Results 81 to 90 of about 9,774 (207)

Solution of Optimal Power Flow Problems using Moment Relaxations Augmented with Objective Function Penalization

open access: yes, 2015
The optimal power flow (OPF) problem minimizes the operating cost of an electric power system. Applications of convex relaxation techniques to the non-convex OPF problem have been of recent interest, including work using the Lasserre hierarchy of "moment"
Hiskens, Ian A.   +3 more
core   +1 more source

Admittance‑Based Two‑Stage Optimisation of GFM‑STATCOM Parameters for Transient Voltage Support in DFIG Wind Farms

open access: yesIET Generation, Transmission &Distribution, Volume 20, Issue 1, January/December 2026.
This paper builds an admittance model for a DFIG‐STATCOM parallel system. Based on the system, the paper provides a method to optimise the control of the STATCOM, which aims to increase the performance of the system during symmetrical faults .
Wenhao Du   +5 more
wiley   +1 more source

Improving QC Relaxations of OPF Problems via Voltage Magnitude Difference Constraints and Envelopes for Trilinear Monomials

open access: yes, 2018
AC optimal power flow (AC~OPF) is a challenging non-convex optimization problem that plays a crucial role in power system operation and control. Recently developed convex relaxation techniques provide new insights regarding the global optimality of AC ...
Crow, Mariesa L.   +2 more
core   +1 more source

An Optimization Method for Solving Three‐Phase Unbalance and Vehicle‐to‐Grid Reactive Power Compensation Utilizing Three‐Phase Inverter Control

open access: yesIET Intelligent Transport Systems, Volume 20, Issue 1, January/December 2026.
1. Using an operating power factor control method based on the instantaneous power theory to regulate voltage. 2. Designing the three‐phase four‐wire inverter s control strategy to effectively solve the three‐phase unbalanced operation problem. 3. Quantifying the regulation ability of electric vehicles as a reactive power compensation resource in the ...
Yin Yi   +5 more
wiley   +1 more source

Deep Neural Network-Based Optimal Power Flow for Active Distribution Systems with High Photovoltaic Penetration

open access: yesEnergies
The integration of photovoltaic (PV) generation into distribution systems supports decarbonization and cost reduction but introduces challenges for secure and efficient operation due to voltage fluctuations and power flow variability.
Peng Y. Lak, Jin-Woo Lim, Soon-Ryul Nam
doaj   +1 more source

Matrix Minor Reformulation and SOCP-based Spatial Branch-and-Cut Method for the AC Optimal Power Flow Problem

open access: yes, 2017
Alternating current optimal power flow (AC OPF) is one of the most fundamental optimization problems in electrical power systems. It can be formulated as a semidefinite program (SDP) with rank constraints.
Dey, Santanu S.   +2 more
core   +1 more source

Mean‐Guided Elite Selection Genetic Algorithm for Multi‐Objective Optimization of Operational Costs and Voltage Control in Grid‐Connected Microgrids

open access: yesIET Renewable Power Generation, Volume 20, Issue 1, January/December 2026.
This paper proposes a mean‐guided elite selection genetic algorithm (MGES‐GA) for bi‐objective optimisation of grid‐connected microgrids, minimising both operational costs and voltage deviation. MGES‐GA improves the selection process by considering both high‐performing and low‐performing individuals to balance exploration and exploitation.
Natasha Dimishkovska Krsteski   +1 more
wiley   +1 more source

From Electrical Power Flows to Unsplittabe Flows: A QPTAS for OPF with Discrete Demands in Line Distribution Networks

open access: yes, 2017
The {\it AC Optimal Power Flow} (OPF) problem is a fundamental problem in power systems engineering which has been known for decades. It is a notoriously hard problem due mainly to two reasons: (1) non-convexity of the power flow constraints and (2) the (
Chau, Chi-Kin   +2 more
core  

Distributed Optimal Power Flow Algorithm for Radial Networks, I: Balanced Single Phase Case [PDF]

open access: yes, 2018
The optimal power flow (OPF) problem determines a network operating point that minimizes a certain objective such as generation cost or power loss. Traditionally, OPF is solved in a centralized manner.
Low, Steven H., Peng, Qiuyu
core  

Hierarchical Control Framework for Stable Operation in Inverter‐Dominated Multi‐Microgrid Systems via Adaptive Consensus Tuning

open access: yesIET Renewable Power Generation, Volume 20, Issue 1, January/December 2026.
This paper proposes a hierarchical control strategy for inverter‐dominated multi‐microgrid systems that partitions control into a decentralised microgrid layer and a multi‐microgrid layer where consensus coefficients are adaptively tuned to enhance system stability.
Masood Sorouri   +3 more
wiley   +1 more source

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