Degree Type


Date of Award


Degree Name

Master of Science


Electrical and Computer Engineering

First Advisor

James D. Mccalley

Second Advisor

Venkataramana Ajjarapu


Wind power installation in U.S. has increased tremendously in 2007, twice as much as the increase in 2006. With more and more wind power being integrated into power systems, it is important to investigate the wind integration effect with respect to increasing wind penetration levels. In the past few years lots much research has been performed in this area.

In this study, two parallel approaches, transient simulation and statistical analysis, are used to study the influence of increasing wind power penetration levels within a power system. Both of these methods support identification of the maximum wind penetration level in an existing power system.

The transient simulation study provides a procedure for modeling user-defined wind generators using PSS/E 29.5 and Compaq Compiler 6.5. Three ways to increase wind penetration level are introduced. Under the same contingencies, a set of simulations is performed to compare the grid frequency response when wind penetration levels are increased from 2% to 8%.

In the statistical analysis, first wind power capacity in each season and month is calculated based on one year wind data. Second, combined load-wind variability is calculated with respect to three time scales: hour to hour, ten-minute to ten-minute, and one-minute to one-minute. Operational suggestions are provided in terms of operation services such as scheduling, load following, and regulation. Finally a storage system that provides a solution for mitigating the increasing load-wind variability when wind penetration level is increased is studied.


Copyright Owner

Shuyang Zhang



Date Available


File Format


File Size

128 pages