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Simultaneous Robust State Estimation, Topology Error Processing, and Outage Detection for Unbalanced Distribution Systems [article]

Zahra Soltani, Shanshan Ma, Mojdeh Khorsand, Vijay Vittal
2021 arXiv   pre-print
simultaneously: (1) Limited locations of measurement devices and unsynchronized measurement data as well as missing and bad data, (2) Complicated mixed-phase switch actions and mutual impedances, and  ...  A single snap-shot mixed-integer quadratic programming (MIQP) optimization framework is proposed to cope with these challenges.  ...  mixed-phase switch operations in the unbalanced distribution systems.  ... 
arXiv:2105.10111v1 fatcat:j2f74io4pzhzde5bxvd7gvnycu

Distributed Mixed Voltage Angle and Frequency Droop Control of Microgrid Interconnections with Loss of Distribution-PMU Measurements [article]

S Sivaranjani, Etika Agarwal, Vijay Gupta, Panos Antsaklis, Le Xie
2020 arXiv   pre-print
We model the microgrid interconnection with this primary control architecture as a nonlinear switched system and design distributed secondary controllers to guarantee transient stability of the network  ...  interconnections with high penetration of renewable distributed energy resources (DERs).  ...  Then the stability of the microgrid interconnection with the new system topology with respect to disturbances w(t) even under D-PMU measurement losses is guaranteed by the following robustness result.  ... 
arXiv:1810.09132v3 fatcat:vxdkg7rw65gurolmf2ittbmkkq

Distributed Mixed Voltage Angle and Frequency Droop Control of Microgrid Interconnections with Loss of Distribution-PMU Measurements

S. Sivaranjani, Etika Agarwal, Vijay Gupta, Panos Antsaklis, Le Xie
2020 IEEE Open Access Journal of Power and Energy  
We model the microgrid interconnection with this primary control architecture as a nonlinear switched system and design distributed secondary controllers to guarantee stability of the network.  ...  Index Terms-Microgrids, phasor measurement units, interconnected system stability, distribution systems, droop control. This work is licensed under a Creative Commons Attribution 4.0 License.  ...  Then the stability of the microgrid interconnection with the new system topology with respect to disturbances w(t) even under D-PMU measurement losses is guaranteed by the following robustness result.  ... 
doi:10.1109/oajpe.2020.3047639 fatcat:ynvqldwzmbhzln3x53oc76gyym

Intra-data-center traffic engineering with ensemble routing

Ziyu Shao, Xin Jin, Wenjie Jiang, Minghua Chen, Mung Chiang
2013 2013 Proceedings IEEE INFOCOM  
Based on the Markov approximation framework, we solve the VLAN assignment problem with a general objective function and arbitrary network topologies by designing approximation algorithms with close-to-optimal  ...  Ensemble routing was proposed to achieve management scalability and robustness by using Virtual Local Area Networks (VLANs) and operating on the granularity of flow ensembles, i.e. group of flows.  ...  Figure 1 shows an example of VLAN configuration on a fully connected (clique) topology with four switches.  ... 
doi:10.1109/infcom.2013.6567017 dblp:conf/infocom/ShaoJJCC13 fatcat:6kbjmb4akbdtfipkxdnpwrqgpa

Topologically Protecting Squeezed Light on a Photonic Chip [article]

Ruo-Jing Ren, Yong-Heng Lu, Ze-Kun Jiang, Jun Gao, Wen-Hao Zhou, Yao Wang, Zhi-Qiang Jiao, Xiao-Wei Wang, Alexander S. Solntsev, Xian-Min Jin
2021 arXiv   pre-print
We measure the cross-correlations at different evolution distances for various topological sites and verify the non-classical features with high fidelity.  ...  Here, by introducing the topological phase, we experimentally demonstrate the topologically protected nonlinear process of spontaneous four-wave mixing enabling the generation of squeezed light on a silica  ...  We verify the topological protection of quantum resources by measuring the transport dynamics such as light filed distributions, the cross-correlations by switching incident pump light into different input  ... 
arXiv:2106.07425v1 fatcat:nnwwekr3wjbc5iu7xi5yhi7k6a

Existence of nontrivial topologically protected states at grain boundaries in bilayer graphene: signatures and electrical switching

W. Jaskólski, M. Pelc, Leonor Chico, A. Ayuela
2016 Nanoscale  
grain boundaries with atomic-scale topological defects.  ...  This effect, linked to defect states, should be detectable in transport measurements and could be exploited in electrical switches.  ...  The sublattice and layer distribution of S1 and S2-D are rather similar, and they share a remarkable feature: both are mostly localized at the mixing atoms.  ... 
doi:10.1039/c5nr08630b pmid:26931739 fatcat:xcbu4r72bzfchh2jwdwxhtbuwe

On the energy efficiency of MapReduce shuffling operations in data centers

Sanaa Hamid Mohamed, Taisir E. H. El-Gorashi, Jaafar M. H. Elmirghani
2017 2017 19th International Conference on Transparent Optical Networks (ICTON)  
Mixed Integer Linear Programming (MILP) models are utilized to optimize the shuffling in several data center topologies with electronic, hybrid, and all-optical switching while maximizing the throughput  ...  This paper aims to quantitatively measure the impact of different data centers networking topologies on the performance and energy efficiency of shuffling operations in MapReduce.  ...  The input data is stored in several servers' local disks and is globally managed by a distributed file system (DFS) [1] .  ... 
doi:10.1109/icton.2017.8024733 fatcat:vftbjiwvvbcrherafsmill6gie

Optimal network reconfiguration for congestion management optimization in active distribution networks

M. Alonso, H. Amaris, B. Rojas, Davide Della Giustina, A. Dedè, Zaid Al-Jassim
2016 The Renewable Energies and Power Quality Journal (RE&PQJ)  
When congestion takes place, distributed switches can be controlled to change their status in order to find a new optimal network configuration that solves that congestion.  ...  Switches and controllable voltage units such as PV units were used in the optimization process.  ...  Acknowledgement The research leading to these results has received funding from the European Union seventh framework program FP7-SMARTCITIES-2013 under grant agreement 608860 IDE4L -Ideal grid for all.  ... 
doi:10.24084/repqj14.503 fatcat:fcmavo5tfrajjl6gzgavntjfne

Short-term load forecasting based automatic distribution network reconfiguration

Huaiguang Jiang, Fei Ding, Yingchen Zhang
2017 2017 IEEE Power & Energy Society General Meeting  
In a traditional dynamic network reconfiguration study, the optimal topology is determined at every scheduled time point by using the real load data measured at that time.  ...  The network reconfiguration problem is solved by using the forecasted load continuously to determine the optimal network topology with the minimum amount of loss at the future time.  ...  As a result, the network reconfiguration problem is finally formulated as a mixed-integer nonlinear optimization problem with switch states as the only decision variable. (7) ( ) ( ) { } ( ) ( ) { }   ... 
doi:10.1109/pesgm.2017.8274209 fatcat:tzyfzwui6rfhnevda6k6dwgat4

Reducing complexity in tree-like computer interconnection networks

Javier Navaridas, Jose Miguel-Alonso, Francisco Javier Ridruejo, Wolfgang Denzel
2010 Parallel Computing  
This alternative topology leaves unused upward ports on switches, which can be rearranged to be used as downward ports. The increase of locality might be efficiently exploited by applications.  ...  In this paper we evaluate an alternative tree-like topology that is cheaper in terms of cost and complexity because it uses fewer switches and links.  ...  We have selected some instances of the topologies under study, fed the simulator with the proposed workloads for a variety of message lengths, and measured their performance.  ... 
doi:10.1016/j.parco.2009.12.004 fatcat:hetmdt4luffh7niqnbfuczav5e

A 118.4GB/s multi-casting network-on-chip for real-time object recognition processor

Joo-Young Kim, Kwanho Kim, Seungjin Lee, Minsu Kim, Jinwook Oh, Hoi-Jun Yoo
2009 2009 Proceedings of ESSCIRC  
To support application-specific data transactions, the MC-NoC adopts the combination of hierarchical star and ring topology with the multi-casting capability.  ...  As a result, the proposed MC-NoC improves data transaction time and energy consumption by 20% and 23%, respectively, under target object recognition traffic.  ...  The additional ring network links for the combined topology provide a total of 25.6 GB/s data bandwidth between the local networks, and allow each PE to access the PEs in neighbor local networks in 2 switch  ... 
doi:10.1109/esscirc.2009.5325978 dblp:conf/esscirc/0001K0KOY09 fatcat:uzu5n44t4varnn2mcjf3gv3e2y

Eigenvalue Measurement of Topologically Protected Edge states in Split-Step Quantum Walks

Thomas Nitsche, Tobias Geib, Christoph Stahl, Lennart Lorz, Christopher Cedzich, Sonja Barkhofen, Reinhard F Werner, Christine Silberhorn
2019 New Journal of Physics  
We study topological phenomena of quantum walks by implementing a novel protocol that extends the range of accessible properties to the eigenvalues of the walk operator.  ...  The symmetry protected edge states are approximated with high similarities and we read-out the phase relative to a reference for all modes.  ...  The group at Hannover acknowledges support from the DFG with the SFB 1227 DQmat and from the ERC grant DQSIM.  ... 
doi:10.1088/1367-2630/ab12fa fatcat:nhfrh77tsjblfkdqvf34a2vy2y

Scaling towards kilo-core processors with asymmetric high-radix topologies

N. Abeyratne, R. Das, Qingkun Li, K. Sewell, B. Giridhar, R. G. Dreslinski, D. Blaauw, T. Mudge
2013 2013 IEEE 19th International Symposium on High Performance Computer Architecture (HPCA)  
In contrast, symmetric high-radix topologies optimize for global communication with fewer hop counts, but degrade local communication with their large, slow routers.  ...  By setting a design goal of matching router speed with wire speed, our proposed topologies use fast medium-radix routers to optimize for local communication and a few slow high-radix routers that reduce  ...  This research is supported by the National Science Foundation under the award CCF-1256203. We thank the generous support of our industrial sponsor, ARM Ltd.  ... 
doi:10.1109/hpca.2013.6522344 dblp:conf/hpca/AbeyratneDLSGDBM13 fatcat:azgwgm33qffgnekwnmqcgk264m

pp-mess-sim: a flexible and extensible simulator for evaluating multicomputer networks

J. Rexford, Wu-Chang Feng, J. Dolter, K.G. Shin
1997 IEEE Transactions on Parallel and Distributed Systems  
The simulator provides a toolbox of various network topologies, communication workloads, routing-switching algorithms, and router models.  ...  Sample simulation experiments capitalize on this flexibility to compare network architectures under various application workloads.  ...  National Science Foundation under Grant MIP-9203895.  ... 
doi:10.1109/71.569653 fatcat:u47by6qsbbhbnbfa2vs7xd5agy

Configurable topological textures in strain graded ferroelectric nanoplates

Kwang-Eun Kim, Seuri Jeong, Kanghyun Chu, Jin Hong Lee, Gi-Yeop Kim, Fei Xue, Tae Yeong Koo, Long-Qing Chen, Si-Young Choi, Ramamoorthy Ramesh, Chan-Ho Yang
2018 Nature Communications  
The total winding number of the topological texture can be configured from − 1 to 3 by selective non-local electric switching of the quadrant domains.  ...  By using angle-resolved piezoresponse force microscopy in conjunction with local winding number analysis, we directly identify the existence of vortices and anti-vortices, observe pair creation and annihilation  ...  After non-local domain switching, PFM was measured to check the switching effect. We performed non-local domain switching at each corner of the BFO nanoplate one by one in a clockwise direction.  ... 
doi:10.1038/s41467-017-02813-5 pmid:29374260 pmcid:PMC5785989 fatcat:co3h3yljp5dqtduhslzhapbdte
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