学术报告第201857期

报告题目：Network-induced multistability: Lossy coupling and exotic solitary states

报 告 人：Juergen Kurths

报告时间：2018年10月17日15：00

报告地点：南一楼中311

Abstract:

The stability of synchronised networked systems is a multi-faceted challenge for many natural and technological fields, from cardiac and neuronal tissue pacemakers to power grids. In the latter case, the ongoing transition to distributed renewable energy sources is leading to a proliferation of dynamical actors. The desynchronization of a few or even one of those would likely result in a substantial blackout. Thus the dynamical stability of the synchronous state has become a focus of power grid research in recent years.

We show that the non-linear stability against large perturbations is dominated and threatened by the presence of solitary state in which individual actors desynchronise. Remarkably, when taking physical losses in the network into account, the back-reaction of the network induces new exotic solitary states in the individual actors, and the stability characteristics of the synchronous state are dramatically altered. These novel effects will have to be explicitly taken into account in the design of future power grids, and their existence poses a challenge for control.

Short Biography:

Prof. Jürgen Kurths

Professor of the Institute of Physics at the Humboldt University, Berlin.

https://www.pik-potsdam.de/members/kurths

He is German physicist and mathematician. He is a chair of the research domain Transdisciplinary Concepts of the Potsdam Institute for Climate Impact Research and Professor of Nonlinear Dynamics at the Institute of Physics at the Humboldt University, Berlin.

His research is mainly concerned with nonlinear physics and complex systems sciences and their applications to challenging problems in Earth system, physiology, systems biology and engineering.

Jürgen Kurths is an elected fellow of the American Physical Society and a member of the Academia Europaea. He received an Alexander von Humboldt research award and a 1000 Talents award for foreign experts from China and was awarded the L.F. Richardson Medal of the European Geosciences Union. He was bestowed with a Dr. honoris causa from the Lobachevsky University in Nizhny Novgorod in 2008 and one from the Chernishevsky University, Saratov. He is honorary professor at the University of Potsdam and at the Aberdeen University, a guest professor at the Southeast University in Nanjing, was a Burgers Visiting Professor at University of Maryland and is a Chapman Professor at the University of Alaska (Fairbanks). He is editor-in-chief of the AIP journal CHAOS and is in the editorial board of more than 10 journals. His H-index is 86 and he is a highly cited researcher.