Poland power frequency isolation 120kw inverter

What is microtransformer based isolation integration?

Microtransformer based isolation integration is the ideal solution for the isolation needs for grid-tied PV inverters, central inverters, or microinverters.

What is a multi-inverter parallel system?

For a multi-inverter parallel system as the case for string inverters, there are also needs for communication among the inverters, and they are realized typically through an RS-485 bus, an RS-232 bus, or a CAN bus where isolation would be required.

How is a power transformer isolated?

Isolation between the input and output is provided by the insulation layers between the primary coil and the secondary coil. For efficient power transfer across isolation, a self oscillating high frequency oscillator is used to drive the primary for the power transformer, and high frequency Schottky diodes are used to provide rectified dc voltage.

What are the different types of PV inverters?

There are two major types of PV inverters, transformer-less and transformer isolated ones. Transformer-less inverters can suffer from large ground leakage current and injected dc current because of large panel capacitance and lack of isolation between the PV panel and ac grid, as shown in Figure 1 (a).

Why do PV inverters need RS-485 or RS-232?

RS-485 or RS-232 is typically used for communication to these PV inverters to obtain real-time performance data, and the communication bus needs to be isolated because of the large distance of travel and for safety reason. An isolated CAN may also be used for communication over not as large distances.

Are microinverters better than optocouplers?

Traditional isolation solutions such as optocouplers can’t satisfy the 25 year warranty typical for PV panels. Microinverters also become the trend where the system availability is improved and performance under shading condition is also dramatically improved.