Nuclear Magnetohydrodynamic EMP, Solar Storms, and Substorms

In addition to a fast electromagnetic pulse (EMP), a high altitude nuclear burst produces a relatively slow magnetohydrodynarnic EMP (MHD EMP), whose effects are like those from solar storm geomagnetically induced currents (SS GIC). The MHD EMP electric field E < 10^-1 V/m and lasts < 10^2 sec, whereas for solar storms E > 10^-2 V/m and lasts >10^3 sec. Although the solar storm electric field is lower than MHD EMP, the solar storm effects are generally greater due to their much longer duration. Substorms produce much smaller effects than SS GIC, but occur much more frequently. This paper describes the physics of such geomagnetic disturbances and analyzes their effects.Comment: 29 pages, 14 figures, 5 table

Frequency dependent transmission line modeling with grounding representation

Ph.D.Athanasios P. Meliopoulo

Component Monitoring and Dynamic Loading Visualization from Real Time Power Flow Model Data

Abstract: The technology of intelligent electronic devices in power systems has exploded and with it the available real time data. The data are typically used to extract a real time model of the system via traditional state estimation methods. The traditional approach estimates only the system voltages and uses a small part of the available information. This paper presents a new approach for better utilization of the available information. Specifically, we propose the use of existing data for estimating detailed operational models of major power equipment. For example, the detailed models can be in the form of electro-thermal models which then will allow the monitoring of device temperatures, dynamic loading, etc. In general, the real time model can be as simple or as complex depending on the type and quality o