Energy-Efficient Autonomous Solar Water-Pumping System for Permanent-Magnet Synchronous Motors

Abstract

(2017) Energy-efficient autonomous solar water-pumping system for permanent-magnet synchronous motors. IEEE Transactions on Industrial Electronics, 64 (1). pp. 43-51. ISSN 1557-9948Access from the University of Nottingham repository: http://eprints.nottingham.ac.uk/40003/1/Energy-efficient%20autonomous%20solar%20water-pumping%20system%20for%20permanent-magnet%20synchronous%20motors.pdf Copyright and reuse:The Nottingham ePrints service makes this work by researchers of the University of Nottingham available open access under the following conditions. This article is made available under the University of Nottingham End User licence and may be reused according to the conditions of the licence. For more details see: http://eprints.nottingham.ac.uk/end_user_agreement.pdf A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription.For more information, please contact eprints@nottingham.ac.uk 1 Energy-efficient autonomous solar water-pumping system for permanent magnet synchronous motors Riccardo Antonello, Member, IEEE, Matteo Carraro, Alessandro Costabeber, Member, IEEE, Fabio Tinazzi, and Mauro Zigliotto, Member, IEEEAbstract-This paper presents a novel stand-alone solarpowered water pumping system, especially suited for usage in rural or remote areas. The system is primarily designed to reduce both cost and complexity, while simultaneously guaranteeing optimal utilisation of the photovoltaic generator. The use of standard hardware and control architectures ensures ease of installation, service and maintenance. The proposed solution consists of a water pump driven by a permanent magnet synchronous motor (PMSM), controlled by a conventional field oriented control scheme. The photovoltaic array is directly connected to the DC bus of the inverter, with no intermediate power conversion stages. A perturbation based extremum-seeking controller adjusts the motor speed reference to attain the maximum power point operation of the photovoltaic array. Both simulations and experimental results on a full-scale prototype support the effectiveness of the proposed system. Index Terms-PMSM drives, MPPT tracking, PV water pumping, extremum seeking control NOMENCLATURE Variables names convention (letter / subscript):• uppercase / uppercase: large-signal DC quantity.• lowercase / lowercase: small-signal quantity.• uppercase / lowercase: amplitude of a small-signal sinusoidal perturbation.• lowercase / uppercase: total quantities (i.e. small-signal perturbation superimposed on large-signal DC quantity) Symbols used: p P , u P PV array output power and voltage. p C , p I power stored in DC bus capacitor, power absorbed by the inverter. p R , p M Joule losses and delivered mechanical power. u D,Q , i D,Q PMSM voltages and currents in the dq frame.

Development of a Behavior Maps Tool to Evaluate Drive Operational Boundaries and Optimization Assessment of PMa-SynRMs

“…Since electromagnetic and thermal domains are strongly linked, they are often solved together, and afterwards, the other domains are evaluated [10]. Behavior maps, which are a multi-dimensional representation of datasets including different motor variables, are well suited for design assessment in motors [11], since they allow calculating the energy consumption of a specific driving cycle [12,13]. Efficiency maps are commonly obtained through finite elements analysis (FEA) or experimental analysis [14], whereas power losses are evaluated following specific control strategies such as the MTPA (maximum torque per ampere), MTPV (maximum torque per voltage) [15], or ME (maximum efficiency) trajectories [16].…”

“…These equations can be expressed in the dq current plane. By replacing (10) and (11) into (24) and replacing the dq torque generating currents iod and ioq by (17) and 18…”

Optimal Control of Induction Motor for Photovoltaic Water Pumping System

“…Various types of electric motors are used in PV water pumping system, each has its pro and cons, among them, DC motor [3], permanent magnet synchronous (PMSM) [4,5], brushless DC motor [6] and induction motor (IM) [7,8]. Recently, the PV water pumping systems driven by IM are frequently used because these engines provide several advantages such as simple control thanks to the evolution of power electronics, low cost and free-maintenance [9,10].…”

Development of grid‐connected solar water pumping system utilizing diode bridge

“…11,12 Stand-alone SWPS are available in two configuration, ie, single-stage and two-stage. [13][14][15] In single-stage system, the DC voltage developed by solar photovoltaic (SPV) source is directly converted to AC voltage using voltage source inverter (VSI) and supplied to the motor. Whereas, in two-stage system, SPV voltage is first raised to higher level using DC-DC converter and then converted to AC voltage.…”