Performance comparison of different power modules applied in photovoltaic inverters during harmonic current compensation

The increasing of PV systems connected to distribution system affect significantly the grid power stability. Some works propose to use the PV inverter excess capacity to support harmonic compensation. The main drawback of this solution is the increase of losses in the converter during the execution of this task. Therefore, this paper analyzes the power losses in the PV inverter components (semiconductor switches and diodes) during the harmonic compensation process. Simulations considering a 5kW three-phase PV inverter are performed with focus on conduction and switching losses.