Standard passivity-based control for multi-hydro-turbine governing systems with surge tank

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. © 2019 Elsevier Inc.

• Fecha de publicación: 2020
• Institución: Universidad Tecnológica de Bolívar
• Repositorio: Repositorio Institucional UTB
• Idioma: eng
• OAI Identifier: oai:repositorio.utb.edu.co:20.500.12585/8961
• Acceso en línea: https://hdl.handle.net/20.500.12585/8961
• Palabra clave: Decentralized control approach; Euler–Lagrange representation; Hydro turbine governing systems; Lyapunov's stability; Standard passivity-based control; Control system analysis; Decentralized control; Differential equations; Hydraulic turbines; Lagrange multipliers; Nonlinear equations; Proportional control systems; Scheduling algorithms; Sliding mode control; Surge tanks; Two term control systems; Voltage regulators; Asymptotically stable; Automatic voltage regulators; Closed-loop operation; Hydro turbine governing systems; Lagrange; Lyapunov's stability; Passivity based control; Proportional integral derivative controllers; Controllers
• Rights: restrictedAccess
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/