title: Small-signal modelling and control of photovoltaic based water pumping system.
abstract: This paper studies small-signal modelling and control design for a photovoltaic (PV) based water pumping system without energy storage. First, the small-signal model is obtained and then, using this model, two proportional-integral (PI) controllers, where one controller is used to control the dc-link voltage and the other one to control the speed of induction motor, are designed to meet control goals such as settling time and peak overshoot of the closed loop responses. The loop robustness of the design is also studied. For a given set of system parameters, simulations are carried out to validate the modelling and the control design.
authors.affiliation: Department of Electrical Engineering, Indian Institute of Technology, Kharagpur, West Bengal 721302, India. Electronic address: arunghosh1@gmail.com.
authors.forename: Arun
authors.initials: A
authors.lastname: Ghosh
authors.affiliation: School of Electrical Sciences, Indian Institute of Technology, Bhubaneswar, Odisha 751013, India. Electronic address: sgm10@iitbbs.ac.in.
authors.forename: Siva
authors.initials: S
authors.lastname: Ganesh Malla
authors.affiliation: School of Electrical Sciences, Indian Institute of Technology, Bhubaneswar, Odisha 751013, India. Electronic address: cnb@iitbbs.ac.in.
authors.forename: Chandrasekhar
authors.initials: C
authors.lastname: Narayan Bhende
keywords: PI controller design; PV based water pumping system; Small-signal modelling