Optimizing energy transmission quality from photovoltaic panels feeding a pump to the grid

In order to benefit from renewable energy and harness it to produce electrical energy to operate pumping engines, as well as to support the national grid when there is a surplus. This research studied and simulated a grid-connected solar system that supplies a pump driven by a permanent magnet synchronous motor. In the proposed scheme, the PV panels are connected via the boost converter to adjust the electrical power that is used to feed the pump, the DC voltage at the DC-link is converted to an alternating voltage through the inverter driven by the pump. The scheme also includes a bidirectional three-phase converter connected to the DC-link, which works to transfer the electrical energy from and to the grid. Increasing the quality of power transfer to and from the network and increasing the efficiency of the power produced from solar panels are significant issues. As a result, in this study, we used sliding mode technology to enhance the system’s functionality. The findings demonstrated that the sliding-mode control technology performed exceptionally well in terms of enhancing energy extraction efficiency, tracking the solar panel’s maximum power point where the efficiency of the MPPT controller reached 97.7%, and improving the precision of active and reactive power control. It also improved the quality of power transmission by lowering the total harmonic distortion coefficient in ratios between 22 and 25%, all the while preserving precise and efficient control over the dc-link voltage in spite of variations in pump torque or solar radiation.