This paper presents an optimization procedure that enables the optimal dispatching of distributed generators and storage systems in a medium-voltage islanded microgrid. The network is assumed to be supplied by programmable (dispatchable) nonprogrammable (i.e. nondispatchable, such as renewable energy sources-based units). goal minimize overall microgrid operating cost pollutants emission generators, assuming all power made available (photovoltaic wind systems) either directly injected into...

This paper presents an innovative generalized systematic approach and related analytical formulation to evaluate distribution system reliability in smart grids where islanded operation of microgrids helps improve local overall reliability. In order do this, the involves adequacy calculation conventional renewable distributed generators supplying by using probabilistic models. Adequacy is computed means a new general expression which takes into account load shedding (user disconnection)...

This paper describes a method to apply generalized systematic approach, useful identify the faults' effect on load points' reliability accounting for intentional islanding, with either random or sequential Monte Carlo simulation (RMCS, SMCS) in order assess distribution system smart grids. Moreover, simple RMCS based an annual branch fault probability, which correlates frequency, is described as well. A study case presented validate results (in terms of expected indices) proposed comparison...

Disruption of the ground communication infrastructure in emergency scenarios makes post-disaster rescue operations very complicate. This paper proposes to use edge intelligence support operators managing these scenarios. A set Unmanned Aerial Vehicles (UAV), organized as Flying Ad-Hoc network (FANET), autonomously takeoff and land provide with computing services. charging station for batteries is supplied by a renewable-energy generator. The FANET Controller applies model-based Reinforcement...

Telecontrol of distribution switching devices is recognized as a major means for reducing interruption duration after fault occurrence in modern systems, since it allows one to isolate the faulted sections and restore healthy ones quickly possible. In order reduce frequency well, necessary increase number series automatic circuit breakers. Further benefits terms service continuity improvement can be obtained by allowing islanded operation relatively small portions network (microgrids)...

The hybrid FEM-DBCI numerical method is proposed for the computation of coupling factors between time-harmonic magnetic fields and human bodies. Characteristics are highlighted which make very suitable to perform such computations. Several coil geometries considered (circular coils) at low frequency. A simplified model body assumed as suggested by IEC standards. Details highlighted, results also provided.

This paper presents a novel technique for controlling the Power Factor Correction (PFC) of two-stage converter. The proposed solution operates PFC in special intermittent mode at medium or light load. As result, flyback converter stage can be optimized to operate within tight input voltage range, thus obtaining better efficiency and more compactness compared traditionally controlled Circuit models have been developed test goodness solution.

In the last years, Internet is evolving towards cloud-computing paradigm complemented by fog-computing in order to distribute computing, storage, control, networking resources, and services close end-user devices as much possible, while sending heavy jobs remote cloud. When nodes cannot be powered main electric grid, some environmental-friendly solutions, such use of solaror wind-based generators could adopted. Their relatively unpredictable power output makes it necessary include an energy...

Drone market is in the infancy stage although it rapidly growing last years. In next future, drones will be largely adopted traditional economy sectors as well for supporting emerging technologies. The main application problem limited flying range and, consequently, need of performing many battery recharges during time interval a drone performs its task. large diffusion recharging stations key factor view persistent operation without humans' intervention. This scenario leads promising...

Condition monitoring (CM) of power semiconductor devices enhances converter reliability and customer service. Many studies have investigated the failure modes, sensor technologies, signal processing techniques to optimize CM. Furthermore, improvement devices’ CM thanks use Internet Things artificial intelligence technologies is rising in smart grids, transportation electrification, so on. These will be widespread future, where more sensors enable a better estimation state health (SOH)...

Vehicle electrification and digitalization are even more increasingly pushed by several aims, such as the improvement in sustainability, wellness, safety, reliability. The need for onboard power electronics is a common factor different types of electric vehicles. Similarly, increasing presence Internet Things items well systems implementing artificial intelligence asks additional that ensure supplying them according to their rating plate. Additionally, converters have perform this task also...

This work presents a step-by-step procedure to estimate the lifetime of discrete SiC power MOSFETs equipping three-phase inverters electric drives. The stress each device when it is subjected thermal jumps from few degrees up about 80 °C was analyzed, starting computation average losses and commitment drive. A customizable mission profile considered where, by accounting working conditions drive, corresponding junction temperatures composing inverter can be computed. tool exploits...

Gallium nitride high-electron-mobility transistor (GaN HEMT) is a key enabling technology for obtaining high-efficient and compact power electronic systems. At the design stage of converter, proper modelling GaN HEMT essential to benefit from their good features account limits current technology. Circuit models MOSFETs have been deeply investigated by academia industry long time. These are able emulate datasheet information, they usually provided device manufacturers as netlists that can be...

This paper deals with the performance evaluation of enhanced MOSFET based on a trench gate layout in full- bridge DC-DC power converter synchronous rectifiers for telecom supply applications. Outlines switches design needs both primary and secondary side insulated full-bridge are treated. In particular, rectifier MOSFETs selection criteria highlighted. Main focus is minimization devices losses contribution order to improve efficiency. Furthermore, an extended characterization advanced static...

Smart agriculture, representing one of the use cases for Industry 4.0, encounters some deployment problems in wide rural areas where neither telecommunications infrastructure, nor a local power grid is available. For this reason, paper proposes comprehensive platform constituted by Flying Ad hoc NETwork (FANET) to provide connectivity, and 5G network access node equipped with MEC facilities run software applications at edge network. Power supply base station, drones be periodically recharged...

This paper investigates the behavior of SiC MOSFETs body diode reverse recovery as a function different operating conditions. The knowledge their effects is crucial to properly designing and driving power converters based on devices, in order optimize commutations aiming at improving efficiency. Indeed, part switching transient, but it has significant role due its impact energy charge. set conditions been chosen prevent or force snappy device under testing. experimental results specific...

The possibility to operate in islanding mode some portions of a distribution network, after fault occurrence, helps improve system reliability. In this perspective, it is crucial estimate the ability distributed generators (DGs) meet local load. A major issue adequacy assessment take into account correlation existing among power outputs DGs based on same renewable intermittent primary energy source (sun, wind). This paper presents new modelling approach provide hourly generation models for...

In multi‐ and many‐objective optimization problems, the target is to obtain a set of non‐dominated solutions close Pareto‐optimal front, well‐distributed, maximally extended fully filled. Comparing solution sets crucial in evaluating performance different algorithms. The use indicators common comparing those and, subsequently, Therefore, an effective indicator must encompass these features as whole above all, it be Pareto dominance compliant. Unfortunately, some known often fail properly...

Power electronics is becoming pervasive in electricity-based applications, making power device reliability an increasingly important topic. Maintenance operations are necessary to ensure the functioning of electronic apparatuses <xref ref-type="bibr" rid="ref1">[1]</xref>. Guessing time for maintenance challenging due related tradeoff between costs and improvements. Lifetime prediction techniques condition monitoring methods (CMMs) useful tools determining actual need rid="ref2">[2]</xref>.