Study on Seismic Reliability of UHVDC Transmission Systems

Abstract EN

Electric power system is critical to maintain the welfare of the general public with impact on economic losses and other cascading.

In this paper, the seismic reliability of the ultra-high-voltage direct current (UHVDC) transmission system was evaluated from a perspective of the subsystem fault logic.

An assessment model of system seismic reliability was proposed based on the state enumeration method.

A case study was presented by taking a typical 800 kV UHVDC transmission system as the example.

The finite element models of major components in the UHVDC transmission system were established to evaluate their seismic reliability.

The results reveal that though the seismic reliability of major components seems satisfactory overall, the UHVDC transmission system may still suffer from seismic hazards to a certain degree due to the complexity of the full system.

This calls for a further enhancement in seismic design requirements of the electrical equipment.