Renewable energy and voltage source inverter-driven microgrids generally lack natural inertia to provide transient energy support during sudden load demands. Thus, the virtual synchronous generator (VSG) is a state-of-the-art control technique applied for power controllers to emulate virtual inertia during sudden load changes. This allows stable power delivery from the source to the loads during sudden active power load demands. However, in the case of large inductively dominant load demands, the VSG-based power controller's power delivery capability is relatively poor. To address this limitation of VSG control, this paper proposes an advanced control scheme in which VSG is supported by appropriately designed voltage and current controllers. Conventionally, classical tuning techniques were used to design the controllers in the forward paths of the voltage and current controllers (CVA). Accordingly, the conventional control scheme is a combination of VSG and CVA. Recently, the hybrid-modified-pole-zero-cancellation technique has been discussed in the literature for the design of voltage and current controllers (HVA) to improve the vector control of the inverter. This method supports better tuning for controllers of both forward and cross-coupling paths. Thus, to improve the power delivery with VSG-based control when subjected to inductive load changes, this paper proposes an advanced control scheme that is based on the combination of VSG and HVA. The performance of both conventional and proposed control schemes is verified through simulation in MATLAB/Simulink under two different test load conditions, namely good and poor power factor loadings. Based on the results obtained during these test cases, the response and power delivery capability of the proposed control scheme is compared with that of the conventional control scheme. From the results, it is verified that the power delivery capability of the microgrid with the proposed control scheme is improved by 25% than the conventional control scheme.
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Advanced Virtual Synchronous Generator Control Scheme for Improved Power Delivery in Renewable Energy Microgrids
Published:
03 December 2024
by MDPI
in The 5th International Electronic Conference on Applied Sciences
session Energy, Environmental and Earth Science
Abstract:
Keywords: Power delivery; Microgrids; Transient response; Virtual inertia; Virtual synchronous generator; Voltage and current controllers.
Comments on this paper
HimaJyothi Kasaraneni
3 December 2024
innovative research on Advanced Virtual Synchronous Generator Control Scheme
DIMMITI RAO
3 December 2024
innoveative research work
Yamini Kodali
4 December 2024
Nice work.