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Fluctuation of mechanical power is known to be one of many major factors affecting stability of a power plant and the power system network connected to it. The occurrence of this fluctuation is due to the inconsistent input supply to the prime mover, mechanical failure and control system itself such as the process of quick operation of steam turbine governing, which would cause the pressure oscillation...
Instability in the system may cause the rotor angle of the machine to accelerate or decelerate depending on the mechanical power and electrical power; most seriously could result to tripping of the machine This paper evaluates the impact of disturbances and types of loads to system stability using Area-based COI-referred Transient Stability Indexes: COI angle and COI speed. The analysis is carried...
Under frequency load shedding is implemented to restore power system frequency stability if system frequency drops below the operational set point during major disturbance such as lost of generation. Different countries/utility companies have their own philosophies in implementing the under frequency load shedding scheme. Generally, it is based on country/utility requirements, e.g. the overall power...
Modern power system network are usually operated to its maximum capabilities. This in turn would expose the system towards possible voltage instability condition. Coupled with peak load condition where lines can be loaded to its limit, probable scenarios relating to voltage instability could lead to tripping of overload lines which would then lead to possible cascading tripping; ultimately lead towards...
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