نتایج جستجو برای: operating reserve
تعداد نتایج: 186560 فیلتر نتایج به سال:
Carsharing operators, which rent out electric vehicles for minutes or hours, lose money on idle vehicles. We develop a model that allows carsharing operators to offer the storage of these vehicles on operating reserve markets (market for quickly rampable back-up power sources that replace for instance failing power plants). We consider it a dispatch and pricing problem with the tradeoff between...
The number of electric vehicles (EVs) is growing rapidly due to environmental concerns and political supports. To better coordinate the charging behaviors large numbers EVs, EV aggregator an important intermediate between electricity market EVs. This work proposes a two-stage optimal operational regime for who participates in multiple markets under uncertainties. In day-ahead stage, joint offer...
BACKGROUND Coronary flow reserve has extensive validation as a prognostic marker in coronary disease. Although pressure-only fractional flow reserve (FFR) improves outcomes compared with angiography when guiding percutaneous coronary intervention, it disagrees with coronary flow reserve classification 30% of the time. We evaluated whether baseline instantaneous wave-free ratio (iFR) could provi...
The objective of this paper is to analyse the trade-off between cost operation and system reliability resulting from different shapes Operating Reserve Demand Curves under scarcity pricing. We implement a model short-term Belgium we validate it against historical realisations operation. implemented using 4 embedded optimization problems. simulates lag mobilizing flexible resources versus increa...
Electricity-driven thermostatically controlled loads (TCLs), e.g., air conditioners (ACs), have been widely utilized in demand response (DR) to provide operating reserve for power systems. However, the rebound effects may occur during recovery process of DR, which can limit quality ACs or even affect reliable operation With community-level smart energy hubs (EH), traditional electricity-driven ...
The use of a reserve aggregate as an operating target raises questions about the interest rate effects of policy actions on the ability of the Federal Reserve to achieve a desired growth in the money stock. Open market operations affect both reserve aggregates and interest rates. Changes in interest rates, in turn, influence the portfolio decisions of banks and the public, and are believed by s...
In an electricity market, every generation company (GENCO) attempts to maximize profit according to other participants bidding behaviors and power systems operating conditions. The goal of this study is to examine the optimal bidding strategy problem for GENCOs in energy and spinning reserve markets based on a hybrid GA-heuristic optimization algorithm. The heuristic optimization algorithm used...
Department of Applied Economics and Management and School of Electrical and Computer Engineering Cornell University Abstract The two basic criteria used by the North-American Electric Reliability Council (NERC) to measure reliability are 1) “Adequacy” (to ensure that the installed capacity of the supply system is sufficient to meet projected future loads and limit the Loss of Load Expectation (...
BACKGROUND This study was designed to determine whether small diameter needles for oocyte retrieval alter oocyte yields in patients undergoing IVF in comparison to standard large diameter needles. METHODS We conducted a prospective pilot study of 21 consecutive favorable prognosis patients. In each patient one ovary was randomly allocated to retrieval with either a 20 G/ 35 mm (thin) or 17 G/...
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