Accurate computation of power system transients

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This project is for conducting research on the accurate computation (simulation) of power system transients. The targeted field of research is the computation of electromagnetic transients (EMT) using circuit based models of power systems. The simulation and analysis of EMTs is crucial to the operation of an efficient, reliable and environmentally friendly power system. The EMT simulation tools are used for the determination of component ratings such as insulation levels and energy absorption capabilities, in the design and optimization process, for testing control and protection systems and for analyzing power systems in general.****The findings of this project will impact on the accuracy of EMT-type computation methods. Two main aspects are investigated.*******On the first aspect it is proposed to increase the accuracy in the computation of initial conditions. Such conditions establish the steady-state operating point of a power system before performing transient analysis. Although steady-state initialization methods are currently available, it is proposed to develop new techniques capable to account more accurately for harmonics, control systems and various power electronics based devices. It is also proposed to study methods for finding more than one steady-state solution in the presence of nonlinearities. This research will allow to reduce engineering efforts and delays, and significantly improve simulation capabilities for complex problems, such as geomagnetic disturbances and integration of wind generation.*******On the second aspect, it is proposed to conduct research on accuracy problems related to interfacing of electrical network equations with control block diagrams, generic mathematical tools, and external models. Currently, such interfacing is typically based on approximations that often result into errors and/or require increased computing timings. In addition to modeling accuracy and flexibility, this research will have an important impact on modeling portability problems between EMT-type applications. This research will contribute methods that will allow accurate open-source and black-box model exchange among different simulation platforms and will facilitate engineering work flow. The proposed research on open-source modeling will lead to standardization and deliver important means for maintaining modeling consistency to research and industry.*******This research program will impact on Canadian power system utilities by delivering computational techniques capable of solving analysis problems that cannot be solved today. Canada is also a world leader in the development and supply of advanced simulation tools for power systems and this research will contribute new numerical methods that can be advantageously used by related software development companies.***