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Reasonable design of major substation in load center ensures the rationality of overall network infrastructure and maintains system load serving capability. In the paper, a risk-based approach is proposed to evaluate substation loadability in transmission planning process. A variety of contingencies was applied to estimate loss of load using sensitivity analysis. Risk indices of load loss for incremental...
A new intelligent system (IS) is developed for real-time dynamic security assessment (DSA) of power systems. Taking an ensemble learning scheme, the IS structures a series of extreme learning machines (ELMs) and generalizes the randomness of single ELMs during the training. Benefiting from the unique properties of ELM and the strategically designed decision-making rules, the IS learns and works very...
Renewable energy integration with the power systems will change the power systems in many ways. Renewable resources in remote areas will trigger extensive transmission upgrades to deliver green energy to the load centers. The intermittent and non-dispatchable characteristics of the renewable resources will impact both long-term system adequacy and real-time system security. Uncertainty of the development...
Ensuring the reliable operation of the power grid is more challenging, and vital, than ever. Industry restructuring presents transmission system planners with a range of uncertainties that traditional methods cannot address. EPRI's Probabilistic Reliability Assessment (PRA) program offers energy companies new, more-accurate tools for assessing grid reliability under restructured market conditions...
EPRI has developed a probabilistic risk assessment (PRA) method under power delivery reliability initiative. Unlike the traditional deterministic contingency analysis, PRA combines a probabilistic measure of the likelihood of undesirable events with a measure of the consequence of the events into a single index. EPRI internally developed the PRA program that uses contingency analysis results as well...
Unlike the traditional deterministic contingency analysis, probabilistic risk assessment (PRA) combines a probabilistic measure of the likelihood of undesirable events with a measure of the consequence of the events (that is, the impact) into a single index - probabilistic risk index (PRI). The developed PRA program uses contingency analysis results as well as the transmission facility outage information...
System restoration is an integral part of the overall defense system against catastrophic outages. The nature of system restoration problem involves status assessment, optimization of generation capability and load pickup. The optimization problem needs to take into numerous practical considerations and, therefore, it cannot be formulated as one single optimization problem. The other critical consideration...
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