Metal spinning as a kind of manufacturing process has capability to shape hollow components. In present work shear spinning process is used to formplates into conical shapes. Moreover, the aim of this research is to demonstrate the impact of the process parameters (i.e. feeding rate and spindle speed) on wall thickness. This approachwas done by experimental and finite elements method. The resul...

The dynamics of power system blackouts and the associated Self-Organized Criticality (SOC) behavior is a subject that receives continuous attention in view of its inherent complexity and relevant consequences. Within this context, the paper focuses on the short-term dynamic and, more specifically, aims at studying the role of the spinning reserve and frequency control on the blackout mechanism....

2 Liquidity as a resource 5 2.1 Lower truncated liquidity process . . . . . . . . . . . . . . . . . . 5 2.2 On reserve requirements . . . . . . . . . . . . . . . . . . . . . . . 7 2.3 Liquidity cost minimization . . . . . . . . . . . . . . . . . . . . . 7 2.4 Approximation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.5 Traffic burstiness . . . . . . . . . . . . . . . . . . . . . ...

The Korean government has declared the goal of net-zero-carbon emissions with a focus on renewable energy expansion. However, high proportion baseload generators and an increasing variable (VRE) may cause problems in power system operation owing to low cycling capability variability VRE. To maintain reliability, is planning construct pumped-storage hydropower (PSH) plants, which can provide fle...

In recent years, incremental rate of electrical demands made many challenges for policy makers of power systems. Besides, due to economic crisis and environmental concerns about the air pollution, the new investments in thermal power generation units have experienced a noticeable reduction. For this reason, the power system operators should propose novel approaches to make a balance between inc...

Aiming at the problem that current dynamic economic dispatch (DED) fails to consider response risk of spinning reserve caused by fluctuation and uncertainty wind power, we work out a DED considering time-coupling while stochasticity variability arising from RESs are taken into consideration. The developed framwork unified forced shutdown unit time coupling. expected customer interruption cost (...

Natural reserves are of great environmental importance as well being an economic and social resource, their sites distinguished a unique geographical area, those with biodiversity, or other matters. Countries enact laws, regulations, legislation regarding these nature to protect them from deterioration, abuse, over-exploitation natural resources. From here began the research problem represented...