Results 151 to 160 of about 1,271,468 (199)

A Data-Driven Linear Optimal Power Flow Model for Distribution Networks

IEEE Transactions on Power Systems, 2023
The linearized power flow (PF) model is mainly used to make the optimal power flow (OPF) problem convex. However, existing data-driven linear PF models are not applicable for OPF calculation since the Kirchhoff's law (KCL) constraints are neglected.
Penghua Li, Wenchuan Wu, Xiaoming Wang, Bin Xu   +3 more
semanticscholar   +1 more source

DC power flow using fuzzy linear equations

2015 IEEE Power & Energy Society General Meeting, 2015
This paper presents the application of a fuzzy DC power flow for electrical networks. The proposed methodology can be used in power system planning and day-ahead energy market. The uncertain variables in the DC power flow, renewable energy-based power generation, load and network parameters, are modeled as triangulate fuzzy variables with a center as ...
Hanif Livani, Saeed Jafarzadeh, M. Sami Fadali   +2 more
openaire   +1 more source

Data-Driven-Aided Linear Three-Phase Power Flow Model for Distribution Power Systems

IEEE Transactions on Power Systems, 2022
Distribution power systems (DPSs) are generally unbalanced, and their loads may have notable static voltage characteristics (ZIP loads). Hence, although many papers have focused on linear single-phase power flow models, it is still necessary to study ...
Yitong Liu, Zhengshuo Li, Yu Zhou
semanticscholar   +1 more source

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

Approximate Linear Power Flow Using Logarithmic Transform of Voltage Magnitudes With Reactive Power and Transmission Loss Consideration

IEEE Transactions on Power Systems, 2018
Alternating current (ac) power flow (PF) presents difficulties for power system analysis and optimization due to its nonlinearity. Progress has been made to approximately linearize ac PF in recent decades.
Zhigang Li, Jinyu Yu, Q. Wu
semanticscholar   +1 more source

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

Network-constrained unit commitment with piecewise linear AC power flow constraints

Electric power systems research, 2021
This paper presents a new network-constrained unit commitment (UC) model, which is formulated as a mixed-integer linear programming (MILP) optimization problem with embedded ac power flow (AC-PF) constraints.
S. Nanou, G. Psarros, S. Papathanassiou
semanticscholar   +1 more source

Fast Linear Power Flow Algorithm for the Study of Steady-State Performance of DC Grid

IEEE Transactions on Power Systems, 2019
As the penetration of renewable resources and direct current (dc) nature loads increase, dc grids are getting more attraction in the future smart grid architecture.
Zhichang Yuan, Yizhen Wang, Y. Yi, Chengshan Wang, Yuming Zhao, Weijie Wen   +5 more
semanticscholar   +1 more source

A Linear AC Power Flow Model for Unbalanced Multi-Phase Distribution Networks Based on Current Injection Equations

IEEE Transactions on Power Systems, 2021
A realistic and practicable modeling of unbalanced distribution networks (DNs) is the missing link in most studies undertaken in these networks, e.g., optimal power flow (OPF), energy markets, etc. To address the issue, this letter proposes an unbalanced
Adel Heidari-Akhijahani, A. Safdarian, Maria Vrakopoulou   +2 more
semanticscholar   +1 more source

Review of power system linearization methods and a decoupled linear equivalent power flow model

2018 International Conference on Electronics Technology (ICET), 2018
With the rapid development of power system, applications of classical AC power flow model are limited in the power system industry for its problems of nonlinearity, difficulty to converge and low computational efficiency, especially in large-scale systems. Thus the research of linear power flow is of great significance.
Dongli Yu, Jun Cao, Xiaoyong Li
openaire   +1 more source