To explore the future of domestic medium voltage DC transmission（MVDC）market

this article through the 10 kV DC pilot project of Aachen University campus in Germany. A medium voltage DC transmission system which is independently manufactured by China XD with all the intellectual property rights is introduced. The system adopted the completely independent design of the modular air cooling light triggered thyristor（LTT）

foil winding dry-type converter transformer and control & protection system of fully digital interface. The system is compact

high reliability

easy maintenance and has the conditions of demonstration project application. This paper also makes the technical and economic analysis about the medium voltage DC transmission

the results show that medium voltage DC transmission（MVDC）is highly competitive in the distribution demand for the AC distribution capacity limited urban load center

remote cable delivery area

load region with distributed generator or large DC capacity.