Control and energy management of a pumping system fed by hybrid photovoltaic-wind sources with hydraulic storage : static and dynamic analysis - “uf” and “f.o.c” controls methods comparisons

Abstract EN

In this paper the authors studied and designed a pumping system fed by a re renewable energy (wind and photovoltaic: hybrid system) without battery storage replaced by hydraulic storage.

Both sources are coupled to a DC link in which to optimize the energy transfer a maximum power point tracking MPPT for a variable speed wind turbine and solar photovoltaic are achieved.

Because of the non-classical aspect of the system we have investigated a steady state operation to set the energy management method.

The developed strategy is to use an inverter to control the DC link voltage and the control of the induction machine coupled to the centrifugal pump.

For the dynamic study two control methods are used, the FOC (Field Oriented Control) method and the ‘U / f’ law, an external loop for the DC bus control is added.

An energetic study with a variable meteorological condition shows an interest performance and the efficacy of the implanted control.

A comparative study with the two laws show the approach deduced in the static study.