Abstract:  With the development of energy Internet, intelligent substation in smart grid has been developed rapidly, and the distribution layout of relay protection device has become an inevitable trend. In order to deal with the intelligent substation relay protection decentralized arrangement, information remote control and other issues, this paper puts forward local relay protection scheme for substation based on wireless networks for industrial automation (WIA). According to the characteristics of the substation, the industrial wireless communication system is applied to the local relay protection control station of substation, which can monitor the substation locally installed device. We develop the wireless communication module for substation, and carry out the laboratory test and field test, while, the experimental results show that the proposed scheme can achieve high reliable and real-time transmission in complex environment, which has a certain reference value for the follow-up study of local relay protection in intelligent substation. 

Key words: relay protection, locally installed, wireless access, reliability, real-time