Development trends and solutions for solar inverters
This article explores the latest development trends in solar inverters and the innovative solutions introduced by onsemi to address the challenges of future energy transition
Designers of solar inverters face a multidimensional challenge to ensure solar power continues to meet the growing demand for clean energy.
High reliability is another key design requirement in PV inverters. The temperature of the hottest component of 4-level flying capacitor operated at 32 kHz inductor current frequency is only 4K higher than the ANPC operated at 16 kHz. Nevertheless, any temperature rise has an effect on module lifetime.
PV Inverter systems require DC/DC boost converters, as part of the Maximum Power Point Tracker (MPPT), to adjust the PV panel output voltage to the required DC-link voltage level. This is then input into DC/AC converters which deliver the solar energy to the public grid. Figure 3. High-level block diagram of PV inverter
Historically, central-inverter systems have received the majority of investment. However, string-inverter systems are expected to become the dominant type in the next 5 years due to falling costs, increased flexibility and ease of maintenance. Central-inverter systems are based on multiple PV panels feeding into a single large inverter hub.
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