Assessment of transmission outage Contingencies' effects on bidding strategies of electricity suppliers
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
Authors: MollahassaniPour, Mojgan; Taheri, Iman; Marzooni, Masoud Hasani
Abstract
This paper presents a solution concept for quantifying effect of transmission outage contingencies on wholesale electricity markets. For this purpose, an equilibrium-based model is employed to investigate the optimal bidding strategies of contingency-constrained generation companies (GENCOs). All GENCOs submit their bids to the independent system operator (ISO) in economic model of supply function equilibrium (SFE). Economic behaviour of a GENCO is formulated as a bi-level programming (BLP) problem. In the upper level, the profit of intended GENCO is maximized and in the lower level, the ISO clears the market via solving a bid-based preventive contingency constrained economic dispatch (PCCED). A constraint-reduced Primal-Dual Interior Point Method (PDIPM) is proposed to determine the optimal solution of PCCED. To ease the computation burden, a novel Contingency Filtering (CF) technique is devised to filter out non-critical contingencies. It is shown that non-critical contingencies can be identified by solving series of Linear Programming (LP) problems. Also, the non-cooperative Game Theory (GT) is utilized to determine the equilibrium of oligopolistic competition of contingency-constrained GENCOs. Finally, effect of contingency constraints on the optimal bidding strategies of GENCOs is investigated through simulation studies.
The role of trait emotional intelligence in appearance perception
INTERNATIONAL JOURNAL OF ADOLESCENCE AND YOUTH
Authors: Sanchez-Ruiz, Maria-Jose; Merhi, Rana; Nicolaou, Maya
Abstract
This paper explores the relationship between trait emotional intelligence (trait EI) and appearance perception in a Lebanese university sample (N = 201). Two indicators of appearance perception, body image dissatisfaction (BID) and physical attractiveness (PAT), were investigated in relation to trait EI and depression. Global trait EI and the well-being and self-control factors negatively correlated with BID, while global trait EI and all four factors positively correlated with PAT. In addition, the well-being trait EI factor was a significant predictor of BID and PAT (marginal) over BMI, emotion regulation, and self-worth. These variables jointly predicted 38% of the variance in BID and 41% of the variance in PAT. Moderation analyses showed that global trait EI moderated the relationship between the appearance perception indicators and depressive symptomatology. The role of trait EI in attenuating the psychological impact associated with a negative appearance perception is discussed in relation to its clinical utility.