Review of Control Techniques in Microinverters

Area of Science:

• Renewable Energy Systems
• Electrical Engineering
• Power Electronics

Background:

• Growing demand for electricity and reduced fossil fuel reliance drive interest in renewable energy sources.
• Photovoltaic (PV) panel electricity generation is increasingly important due to falling costs and technological advancements.
• Microinverters offer high efficiency in Maximum Power Point Tracking (MPPT) and flexibility for PV systems, mitigating issues like partial shading.

Purpose of the Study:

• To review and compare various control strategies employed in microinverters for diverse applications.
• To analyze control strategies based on stability, dynamic response, topologies, and control objectives.
• To identify research gaps concerning the stability and robustness of microinverter control strategies.

Main Methods:

• Comprehensive literature review of microinverter control strategies.
• Comparative analysis of different control approaches considering key performance metrics.
• Evaluation of existing research on stability and robustness in microinverter control.

Main Results:

• Microinverters present a promising solution for enhancing PV system efficiency and reliability.
• Various control strategies exist, each with distinct advantages and disadvantages regarding stability, dynamics, and topology.
• A significant gap exists in research concerning the stability and robustness analysis of current microinverter control strategies.

Conclusions:

• Effective control strategy design is crucial for improving microinverter reliability and conversion efficiency.
• Further investigation into the stability and robustness of microinverter control is essential for advancing PV technology.
• Addressing these research gaps will facilitate the wider adoption and improved performance of microinverter-based PV systems.