Optimal wide area control of a power system with limited measurements

Naguru, N R and Sarkar, Vaskar (2015) Optimal wide area control of a power system with limited measurements. In: Signal Processing, Informatics, Communication and Energy Systems (SPICES), 2015, 19-21, February 2015, Kozhikode , India.

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The objective of this paper is to design a state feedback controller to damp out the inter-area oscillations in the power system network with limited wide area measurements. The conventional state feedback controller designed through LQR optimization requires all the state variables as input. However, the dynamics of a power system is governed by a large number of state variables. Therefore, it is, practically, not possible to place sensors everywhere for monitoring the complete system state in real-time. In order to address the particular issue, an optimized state feedback controller is proposed, which can be implemented with limited number of state inputs. The structurally constrained H2-norm optimization technique is employed to perform the proposed state feedback controller design. The reference frame requirement for defining the rotor angles of generators under the scenario of limited state observability is also investigated. The performance of the wide area controller with limited state inputs is verified through a case study on the New England 39-bus system under different scenarios of state unobservability.

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Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Inter-area oscillations, reference frame, state observability, structurally constrained H2-norm optimization, wide area control,
Subjects: Others > Electricity
Divisions: Department of Electrical Engineering
Depositing User: Team Library
Date Deposited: 31 Jul 2015 09:52
Last Modified: 21 May 2018 10:18
URI: http://raiith.iith.ac.in/id/eprint/1749
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