Co-enhancement model of multiple ultra-high voltage converter stations resilience under seismic impact

Ultra-high voltage converter stations are one of the most critical power infrastructures to maintain stable and efficient power transmission over a long distance. Enhancing the resilience of converter stations against earthquakes becomes a priority task in modern power systems. In this article, considering the investment budget and space limitation for spare equipment in a converter station, a cooperative dispatching framework for multiple converter stations is proposed to achieve resilience enhancement. Driven by minimising the performance loss of converter stations subject to seismic impact, the co-enhancement model is dedicated to hardening equipment, spare parts allocation and the sequential repair scheme. Compared with the individual decision for each converter station in the traditional model, the emergency resources cooperative dispatching among multiple converter stations is considered in this model to achieve the mutual coordination of the available resources. The real-world ultra-high voltage converter stations in southwest China are chosen to validate the efficacy of the proposed model. The results demonstrate that the co-enhancement model can improve earthquake resilience through collaborative dispatching among multiple converter stations.