Delta, a company specializing in power and heat management solutions, is supplying its highly efficient M70A series of PV string inverters to Anumar, an engineering, procurement and construction (EPC) service provider who is building the 120 MWp solar park Schornhof project, currently the largest ground-mounted solar park in South Germany.
The conformity of the M70A inverters with the new technical VDE connection rules for high voltage (VDE-AR-N 4120) was a decisive factor in Anumar’s selection of Delta. So far, around a third of the 1,500 Delta M70A inverters required for the project have been used in the solar park.
“With a project as large as the Schornhof solar park, it was particularly important to us to have a trustworthy partner who can respond quickly to our needs,” says Markus Brosch, CEO of Anumar. “We have been installing Delta equipment for many years and have partnered with them on several solar power projects. During these projects, Delta has always provided us with fast and easily accessible support. “
Only half of the 150 hectare site is covered with solar modules. The remaining 70 hectares will be converted into a “green harbor” in order to promote biological diversity. In this part of the project, approximately 50,000 new shrubs and trees will be planted, keeping the existing perimeter timbers.
The energy conversion from the solar modules to the grid feed point takes place in three steps. In the first stage, the solar energy from up to 12 module strings – a maximum of 70 kW – is combined into an inverter and converted there into an alternating voltage of 400 VAC. In the next stage, the energy from up to 30 inverters is then transferred to one of the 60 or more transformers, which increase the voltage level to 20 kV. The energy is transferred from the transformers to the substation specially built for the solar park. Finally, the voltage level is increased to 110 kV so that the energy can be fed into the high-voltage transmission network.
The Schornhof solar park project in the Neuburg-Schrobenhausen district southwest of Ingolstadt should be completed by the end of the first quarter of 2021. It is financed with 90 MW power purchase agreements (PPA) and funds from German renewable energies. Sources Act (EEG).
Photo: Delta’s M70A PV string inverters are used in the largest ground-mounted solar park in southern Germany