ELFT HÍRADÓ

[Horváth Zsolt Endre <horvath.zsolt.endre AT ek.hun-ren.hu>]

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.
Abstract
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 ek.hun-ren.hu  
<mailto:horvath.zsolt.endre AT energia.mta.hu>