Synchronization Options in the Transmission System in Case of the Reconfiguration

The purpose of reconfiguration in the power system of Slovak Republic is to decrease the power flow of the critical elements in the system. Therefore, in practice, the effect of the reconfiguration on the power loading of the individual elements in the system is monitored. On the other hand, less attention is paid to some additional negative impacts on the system, which may cause more problems in unexpected emergency conditions. Secondary, the non-fulfilment security criterion N-1 on other elements or limitation of the synchronization possibilities and restoration of basic grid topology are in terms of dispatch control the most critical. The article presents the problem of restoration of the basic grid topology during the violation of the synchronization conditions. The problem was measured by WAMS during the real-time operation in case of reconfiguration in 400 kV substation Lemešany and Varín during switching in the field of combined busbar coupler.