Static Voltage Stability Analysis of Large Scale Renewable Energy Delivered via Multi-Voltage-Level Transmission Sections

Le résumé fourni par la source

This paper addresses the static voltage stability constraints and complex coupling relationships in multi-voltage-level transmission sections for large-scale renewable energy integration systems. The study extracts two typical topological structures-parallel coupling and series coupling sections-from actual grid features and analyzes their interactive mechanisms affecting static voltage stability limits. Research reveals that in parallel systems, power flow distribution significantly impacts the overall transmission limit, with optimal limits achieved when heavily loaded branches concentrate on low-impedance paths. In series systems, the contribution of proximal station power growth to total transmission capacity exhibits nonlinear variation (sensitivity decreases with increasing output). Validated through actual grid simulations, the sensitivity of key node power flow to section limits is quantified, demonstrating that uniform power verification may cause conservatism or security risks. The findings provide theoretical support for online assessment of multi-level transmission section limit and active power optimization control, enhancing utilization rates while ensuring security to promote renewable energy accommodation.

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