Oman/UAE Interconnection Research Papers - Academia.edu (original) (raw)
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The objective of this paper is to assess the impact of interconnecting Oman and UAE power systems through the existing 220kV, 46.7km double circuit transmission line rated 762MVA for each circuit. A model is developed to represent both... more
The objective of this paper is to assess the impact of interconnecting Oman and UAE power systems through the existing 220kV, 46.7km double circuit transmission line rated 762MVA for each circuit. A model is developed to represent both systems of Oman and UAE based on EUROSTAG© software. Load flow and contingency studies are presented to evaluate the compliance of the interconnected system for security criteria N and N-1. Calculations are applied to two operating conditions (peak and minimum load) and for three energy exchange cases: no exchange and maximum exchanges in both directions. Short circuit studies are presented to show that breaking capacity of existing circuit breakers is not exceeded following the interconnection of the two systems, especially at the interconnector and neighboring substations. The 3-phase short-circuit at the main 400kV, 220kV and 132kV substations have been calculated according to the IEC 909 Standard in peak load conditions. Transient stability studie...
SUMMARY The objective of this paper is to describe the various measures investigated to secure the behaviour of Oman-UAE interconnected power system when facing large disturbances. When occurring, the activation of the defence plan... more
SUMMARY The objective of this paper is to describe the various measures investigated to secure the behaviour of Oman-UAE interconnected power system when facing large disturbances. When occurring, the activation of the defence plan maintains or restores the stability of the interconnected system but also to limit the spreading of the disturbance or the instability phenomena to large portions of the power system. The main defence plan and emergency actions of concern are: • Defence actions against frequency instabilities which lead (most of the time) to the activation of the Under Frequency Load Shedding (UFLS). The paper assesses the need to harmonize the two existing UFLS plans to avoid unnecessary power transfer during transients involving the activation of UFLS plans. • Defence actions against loss of synchronism which could take place following various circumstances such as the occurrence of faults with delayed clearing or uncontrolled development of undamped power swings between various parts of the interconnected system. The most common loss of synchronism defence action is the detection and splitting of the portion of the system that lost synchronism. In the frame of the Oman-UAE interconnection, it would consist of the disconnection of the interconnector or the portions of the system that would have lost synchronism. A large number of severe contingencies have been simulated to locate the coherent group of generators following a loss of synchronism. These have been achieved by the simulation of 3-phase faults cleared in backup time close to 220 kV substations leading to the loss of two circuits or one 220 kV circuit and one transformer. The cases leading to the loss of synchronism of a set of generators have been detected. These cases should be addressed with adequately located and tuned out of step protections. In some situations the system splits into two or more coherent groups of generators. Simulations of faults cleared in backup time have shown that in very unlikely Oman exporting situations, the transmission system or part of it may lose synchronism with respect to the UAE system.
The objective of this paper is to assess the impact of interconnecting Oman and UAE power systems through the existing 220kV, 46.7km double circuit transmission line rated 762MVA for each circuit. A model is developed to represent both... more
The objective of this paper is to assess the impact of interconnecting Oman and UAE power systems through the existing 220kV, 46.7km double circuit transmission line rated 762MVA for each circuit. A model is developed to represent both systems of Oman and UAE based on EUROSTAG© software. Load flow and contingency studies are presented to evaluate the compliance of the interconnected system for security criteria N and N-1. Calculations are applied to two operating conditions (peak and minimum load) and for three energy exchange cases: no exchange and maximum exchanges in both directions. Short circuit studies are presented to show that breaking capacity of existing circuit breakers is not exceeded following the interconnection of the two systems, especially at the interconnector and neighboring substations. The 3-phase short-circuit at the main 400kV, 220kV and 132kV substations have been calculated according to the IEC 909 Standard in peak load conditions. Transient stability studie...