Results 71 to 80 of about 698 (139)

An improved affinity propagation method for maximising system sum rate and minimising interference for 3D multi‐UAV placement in disaster area

IET Networks, Volume 14, Issue 1, January/December 2025.
In emergency situations where ground base stations are disabled, UAVs, due to their low cost and high adaptability, restore communication coverage in remote areas. The main challenge is optimally determining the three‐dimensional positions of the UAVs to meet dynamic user demand and reduce interference.
Nooshin Boroumand Jazi, Farhad Faghani, Mahmoud Daneshvar Farzanegan   +2 more
wiley   +1 more source

A decentralized optimization framework for multi-MGs in distribution network considering parallel architecture

International Journal of Electrical Power & Energy Systems
In view of centralized optimization facing the shortcomings of heavy communication burden, poor privacy, lack of autonomy or susceptibility to communication failures, a decentralized optimization framework is proposed to apply in parallel architecture ...
Dengyin Jiang, Xiaoqian Zhou, Qian Ai, Yuanjun Hou, Yuan Zhao   +4 more
doaj   +1 more source

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

, 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., Molzahn, Daniel K., Narimani, Mohammad Rasoul   +2 more
core   +1 more source

Active and reactive power coordinated optimization of active distribution networks considering dynamic reconfiguration and SOP

IET Renewable Power Generation, Volume 19, Issue 1, January/December 2025.
In this paper, a day‐ahead active and reactive power coordinated optimization strategy for active distribution networks with dynamic network reconfiguration and soft open point is proposed. The distribution system operation economy and voltage quality have been improved through the coordinated optimization of network dynamic reconfiguration, soft open ...
Chen Li, Yao Dai, Peng Wang, Shiwei Xia
wiley   +1 more source

Co-optimizing location, capacity, and hourly scheduling of switchable capacitors in power distribution systems considering daily load patterns and voltage dependence

Results in Engineering
This paper introduces a two-stage optimization method for the optimal location, capacity, and hourly scheduling of switchable capacitors. Unlike existing approaches, the proposed optimization framework accounts for daily load consumption shapes and the ...
Nang-Van Pham, Xuan-Giang Phan
doaj   +1 more source

A Status Report on Conflict Analysis in Mixed Integer Nonlinear Programming

, 2019
Mixed integer nonlinear programs (MINLPs) are arguably among the hardest optimization problems, with a wide range of applications. MINLP solvers that are based on linear relaxations and spatial branching work similar as mixed integer programming (MIP ...
A Forsgren, AH Land, AH Land, B Davey, C Mészáros, GP McCormick, GR Kocis, HW Kuhn, I Quesada, J Kronqvist, J Nocedal, J Nocedal, J Viswanathan, J Witzig, JF Benders, JP Marques-Silva, L Liberti, LG Khachiyan, MA Duran, ML Ginsberg, MR Kılınç, OK Gupta, P Bonami, R Fletcher, R Horst, RE Bixby, RJ Dakin, RM Stallman, S Mehrotra, S Vigerske, SA Vavasis, T Achterberg, T Achterberg, T Achterberg, T Berthold, T Berthold, T Westerlund, Y Jiang   +37 more
core   +1 more source

Data‐driven energy sharing for multi‐microgrids with building prosumers: A hybrid learning approach

IET Renewable Power Generation, Volume 19, Issue 1, January/December 2025.
A hybrid learning approach is proposed in this study. XGBoost‐based demand response model of prosumers is first trained by supervised learning and then embedded into the MADRL environment. And an XGBoost‐embedded MADDPG algorithm is adopted to obtain the optimal scheduling strategy of MMGs with building prosumers through off‐line centralized training ...
Haonan Sun, Nian Liu, Lu Tan, Jianpei Han   +3 more
wiley   +1 more source

A resilience‐oriented restoration framework for multi‐area active distribution network following a disaster

IET Renewable Power Generation, Volume 18, Issue 16, Page 3810-3824, 7 December 2024.
Abstract A disaster disrupts energy trading between the distribution network (DN) and autonomous areas in the multi‐area active distribution network (MA‐ADN). Since these areas are self‐interested agents, the energy transaction cost between them should be considered when determining the grid restoration scheme.
Hekmat Beiranvandi, Amin Samanfar, Meysam Doostizadeh, Reza Saki   +3 more
wiley   +1 more source

Frequency-constrained dispatch for integrated power and transportation system considering frequency response from EV charging stations

International Journal of Electrical Power & Energy Systems
The increasing penetration of renewable energy threatens frequency security in future power systems, while electric vehicle charging stations (EVCSs) can provide flexible and fast frequency response (FR).
Zepeng Li, Qiuwei Wu, Hui Li, Litao Zheng, Shengyu Tao, Xuan Zhang, Jianfeng Wen   +6 more
doaj   +1 more source

A two‐stage reactive power optimization method for distribution networks based on a hybrid model and data‐driven approach

IET Renewable Power Generation, Volume 18, Issue 16, Page 3967-3979, 7 December 2024.
The two‐stage reactive power optimization framework consists of day‐ahead centralized optimization and real‐time decentralized optimization. Abstract The uncertainty of distributed energy resources (DERs) and loads in distribution networks poses challenges for reactive power optimization and control timeliness.
Ghulam Abbas, Wu Zhi, Aamir Ali
wiley   +1 more source