Protection configuration research in distribution network with distributed generation

After DGs are joined in the distribution network, a series of protection problem is brought out. The cooperation of now current protection, un-conspicuous fault character at DG and problem of drop-fuse are analyzed in the paper. In order to cope with the protection problems, the protection key is indicated in the paper. Protection configuration with communication and protection configuration without communication are presented in the paper. As a result, the fiber direction protection and the intellectualized feeder protection suit to the distribution network with DGs.