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Title: Robust converter control design under time-delay uncertainty
Authors: Flores, David Rodriguez 
Markovic, Uros 
Aristidou, Petros 
Hug, Gabriela 
Major Field of Science: Engineering and Technology
Field Category: Electrical Engineering - Electronic Engineering - Information Engineering
Keywords: Linear parameter-varying (LPV) system;Low-inertia systems;Time delay;Voltage source converter (VSC);Linear fractional transformation (LFT);H∞ control
Issue Date: 1-Jun-2019
Source: IEEE Milan PowerTech, 23-27 June 2019
Conference: IEEE Milan PowerTech 
Abstract: This paper deals with the converter control design under time delay uncertainty in power systems with high share of converter-based generation. Two approaches for time delay modeling are proposed using linear fractional transformations and linear parameter-varying systems, respectively. Subsequently, two output-feedback synthesis methods are implemented based on H∞ control theory, and formulated using linear matrix inequalities: (i) a norm-bounded parametric H∞ controller; and (ii) a gain-scheduled H∞ control. These robust control principles are then employed to improve the performance of Voltage Source Converters (VSCs) under varying measurement delays. Three novel control strategies are proposed in order to redesign the conventional inner control loop and improve converter performance when dealing with measurement uncertainty. Finally, the controllers are integrated into a state-of-the-art VSC model and compared using time-domain simulations.
ISBN: 9781538647226
DOI: 10.1109/PTC.2019.8810516
Rights: © IEEE
Type: Conference Papers
Affiliation : ETH Zurich 
Leeds University 
Appears in Collections:Δημοσιεύσεις σε συνέδρια /Conference papers or poster or presentation

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