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Standard passivity-based control for multi-hydro-turbine governing systems with surge tank.
- Source :
-
Applied Mathematical Modelling . Mar2020, Vol. 79, p1-17. 17p. - Publication Year :
- 2020
-
Abstract
- • An entire dynamic model of a synchronous machine with hydro-turbine systems is shown. • A decentralized controller of a hydro-turbine systems with surge tank based on Euler–Lagrange representation is proposed. • The proposed controller is based on standard passivity-based control. • A comparison of the proposed controller with a standard cascade PID controller and sliding-mode controller is presented. This paper addresses the problem of control design for hydro-turbine governing systems with surge tanks from the perspective of standard passivity-based control. The dynamic model of a synchronous machine is considered in conjunction with a model of the hydro-turbine to generate an eleventh-order nonlinear set of differential equations. An Euler–Lagrange representati of the system and its open-loop dynamics is developed. Then, the standard passivity-based control is applied to design a global and asymptotically stable controller in closed-loop operation. The proposed control is decentralized to avoid challenges of communication between the hydro-turbine governing systems. The proposed standard passivity-based control approach is compared with two control approaches. First, a classical standard cascade proportional-integral-derivative controller is applied for the governing system, the automatic voltage regulator, and the excitation system. Second, a sliding mode control is also implemented in the governing system. Two test systems were used to validate the performance of the proposed controller. The first test system is a single machine connected to an infinite bus, and the second test system is the well-known Western System Coordinating Council's multimachine system. Overall, simulation results show that the proposed controller exhibits a better dynamic response with shorter stabilization times and lower peaks during the transient periods. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0307904X
- Volume :
- 79
- Database :
- Academic Search Index
- Journal :
- Applied Mathematical Modelling
- Publication Type :
- Academic Journal
- Accession number :
- 141117177
- Full Text :
- https://doi.org/10.1016/j.apm.2019.11.010