The substation-area protection and control device gets and shares the information about the substation's analogs

binary inputs

binary outputs through a communication network to realize all the substation's protection and control functions. The paper mainly focuses on the hardware and advanced application software implementation of substation-area protection and control. In view of the model's updating and function expansion problem brought about by the restructuring and expansion of substations

a “building block” method is used to achieve flexible expansion of an intelligent electronic device(IED)capability description(ICD)model

and a decoupled method of platform software and application software is used to achieve flexible functions. A Hash algorithm is used to curb the network flow. A pulse per second width adjustment method is proposed based on self-learning of the merging unit sampling sequence number and a non-blocking protection method is used for a single data source getting out-of-step. Meanwhile

a protection scheme of simple busbar protection

switch-onto-fault protection and transformer end fault protection is proposed for optimizing backup protection. The dynamic and data flow simulation results show that the substation-area protection and control device can satisfy the protection requirement on smart substation for its practicality and reliability. This work is supported by State Grid Corporation of China. This work is supported by National High Technology Research and Development Program of China (863 Program) (No. 2015AA050101).