Results 21 to 30 of about 52,727 (266)

Multi-cycle reactive voltage rolling optimization control method supporting photovoltaic absorption of regional grid

Energy Reports, 2021
To achieve reactive voltage control and resolve the problem of photovoltaic in regional grids with high-proportion photovoltaic access, a multi-cycle reactive voltage rolling optimization control method supporting photovoltaic absorption was proposed ...
Haozhe Chen, Tianhua Chen, Hui Peng, Xiaochun Xu, Xin Shan, Xian Zhang   +5 more
doaj   +1 more source

A Bi-Level Reactive Power Optimization for Wind Clusters Integrating the Power Grid While Considering the Reactive Capability

Energies
With the integration of large-scale wind power clusters into the power system, wind farms play a crucial role in grid reactive power regulation. However, the range of its reactive power remains uncertain, posing challenges in formulating a viable program
Xiping Ma, Wenxi Zhen, Rui Xu, Xiaoyang Dong, Yaxin Li   +4 more
doaj   +1 more source

Reactive Power Optimization for Distribution Network Based on Distributed Random Gradient-Free Algorithm

Energies, 2018
The increasing penetration of distributed energy resources in distribution systems has brought a number of network management and operational challenges; reactive power variation has been identified as one of the dominant effects.
Jun Xie, Chunxiang Liang, Yichen Xiao
doaj   +1 more source

Optimal Reactive Power Dispatch under Transmission and Distribution Coordination Based on an Accelerated Augmented Lagrangian Algorithm

Energies, 2022
As many distributed power sources flood into the distribution network, the relationship between transmission and distribution grids in reactive power and voltage is becoming closer and closer.
Bin Zhou, Xiaodong Shen, Caimei Pan, Yuanbao Bai, Tian Wu   +4 more
doaj   +1 more source

Study on Leveraging Wind Farm Reactive Power Potential for Uncertain Power System Reactive Power Optimization

CoRR, 2020
This paper suggests leveraging reactive power potential (RPP) embedded in wind farms to improve power system operational safety and optimality. First, three typical RPP provision approaches are analyzed and a two-stage robust linear optimization based RPP evaluation method is proposed. This approach yields an RPP range that ensures the security of wind
Yu Zhou, Zhengshuo Li
openaire   +3 more sources

Neural network‐based integrated reactive power optimization study for power grids containing large‐scale wind power

IET Generation, Transmission & Distribution
The high uncertainty of wind power output greatly affects the rapid reactive power optimization of power systems. This paper proposes a neural network‐based comprehensive reactive power optimization method for large‐scale wind power grids, effectively ...
Jie Zhao, Chenhao Wang, Biao Zhao, Xiao Du, Huaixun Zhang, Lei Shang   +5 more
doaj   +1 more source

Optimal Reactive Power Dispatch in Electric Transmission Systems Using the Multi-Agent Model with Volt-VAR Control

Energies, 2023
The optimal dispatch of reactive power is a fundamental task in the operational planning of electrical power systems. This task aims to minimize active power losses and improve voltage levels within the electrical power system.
Alex Chamba, Carlos Barrera-Singaña, Hugo Arcos   +2 more
doaj   +1 more source

Comparative Evaluation of Hemodiafiltration, Hemoperfusion, and Standard Hemodialysis on Efficacy, Inflammatory Control, Dialysis Adequacy, and Safety in End‐Stage Renal Disease: A Prospective Observational Study

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Background Chronic micro‐inflammation in patients with end‐stage renal disease (ESRD) is a significant driver of cardiovascular complications and diminished quality of life. While standard hemodialysis (SHD) effectively manages small‐molecule clearance, its ability to remove medium‐to‐large uremic toxins—the primary catalysts of systemic ...
Hongwei Zuo, Weisi Dai, Jie Mao, Mei Ye, Xingshan Lu, Xiaocui Zhang   +5 more
wiley   +1 more source

Research on Reactive Power Margin Optimization of Doubly-Fed Induction Generator Wind Farms Based on Improved Proximal Policy Optimization Algorithm

发电技术
ObjectivesTo mitigate voltage fluctuations at the grid-connected points of doubly-fed induction generator wind farms while enhancing their reactive power margin, thereby strengthening their transient voltage support capability, a reactive power margin ...
YU Da, WU Zhitao, CHEN Ziwen, LIN Xu, WANG Weihua, LIU Chongru   +5 more
doaj   +1 more source

Reconstructing enzyme evolution by protein engineering

FEBS Letters, EarlyView.
Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler, Markus R. Busch, Reinhard Sterner   +2 more
wiley   +1 more source