One phase rural distribution installation with direct connection to HV trunk line

One original application of the distribution network development, based on existing HV network, is presented for the rural electrification of developing countries.
Supply of a few kVA to remote site needs specific installations. We have developed, installed and experimented one practical application from April 17th, 2002 in Makola (Congo-Brazzaville, 30 km far from Pointe Noire).
We have investigated the case where a HV OHL exists in the vicinity of the village. Our application is a one-phase connection to a 220 kV line with a local demand estimated at 50 kVA (about 500 people) in a first step. We have adapted the existing technology of SF6 inductive voltage transformer in order to supply 50 kVA instead of a few VA.
The paper will present the problems met during the design of this specific installation compared to classical substation, and the results of first months of use.