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[Fizinfo] Emlékeztető: EK MFA szeminárium, Ódor Géza, 2023 december 13, szerda 11 óra

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  • From: Horváth Zsolt Endre <horvath.zsolt.endre AT>
  • To: energiausers AT, wignerusers AT, fizinfo AT
  • Subject: [Fizinfo] Emlékeztető: EK MFA szeminárium, Ódor Géza, 2023 december 13, szerda 11 óra
  • Date: Wed, 13 Dec 2023 08:40:52 +0100
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Kedves Kollégák!

Ez az előadás ma délelőtt lesz:

2023 december 13-án szerdán 11 órakor az MFA tanácstermében (KFKI 26. épület 1. emelet) kerül sor

Ódor Géza
Elektromos hálózatfejlesztés és nemlokális szinkronizáció paradox viselkedései, avagy hogyan segít az önszerveződő kritikusság
c. előadására.
Géza Ódor, Bálint Hartmann, István Papp, Kristóf Benedek, Shengfeng Deng and Jeffrey Kelling

Cascade failures in power grids occur when the failure of one component or subsystem causes a chain reaction of failures in other components or subsystems, ultimately leading to a widespread blackout or outage. Controlling cascade failures on power grids is important for many reasons like economic impact, national security, public safety and even rippled effects like troubling transportation systems. Monitoring the networks on node level has been suggested by many, either controlling all nodes of a network or by subsets. This study identifies sensitive graph elements of the weighted European power-grids (from 2016, 2022) by two different methods. Bridges are determined between communities and "weak" nodes are selected by the lowest local synchronization of the swing equation. In the latter case we add bypasses of the same number as the bridges at weak nodes, and we compare the synchronization, cascade failure behavior by the dynamical improvement with the purely topological changes. The results are also compared if bridges are removed from networks, which results in a case similar to islanding, and with the addition of links at randomly selected places. Bypassing was found to improve synchronization the best, while the average cascade sizes are the lowest with bridge additions. However, for very large or small global couplings these network changes do not help, they seem to be useful near the synchronization transition region, where self-organization drives the power-grid. Thus, we provide a demonstration for the Braess’ Paradox on continent-sized power grid simulations and uncover the limitations of this phenomenon. We also determine the cascade size distributions and justify the power-law tails near the transition point on these grids.

A   szemináriumon minden érdeklődőt szívesen látunk!

Horváth Zsolt Endre
Szeminárium koordinátor

Dr. Zsolt E. HORVÁTH
Institute for Technical Physics and Materials Science,
HUN-REN Centre for Energy Research
Konkoly Thege Rd. 29-33, 1121 Budapest,
Mail: P.O.Box 49, H-1525 Budapest, Hungary
Phone: +36-1-392-2680, Fax: +36-1-392-2226
e-mail:horvath.zsolt.endre AT
<mailto:horvath.zsolt.endre AT>

  • [Fizinfo] Emlékeztető: EK MFA szeminárium, Ódor Géza, 2023 december 13, szerda 11 óra, Horváth Zsolt Endre, 12/13/2023

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