The effect of Al-Khaleej power plant on the power transfer & transient stability of the Libyan grid

The complexity of power systems is rising, determining the limits of power flow and stability characteristics of a power system has become a significant concern. The behavior of an electrical power system under a sudden or sequence of disturbances when it is functioning in steady state is defined as power system stability .In this paper the effects of connecting Al-Khaleej Power plant into the Libyan national grid is investigated to determine the maximum power flow capability of the network for delivering power from the eastern side (Where power production is in abundance) to the western side (Where power demand is at its highest) and the transient stability is also performed on large-disturbance rotor angle, real power, voltage and frequency of the production units in Zwetina Power Plant.. The grid parameters evolution in time following a large disturbance is analyzed in brief. The Egyptian and Tunisian connection sides are not analyzed in this paper. Whereas load flow calculations and dynamic simulations are done. The load flow results show that maximum power transfer is achieved between both sides of the network when the two generating units were introduced to the active grid, followed by the introduction of one generating unit and lastly, the absence of the power plant provided the least maximum power transfer capability to the system. The Power system stability is analyzed in Zwetina Power plant and in 3 areas in the grid from each primary area: The western area, the eastern are and the southern area. Brega, Khoms switching & El Fjij were chosen respectively to be investigated in this study. Transient stability is maintained in the simulated scenarios and stability is more tuned and contains more timed oscillations in the case of the presence of both generating units in comparison to the model where the generating units were out of the network.