Showing papers by "Thomas J. Overbye published in 1995"
TL;DR: In this article, the degree of unsolvability is quantified using the distance in parameter space between the desired operating point and the closest solvable point, and the sensitivity of this measure to different system controls is then calculated.
Abstract: As power systems become more heavily loaded, system operation will be increasingly constrained by contingent cases where the power flow equations have no real solutions. Since such cases often represent the most severe threat to power system operation, it is critical that a computationally efficient method be developed to provide optimal control recommendations to mitigate these cases. Such an algorithm is developed in this paper. The degree of unsolvability is quantified using the distance in parameter space between the desired operating point and the closest solvable point. The sensitivity of this measure to different system controls is then calculated. These sensitivities are used to determine the best way to mitigate the contingency. The dynamic consequences of loss of solution are also discussed. The method is demonstrated on a small system and the IEEE 118 bus case. >
118 citations
TL;DR: A user-friendly power simulation program for teaching power system operations and control that uses data files and option windows to simulate a wide variety of different power systems and operating problems.
Abstract: This paper describes a user-friendly power simulation program for teaching power system operations and control. The motivation for the development of the program is to provide students with a simple and useable tool for gaining an intuitive feel for power system operations. This Microsoft Windows based program simulates power system operation over a specified time period (of typically several hours to a day). Students dynamically interact with the simulated system through various windows, including a one-line display. The use of data files and option windows allows the program to simulate a wide variety of different power systems and operating problems. Efficient programming results in a modest program size of just 450 k, allowing for easy distribution to students.
74 citations
01 Jan 1995
TL;DR: A user-friendly power simulation program for teaching power system operations and control that uses data files and option windows to simulate a wide variety of different power systems and operating problems.
Abstract: This paper describes a user-friendly power simulation program for teaching power system operations and control. The motivation for the development of the program is to provide students with a simple and useable tool for gaining an intuitive feel for power system operations. 'This Microsoft WindowsTM based program simulates power system operation over a specified time period (of typically several hours to a day). Students dynamically interact with the simulated system through various windows, including a one-line display. The use of data files and option windows allows the program to simulate a wide variety of different power systems and operating problems. Efficient programming results in a modest program size 'of just 450k, allowing for easy distribution to students.
1 citations
28 Sep 1995
TL;DR: In this paper, the authors present a computationally efficient method for emergency system control following such an event, which only needs information typically available from a state estimator; it does not require the user to supply detailed models of system dynamics.
Abstract: Restructuring in the electric power industry will result in system operation at higher levels of loading, increasing the potential for voltage instability due to a saddle node bifurcation. In this paper we present a computationally efficient method for emergency system control following such an event. The method only needs information typically available from a state estimator; it does not require the user to supply detailed models of system dynamics.