Robust load frequency control of nonlinear power networks. Issue 2 (1st February 2020)

• Record Type: Journal Article
• Authors: Trip, Sebastian; Cucuzzella, Michele; De Persis, Claudio; Ferrara, Antonella; Scherpen, Jacquelien M. A.
• Is Part Of: International journal of control. Volume 93:Issue 2(2020)
• Page Start: 346
• Page End: 359
• Publication Date: 2020-02-01
• Subjects: Sliding mode control -- decentralised control -- stability of nonlinear systems -- power systems stability; Automatic control -- Periodicals; Electronic journals; 629.8
• DOI: 10.1080/00207179.2018.1557338
• Languages: English
• ISSNs: 0020-7179

Abstract

ABSTRACT: This paper proposes a decentralised second-order sliding mode (SOSM) control strategy for load frequency control (LFC) in power networks, regulating the frequency and maintaining the net inter-area power flows at their scheduled values. The considered power network is partitioned into control areas, where each area is modelled by an equivalent generator including second-order turbine-governor dynamics, and where the areas are nonlinearly coupled through the power flows. Asymptotic convergence to the desired state is established by constraining the state of the power network on a suitably designed sliding manifold. This manifold is designed relying on stability considerations made on the basis of an incremental energy (storage) function. Simulation results confirm the effectiveness of the proposed control approach.