Spare Parts Management Strategy for Seismic Resilience Improvement of Ultra-high Voltage Converter Station Converter Station

Improving resilience of power system is an important aspect of smart grid research. Ultra-high voltage (UHV) converter station serves as core node for power grid and appropriate spare parts can significantly shorten post-earthquake repair time of the converter station and therefore enhance its seismic resilience. This article takes spare parts strategy of the UHV converter station under budget constraint as its research object. Firstly, a functional component model of the UHV converter station is established, and post-earthquake transmission function indicator and seismic resilience index R with per-unit characteristics are defined. Subsequently, the two-stage stochastic programming (TSSP) method was employed to construct a two-stage optimization model for the seismic resilience improvement of the UHV converter station. The sample average approximation (SAA) method was used to solve the model. Lastly, the effectiveness of the proposed method was validated using data from the ± 800kV UHV converter station.