A Resilience Assessment Framework for Distribution Systems Under Typhoon Disasters

Yuantao Wang,Xiang Li,Jian Tang,Zhenjie Wu,Yajun Mo,Yixi Zhou,Tao Niu,Lin Xue,Sicong Sun,Tianen Huang

doi:10.1109/access.2021.3128967

Yuantao Wang, Xiang Li + Show 8 more

Open Access

https://doi.org/10.1109/access.2021.3128967

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Abstract

With the increase of extreme natural disasters and the frequent occurrence of man-made attacks, resilience studies of power grids have attracted much attention, among which resilience assessment reflects the resistance and resilience of power systems to cope with extreme disasters. To improve the resilience of distribution grids under extreme weather conditions, this paper proposes a resilience assessment framework for distribution grids under typhoon disasters. First, a probabilistic generation model of typhoon is established. Second, a spatiotemporal vulnerability model of the distribution grid lines to quantify the spatiotemporal impacts of typhoon. Third, a breadth-first search algorithm is used to island the distribution grid, and the amount of load shedding of the islanded microgrid is calculated. Meanwhile, the resilience of the distribution grid was quantitatively assessed according to the proposed new resilience index. Finally, the feasibility of the proposed resilience assessment method is verified in the IEEE 33-bus test system, and the results show that the proposed method can accurately account for the impact of typhoon on the distribution grid and provides a quantitative reference basis for later power system planning and scheduling.

Highlights

The impact of extreme weather on power grids has received widespread attention, such as the snowstorm in China in 2008 and Hurricane Sandy in the United States in 2012, which cause to grid lines damage and tower toppling, widespread power outages and huge economic losses [1]
Multiple failures often occur in the distribution grid, and the N-1 safety criterion of the distribution grid alone is not sufficient to guarantee the safe operation of the distribution grid
2) To quantify the impact of typhoons on lines, a vulnerability model of distribution grid lines is established and the cumulative failure probability density function of each line is constructed to lay the foundation for the subsequent resilience assessment model

Summary

INTRODUCTION

The impact of extreme weather on power grids has received widespread attention, such as the snowstorm in China in 2008 and Hurricane Sandy in the United States in 2012, which cause to grid lines damage and tower toppling, widespread power outages and huge economic losses [1]. To construct a model for the impact of typhoons on distribution grids, [8] proposed a formula for calculating the magnitude of wind speed within a wind field and used a fragility curve to calculate the reliability of distribution grid lines. 2) To quantify the impact of typhoons on lines, a vulnerability model of distribution grid lines is established and the cumulative failure probability density function of each line is constructed to lay the foundation for the subsequent resilience assessment model. To accurately assess the impact of the typhoon model on distribution grid lines, this section establishes a detailed typhoon model based on the location of typhoon landing, central pressure difference, wind speed, maximum radius, and typhoon movement speed.

TYPHOON SCENARIO GENERATION MODEL

DISTRIBUTION GRID OPTIMIZATION MODEL CONSIDERING ENERGY STORAGE

CASE STUDY

Findings

CONCLUSION