Mitigating Oscillations in Hydraulic Pumping Systems by Using a Supplementary Damping Controller
- PDF / 1,089,067 Bytes
- 11 Pages / 595.276 x 790.866 pts Page_size
- 44 Downloads / 220 Views
Mitigating Oscillations in Hydraulic Pumping Systems by Using a Supplementary Damping Controller Erick Melo Rocha1 · Walter Barra Junior1 · Hugo Menezes Barra1 · Kevin Eduardo Lucas Marcillo2,3 · Fabricio Gonzalez Nogueira4 Received: 20 January 2019 / Revised: 24 April 2019 / Accepted: 30 May 2019 © Brazilian Society for Automatics–SBA 2019
Abstract A feedback control strategy for mitigating pressure oscillations in centrifugal pumping systems is proposed herein. Severe system damage may occur if such oscillations are not adequately damped. According to the experimental data observed, this dominant oscillating mode is operating point-dependent and may become poorly damped under low-speed regime. By using a theoretical control approach, the key parameters that affect the damping of the dominant oscillating mode are investigated. Linear model analysis show that the relative damping of the oscillations depends on the pumping system’s average rotational speed and it is almost zero at low-speed operating condition. To cope with such a dangerous condition, a supplementary feedback damping controller is designed. The damping controller actuates via motor–pump variable-speed drive subsystem. The proposed controller modulates the rotational speed setpoint of the centrifugal pump rotor to produce an extra damping torque. Controller design is performed by using frequency domain techniques, and performance thereof is assessed through experimental tests in a laboratory rig pumping system. The results obtained show that by using the proposed control methodology, it is possible to safely operate the pumping at a low-speed regime, thus preventing damage to the equipment. Keywords Damping control · Oscillation mode mitigation · Hydraulic pumping system
1 Introduction
B
Erick Melo Rocha [email protected] Walter Barra Junior [email protected] Hugo Menezes Barra [email protected] Kevin Eduardo Lucas Marcillo [email protected] Fabricio Gonzalez Nogueira [email protected]
1
Universidade Federal do Pará, 01 Augusto Corrêa St., Belém, PA 66075-110, Brazil
2
Facultad de Ingeniería Eléctrica y Computación, Escuela Superior Politécnica del Litoral, ESPOL, Campus Gustavo Galindo, 09-01-5863 Guayaquil, Ecuador
3
Department of Automation and Systems, Federal University of Santa Catarina, UFSC, Florianópolis 88040-900, Brazil
4
Universidade Federal do Ceará, 2853, Universidade Av., Fortaleza, CE 60020-181, Brazil
Hydraulic pumping systems play an important role in many industrial applications requiring transport and distribution of fluids. Such applications include chemical processes (Smith and Corripio 1997), fresh water pumping (Ghosh et al. 2015), and auxiliary hydraulics systems for hydroelectric power plant operation (Cabrera et al. 1996), to name a few. Photovoltaic (Chandel et al. 2015), and mining (Deepak et al. 2007), pumping systems are examples of the pumping systems that need to be operated in variable-speed regime. In the former case, variable-speed operation is required due to variable sun irradiance on pu
Data Loading...
