OICC Press Signal Processing and Renewable Energy (SPRE) 2588-7335 4 1 2020 03 01 PV Inverters and Modulation Strategies: A Review and A Proposed Control Strategy for Frequency and Voltage Regulation 1 21 EN Shayan Ebrahimi Department of Electrical Engineering, Islamic Azad University, South Tehran Branch, Tehran, Iran Ali Moghassemi Department of Electrical Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran Javad Olamaei Islamic Azad University, South Tehran Branch Journal Article 2020 03 01 To ensure the reliable delivery of AC power to consumers from renewable energy sources, the photovoltaic inverter has to ensure that the frequency and magnitude of the generated AC voltage are within acceptable limits. This paper develops models and control strategies for the DC-AC converter to ensure that the sinusoidal waveform of the desired frequency voltage and magnitude generated for both single-phase and three-phase operation depend on the robustness of the inverter control system. The paper reviews various topologies and modulation approaches for photovoltaic inverters in both single-phase and three-phase operational modes. Finally, a proposed control strategy is presented to ensure frequency and voltage regulation.