Fast acting load control for power system stability.

摘要

Voltage stability is a subject of great concern in the planning and operation of power systems. As open access market principles are applied to power systems, stability margins have been reduced to respond to market pressures. This has led to events such as rotating blackouts in several power systems, for example, California; and has generally resulted in increased electricity prices. A novel approach to reduce the tension in electrical systems is to establish a Fast Acting Load Control (FALC) program for price and system stability. Using this approach, load can be modelled and controlled similar to a generator, providing spinning reserve.; The thesis will review existing implementations of Fast Acting Load Control. Furthermore, in this thesis, two new Fast Acting Load Control procedures are proposed. One is a Lagrange Based Fast Acting Load Control, which is based on Lagrange multipliers to determine optimal locations and curtailment levels for voltage stability. Another procedure is Optimal Load Curtailment, which includes four techniques to determine the optimal load curtailment schemes for system and cost stability.; The effects of applying these approaches are analyzed using the IEEE 30-bus and IEEE 57-bus test systems.