As the power conversion equipment of photovoltaic power station, inverter occupies a pivotal position in the whole power station. Photovoltaic inverter is a power electronic device that converts low-voltage direct current generated by the module into alternating current. It is connected to the load or incorporated into the power grid. It is the core device in the photovoltaic system. Grid-connected inverter has the following main functions:
The direct current generated by photovoltaic modules is converted to alternating current
Through the maximum power tracker, the maximum power point (MPP) is dynamically found and utilized to maximize the available power
Recording Running Data
Provide current, voltage and local grid protection
What are the classification of inverters?
In terms of product types, inverter products are mainly divided into four categories at present, namely:
Centralized inverter (power range: 250KW-10MW, mainly used in large ground power stations)
Distributed inverter (power range: 1MW-10MW, mainly used in complex large ground power stations)
Cluster series inverter (power range is 1.5KW-250KW, mainly used for household, industrial and commercial distributed and ground power stations, etc.)
Micro inverter (power range is generally below 4kW, mainly used in distributed small and medium-sized power stations. Based on the consideration of photovoltaic safety, it is more and more applied to large industrial and commercial distributed power stations.)
The micro inverter can invert each component in the system and carry out independent MPPT control, which can greatly improve the overall efficiency, but also avoid the traditional inverter some DC high voltage, poor light effect, barrel effect, etc.