Low voltage bidirectional energy storage inverter

What is a bidirectional inverter stage?

The inverter stage is bidirectional, enabling power conversion from DC stage to AC stage and vice versa. The topology is constituted by an H-Bridge with each group of diagonal switches operating at high frequency during one half-wave of output voltage.

What is a bi-directional converter?

Bi-directional converters use the same power stage to transfer power in either direction in a power system. This helps reduce peak demand tariff, reduces load transients, and enables quick changes in the direction of power transfer. They have high efficiency, up to 97% at power levels up to 22KW.

What are the benefits of using bi-directional converters?

Bi-directional converters reduce peak demand tariff, reduce load transients, and provide V2G capabilities with quick power transfer direction changes. They also offer high efficiency (>97%) at power levels up to 22KW. These converters use the same power stage to transfer power in either direction in a power system.

How much power does a DC-link inverter have?

In boost mode, since this converter supplies the inverter through the DC-link, the discharge power is limited to 4.6kW, the limitation being the maximum power rating of the inverter stage. Depending on the battery voltage, this value can go up to 30A.

What is a bidirectional DC/DC converter?

As previously mentioned, the bidirectional DC/DC converter is an interleaved DC/DC converter with the capability to either work as a buck converter when charging the battery or work as a boost converter when charging the DC Bus, hence the DC/AC converter from the battery. The specifications for this stage can be seen in Table 3-2. Table 3-2.

What type of inverter does a commercial PV system use?

Large commercial PV and utility installations can use a single, central, three-phase inverter. The central approach is used mainly for remote large-scale installations above about 10 MW, where high power can be efficiently transformed and fed directly into a transmission grid.