Operational characteristics of hybrid‐powered three‐phase induction motor via synchronous and photovoltaic generators with MPPT utilised by synchronous generator automatic voltage regulator

Abstract

The operational characteristics of a stand-alone hybrid-powered system are investigated. The sources are conventionally powered synchronous generator and photovoltaic (PV) array. The voltage of the common coupling point is controlled by the automatic voltage regulator of the synchronous generator via which the maximum power point (MPP) of the PV generator is tracked using the open-circuit voltage method. Numerical simulations based on the non-linear dynamical model in dq stationary reference frame are conducted. Power control unit is incorporated to control the driving torque of the synchronous generator once the PV generator becomes unable to meet the requirements of the motor because of reduction of the solar irradiance and/or increase of the load. The analysis includes the response of the system after step changes in the load coupled to the motor and after step changes in the levels of the solar irradiance. The steady-state characteristics of the induction motor in case of hybridisation at various solar intensities are presented and compared with the case when the motor is powered by fixed terminal voltage. It is concluded that the proposed system can run at wide range of operating conditions and robust enough to withstand system parameters step changes.

Modelling, simulations and operational performance of a stand-alone hybrid wind/PV energy system supplying induction motor for pumping applications

“…As can be noted from Figure 1, the output voltage as function of the current of the PV generator is highly nonlinear. It has been approximated using a 10th order polynomial function as (Widyan, 2015a(Widyan, , 2015bWidyan, 2014;Sweidan, 2017;Sweidan and Widyan, 2017):…”

“…It is concluded that the system is reliable and can tolerate different disturbances as it can settle down to the normal operating points. The operational characteristics of a hybrid powered three-phase induction motor by PV and synchronous generator is carried out (Widyan, 2015b). The voltage of a common coupling point is controlled by the AVR of synchronous generator which is used to change its magnitude in accordance with the MPP of photovoltaic (PV) generator at all convenient intensity levels.…”

Development of low‐cost PV array‐fed SRM drive‐based water pumping system utilising CSC converter

“…Therefore, the proper control of PV panel is necessary to optimise its output power, and hence the use of maximum power point tracking (MPPT) controller with PV system is essential to make it as a stable electrical energy source and to provide maximum output power at all irradiance levels and environmental conditions. The large number of maximum power tracking techniques have been utilised in different solar PV energy-based applications [1][2][3][4][5]. The proposed water pumping system utilises perturbation and observe (P&O) algorithm for PV power optimisation, because of its less implementation complexity and independency from the PV array parameters [4,5].…”

Geometric maximum power point tracking and sliding mode control of a bidirectional grid connected single phase two‐stage photovoltaic system with DC loads

“…According to the nonlinear characteristics of the PV array [1], various MPPT methods have been designed. Among them, there are several widely applied MPPT methods, such as the perturb and observe (P&O) methods [2–9], incremental conductance (INC) methods [10–14], ripple correlation control (RCC) methods [15–17], and open or short circuit methods [18–20]. The basic idea of P&O method is to move the panel power to the maximum power point (MPP) by continuously perturbing and observing the panel operation point.…”