Flexible photovoltaic micro inverter

Are microinverters used in photovoltaic (PV) applications?

This paper presents an overview of microinverters used in photovoltaic (PV) applications. Conventional PV string inverters cannot effectively track the optimum

How efficient is a multi-function PV micro-inverter?

A prototype at a power range of 150–300 W is constructed. The efficiency of 95.3% with a unity power factor and a low input current THD is achieved at full load. In , a novel multi-function PV micro-inverter with three stages is proposed. The first stage is a double parallel boost converter, which performs MPPT and increases the input voltage.

What is a micro-inverter?

It should be noted that in inverter technologies, there has been an increasing interest to achieve robust output power injection capabilities with lesser design complexity in terms of controller part and power circuit topology. Micro-inverters (MIs) are module based type of inverters that have aroused much interest in recent years.

What is a photovoltaic inverter?

One of the key components of the photovoltaic (PV) system is inverters due to their function as being an operative interface between PV and the utility grid or residential application. In addition, they can be employed as power quality conditioners at the point of common coupling (PCC).

Do microinverters improve conversion efficiency and low voltage stress?

The experimental results show an improved conversion efficiency and low-voltage stress on the power devices of the proposed microinverter. The disadvantage of the proposed modulation approach lies in the discontinuous current mode, which shows lower-power density in comparison with the CCM of flyback converters.

Can a flyback-based PV microinverter improve soft-switching capability?

This paper presents an effective solution for the flyback-based PV microinverter, which optimally integrates the technology of resonant circuit, adaptive modulation scheme, and active clamping to enhance soft-switching capability and system efficiency. The design and theoretical analysis are verified by simulation and experimental results.