The ADI Group, in partnership with PDL Transformation, has begun construction of key infrastructure for the power output from large-scale renewable energy sources. The first phase of the construction of the R-SAH substation - specifically the construction of the 400 kV portal - has officially begun. This new 110/400 kV substation will be used to connect the wind and photovoltaic projects that ADI Group is developing in the area in question.
The R-SAH substation will become the first private facility of its kind in the Czech Republic to allow the direct output of RES to the transmission grid. The main role in this process will be played by a 400 MVA transformer, which will ensure the transformation of energy from the local 110 kV grid to the 400 kV transmission level.
Strategic solutions for the efficient use of renewable resources
As the share of renewables in the Czech Republic's energy mix grows, so does the need for robust infrastructure to ensure their effective integration into the electricity grid. The R-SAH substation is an essential element in this respect - it will enable centralised power output from several upcoming RES projects in the vicinity and ensure a stable and secure connection to the transmission system grid.
The development of wind and solar energy is taking place in parallel within the ADI Group and the projects are designed as complementary - in terms of generation and grid load. This significantly increases the efficiency of the utilisation of the substation capacity and the connected infrastructure, which is in line with the current decarbonisation targets.
First of its kind - a private substation connected to 400 kV
From an energy market perspective, this is a breakthrough project. The R-SAH substation is the first private substation in the country to be connected directly to the 400 kV voltage level and at the same time connected to the transmission grid. This opens up the possibility for the first time of independent power output from RES outside the distribution grid, which is already capacity constrained in some regions.
The facility will include, among other things:
- 400 MVA transformer (400/110 kV),
- 400 kV high voltage gantry and other necessary substation equipment,
- 110 kV feeders for connection of individual RES sources.
An important milestone for the energy of the future
The start of construction of this substation is an important milestone not only for the ADI Group, but also for the entire segment of renewable energy development in the Czech Republic. The project demonstrates that the private sector is ready to invest in energy infrastructure and deliver solutions that are technically and conceptually comparable to state or parastatal investments.
The R-SAH substation will become the backbone of a new generation of RES projects that will contribute to meeting climate goals, reducing dependence on fossil sources and increasing self-sufficiency in electricity generation.
With this,ADI Group and PDL Transformation confirm their role as innovators and leaders in sustainable energy. The construction of the portal is the first step - followed by the installation of the transformer arrays, the connection of RES sources and the final commissioning in line with the 2026 plan.