In this paper, a novel approach using the discrete-time nonlinear observer (DNLO) is proposed for state-of-charge (SOC) estimation of lithium-ion batteries (LIBs). To design DNLO SOC estimation, state equations based on second-order resistor–capacitor equivalent circuit model are derived to simulate dynamic behaviors an LIB. Considering hysteresis characteristic battery, parameters depend and direction battery current simultaneously, then, exponential-function fitting method adopted identify...

DC microgrid has attracted more and attention due to its unique characteristics, but the development of a dc is also facing some challenges, such as interruption isolation short-circuit fault currents. Therefore, circuit breaker plays an important role in ensuring normal work microgrid. In this paper, novel bidirectional solid-state proposed realize flow energy, which ensures higher operating efficiency Compared with other breakers, topology simpler structure, common ground, fewer...

Due to the increasing penetration level of microgrids (MGs), it becomes a critical issue for MGs help sustaining power system stability. Therefore, ancillary services, such as low-voltage ride-through (LVRT) capability should be incorporated in order guarantee stable operation utility grid during faults. In this paper, LVRT control strategy based on positive/negative sequence droop is proposed grid-interactive voltage sags with not only inductive/resistive, but also complex line impedance....

The multilevel boost converter (MBC) has been widely adopted in the dc microgrid systems due to its high voltage gain and simple structure. In recent years, power electronic loads, which usually behave as constant loads (CPLs), are penetrating microgrids. incremental negative impedance of CPLs degrades stability systems. To ensure effective flow guarantee system stability, eliminating undesired effects is a necessity. this article, novel assorted nonlinear stabilizer, integrated with an...

In recent years, the electrical power capacity is increasing rapidly in more electric aircraft (MEA), since conventional mechanical, hydraulic and pneumatic energy systems are partly replaced by system. As a consequence, complexity of (EPS) will increase dramatically advanced EPSs need to be developed. This paper gives brief description constant frequency (CF) EPS, variable (VF) EPS high voltage (HV) EPS. Power electronics three overviewed.

A process is described where the position, size, and cladding of an InP nanowire with embedded InAsP quantum dot are determined by design through lithography, processing, growth. The vapor-liquid-solid growth mode on a patterned substrate used to grow core defines size better than ±2 nm while selective-area define thickness. clad nanowires emit efficiently in range λ=0.95–1.15 μm. Photoluminescence measurements quantify dependence excitonic energy level structure for diameters 10–40 nm.

Harmonics have been considered as one of the major issues in modern power grids. Considering high penetration level electronic converter interfaced distributed generation (DG) units, it is interest to provide ancillary services through DG interfacing converters, such harmonic compensation. In that case, multiple converters are utilized compensate harmonics, and compensation effort should be properly shared among these converters. However, rarely existing literatures operating different...

This paper introduces an optimized DC-DC converter that employs a modified switched inductor-capacitor technique to achieve ultra-high voltage gain for renewable energy systems. The development is based on adding one cell of inductor (MSL1) with series diodes interleaved the main switch in proposed converter. capacitor operates resonant mode reduce current stress across when charge becomes zero. approach also reduces switch, all inductors, and diodes. Furthermore, inductors (MSL2) auxiliary...

The battery(ESb)-supercapacitor(ESsc) hybrid energy storage system (HESS) is the most promising solution for DC microgrids (MGs) to realize power balance, where instability caused by high penetration of constant loads (CPLs) also a critical concern. To achieve decentralized automatic sharing and bus voltage regulation HESS in MGs towards large-signal stability, novel autonomous finite-time backstepping control (FTBC) algorithm proposed this article. First, taking characteristics...

Harmonics have been considered as one of the major issues in future power grids. With increasing demand advanced control functions, electronic converter interfaced distributed generators (DGs) are expected to perform harmonic compensation when necessary. It has demonstrated a number studies that DG converters operating voltage-controlled mode can be easily configured realize voltage utilizing naturally embedded loop. While for DGs current-controlled (CCM), such function was rarely studied....

In dc microgrid, energy storage system (ESS) plays a crucial role to provide short-or-long term and high-quality electric energy. The different control strategies for bidirectional dc-dc converter (BDC) of ESS in grid-tied islanded modes pose challenges the coordination microgrid. This paper proposes an autonomous scheme BDC proposed is based on <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math...

Optimal weights are usually obtained in neural network through a fixed conformation, which affects the practicality of network. Aiming at shortage conformation design and weight training algorithm application, back propagation (BP) learning combined with simulated annealing genetic (SAGA) is put forward. The multi-point optimization topology performed using hierarchical coding schemes operations. mechanism incorporated into Genetic Algorithm (GA) to optimize simultaneously. SAGA takes...

The silicon carbide (SiC) MOSFET is characterized by high operating voltage, temperature, switching frequency and efficiency which enables a converter to achieve power density. However, at frequency, the crosstalk phenomenon occurs when gate voltage spike introduced dv/dt ringing forces false turn-on of SiC causes crow-bar current thereby increasing losses. In order increase immunity against in half-bridge configuration, this paper presents driver for capable generating negative turn-off...

In this paper, a new single-cell hybrid switched inductor DC-DC converter is proposed to demonstrate the verification of ultra-high voltage gain in renewable energy applications (REA). The modification involves adding single cell an with diode and double capacitor increase transfer gain. Additionally, helps prevent input current from becoming zero, pulsating at very low duty cycles. interleaved main switch reduce stress when charge becomes zero. Moreover, addition modified capacitor,...

A high-efficiency DC-DC converter employing a modified architecture called the hybrid switched inductor–capacitor series (MHSLCS) is proposed in this paper. The primary goal to achieve notably ultra-high voltage gain for renewable energy systems (RESs). Furthermore, use of only one input capacitor MHSLCS eliminates pulsations current at both low and high duty ratios. integrates with (MSC) that interleaves main MOSFET, effectively doubling transfer gain. Additionally, parallel (MHSLCP)...

With the increasing integration of distributed generators (DGs), renewable energy sources (RESs), and storage systems (ESSs) in hybrid AC/DC microgrid (HMG), paralleled bidirectional interlinking converters (BILCs) play a significant role economic power interaction (EPI) between AC DC subgrids. This paper proposes dynamic event-triggered control (ETC) strategy for HMG to realize global operation. In each subgrid, sharing (EPS) among DGs can be achieved by droop controllers with no...

The interleaved floating multilevel boost converter (IFMBC), featuring high step-up ratio, power density, low operational stress, and current/voltage ripple, is a feasible interface to adapt low-voltage high-power energy sources DC microgrids (MGs). However, traditional control methods can hardly ensure the stability of IFMBC-interfaced MGs with tightly regulated constant loads (CPLs) negative nonlinear incremental impedance. Besides, parameter uncertainties IFMBC will further threaten MG,...