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Ensuring system reliability and security while operating electricity markets is the primary responsibility of independent system operators. Maintaining system security in real-time is a significant challenge due to limited time frame permitted for analyzing and responding to security issues. This paper focuses on the applications designed to address static security in the real-time operations of ERCOT...
Hydro-Québec has a long interest in on-line dynamic security assessment (DSA) necessitated by its challenging power network dynamics (transient, fast and slow voltage collapse). We are presently using off-line calculated security indicators and an on-line monitoring system approach. Every 5 seconds our system provides dynamic security limits, the impact of each out-of-service component, simple guidelines...
In real-time operations, online DSA applications can be used not only to perform security assessment for the current operating point but also to search boundaries of security region for operations staff to prepare for the next step generation dispatch and calculate transfer limits for market operations. This paper analyses the issues that were encountered when dealing with future re-configurations...
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