As we know, coherent groups of synchronous generators can be identified and converted to an equivalent dynamic model to simplify a given power system and still maintain the dynamics of the system. However, the Type-3 and Type-4 wind farms do not possess much inertia and hence cannot replicate the behaviour of synchronous generators. What approaches can still be made to aggregate the wind farms present in a region and connect it to a single transmission bus, such that the dynamics of the system is still maintained? Any help on this would be much appreciated.
Dear soudipan
Please see this attachment file
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https://www.google.com/url?sa=t&source=web&rct=j&url=http://citeseerx.ist.psu.edu/viewdoc/download%3Fdoi%3D10.1.1.470.6173%26rep%3Drep1%26type%3Dpdf&ved=2ahUKEwjJ8ofk1LPcAhXMKFAKHaCYBk4QFjAAegQIAhAB&usg=AOvVaw1cJGtiNvZidaAS229p1IgR
Modern generators - using any source, wind, solar, fossil - are all themselves increasingly complex and use algorithms and computers to 'optimise' their performance. So I don't think you can aggregate them and 'simplify' the result - if you try to do this your results will be deceptive, and will not closely (or at all) match the behaviour of such systems in the real world. Seek instead to define the transfer functions of each farm and come up with specifications of their control algorithms that ensure that this transfer function is maintained across all likely operating conditions. Best of luck!
@Tony Maine: Thank you for your valuable suggestion. Will you be able to share any resources (journals or conference papers, reports, etc.) where the transfer function approach has been made for studying transient stability problems of wind farms? That would be of great help!
The following publications are highly relevant and dedicated to the electromechanical and other equivalences of power systems. They listed various approaches equivalency for various studies. You will also find older (years 2003-2004) publications at my RG list of publications.
Article Stability-based minimization of load shedding in weakly inte...
Article Reduced-order modelling of solar-PV generators for small-sig...
Book Dynamic Security of Interconnected Electric Power Systems - Volume 1
Book Dynamic Security of Interconnected Electric Power Systems - ...
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