Results 231 to 240 of about 330,060 (260)

A Linear Model for AC Power Flow Analysis in Distribution Networks

IEEE Systems Journal, 2019
The standard power flow (PF) equations are nonlinear, and their integration in the optimal PF (OPF) problem leads to a nonconvex hard-to-solve model. To attack the issue, this paper presents a linear PF model wherein real and imaginary parts of nodal voltages are variables.
Gharebaghi, Sina, Safdarian, Amir, Lehtonen, Matti   +3 more
openaire   +1 more source

A linear programming approach to distribution Power Flow

2017 6th International Conference on Clean Electrical Power (ICCEP), 2017
The modern Distribution Systems (DS) require for accurate and fast Power Flow (PF) algorithms as a basis for other DS applications. Almost all decisions are taken based on accurate PF results and, possibly, they have to be taken in real time. In this paper, a new PF algorithm based on a linear programming approach is proposed.
MARINI, ABBAS, Piegari, L., Mortazavi, S. S., Ghazizadeh, M. S.   +3 more
openaire   +2 more sources

Measurement-based Optimal Power Flow with Linear Power-flow Constraint for DER Dispatch

2019 North American Power Symposium (NAPS), 2019
This paper proposes a measurement-based method to obtain optimal power-flow (OPF) solutions that optimize distribution-system operations by dispatching active- and reactive-power outputs of distributed energy resources (DERs). Central to the proposed method is the estimation of a linear power-flow model from synchronized voltage and power-injection ...
Severin Nowak, Liwei Wang, Yu Christine Chen   +2 more
openaire   +1 more source

Fast power system analysis via implicit linearization of the power flow manifold

2015 53rd Annual Allerton Conference on Communication, Control, and Computing (Allerton), 2015
In this paper, we consider the manifold that describes all feasible power flows in a power system as an implicit algebraic relation between nodal voltages (in polar coordinates) and nodal power injections (in rectangular coordinates). We derive the best linear approximant of such a relation around a generic solution of the power flow equations.
Saverio Bolognani, Florian Dörfler
openaire   +1 more source

A frequency- domain inequality for stochastic power flow in linear networks

IEEE Transactions on Circuits and Systems, 1984
This paper addresses the frequency-domain characterization of stochastic signals in linear time-invariant distributed networks. A new general relation is derived. The average power flow at each frequency from one source to another through a lossless coupling network is shown to obey an inequality related to the second law of thermodynamics. The sources
Wyatt, John L. jun., Siebert, William M., Tan, Han-Ngee   +2 more
openaire   +2 more sources

Film flow for power-law fluids: Modeling and linear stability

European Journal of Mechanics - B/Fluids, 2012
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Amaouche, Mustapha, Djema, Amar, Abderrahmane, Hamid Ait   +2 more
openaire   +2 more sources

Wave propagation in linearized shallow flows of power-law fluids

Advances in Water Resources, 2018
Abstract A depth-averaged model with a power-law rheology, usually adopted for debris flow of fine sediment-water mixtures, is analytically studied, considering the complete (Full Dynamic Model) and the simplified momentum equations, known as Kinematic, Diffusion, and Quasi-steady Models.
Di Cristo, Cristiana, Iervolino, Michele, Vacca, Andrea   +2 more
openaire   +2 more sources

Conservative linear line flow constraints for AC optimal power flow

2017 IEEE Manchester PowerTech, 2017
The AC optimal power flow problem is a non-convex optimization problem that is difficult to solve quickly and reliably for large-scale grids. To enable the application of efficient and robust solution algorithms, various linear approximations of the nonlinear system model are used.
Dmitry Shchetinin, Tomas Tinoco De Rubira, Gabriela Hug   +2 more
openaire   +1 more source

A Linear Probabilistic Optimal Power Flow Model with Linearization Error Checking

2022 IEEE PES Innovative Smart Grid Technologies - Asia (ISGT Asia), 2022
Zhentong Shao, Qiaozhu Zhai, Yan Xu, Xiaohong Guan   +3 more
openaire   +1 more source

A Feedback Linearization Based Unified Power Flow Controller Internal Controller for Power Flow Control

Electric Power Components and Systems, 2012
Abstract This article presents a feedback linearization based controller design methodology for a unified power flow controller to achieve rapid reference signal tracking in the internal control level. Feedback linearization is a non-linear control technique based on the differential geometry theory and overcomes the drawback of traditional linear ...
Keyou Wang, Bo Yan, Mariesa L. Crow, Deqiang Gan   +3 more
openaire   +1 more source