George Gross | University of Illinois at Urbana-Champaign (original) (raw)

Papers by George Gross

International Journal of Electrical Power & Energy Systems, 1991

2006 IEEE Power Engineering Society General Meeting, 2006

IEEE Transactions on Circuits and Systems, 1976

The simulation of the transient response of a large interconnected power system involves the solu... more The simulation of the transient response of a large interconnected power system involves the solution of a very large system of differential-algebraic equations under a great variety of initial conditions and disturbances. The demands imposed on a digital transient stability program to i) study larger power system interconnections, ii) provide a more detailed representation of the power system components, and iii) permit the simulation of longer time periods, have the effect of increasing the computing time. The importance of, and the need for, efficient computational schemes is apparent. The method presented in this paper makes detailed use of the structural properties of the differential-algebraic system representation. The nonlinear differential-algebraic system is split into a nonstiff part with long time constants coupled to a stiff part with a sparse Jacobian matrix whose longest time constant is shorter than that of the first part. These two parts are linear in their respecti...

Urbana, Ill. : University of Illinois, Department of Electrical and Computer Engineering,, 2007

2020 IEEE Energy Conversion Congress and Exposition (ECCE), 2020

conducting research on challenges facing the electric power industry and educating the next gener... more conducting research on challenges facing the electric power industry and educating the next generation of power engineers. More information about PSERC can be found at the

Proceedings of the Annual Hawaii International Conference on System Sciences, 2020

IEEE Transactions on Power Systems, 2016

Proceedings of the 41st Annual Hawaii International Conference on System Sciences (HICSS 2008), 2008

Proceedings of the Thirtieth Hawaii International Conference on System Sciences

IEEE Transactions on Power Systems, 1994

This paper presents a new rigorous and efficient algorithm to model a very general class of dispa... more This paper presents a new rigorous and efficient algorithm to model a very general class of dispatch constraints in production cost simulations based on the equivalent load method. The facet algorithm is based upon two observations: the equivalent load production cost calculation is a linear program, which can incorporate dispatch constraints as additional linear inequalities; it has a special structure

IEEE Power Engineering Society. 1999 Winter Meeting (Cat. No.99CH36233), 1999

United States Government. The views and opinions of authors expressed herein do not necessarily s... more United States Government. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by its trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Transmission System Operation and Interconnection

– We present an incentive scheme to stimulate investment in the improvement/expansion of the tran... more – We present an incentive scheme to stimulate investment in the improvement/expansion of the transmis-sion network in the competitive market environment. The formulation of these incentives is based on a decentralized transmission asset investment model and is derived from the value added to the social welfare by an asset invest-ment. In the formulation, we view each potential investor as a player in a cooperative game and we use the unique solution provided by the Shapley value to allocate the payment to each successful investor commensurated with the increase in social welfare the investment brings to the system. The formulation brings valuable insights on the transmission investment topic. We apply the proposed methodology to the Garver 6-bus system to illustrate the capabilites and flexibility of the scheme and to gain in-sights into the development of network improvements through the formulation proposed.

Under normal operating conditions, induction motors perform at levels below their optimum efficie... more Under normal operating conditions, induction motors perform at levels below their optimum efficiency. A control loop that includes a power electronics circuit drive and the induction motor can be developed to reduce power losses in the motor. By measuring the instantaneous power and voltage/frequency characteristics of the motor, a converter can be used to internally adjust the optimum voltage/frequency ratio. This ratio is defined as the ratio that uses minimum power for desired torques and speeds. The control loop will allow the converter to continuously monitor and adjust the motor's characteristics around an optimal operating point. Research will include theory, design, and implementation of the control technique mentioned above.