A Global Stability of Linearizing Control of Induction Motor for PV Water Pumping Application

Abstract

This article describes how a field oriented control can provide the same performance as it is achieved by a DC motor. However, this technique requires a mechanic sensor and is very sensitive to the variation of motor parameters which results in an undesirable coupling between the flux and the torque. To solve these problems, this paper proposes a global stability and robust nonlinear controller, applied to induction motor (IM), in order to achieve an exact decoupling between speed and flux for all motor operating conditions. The induction motor is coupled with a centrifugal hydraulic pump, powered by a photovoltaic array speeding system. The proposed system is designed for usage in rural areas or remote electricity needs in absence of the grid network. A nonlinear controller adjusts the motor speed reference to attain the maximum power point (MPPT). In presence of rotor and stator resistances and irradiation disturbance the results obtained by simulations confirm the effectiveness of the proposed method.

Fuzzy logic control of hybrid systems including renewable energy in microgrids

“…Sun irradiances, solar cellule temperature and the zone of implementation are the factors, which affect the production of electric energy extracted from PV panels [28]. Different techniques of the modeling procedure have been shown before; in our study, we consider the schema of a single diode model for the simulation of PV [29]. The model is illustrated in Figure 5.…”

Standalone photovoltaic array fed induction motor driven water pumping system

“…The photovoltaic module has non-linear characteristics (V&I) and depends on the solar radiation and the temperature of the cells [21]. Equation 1…”

“…The important part of photovoltaic water pumping systems is the hydraulic pump [21]. and the most commonly used type of pumping technology is the centrifugal pump, because it simple worked, flexible modular1, relatively high efficiency and capable of pumping a high volume of water [18,20].…”

“…The centrifugal pump is mechanically coupled to the induction motor, where it presents the mechanical load of this IM motor [21]. The mechanical equation of the system is given by the following expression [22]:…”

“…The P&O technique is one of the simplest and most popular techniques of MPPT. It requires few mathematical calculations that make the implementation of this algorithm quite simple [21]. The paramount idea of this method is to push the system to operate in the direction where the output power supplied from the PV system boost up [22].…”