Distributed Power Generation And Distribution Network Protection Coordination

Distributed generation has been widely admitted as an efficient and cleaning power. But the best way to use DG is connected it into distribution network to get complementary advantages.Distribution protection system is designed by way of radial type of a single electrical source, DG's interconnection makes distribution network become network type of many electrical sources, and then bring about protection not to operate normally. The paper sets about this problem to study in order to work out it.The paper makes study according to following structure. The first part explains the background, the existing circumstances and research aims at home and abroad. The second part introduces primary equipments and protection system about the paper in distribution network. The last part discusses emphatically suffered efficiency of distribution network by DG, and then brings forward two means to coordinate the efficiency, i.e. make use of reactor to restrict fault current and restrict level of penetration.