Evolving power grids with self-organized intermittent strain releases: An analogy with sandpile models and earthquakes

Ho Fai Po, Chi Ho Yeung, An Zeng, and K. Y. Michael Wong
Phys. Rev. E 96, 052312 – Published 17 November 2017

Abstract

The stability of powergrid is crucial since its disruption affects systems ranging from street lightings to hospital life-support systems. While short-term dynamics of single-event cascading failures have been extensively studied, less is understood on the long-term evolution and self-organization of powergrids. In this paper, we introduce a simple model of evolving powergrid and establish its connection with the sandpile model and earthquakes, i.e., self-organized systems with intermittent strain releases. Various aspects during its self-organization are examined, including blackout magnitudes, their interevent waiting time, the predictability of large blackouts, as well as the spatiotemporal rescaling of blackout data. We examined the self-organized strain releases on simulated networks as well as the IEEE 118-bus system, and we show that both simulated and empirical blackout waiting times can be rescaled in space and time similarly to those observed between earthquakes. Finally, we suggested proactive maintenance strategies to drive the powergrids away from self-organization to suppress large blackouts.

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  • Received 20 September 2016
  • Revised 24 October 2017

DOI:https://doi.org/10.1103/PhysRevE.96.052312

©2017 American Physical Society

Physics Subject Headings (PhySH)

  1. Research Areas
Interdisciplinary Physics

Authors & Affiliations

Ho Fai Po1, Chi Ho Yeung1,*, An Zeng2, and K. Y. Michael Wong3

  • 1Department of Science and Environmental Studies, The Education University of Hong Kong, 10 Lo Ping Road, Taipo, Hong Kong
  • 2School of Systems Science, Beijing Normal University, Beijing 100875, People's Republic of China
  • 3Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong

  • *chyeung@eduhk.hk

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Issue

Vol. 96, Iss. 5 — November 2017

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