TEİAŞ confirms route for 400 kV Konya to Sivrihisar line

Turkish transmission system operator TEİAŞ has defined the official corridor for the planned 400 kV transmission line linking Konya Kuzey to Sivrihisar in Eskişehir province. Designed to support bulk energy transport for the İGA solar power plant, the link establishes an extra-high-voltage corridor across central Anatolia. TEİAŞ will purchase the land required for pylon foundations while establishing servitude easements along the clearance corridor.

Finalising the alignment removes a major permitting bottleneck for regional clean power evacuation. Central Anatolia offers high solar irradiance, attracting substantial photovoltaic development, yet local networks lack the thermal capacity to absorb heavy midday generation. Transporting bulk generation over long distances requires a 400 kV backbone to minimise electrical losses and avoid curtailment at generation sites.

For substation engineers and grid operators, the route determination sets concrete technical requirements for terminating substations. Introducing a 400 kV overhead line demands new switchgear bays, protection relays, and reactive power compensation equipment. Large solar inflows cause pronounced diurnal fluctuations in network voltage. Terminating substations must incorporate shunt reactors and dynamic compensation to counterbalance line capacitance during low solar output and nocturnal periods, while transformers must withstand continuous thermal cycling from variable renewable output.

What this means for asset owners in Türkiye: Generation operators and substation asset owners in Türkiye must anticipate coordinated maintenance outages at terminal substations during line connection works. Asset managers should review transformer dynamic loading tolerances to prevent accelerated insulation aging under variable solar influx, while procurement teams must schedule long switchgear delivery lead times well ahead of planned energisation dates.