Study on communication channel reconstruction based on WSN for wide area protection

When extreme grid disasters occur,communication outage is often caused by OPGW damage so that the main protections even lines will fail.Similar problems can occur in the wide area protection(WAP).In this paper,a novel communication channel reconstruction scheme based on wireless sensor network(WSN) of WAP is proposed to solve the above problem.The system structure and characteristic of WSN are introduced,the superiority of communication way on WSN for protection,compared with the traditional way of communication,is analyzed,and the key technology including router protocols,data reliability,data fusion and time delay are discussed.Combined with pilot current differential protection,the paper tests data transmission experiments with different load factors,and applies the test results to simulation experiment of WAP.The simulation results show the scheme of emergency communication channel reconstruction based on WSN can satisfy the need of WAP and serve as the communication channel of main protection when its action performance requirements can be reduced appropriately under extreme grid disaster.