High Voltage Distribution System or HVDS

You have learnt previously that significantly high losses take place in the secondary distribution system. This is because of higher current densities and ease of pilferage at low voltages. One of the latest innovations in efforts to decrease technical and commercial losses is the use of HVDS (High Voltage Distribution System) or LT-less system.

In this system, the secondary distribution system along with long LT feeders running up to consumer premises from the distribution substation is totally absent.

The primary distribution system at HT level (11 or 33 kV) is used to reach the nearest point for a group of little number of consumers. The consumers are then linked to the HT Distribution System at these points by small pole mounted transformers used for supplying power to them by LT service lines. We now define the advantages of HT distribution compared to conventional LT distribution system.