Rising demand for distributed generation based on renewable energy sources (RES) has led to several issues in the operation of utility grids. The microgrid is a promising solution solve these problems. A dedicated storage system could contribute better integration RES into by smoothing resource's intermittency, improving quality injected power and enabling additional services like voltage frequency regulation. However, due energy/power technological limitations, it often necessary use hybrid...

In order to smoothly connect permanently disturbed grids, DFIG-based wind turbines must precisely synchronize the voltage induced at their open stator with that of grid. Hence, aiming addressing still unpublished task synchronizing DFIGs simultaneously unbalanced and harmonically distorted a phase-locked loop (PLL)-less naturally chatter-free sliding-mode control (SMC) algorithm is proposed. The strategies developed so far were formulated considering synchronous reference frames. However, by...

A high penetration of the Renewable Energy Sources (RES) can create stability, reliability and power quality problems in main electrical grid due to their stochastic nature. The microgrid is one analysed solutions solve this problem. In context, storage becomes necessary better harness energy generated by RES maintain proper operation microgrid. This paper addresses control bidirectional DC-DC converters used interface a parallel connected Hybrid Storage System (HESS) formed Vanadium Redox...

Microgrids can potentially improve security, quality, reliability and availability of electricity supply for many applications. In order to achieve these benefits when a microgrid with substantial amount stochastic generation operates in grid connected mode but also during islanding mode, the use storage systems is essential. The main goal perform power balance avoid effect renewable energy sources intermittency load fluctuations grid. However, none currently available Energy Storage Systems...

The increasing penetration level of the Renewable Energy Sources (RES) and their variability can compromise proper operation an electrical grid. microgrid is being analysed as a solution to obtain high RES in controlled way. Due stochastic nature RES, Storage Systems must be used maintain energy power balance between generation demand. limits storage technologies that are nowadays available make it necessary associate more than one technology creating Hybrid System (HESS) order satisfy...

In this paper, the transient operation of a Three-Level Neutral Point Clamped (3LNPC) four-leg inverter equipped with an innovative control strategy able to improve power quality in renewable energy based weak grids is investigated. The 3LNPC controlled manage Hybrid Energy Storage System order satisfy energy/power demand grid and simultaneously balance AC voltage during unbalanced 3-phase loads. proposed uses special designed offset for DC power/energy division decomposition supply...

Temperature is a determinant parameter in terms of performance, lifespan and safety working with li-ion batteries. Working above 45°C, hot climates, has direct influence the cycle life battery can cause dangerous failure if higher temperatures are reached; besides, performance batteries cold climates very poor due to high internal resistance they present under these ambient conditions. Being able predict temperature cell or distribution module for any condition without testing device...

The aim of this research study has been to design a gain scheduling (GS) digital controller in order control the voltage an islanded microgrid presence fast varying loads (FVLs), and compare it robust controller. inverter which feeds is connected through inductance-capacitor-inductance (LCL) filter. oscillatory nonlinear behaviour plant analyzed whole operating zone. Afterwards, controllers contain two loops cascade are described. first loop concerns current control, while second linked...

A promising solution to face the problems related integration of Distributed Generation (DG) with a high renewable energy penetration level is redesign distribution grid using concept MicroGrids (MGs). Due its constitutive components, production capacities, controllable loads and storage systems, MG can contribute market either as load or status change according resources availability needs main grid. The use system in plays an essential role order ensure balance also allowing maintaining...

Real time state of charge (SoC) and health (SoH) monitoring plays an essential role in electric vehicles, hybrid vehicles generally battery powered applications. Between these two estimations, only the SoC has been studied rigorously until current dates, while SoH or capacity estimation are much less referenced on literature. Additionally, strongly correlated by widely used coulomb counting equation consequently wrong would lead to a error, which turn, will further error. In this sense,...

The increasing penetration of Distributed Generation systems based on Renewable Energy Sources is introducing new challenges in the current centralized electric grid. Microgrids are one most useful and efficient ways to integrate renewable energy technologies. As stability a microgrid highly sensitive, an storage system essential it must satisfy two criteria: have high capacity be able supply fast power variations. In order these constraints, this paper proposes association Vanadium Redox...

In this paper, the limits of a Four-Wires Three-Level Neutral Point Clamped (4W-3L-NPC) inverter used as only interface between Hybrid Energy Storage System (HESS) supplied by renewable energy system and MicroGrid are under investigation. The investigation focus on power division exchange capabilities among Redox Flow Battery (VRB) Lithium-Ion (Li-Ion) battery, two storage systems investigated in context MicroGrid. final objective work is to define topology prove its capacity manage flow...