Impact Analysis of Non-Dispatchable Renewable Energies Penetration in Power System Operational Security
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Abstract
This study analyzes the impact of integrating non-dispatchable renewable energy generators into the National Interconnected System (SNI), focusing on the Yanahurcu wind project, which aims to add 52.8 MW of renewable generation to the system. To achieve this, a systematic methodology is proposed, consisting of three sequential and complementary types of analysis. First, a probabilistic power flow analysis is applied to assess the project's ability to contribute energy to the system under various operating conditions. Then, its impact on dynamic security is evaluated through time-domain simulations, considering its reactive power contribution during grid faults. Additionally, a generation adequacy assessment is performed, including key indicators such as the Loss of Load Probability (LOLP) and Expected Energy Not Supplied (EENS), which are essential to determine the system’s capacity to meet demand given the integration of non-dispatchable generation blocks. DIgSILENT PowerFactory is used for the electrical studies, allowing the integration of data and modeling of probability density functions. The results enable a proper evaluation of the project's operational security and confirm the effectiveness of the proposed methodology, which could be applied in Ecuador to assess the impact of future renewable energy projects.
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