Filters








4,952 Hits in 8.3 sec

Probabilistic Modeling and Simulation of Transmission Line Temperatures under Fluctuating Power Flows [article]

Markus Schläpfer, Pierluigi Mancarella
2014 arXiv   pre-print
This paper presents a probabilistic modeling and simulation methodology for estimating the occurrence of critical line temperatures in the presence of fluctuating power flows.  ...  A case study performed on a single line model provides fundamental insights into the probability of hitting critical line temperatures under given power flow fluctuations.  ...  ACKNOWLEDGMENT The authors would like to thank Göran Andersson (Power Systems Laboratory, ETH Zurich), Walter Sattinger (swissgrid AG) and José Villén Altamirano (Universidad Politécnica de Madrid) for  ... 
arXiv:1411.4315v1 fatcat:uhxdf3jmpjcqtpubfvn5fwawza

Stochastic Model for Power Grid Dynamics [article]

Marian Anghel, Kenneth A. Werley, Adilson E. Motter
2006 arXiv   pre-print
We introduce a stochastic model that describes the quasi-static dynamics of an electric transmission network under perturbations introduced by random load fluctuations, random removing of system components  ...  We use a linear approximation to the network flow equations and apply linear programming techniques that optimize the dispatching of generators and loads in order to eliminate the network overloads associated  ...  Part of this work was carried out under the auspices of the National Nuclear Security Administration of the U.S. Department of Energy at Los Alamos National Laboratory under Contract No.  ... 
arXiv:physics/0609217v1 fatcat:zhbixpdfxzho7jcxh7ro3ijiim

Stochastic Model for Power Grid Dynamics

Marian Anghel, Kenneth Werley, Adilson Motter
2007 2007 40th Annual Hawaii International Conference on System Sciences (HICSS'07)  
We introduce a stochastic model that describes the quasistatic dynamics of an electric transmission network under perturbations introduced by random load fluctuations, random removing of system components  ...  from service, random repair times for the failed components, and random response times to implement optimal system corrections for removing line overloads in a damaged or stressed transmission network  ...  Part of this work was carried out under the auspices of the National Nuclear Security Administration of the U.S. Department of Energy at Los Alamos National Laboratory under Contract No.  ... 
doi:10.1109/hicss.2007.500 dblp:conf/hicss/AnghelWM07 fatcat:75zloaat7bdoxeaiqkpowck3bm

Probabilistic Approaches to the Security Analysis of Smart Grid with High Wind Penetration: The Case of Jeju Island's Power Grids

Sunoh Kim, Jin Hur
2020 Energies  
For the probabilistic approach, Monte-Carlo simulation is used in the modeling method.  ...  In this paper, we analyze various characteristics of wind power generation, and then we propose a probabilistic power output modeling method to consider the uncertainty of wind power generation.  ...  Acknowledgments: This work was supported by Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government (MOTIE) (2019371010006B, Development of core stabilizing  ... 
doi:10.3390/en13215785 fatcat:e676xkdebbdgzbsshgkvwcucky

A stochastic framework for uncertainty analysis in electric power transmission systems with wind generation

G. Sansavini, R. Piccinelli, L.R. Golea, E. Zio
2014 Renewable Energy  
Fig. 1 shows the dynamics of the power flows (thin curve) and temperatures (thick curve) for one transmission lines during the simulated operations of a power grid.  ...  Line temperature model and overloaded-line failure In order to model the failure of transmission lines due to loading beyond the rated transmission capacity, the problem of heat conduction is analyzed  ... 
doi:10.1016/j.renene.2013.11.002 fatcat:dtngvnpiofeorc2g6rv2gt7l6u

Exploitation of uncertain weather forecast data in power network management**This work was supported by CREST, JST

Y. Tomisawa, K. Ohki, H. Sugihara, K. Kashima, Y. Ohta
2016 IFAC-PapersOnLine  
The effectiveness of the proposed control scheme is examined through numerical simulation of power grids under the area dependent uncertainty and transmission line failure.  ...  The effectiveness of the proposed control scheme is examined through numerical simulation of power grids under the area dependent uncertainty and transmission line failure.  ...  The dynamics of the line temperatures is driven by the power flow fluctuations and meteorological conditions.  ... 
doi:10.1016/j.ifacol.2016.10.377 fatcat:5ojbi6xtrnh3pez3f4rkj3exsi

Solar PV Grid Power Flow Analysis

Qais Alsafasfeh, Omar Saraereh, Imran Khan, Sunghwan Kim
2019 Sustainability  
The results indicate that the fluctuations and limit violation probabilities of the power system voltage and load flow increase with the addition of the PV capacity.  ...  As the unconstrained integration of distributed photovoltaic (PV) power into a power grid will cause changes in the power flow of the distribution network, voltage deviation, voltage fluctuation, and so  ...  Author Contributions: All of the authors contributed equally to this work. Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/su11061744 fatcat:ggc6ub2zbfaq3eqgb7cfcatjzu

Probabilistic total transfer capability analysis based on static voltage stability region integrated with a modified distributed-level nodal-loading model

Dan Wang, Yue Zhou, HongJie Jia, ChengShan Wang, Ning Lu, MengHua Fan
2015 Science China Technological Sciences  
model the probability density functions (PDF) of the feeder-head load data through a Monte-Carlo simulation.  ...  The uncertainty of the nodal loading model is determined based on the feeder-head load data, which is computed using a probabilistic three-phase load flow (PTPLF) considering residential load aggregation  ...  ACKNOWLEDGMENTS The authors would like to thank the Pacific Northwest National Laboratory, and David Chassin in particular, for their extensive support in using GridLAB-D.  ... 
doi:10.1007/s11431-015-5964-3 fatcat:mdvou6ywwvdozooghe65wqvpxe

Probabilistic Capacity Assessment of Lattice Transmission Towers Under Strong Wind

Wei Zhang, Jin Zhu, Huijuan Liu, Huawei Niu
2015 Frontiers in Built Environment  
The wind profile is generated and the wind time histories are simulated as a summation of time-varying mean and fluctuating components.  ...  As the transmission tower serves as the key nodes for the power network, the probabilistic capacity curves can be incorporated into the performance-based design of the power transmission network.  ...  key component of the lifeline infrastructure system, electrical transmission networks, and distribution systems including transmission towers and lines are under a complex set of multiple threats from  ... 
doi:10.3389/fbuil.2015.00020 fatcat:owszyizbffhuvinhnmh6vz3pb4

Modeling and Simulating Long-Timescale Cascading Faults in Power Systems Caused by Line-Galloping Events

Lizheng Chen, Hengxu Zhang, Changgang Li, Huadong Sun
2017 Energies  
With the increasing occurrence of extreme weather events, the short circuit and line-breaking faults in transmission lines caused by line galloping have been threatening the security operation of power  ...  The interaction mechanism between power system operation states and line galloping processes is revealed and simulated by the solution of differences of timescales and parameters.  ...  Under appropriate temperature and precipitation, ice accumulates on transmission lines and turns into oval ice accretion, which is easy to trigger line-galloping events.  ... 
doi:10.3390/en10091301 fatcat:rysd33tlofd6hmspjtr3jc3bdy

Evaluation Method for Real-Time Dynamic Line Ratings Based on Line Current Variation Model for Representing Forecast Error of Intermittent Renewable Generation

Hideharu Sugihara, Tsuyoshi Funaki, Nobuyuki Yamaguchi
2017 Energies  
Simulation Model for Line Temperature Steady-State Model Conventionally, the rated current (continuously allowable current limit) is determined based on the steady-state conditions of line current and  ...  Due the high penetration of intermittent renewable energy sources (IRESs), transmission line currents show large fluctuations and thus significant uncertainty.  ...  wrote the paper; Hideharu Sugihara, Nobuyuki Yamaguchi, and Tsuyoshi Funaki discussed the simulation results and made the paper modification.  ... 
doi:10.3390/en10040503 fatcat:dbjieffhcjfanepiufxwshxiuu

Impact of Rooftop Photovoltaics on the Distribution System

Kamel A. Alboaouh, Salman Mohagheghi
2020 Journal of Renewable Energy  
This includes how rooftop PVs affect voltage quality, power losses, and the operation of other voltage-regulating devices in the system.  ...  It has been widely believed that high penetration levels of PVs in the distribution grid can potentially cause problems for node voltages or overhead line flows.  ...  Power Flow through the Lines. When PVs operate under a unity power factor, the active power flowing through the lines would be correlated with the PV penetration level.  ... 
doi:10.1155/2020/4831434 fatcat:xg4zdyjkvbehncg5oqwexggtuq

Probabilistic Steady-State Operation and Interaction Analysis of Integrated Electricity, Gas and Heating Systems

Lun Yang, Xia Zhao, Xinyi Li, Wei Yan
2018 Energies  
Chen et al. [20, 21] presented a probabilistic power and gas flow model considering uncertainties in wind speeds and electricity/gas/heat loads, and then solved the problem by Monte Carlo simulation (MCS  ...  It is therefore logical and desirable to extend the probabilistic power flow technique to the multi-energy flow analysis of IES.  ...  Author Contributions: All authors have worked on this paper and all authors have read and approved the final paper. Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/en11040917 fatcat:z4w5dzbk2bgvjpdujhurydeeje

Power Flow Control Approach to Power Systems with Embedded Facts Devices

Y. Xiao, Y. H. Song, Y. Z. Sun
2002 IEEE Power Engineering Review  
The performance of the proposed PSO-based PSS (PSOPSS) under different disturbances, loading conditions, and system configurations is tested and examined for different multimachine power systems.  ...  Eigenvalue analysis and nonlinear simulation results show the effectiveness of the proposed PSOPSSs to damp out the local as well as the interarea modes of oscillations and work effectively over a wide  ...  Based on a power injection model of FACTS devices and an optimal power flow model, a novel versatile power flow control approach is formulated, which is capable of implementing power flow control incorporating  ... 
doi:10.1109/mper.2002.4312379 fatcat:md6w72jpunaynn4nqtdgl5prvq

2018 Index IEEE Transactions on Power Delivery Vol. 33

2018 IEEE Transactions on Power Delivery  
., and Guo  ...  Multi-Scale and Frequency-Dependent Modeling of Electric Power Transmission Lines.  ...  ., +, TPWRD Aug. 2018 1885-1894 Efficient Simulation of Temperature Evolution of Overhead Transmission Lines Based on Analytical Solution and NWP.  ... 
doi:10.1109/tpwrd.2018.2890521 fatcat:cdqlm4aaz5gwvisqhjcnkh66i4
« Previous Showing results 1 — 15 out of 4,952 results