China's First Digital DC Microgrid Substation Mutual AidDemonstration Project in the Expressway Service Area Undertaken by China Energy Engineering　Group Guangdong Power Engineering Co.,Ltd. Started Construction.

On November 10,　China’sfirst　digital　DC　microgrid　substation　mutual　aiddemonstration　project　in　the expressway service　area　undertaken　by　China　Energy　Engineering　Group　Guangdong　Power　Engineering　Co.,Ltd.–The PowerSource,　Grid,　Loadand Energy　Storage　IntegratedCharging　Facility　Projectat Dahuai　Service　Area　of　Shenyang-HaikouExpressway-was officially put into construction.　,Once　completed　and　pur　into　use,　the　project　will　add　84　charging　spaces　in　both　the　east　and　west　sections　of　the　Dahuai　Service　Area.　The　newly　built　charging　facilitywill　feature　charging　guns　with　an　average　power　output　exceeding　72　kilowatts/per　gun,　and　among　them,　there　are　seven　600A　liquid-cooled　supercharging　gunscapable　of　achieving　the　fastest　charging　speedofup　to　"one　kilometer　per　second."

The　project　will　also　serve　as　a　pilot　for　cutting-edge　technologies,　including　megawatt-level　power　electronic　transformers　and　DC　inlet　wire　charging　piles.　Through　the　use　of　new　flexible　interconnection　technology　for　DC　bus,　it　will　establish　a　DC　microgrid　within　the　service　areaandwill　lead　the　way　in　enabling　DC　mutual　aidbetween　different　substations　in　the　service　areas　on　both　sides　of　the　expressway,　enhancing　efficiencybymore　than　5%　compared　to　the　traditional　AC　coupling.　Such　abreakthrough　will　significantly　alleviate　the　"tidal　charging"　problem　that　has　troubled　thenew　energy　vehicle　owners　traveling　along　the　expresswayduring　majorholiday　periods.