CUED Publications database

Frequency and voltage control of hybrid AC/DC networks

Watson, JD and Lestas, I (2019) Frequency and voltage control of hybrid AC/DC networks. In: IEEE Conference on Decision and Control, 2018-12-17 to 2018-12-19 pp. 3445-3450..

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Hybrid AC/DC networks are a key technology for future electrical power systems, due to the increasing number of converter-based loads and distributed energy resources. In this paper, we consider the design of control schemes for hybrid AC/DC networks, focusing especially on the control of the interlinking converters (ILC(s)). We present two control schemes: firstly a decentralized algorithm for primary control, and secondly, a distributed controller for secondary control. In the primary case, the stability of the controlled system is proven in a general hybrid AC/DC network which may include asynchronous AC subsystems. It is shown that power-sharing across the AC/DC network is significantly improved compared to previously proposed dual droop control. The distributed secondary control scheme guarantees the convergence of the AC system frequencies and the average DC voltage of each DC subsystem to their nominal values respectively. A prescribed power-sharing is also achieved. The proposed algorithms are verified by simulation on a test hybrid AC/DC network in MATLAB / Simulink.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Uncontrolled Keywords: math.OC math.OC cs.SY
Divisions: Div F > Control
Depositing User: Unnamed user with email
Date Deposited: 06 Nov 2018 01:51
Last Modified: 09 Sep 2021 03:14
DOI: 10.1109/CDC.2018.8619412