Results 91 to 100 of about 10,560,934 (248)

Active Frequency Support Control Strategy for Wind Farm Considering the Energy Discrepancy of Wind Turbines [PDF]

Dianli jianshe
[Objective] Wind turbine generators generally operate in maximum power point tracking （MPPT） mode and do not provide inertial response and frequency support to the power grid.
LI Fengneng, YANG Ping, WEI Zhichu, CHEN Wenhao, ZHOU Qianyufan, WAN Siyang
doaj   +1 more source

How cold is too cold? A theoretical analysis of the optimal trigger for index insurance for frost damage to crops

American Journal of Agricultural Economics, EarlyView.
Abstract Crop insurance is undoubtedly an extremely valuable element in protecting agricultural businesses, but in many cases standard indemnity‐based products have had very low uptake due to high transaction costs elevating premiums to unaffordable levels.
Amogh Prakasha Kumar, Laura Meriluoto, Richard Watt   +2 more
wiley   +1 more source

Climate change and perennial crop production: Evidence of yield impact and adaptation in California

American Journal of Agricultural Economics, EarlyView.
Abstract Perennial crops are economically important. They contribute to food security, providing essential nutrients that are often lacking in annual crops, and provide additional environmental benefits compared with annual crops. Despite their importance, empirical research on the impacts of climate change and adaptation on perennial crops remains ...
Yuanyuan Wen, Wei Zhang, Julian M. Alston   +2 more
wiley   +1 more source

Investigating low voltage ride through capability on wind farm by using static synchronus compensator (STATCOM) application [PDF]

, 2012
As an alternative to traditional fossil fuel extracted energy, wind energy has been acknowledged as one of the most important sources of renewable energies in the world.
Forest, Zack
core  

Distribution Strategy of Wind Farm Active Power and Its Implementation

Kongzhi Yu Xinxi Jishu, 2013
Currently, average distribution is generally adopted for the active power control instruction of wind farms. If the wind speed differs much among wind turbines in the wind farm, the output active power of the wind farm may as well differ much from the ...
HU Kaikai, ZHAI Dayong, XIA Xiangchun, CHEN Lin, XU Liwei   +4 more
doaj  

Integer programming for optimal yaw control of wind farms [PDF]

Wind Energy Science
It is well-known that wakes caused by wind turbines within a wind farm negatively impact the power generation and mechanical load of downstream turbines. This is already partially considered in the farm layout.
F. Bestehorn, F. Bestehorn, F. Bürgel, C. Kirches, S. Stiller, A. M. Tillmann, A. M. Tillmann   +6 more
doaj   +1 more source

The Herfindahl neutral point: A firm‐level threshold for managing market concentration with evidence from US hog packing

American Journal of Agricultural Economics, EarlyView.
Abstract This paper derives a firm‐level threshold, the Herfindahl Neutral Point, from the standard concentration index used in merger review. At this threshold, a marginal expansion leaves the index unchanged. Firms below the threshold reduce concentration when they expand; firms above it increase concentration.
Andrew J. Keller, Krishna P. Paudel
wiley   +1 more source

Intelligent Fault-Tolerant Active Power Control Using Reinforcement Learning for Offshore Wind Farms

IEEE Access
Given the continuous development of society and the escalating demand for clean energy, there is an imperative focus on wind farm control to overcome the primary obstacle hindering wind farm development: high operation and maintenance costs.
Xuanhe Zhang, Hamed Badihi, Saeedreza Jadidi, Ziquan Yu, Youmin Zhang   +4 more
doaj   +1 more source

Farm labor scarcity and its uneven impacts on crop producers in the United States

American Journal of Agricultural Economics, EarlyView.
Abstract This study is the first to evaluate the impacts of farm labor scarcity on producers in the United States across different crop production systems. Between 2002 and 2017, we disentangle the effects of labor scarcity from the impacts of rising commodity demand, technological change, and supply of other inputs on labor market outcomes.
Srabashi Ray, Alexandra E. Hill, Iman Haqiqi, J. Edward Taylor, Thomas W. Hertel   +4 more
wiley   +1 more source

Fast Control-Oriented Dynamic Linear Model of Wind Farm Flow and Operation

Energies, 2018
The aerodynamic interaction between wind turbines grouped in wind farms results in wake-induced power loss and fatigue loads of wind turbines. To mitigate these, wind farm control should be able to account for those interactions, typically using model ...
Jonas Kazda, Nicolaos Antonio Cutululis
doaj   +1 more source