104,681 research outputs found
NEW APPROACHES FOR VERY SHORT-TERM STEADY-STATE ANALYSIS OF AN ELECTRICAL DISTRIBUTION SYSTEM WITH WIND FARMS
No full textDistribution networks are undergoing radical changes due to the high level of penetration of dispersed generation. Dispersed generation systems require particular attention due to their incorporation of uncertain energy sources, such as wind farms, and due to the impacts that such sources have on the planning and operation of distribution networks. In particular, the foreseeable, extensive use of wind turbine generator units in the future requires that distribution system engineers properly account for their impacts on the system. Many new technical considerations must be addressed, including protection coordination, steady-state analysis, and power quality issues. This paper deals with the very short-term, steady-state analysis of a distribution system with wind farms, for which the time horizon of interest ranges from one hour to a few hours ahead. Several wind-forecasting methods are presented in order to obtain reliable input data for the steady-state analysis. Both deterministic and probabilistic methods were considered and used in performing deterministic and probabilistic load-flow analyses. Numerical applications on a 17-bus, medium-voltage, electrical distribution system with various wind farms connected at different busbars are presented and discusse
Donne vittime di violenza: la Self-compassion come strumento metodologico e clinico di promozione dell’empowerment
No full textLa violenza contro le donne ha profonde implicazioni per la salute e la qualità della vita delle vittime, che - spesso – viene ignorato. Violen-ze gravi e/o reiterate creano nella vittima un sentimento di ansia intensa o di paura generalizzata; possono costringerla in uno stato di allerta e di tensione costante, che implica un’invasione del Sé, ma anche la distru-zione della fiducia negli altri e nel mondo, nonché sentimenti di confu-sione e di vergogna, nonostante la vittima non abbia alcuna responsabi-lità in proposito.
Il presente lavoro di ricerca si propone come spunto di riflessione empirica circa lo sviluppo di competenze specifiche di empowerment nelle donne che hanno subìto violenza.
Nello specifico, il costrutto di “empowerment” (inteso come “mette-re in grado di”, “rafforzamento”, “potenziamento”, “responsabilizza-zione” e “consapevolezza”) è il principio cardine del nostro studio, ed è inteso come il processo per il superamento e la ristrutturazione del trauma subìto dalla donna-vittima.
In un’ottica di institution building, sono state previste diverse fasi per promuovere il gender empowerment.
L’approccio metodologico è quello della Terapia Focalizzata sulla Compassione (TFC), un approccio psicoterapeutico, nato nell’ ambito delle terapie cognitivo-comportamentali della terza generazione, alla base della quale si propone l’innovativo costrutto dimensionale della Self-Compassion (Neff, 2003).
Il costrutto della Self-Compassion mira a promuovere tre abilità di base:
1) la capacità di trattarsi con gentilezza, comprensione e perdono, piuttosto che con severa auto-critica;
2) la capacità di vedere le proprie esperienze negative e i propri di-fetti come aspetti condivisi dell’esperienza umana, piuttosto che come elementi “anormali”, di separazione ed isolamento dagli altri;
3) la capacità di affrontare e contenere le proprie emozioni e pen-sieri dolorosi con consapevolezza, piuttosto che con iper-coinvolgimento ed identificazione con esse
A Heuristic Multi-objective Approach with Trade off/Risk Analysis Issues for Passive Harmonic Filters Planning I. Problem Formulation and Solution Algorithm
No full textDistribution system planners have frequently to ehoose among different solutions either in deterministic framework or under problem data uncertainty. In these conditions, adequate methods are needed to choose the optimal solution. This paper refers to electrical distribution systems with static converters and formulates the planning problem of passive filtering systems as a multi-objective optimization problem. A heuristic simplified approach including trade-off/risk analysis issues is proposed to solve the problem with the aim of optimizing several objectives and meeting proper equality and inequality constraints. The approach is able to quickly find solutions on the Pareto frontier that can help the Decision Maker in selecting the final planning alternative to be practically operated. Both deterministic and uncertain frameworks are taken into account. This paper is a companion paper to a paper of the same title, Part II |1|, in which the proposed approach is applied on a 17-busbars distribution test syste
A Heuristic Multi-objective Approach with Trade off/Risk Analysis Issues for Passive Harmonic Filters Planning II. Case Study
No full textThis is a companion to a paper of the same title, Part I [1], which deals with the theoretical aspects of the optimal allocation of passive filters in distribution electrical networks with static converters. Part I formulates the multiobjective optimization model and proposes a heuristic solution procedure based on trade-off/risk analysis. This Part II presents and discusses numerical applications of the approach proposed in Part I, in order to illustrate the implementation problems and practical applications. The numerical tests refer to a 16-node Medium Voltage distribution system and consider both deterministic and uncertain framework
Compensation of Waveform Distortions and Voltage Fluctuations of DC Arc Furnaces: the Decoupled Compensator
No full textModeling and Simulation of the Propagation of Harmonic In Electric Power Networks, Part I: Concepts, Models and Simulation Techniques
No full textDecision Theory Criteria for Medium Voltage Component Sizing in Presence of non Linear Loads
No full textLe novità introdotte dalla liberalizzazione del mercato dell’energia elettrica sulla Power Quality
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New ESPRIT-based method for an efficient assessment of waveform distortions in power systems
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