A Safety Evaluation Method for a Power System Influenced by a Geomagnetic Storm

Shu-Ming Zhang,Lian-Guang Liu

doi:10.1109/access.2020.2994644

Abstract

Geomagnetic storm disasters have a significant impact on the safe and stable operation of power systems. Serious geomagnetic storm disasters can lead to cascading accidents in power systems, up to and including voltage collapse accidents. Therefore, it is necessary to analyze and evaluate the operational risks of power systems under magnetic storms. Based on the mechanisms of the cascading failures caused by geomagnetic storms, the technical requirements for the power system safety assessment of geomagnetic storm disasters are analyzed, and an evaluation method is proposed. The key problems and evaluation systems to be solved are also discussed in this paper. A simulation method for the interactions between geomagnetically induced currents (GIC) and power systems is proposed, and a simulation is carried out based on MATLAB and the PowerWorld simulation software. The simulation results show that this method can accurately reflect the impact of faults on power systems and their cascading failures. The present research results provide a reference for further quantifying and preventing the power grid risks caused by magnetic storms.

Highlights

Regarding the consequences of the strong solar storm, it is expected that the function of satellites, energetic sources, communication and navigation systems will be disrupted, secondary effects will occur in transport, safety and emergency systems, telecommunications and other wireless and electronic devices [1]
This paper focuses on the key problems to be solved, establishes an integrated hybrid model of magnetic storms and power systems, achieves a hybrid simulation of magnetic storm disturbances and electrical responses
In order to quantitatively analyze the influence of magnetic storm on VOLUME 8, 2020 power system, this paper proposes geomagnetically induced currents (GIC) reactive power loss disturbance degree index and GIC reactive power loss disturbance entropy as risk quantitative evaluation index

Summary

Introduction

Regarding the consequences of the strong solar storm, it is expected that the function of satellites, energetic sources, communication and navigation systems will be disrupted, secondary effects will occur in transport, safety and emergency systems, telecommunications and other wireless and electronic devices [1]. The harmonic effect and the influence of load capacity should be simulated with a transformer model, which is necessary to analyze the risk of magnetic storm disasters in the power grid [20], [21].

Results

Conclusion