Three-Phase Photovoltaic System with RL Load Current Sensorless Reactive Power Compensation Technique

A grid-connected Photovoltaic (PV) systems can be used with an RL load on the grid side. The reactive current flows from the grid to the RL load because the PV system lacks an output for the current. The grid voltage and current phases do not match when the reactive current is output from the grid to the load. The full-bridge inverter of the PV system can compensate for the reactive current flowing into the RL load. A current sensor should be added to the system to detect the RL load current when compensating for the reactive current. Additionally, the calculation time of the system increases owing to the additional current detection. This study proposes a method to compensate for the reactive current without using an RL load current sensor. A power SIM simulation is performed to verify the proposed technique. The conventional and proposed methods are compared using the same hardware as the simulation.