Normally， bus protection is not configured within 10 kV substation system. When bus accident happened， over-current backup protection on transformer's low voltage sides acts to switch off the fault. The act delay may cause partial damage of the primary equipments. The research purpose here is to reduce damage risk of the main transformer and switch box during bus short circuit accident. As a part of 110 kV Dongfang substation automation system modernization project， a generic object oriented substation event（GOOSE） based 10 kV bus protection solution is proposed. Utilizing GOOSE signal transmission among network devices， protection's fast action is fulfilled during accident. The solution has already implemented at Dongfang station from Jan. 28th，2010， and it operates well so far.