Impact of Polyphase Induction Motor on Photovoltaic Water Pumping System

Abstract

An improved dynamic behavior of water pumping system is presented in this paper. The system consists of a seven-phase induction motor powered by a photovoltaic generator (PVG) and a battery bank, via two static converters controlled independently. A boost converter based on fuzzy logic controller is utilized to adapt the voltage of the photovoltaic generator in order to extract maximum power. A three levels neutral point clamped inverter (NPC) is introduced to attain a low voltage harmonic distortion in the system. In addition, an improved direct field oriented control with minimizing non-sequential currents for the seven-phase induction motor using fuzzy logic filter is implemented. To verify and validate the proposed system, an optimal operating point is chosen to locate the dynamic and static operating limits of the system. Moreover, the proposed system is simulated and analyzed. The minimization of the non-sequential currents component induces a quality energy improvement with minimizing of the Joule losses, which increase the system efficiency. The use of the seven-phase machine brings a degree of additional freedom to the system, its tolerance to faults is a capital issue for the isolated places.

Optimal Configuration Investigation for Photovoltaic Water Pumping System, Case Study: In a Desert Environment at Ghardaia, Algeria

“…Research and current status of various aspects of SPVWPS have been carried out by review papers [12][13][14][15]. Due to the great importance of the motor in the PV pumping chain to generate the appropriate electromechanical power conversion [16], recently, regarding the suitable type of engine, a large number of studies have been conducted such as brushless DC motor (BLDC) [17,18], permanent magnet (PM) motor [19][20][21], switched reluctance motor (SRM) [22] and the induction motor (IM) [23]. However, due to its significant characteristics such as high efficiency, high power density, quick acceleration capability and strong starting torque at low input power [24,25], the brushless permanent magnet motor is considered an appropriate matching for stand-alone PV pumping systems.…”

Implementation of the Three-Phase Inverter of Medium Power for Applications in Photovoltaic Pumping Systems Avoiding Oversizing

“…• Increased pumping capacity • Lower maintenance cost • A higher range of commercial models However, in the photovoltaic systems of alternating current pumping, an important component is added, the inverter, this one when operating with motors must be able to withstand the starting current of these, which becomes up to six times the nominal current. That is why most sizing and installation manuals propose to oversize the system, which represents a problem concerning the cost of the system [7][8][9][10]. Another drawback related to inverters is that the most commercially available ones range from 500 W to 2 kW, which makes it impossible to use pumps with high-power AC motors and, therefore, generate an intermediate flow rate that is insufficient for most agricultural applications [11][12][13][14][15][16].…”