An optimized LQG servo controller design using LQI tracker for VSP-based AC/DC interconnected systems
| Autor: | Elyas Rakhshani, Hasan Mehrjerdi, Kaikai Pan, Iman Mohammad Hosseini Naveh |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
State variable
Computer science 020209 energy Virtual inertia emulation 020208 electrical & electronic engineering Servo control Linear Quadratic Gaussian Energy Engineering and Power Technology 02 engineering and technology Kalman filter Linear-quadratic-Gaussian control Power (physics) Virtual Synchronous Power Noise Control theory Integrator AC/HVDC system 0202 electrical engineering electronic engineering information engineering Electrical and Electronic Engineering |
| Zdroj: | International Journal of Electrical Power & Energy Systems, 129 |
| ISSN: | 0142-0615 |
| Popis: | This 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) Scopus 2-s2.0-85100401090 |
| Databáze: | OpenAIRE |
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