Incorporation of Electromagnetic Transients into Power System Analysis in Planning and Operation Support for Next Generation Power Grid

摘要

Electromagnetic transients (EMT) could be of important concern for the next generation power system due to increasing number and type of switching operations associated with smart grids. KMT-type analysis has been used to determine component ratings, energy absorption capabilities, designing optimal switching process, testing protection systems, etc. Due to the complexity of the modeling and difficulties of accessing the detailed system and operation data, EMT-type analysis is a very time-consuming process thus normally only used in some particular cases. Techniques and approaches for a system-wide EMT-type analysis is still much desired. Recent advances in development of computational algorithms enable automated execution of EMT-type analysis. These new advances can be conceived as new techniques for large-scale system-wide analysis. In this paper, based on some experiences of power system restoration analysis with the automated techniques, we first shows that the techniques can identify some potential issues or operational difficulties ahead of time otherwise will be difficult to foresee. Based on the fact that offering intensive off-line studies and real-time applications are made possible, we then put forth a discussion on how they may be conveniently developed to support compliance studies required by NERC, similar to steady-state power flow computation, to address some concerns of the next generation power grid. Electromagnetic transient; switching operation; power system analysis; system restoration; power system planning; real-time operation.