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Coordinated Planning for Stability Enhancement in High IBR-Penetrated Systems

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arXiv:2404.14012v1 Announce Type: new
Abstract: Security and stability challenges in future power systems with high penetration Inverter-Based Resources (IBR) have been anticipated as the main barrier to decolonization. Grid-following IBRs may become unstable under small disturbances in weak grids, while, during transient processes, system stability and protection may be jeopardized due to the lack of sufficient Short-Circuit Current (SCC). To solve these challenges and achieve decarbonization, the future system has to be carefully planned. However, it remains unclear how both small-signal and transient processes can be considered during the system planning stage. In this context, this paper proposes a coordinated planning model of different resources to enhance system-level stability. The system strength and SCC constraints are analytically derived by considering the different characteristics of synchronous units and IBRs, which are further effectively linearized through a novel data-driven approach, where an active sampling method is proposed to generate a representative data set. The significant economic value of the proposed coordinated planning framework in both system asset investment and system operation is demonstrated through detailed case studies.

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