Smartly connecting AC grids and parallel LCC-HVDC

What is it about?

This paper presents a synchronized, dual-layer control strategy combining Conventional Power System Stabilizers and Power Oscillation Damping controllers to prevent grid instability during AC faults in hybrid LCC-HVDC systems. The framework mitigates severe power oscillations and prevents blackouts by coordinating multi-link HVDC power modulation to absorb surges from commutation failures.

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Photo by Federico Beccari on Unsplash

Photo by Federico Beccari on Unsplash

Why is it important?

This research addresses critical vulnerabilities in modern power grids by proposing dual-layer control frameworks (CPSS + POD) that prevent cascading failures in parallel AC/DC systems, which can lead to widespread blackouts. By optimizing high-voltage direct current (HVDC) links, the approach enhances stability, facilitates large-scale renewable energy integration, suppresses destructive power oscillations, and maximizes existing grid capacity without new infrastructure.

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