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Indexed by:Journal Papers

Date of Publication:2015-11-30

Journal:NEUROCOMPUTING

Included Journals:SCIE、EI

Volume:168

Page Number:269-275

ISSN No.:0925-2312

Key Words:Load frequency control; Switched delay systems; Guaranteed cost control; Power systems; Large delay periods (LDPs)

Abstract:This paper investigates the problem of guaranteed cost load frequency control (LFC) for a class of uncertain power systems with large delay periods (LDPs). The model of LFC for power systems with LDPs has been firstly modeled as a switched delay system, which includes a potentially unstable subsystem caused by LDPs and a stable subsystem caused by small delay periods (SDPs). Based on the switching technique and under the constraint conditions of the length ratio and the frequency of LPD, the guaranteed cost load frequency controller can be obtained such that the closed-loop system is exponentially stable and a weighted guaranteed cost upper bound is achieved. Finally, an example is provided to demonstrate the applicability of the proposed method. (C) 2015 Elsevier B.V. All rights reserved.