Dynamic Stability Analysis of Renewable Energy Sources Interconnected to the Power System Networks and Compliances to the Australian Grid


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Abstract


In the current climate and environmental change, wind energy will not only be able to contribute to securing Australian energy independence and climate goals in the future but also it could turn a serious energy supply problem into an opportunity in the form of commercial benefits, technological research and employment. The aim of this paper is to analyse the dynamic behaviour of the GE wind turbine with Zero Power Mode (ZPM) characteristics connected to a weak power system and short transmission distance to the power grid, in terms of its stability following credible faults and its impact on export and import capability. Various system faults have been simulated to demonstrate the impact of wind energy on the system. Studies show that for all faults under most scenarios, the system remains stable and well damped, i.e. oscillations are damped to 50% within 5 seconds. Even for the most severe fault with 230kV line cleared by circuit breaker protection by tripping all the lines connected to 230kV bus, the system remains stable and well damped. The simulation studies are applied to a 24-bus WECC system. The results also demonstrate compliance with the applicable automatic standards connection to the grid with the exception of active power settling time.
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Keywords


Transient Stability Analysis; Renewable Energy Sources; Transmission System

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References


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