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ABSTRACT
This paper presents a comprehensive power system model to study the mid-term dynamic response of isolated power systems to large disturbances such as generating unit outages. The interaction of the system with its individual components such as prime-mover and generator including their controllers, frequency and voltage dependency of system loads as well as the transmission network is considered in the described model. This model has been applied on the regional power system in Qatar, where a digital package based on the Advanced Continuous Simulation Language (ACSL) is developed to determine the system response during emergency period after generation outages. The simulation results are used to discuss the following problems:
– How does the generation outage affect the frequency behaviour and power exchange between different network parts?
– How will the voltage level change after such generation deficiency?
– Where and when do the system under-frequencies appear, which exceed protection limitations and therefore lead to load shedding?