Coordinated Security Analysis
Coordinated Security Analysis (CSA) is one of core RCC services with the main purpose to identify operational security risks. CSA process is performed in two forecast horizons:
Day Ahead Congestion Forecast (DACF) and Intraday Congestion Forecast (IDCF) procedure.
After creating Common Grid Models (CGMs), SCC continues the DACF and IDCF procedure by conducting security analysis. Beside CGMs, input data for CSA process are Contingencies and Critical Network Elements (CNE). Contingency represents the network element (lines, transformers, nodes, generators, loads, etc.) for which specific TSO wants to simulate its disconnection from the network in order to obtain information about potential congestion after disconnection. In some cases, TSOs request simulation of disconnection of multiple simultaneous elements which could occur in real life (e.g. disconnection of parallel lines on same line corridor). These N-X disconnections are also simulated in SCC’s security analysis. On the other hand, CNE represents important network element which overload (after given Contingency) could jeopardize national or regional security of supply. During each simulation of N-X Contingency, our tool is continually monitoring CNEs in order to detect potential security issues.
OPERATIONAL CADENCE
Four times a day
SCC performs security analysis at four times a day – once for the upcoming 24 hours in DACF procedure and three times for upcoming eight hours within the IDCF process. The security analysis is done on a CGM of Continental Europe. The results of the security analysis are forwarded to the TSO service users at the end of the DACF and IDCF procedures in the form of statistical reports. Based on the CSA results, TSOs are in position to get a deep insight into system state before real time and, in case of need, to prepare network for taking the necessary remedial actions.
REMEDIAL ACTIONS
Simulating and optimising RAs
By obtaining new operational software tool during 2020, SCC gets the opportunity to provide TSO service users with the ability to simulate Remedial Actions (RAs). For each pair of Critical Network Element and Contingency (CNEC), TSOs are in position to provide potential RAs, which are activated in the CGM only if CNE is overloaded after simulation of given Contingency. The goal of RAs is to provide insight to TSOs how potential congestions could be solved.