Voltage Optimizers Have Irreplaceable Advantages In System Applications

Voltage Optimiser has irreplaceable advantages in system applications, especially after the development of transformerless full-bridge inverter technology, high-efficiency, lightweight and low-priced TL inverters are very popular in the market. Multi-MPPT technology has played a significant role in promoting the diversity of system design and the improvement of production efficiency. However, string inverters also face an inevitable challenge, which is how to adjust and limit the impact of unpredictable shadow coverage on the maximum power point of array output. Although multi-MPPT can relatively improve the impact of shaded components or strings on the entire system, since string inverters are multi-component-level conversion devices, some electric energy must be sacrificed to "sacrifice the small and protect the big." String inverters require the input components to maintain the same direction and inclination, and it is best not to have any obstruction, but this is only applicable to some roofs. Some double-layer roofs have two inclination angles, and some roofs have a small area facing north, which is a problem for system design and inverter control. Therefore, single-component-level tracking and conversion equipment has attracted more and more attention from users, and the representative ones are micro inverters and power optimizers. Micro inverters complete the conversion of DC to AC under ultra-low voltage (ELV) conditions, and usually require no more than two components in series. Recently, Altenergy Power System Inc (APS) has developed a three-phase micro inverter with four components in parallel. Although it has not yet been certified by the Australian Clean Energy Council (CEC), and based on the limited information I have learned, I think there is still room for improvement in the application and safety performance of the product, but this progress has indeed played a further role in promoting the transition of future civilian small and medium-sized power stations to single-component-level optimization systems. Compared with micro inverters, I personally believe that power optimizers will have greater promotion potential in terms of technology and application.