A linear quadratic tracking based voltage controller for VSI; MVDC shipboard power system application

Babaei, Maziar; Qunais, Thaer; Abdelwahed, Sherif

doi:10.1109/pesgm.2017.8274523

Cited by 6 publications

(2 citation statements)

References 15 publications

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“…Optimal controllers for microgrids are aimed to achieve the best performance and/or stability margins by applying numerical optimization methods to the open-loop model. Some relevant works related to the optimal control applied to Voltage-Current (V-I) control level may be found in [3][4][5][6][7][8][9][10][11][12]. Most of these works use proportional-integral (PI) or proportional-resonant (PR) controllers with linear quadratic (LQ) control to compute an optimal state-feedback matrix that minimizes certain cost functions.…”

Section: Introductionmentioning

confidence: 99%

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A State-Space Model of an Inverter-Based Microgrid for Multivariable Feedback Control Analysis and Design

2020

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In this work, a synchronous model for grid-connected and islanded microgrids is presented. The grid-connected model is based on the premise that the reference frame is synchronized with the AC bus. The quadrature component of the AC bus voltage can be cancelled, which allows to express output power as a linear equation for nominal values in the AC bus amplitude voltage. The model for the islanded microgrid is developed by integrating all the inverter dynamics using a state-space model for the load currents. This model is presented in a comprehensive way such that it could be scalable to any number of inverter-based generators using inductor–capacitor–inductor (LCL) output filters. The use of these models allows designers to assess microgrid stability and robustness using modern control methods such as eigenvalue analysis and singular value diagrams. Both models were tested and validated in an experimental setup to demonstrate their accuracy in describing microgrid dynamics. In addition, three scenarios are presented: non-controlled model, Linear-Quadratic Integrator (LQI) power control, and Power-Voltage (PQ/Vdq) droop–boost controller. Experimental results demonstrate the effectiveness of the control strategies and the accuracy of the models to describe microgrid dynamics.

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Section: Introductionmentioning

confidence: 99%

“…In this work, a state-space representation of the entire linearized microgrid was developed in the dq frame. The entire system is described in (11):…”

Section: Introductionmentioning

confidence: 99%