Substation Area Protection

This chapter introduces two substation area protection schemes, which are based on the upload of protection operational logical signals and global electrical variables respectively, and which could simplify the cooperation between different protection devices in traditional current protection and reduce the operational time of backup protection. In the substation area protection scheme based on logical variables, the operational information of current protection is fused, and the effective protection range of current protection on the component is quantified. The proposed scheme could deal with information loss and error, with good adaptability and fault tolerance. Through coordination between multi‐level trans‐space differential regions, the substation area protection based on electrical variable information is fault tolerant and could isolate the fault quickly and selectively, thus improving the performance of substation component protection.