Results 71 to 80 of about 22,752,118 (291)
New Phase-lock Method for Tracking Low-voltage Ride-through on Photovoltaic Inverters
, 2018 : The low-voltage ride-through in photovoltaic power generation is a key problem for photovoltaic inverters connected to grid. Aiming at the frequency- and phase-locking of low-voltage ride-through on the photovoltaic inverter during asymmetric fault ...
Zhang, Yanxiao, Li, Shouzhi, Li, Bobo
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Risk management externalities in agrifood supply chains
American Journal of Agricultural Economics, EarlyView.Abstract Firms may under‐ or over‐invest in risk management from the social planner's perspective, resulting in a negative externality on other economic agents in the supply chain. The externality of risk management is particularly relevant for agrifood supply chains, which frequently experience disruptions and play a primary role in preventing major ...
Jeffrey Hadachek, Meilin Ma
wiley +1 more source
Income sharing for common pool resources with uncertain productivity
American Journal of Agricultural Economics, EarlyView.Abstract We address the interconnected issues of externalities in the use of a natural common‐pool resource system and adverse effects of environmental uncertainty on risk‐averse resource users. We set up a simple analytical model and derive conditions such that insurance by means of an income sharing mechanism mitigates externalities and hence ...
Claudia Kelsall +2 more
wiley +1 more source
电力工程技术The offshore wind power via flexible low-frequency transmission (FLFT) system based on the modular multilevel matrix converter (M3C) faces power surplus and stability risks following faults on the power frequency grid side.
Nianwen XIANG +5 more
doaj +1 more source
EnergiesIn practical engineering, large-scale wind power integration typically requires long-distance transmission lines to deliver power to load centers. The resulting weak sending-end systems lack support from synchronous power sources.
Yunpeng Wang +5 more
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Australian Journal of Social Issues, EarlyView.ABSTRACT In Australia, governments fund Community Legal Centres (CLCs) as part of the legal assistance sector (LAS) to meet the ‘legal needs’ of people experiencing disadvantage who cannot afford private legal services. Persistent unmet demand for CLCs is well‐documented. As artificial intelligence (AI) is increasingly used in private legal practice to
Catherine Hastings +2 more
wiley +1 more source
Low Voltage Ride-through in DFIG Wind Generators by Controlling the Rotor Current without Crowbars
Energies, 2014 Among all the different types of electric wind generators, those that are based on doubly fed induction generators, or DFIG technology, are the most vulnerable to grid faults such as voltage sags.
Jaime Rodríguez Arribas +3 more
doaj +1 more source
Control of Brushless Doubly-Fed Reluctance Machines under Normal and Faulty Operating Conditions [PDF]
The brushless doubly fed reluctance machine (BDFRM) is an attractive alternative technology to traditional slip-ring doubly fed induction machine (DFIM) for slip-power recovery applications with limited variable speed ranges such as wind turbines or pump-
Hasan, Mohammed
core
, 2022 7 S.Faults in medium and high voltage grids lead to voltage sags in the low voltage level. Due to the voltage dip, distributed generators disconnect from the low voltage grid.
Heß, T. +4 more
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Simulation Research of Low-voltage Ride Through Technology of Direct Drive Type Wind Power System
Gong-kuang zidonghua, 2011 The paper gave topological structure of permanent magnet direct drive type wind power system, analyzed working principle and topological structure of DC unloading circuit, established model of permanent magnet wind power system, and constructed ...
HAN Guo-qing
doaj