Positive Impact of the OLTC Blocking on the Voltage Stability

The contribution deals with the issue of the impact of the blocking of the automatic voltage regulator (AVR) on the TS/DS transformers located between the transmission and distribution system on the voltage stability of the transmission system (TS) in the event of a voltage decrease in the nodes of the TS. The contribution is a partial collaboration with the Slovak transmission system operator (TSO) Slovenská elektrizačná prenosová sústava, a.s. regarding to the assessment of voltage stability considering the scenario of increasing transit through TS SR.