Pre‑connection studies required by network service providers and proponents have evolved rapidly in response to accelerating connection requests for utility scale renewable energy (RE) generators. Such studies are important to ensure the ongoing secure and stable operation of the power system. Many of the study requirements have been inherited from the original specifications for synchronous generators, with additional requirements added based on developing experiences and knowledge related to the integration of asynchronous generation.
Industry and academic experiences have since identified considerable concerns relating to the accuracy, time, and expertise required to conduct some of the studies for the connection of large RE generators. Difficulties are commonly related to EMT studies, investigating interactions between asynchronous devices and transient network events. Other difficulties surrounding accuracy and level of data input requirements are commonly related to power quality investigations: most often steady-state harmonic studies. This presentation reviews the studies required to be completed throughout the RE generator connection process, practical implementations, and useful outputs, with a focus on identified shortfalls and where possible, solutions that have been determined.
Associate Research Fellow, Australian Power Quality & Reliability Centre, University of Wollongong
Jason David is a research fellow at the University of Wollongong with the Australian Power Quality & Reliability Centre. His research focusses on the integration of large renewable energy generators and their impact on power quality, most notably, harmonic distortion. Jason also undertakes commercial research projects assisting proponents and network service providers to determine pre-connection compliance assessment.
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