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A review of intertie protection

Many industrial facilities will have on site generation and it is important that the facility design its protection and control system to protect the interconnection between the facility and the utility supply. This paper is a tutorial on the protection necessary to protect the utility from issues within the industrial facility and to protect the facility from issues on the utility supply. Topics to be discussed will include: directional power elements, directional overcurrent elements, load shed schemes and contingency schemes, and utility reclosing schemes.