Robert William Delmerico

Dynamic modeling of GE 1.5 and 3.6 MW wind turbine-generators for stability simulations

GE power systems has an ongoing effort dedicated to development of models of GE wind turbine generators (WTG) suitable for use in system impact studies. This paper documents the present recommendations for dynamic modeling of the GE 1.5 and 3.6 MW WTG for use in system impact studies. The paper includes recommended model structure and data, as well the assumptions, capabilities and limitations of the resulting model.

Battery energy storage systems for electric utility, industrial and commercial applications

Voltage depressions and power interruptions are rapidly becoming two of the hottest topics in the field of power quality. Of particular interest is the need to supply a dependable, efficient and controllable source of real and reactive power, which is available instantly to support a large (>0.5 MVA) load, even if the utility connection is lost. This paper describes a versatile solution to this problem for utility, industrial and commercial applications using battery energy storage systems (BESS). BESS have the potential to provide other substantial benefits in terms of improved voltage and energy management in conjunction with this protection from interruptions.

A VRLA battery energy storage system for Metlakatla, Alaska

The emergence of new power electronics and improved battery technology has created renewed interest in battery energy storage systems (BESS). These new systems provide electric utilities with alternatives to conventional storage technologies, such as pumped hydro. BESS has the potential to provide substantial benefits in terms of energy management, improved voltage, spinning reserve and protection from interruptions when compared to large centralized storage. This paper describes a commercial, economically justified, application of the new BESS which is under construction in the Metlakatla Power and Light system. The paper outlines the system performance requirements which lead to consideration of BESS as an option; the economic factors which provided the justification for BESS as an economic alternative; and the overall BES system design and performance.