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AuthorRakhshani, Elyas
AuthorNaveh, Iman Mohammad Hosseini
AuthorMehrjerdi, Hasan
AuthorPan, Kaikai
Available date2022-11-14T10:49:08Z
Publication Date2021
Publication NameInternational Journal of Electrical Power and Energy Systems
ResourceScopus
Resource2-s2.0-85100401090
URIhttp://dx.doi.org/10.1016/j.ijepes.2020.106752
URIhttp://hdl.handle.net/10576/36315
AbstractThis paper proposes a novel application for the optimal Linear Quadratic Gaussian (LQG) servo controller to enable a proper coordination of the AC/HVDC interconnected system with Virtual Synchronous Power (VSP) based inertia emulation. Particularly, the proposed control design takes the process disturbances and measurement noise of the studied VSP-HVDC system into account, while few studies have focused on this perspective. The proposed LQG controller with modifications is designed by means of a combination of Kalman Filter (state estimator) and an added Linear Quadratic Integrator (LQI) to observe the system model's states and track the reference commands while rejecting the effects of system noise. Besides, we utilize a swarm-based optimization algorithm to operate as the search process for the tuning of the elements in the weighting matrices involved in the controller design. The role of the proposed optimal LQG controller is to stabilize such AC/DC interconnected system with VSP-based inertia emulator while minimizing the associated performance index. According to the obtained simulation results, in addition to the advancement from the VSP-based approach for damping frequency oscillations excited by faults, application of the proposed LQG servo controller can achieve the targets on both estimating the state variables and tracking the reference signals with satisfactory performance, comparing with the conventional LQG regulator. 2021 The Author(s)
Languageen
PublisherElsevier
SubjectAC/HVDC system
Linear Quadratic Gaussian
Virtual inertia emulation
Virtual Synchronous Power
TitleAn optimized LQG servo controller design using LQI tracker for VSP-based AC/DC interconnected systems
TypeArticle
Volume Number129
dc.accessType Open Access


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