PR90363

BEIJING, June 29, 2021 /PRNewswire=KYODO JBN/ --

State Grid Corporation of China (SGCC) has made new technological breakthroughs

in direct current (DC) power distribution with Pangdong DC central station put

into service on Tuesday by State Grid Jiangsu Electric Power Co., Ltd, a

subsidiary of SGCC.

Functioning for AC/DC conversion and power distribution, the Pangdong station

acts as one of the two "hearts" for State Grid Jiangsu's demonstrative low and

medium voltage (LV/MV DC) distribution project, which is expected to become a

world leading LV/MV DC distribution system with the largest scale, complete

voltage levels as well as latest technical equipments when completed this

August.

Listed as a national key R&D project in 2018 with construction kicked off last

May, the demonstation project is applied and undertaken by State Grid Jiangsu.

It has built two DC central stations ("hearts") in Pangdong and Jiuli within

Wujiang Economic Development Zone in Suzhou city of east China's Jiangsu

province to construct a LV/MV DC system covering various scenarios such as

municipal, industrial and commercial, and household uses. With accumulative DC

load of 10.5MW, the system is capable of different DC output at 10KV, 750V, and

375V for meeting different power demand.

The newly-commissioned Pangdong station, for example, could convert 10KV AC

into 10KV DC, and deliver, upon demand, different voltage level DC through a

transformer, according to Yang Chen, deputy director of the operation and

inspection department with State Grid Suzhou Power Supply Company under State

Grid Jiangsu.

The Pangdong station is also the control center of the entire distribution

system, said Yang, noting that power supply can be restored within 100

milliseconds in case of network failure thus increasing power supply

reliability rate to 99.999 percent with latest control system and coordination

system.

It is noted that the project so far has made breakthroughs in areas of system

planning and design, key equipment development, operation control technology

and system protection technology, with 93 patents accepted, 12 software works

registered, as well as 6 domestic and foreign standards compiled.

The demonstration project is expected to explore the construction, operation

and maintenance model for integrated DC power distribution and use, and provide

experience for global energy transformation and power consumption changes,

according to Yuan Dong, deputy director of the equipment department of State

Grid Jiangsu.

See the original link: https://en.imsilkroad.com/p/322415.html  

SOURCE: Xinhua Silk Road

Image Attachments Links:

   Link: http://asianetnews.net/view-attachment?attach-id=394921

   Caption: Photo: Staff of State Grid Suzhou Power Supply Company starts power

transmission of No. 1 converter valve for Pangdong central station on June 29,

2021 in Suzhou, east China's Jiangsu province.