Perturbation estimation based coordinated adaptive passive control for multimachine power systems



Yang, B, Jiang, L ORCID: 0000-0001-6531-2791, Yao, Wei and Wu, QH
(2015) Perturbation estimation based coordinated adaptive passive control for multimachine power systems. CONTROL ENGINEERING PRACTICE, 44. pp. 172-192.

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Abstract

This paper proposes a perturbation estimation based coordinated adaptive passive control (PECAPC) of generators excitation system and thyristor-controlled series capacitor (TCSC) devices for complex, uncertain and interconnected multimachine power systems. Discussion begins with the PECAPC design, in which the combinatorial effect of system uncertainties, unmodelled dynamics and external disturbances is aggregated into a perturbation term, and estimated online by a perturbation observer (PO). PECAPC aims to achieve a coordinated adaptive control between the excitation controller (EC) and TCSC controller based on the nonlinearly functional estimate of the perturbation. In this control scheme an explicit control Lyapunov function (CLF) and the strict assumption of linearly parametric uncertainties made on system structures can be avoided. A decentralized stabilizing EC for each generator is firstly designed. Then a coordinated TCSC controller is developed to passivize the whole system, which improves system damping through reshaping the distributed energies in power systems. Case studies are carried out on a single machine infinite bus (SMIB) and a three-machine system, respectively. Simulation results show that the PECAPC-based EC and TCSC controller can coordinate each other to improve the power system stability, finally a hardware-in-the-loop (HIL) test is carried out to verify its implementation feasibility.

Item Type: Article
Uncontrolled Keywords: Coordinated adaptive passive control, Perturbation estimation, Energy shaping, Multimachine power systems
Depositing User: Symplectic Admin
Date Deposited: 28 Apr 2016 09:55
Last Modified: 19 Jan 2023 07:37
DOI: 10.1016/j.conengprac.2015.07.012
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3000911