1-phase string inverter solutions | Infineon Technologies
Single-phase string inverters perform DC to AC power conversion on series-connected PV panels. The inverter optimizes the solar energy yield through maximum power point tracking (MPPT).
Single-phase string inverter systems convert the DC power generated by the photovoltaic (PV) panel arrays into the AC power fed into a 120 V / 220 V single-phase grid connection. The power rating typically ranges from 1kW to 10kW and is primarily used in residential market. The system's main components handle the DC-AC conversion.
There are numerous standards defining the interconnection and disconnection of single-phase inverters to utility grid available. The solar inverters are one of the most extensively researched topics in emerging power electronics due to their variety in circuit and control architectures.
This review focuses on common 'string' solar inverters, the most popular type. These inverters use one or more strings (groups) of solar panels connected in series. String solar inverters are the most common type used in the UK, Europe, Australia, and Asia. They are also growing in popularity in the US, where microinverters are extremely popular.
On the other hand, grid side control is requested to improve power quality and efficiency of inverter to ensure reliable operation. Therefore, grid side controller of solar inverter should meet grid interconnection requirements, provide secure grounding, and power decoupling features.
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