Transient Stability Analysis of Hybrid Wind Turbine System Integrated To Utility Grid (original) (raw)
Future distribution networks will consist of many networks with distributed generations connected or commonly named micro grid. Application of wind turbine as distributed generation in micro grid, can be operated in stand-alone mode, hybrid or integrated with grid. All of those operation mode require stability analysis to ensure the safety of their operations. This stability analysis, transient stability particularly is important to be analyzed, to know the system's ability to maintain synchronization and value of the voltage and frequency after disturbances such as loss of grid connection, short circuit and starting process of generator or motor. Moreover, by performing this case of study, the electricity system operator of distribution network can determine the best solution to do in the event of disturbances which can cause instability in micro grid system. Based on average annual wind speed data in Indonesia, wind turbine is more effective to be operated in hybrid mode and integrated with grid. Besides, reliability and operation cost aspect are its consideration also. For simulation purpose, ETAP 7.0 is used to simulate transient stability study in distribution network of Basuki Rahmat 20 kV, North Surabaya, which is connected to wind turbine and diesel generator. The objective function of this paper is determine best load shedding mechanism to maintain system stability and synchronism under several cases, such as loss of utility grid connection, loss of wind power connection, loss of diesel generator connection, loss of both distributed generations connection and short circuit on one of load bus.
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