials,which promote the realisation of the carbon-neutral vision.展开更多
基金The National Key R&D Program of China,Grant/Award Number:2018YFE0200100The National Natural Science Foundation of China,Grant/Award Number:51921005。
文摘To suppress the charge accumulation on the spacer surface in direct current(DC)gas insulated transmission line(GIL)is an important and emergent issue for the development of a clean,safe and economic smart grid.A design method of the DC spacer is proposed,and a spacer prototype is prepared and evaluated both by simulation and type test.The DC withstand voltage test and polarity reversal test are performed using the new DC spacer compared with a commercialised 220 kVAC spacer.The simulation results indicate that the surface electric field and surface charge of the DC spacer are lower than those of the alternating current(AC)spacer under DC voltage.The test results verify that the surface flashover voltage of this DC spacer is higher than that of the AC spacer.The potential feasibility of the spacer design for HVDC is discussed.It is hoped that the content of this paper can bring new ideas in the development of HVDC gas insulated equipment.
文摘The 2050 carbon-neutral vision spawns a novel energy structure revolution,and the construction of the future energy structure is based on equipment innovation.Insulating material,as the core of electrical power equipment and electrified transportation asset,faces unprecedented challenges and opportunities.The goal of carbon neutral and the urgent need for innovation in electric power equipment and electrification assets are first discussed.The engineering challenges constrained by the insulation system in future electric power equipment/devices and electrified transportation assets are investigated.Insulating materials,including intelligent insulating material,high thermal conductivity insulating material,high energy storage density insulating material,extreme environment resistant insulating material,and environmental-friendly insulating material,are cat-egorised with their scientific issues,opportunities and challenges under the goal of carbon neutrality being discussed.In the context of carbon neutrality,not only improves the understanding of the insulation problems from a macro level,that is,electrical power equipment and electrified transportation asset,but also offers opportunities,remaining issues and challenges from the insulating material level.It is hoped that this paper en-visions the challenges regarding design and reliability of insulations in electrical equipment and electric vehicles in the context of policies towards carbon neutrality rules.The authors also hope that this paper can be helpful in future development and research of novel insulating materials,which promote the realisation of the carbon-neutral vision.
