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

Abstract

This paper presents a stand-alone Wind/PV hybrid power system supplying a threephase induction motor for pumping applications. The nonlinear dynamical mathematical model for the system components is presented and used for numerical simulations. The system comprises a fixed speed wind turbine driving a self-excited induction generator (SEIG) terminated by capacitor bank, and a photovoltaic (PV) array integrated via DC-DC converter, inverter and LC filter. The two sources feed (IM) driving a centrifugal pump. The duty ratio of the converter is controlled to maintain constant voltage at common coupling point. System performance is tested by changing the load torque coupled to the motor at certain solar irradiance levels and with fixing load torque with successive step changes of the solar irradiance levels. It is concluded that the system has the ability to run at wide range of solar intensity levels and motor loading conditions. Numerical simulations are executed using MATLAB software.

An effective standalone hybrid wind‐ photovoltaic water pumping system with reduced power converter count

“…Þ is varied accordingly to ensure maximum power extraction from the solar PV array while maintaining the v dc constant. Conclusively from (24), the D for varying G remains effectively constant as disturbances caused by changes in G are rejected by adjusting R L F ð Þ.…”

“…To overcome these drawbacks, few studies have proposed power processing of AC motor-based WPS using reduced converter count. [24][25][26] However, in such systems, mainly the MPPT of the WECS is compromised.…”

“…Such systems require more power devices resulting in increased losses and system cost. To overcome these drawbacks, few studies have proposed power processing of AC motor‐based WPS using reduced converter count 24‐26 . However, in such systems, mainly the MPPT of the WECS is compromised.…”

Operational performance of a PV generator feeding DC shunt and induction motors with MPPT

“…So many researchers have focused recently on this lively concern. Additionally, the environmental considerations and many other related issues have boosted the attention and the awareness for the use of renewable energy resources for example wind, solar, fuel cells, water power and many others as measures for this anticipated critical crisis and deficiency in many countries [1]. Furthermore, the overall objective of renewable energy systems is to obtain electricity that is cost competitive and even advantageous with respect to other energy sources [2].…”