Coordinated frequency control through MTDC transmission systems
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Date
2015-10
Publication Type
Conference Paper
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yes
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Abstract
In this paper we propose a distributed dynamic controller for sharing frequency control reserves of asynchronous AC systems connected through a multi-terminal HVDC (MTDC) grid. We derive sufficient stability conditions, which guarantee that the frequencies of the AC systems converge to the nominal frequency. Simultaneously, the global quadratic cost of power generation is minimized, resulting in an optimal distribution of generation control reserves. The proposed controller also regulates the voltages of the MTDC grid, asymptotically minimizing a quadratic cost function of the deviations from the nominal voltages. The proposed controller is tested on a high-order dynamic model of a power system consisting of asynchronous AC grids, modelled as IEEE 14 bus networks, connected through a six-terminal HVDC grid. The performance of the controller is successfully evaluated through simulation.
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Publication status
published
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Book title
5th IFAC Workshop on Distributed Estimation and Control in Networked Systems, NecSys 2015. Proceedings
Journal / series
Volume
48 (22)
Pages / Article No.
106 - 111
Publisher
Elsevier
Event
5th IFAC Workshop on Distributed Estimation and Control in Networked Systems (NecSys 2015)