Coordinated security analysis

Coordinated Security Analysis

The aim of the Coordinated Security Analysis (CSA) service is to ensure the constant operation of the power system taking into account the operational security of the transmission network and the recommended remedial actions both from South East Europe (SEE) RSC, Selene CC, and the SEE TSOs (IPTO, ESO and Transelectrica). 

The concept is to find limit violations in base case and in contingency case and to suggest remedial actions to remove them. The CSA process uses the CGM and performs the security analysis, N0 and N-1 contingency analysis, considering the contingencies provided by the SEE TSOs in order to detect the violations. The security analysis simulates the power system in its normal steady-state and operation of the expected network elements (base case) and the power system in the case of occurrence of a failure (contingency case), as loss of generators or disconnection of transmission components e.g. lines, transformers, switches. If there are any limit violations identified, then remedial actions from a list, preventive and curative, which are pre-defined by the SEE TSOs, are applied by the RSC operator in order to resolve the eventual violations. The remedial actions include:

  • changes of network topology and network elements (e.g. taps of phase shifting transformers-PST),
  • redispatching and countertrading.

Selene CC executes the CSA process on a day-ahead basis consider DACF (Day-ahead congestion forecast) IGM files and along with the participating TSOs propose and decide about the remedial actions needed to relief the contingencies of the grid. Finally, the TSOs are fully responsible whether to accept or reject the remedial actions and implement them.

For a brief explanation of the Coordinated Security Analysis, please click on the image below.