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Bidirectional single stage isolated DC-AC converter
... When demand outweighs generation, the primary solar source will power the help compensate. [2][3][4][5][6][7]. ...
... N switch � 10 * 1 + 2 � 12, (K � 1). (4) e no. of sources are estimated as follows: ...
Electrical power systems are accessible in renewable energy systems, and hybrid battery systems or energy storage systems (ESS) are capable of delivering uninterruptible power to the demand even if faults occur. Additionally, the energy storage device increases system dynamics during power fluctuations. A photovoltaic (PV) battery hybrid system with an ESS link is considered, and an impact leveling management system is planned to transfer the ability to load as well as the battery. Electricity generation is vital, and also the method is fairly complicated. The goal of lowering production prices, maintaining instrumentation, and its fuels, all play necessary roles within the method. As a result, producers should import fuel to satisfy the electrical demand, the assembly value rises. We are considering using renewable energy sources to avert a harmful economic imbalance. We tend to introduce a replacement system to complete the load of alternative energy. To boost inertia and improve frequency responsiveness, load side inverters linking PV to grid and energy storage systems are used on a utility-scale (ESS). Furthermore, with growing PV penetration, independent development of PV and ESS linking to the load and the battery is one of the alternatives for steady operation of the standalone system. The associate integrated the idea for PV and ESS integration to AC load and ESS and it is used for automotive applications.
... The advantages of this topology are that it can work under a wide range of input voltages and has high efficiency, but it suffers from high switching losses, greater number of components and a complex control algorithm. A topology named bidirectional single stage isolated DC-AC converter 12 , has some great advantages like it can work in DC-AC or AC-DC conversion mode and useful in UPS systems. Moreover, a wide range of input/output voltages is obtained, and high-voltage power semiconductor switches operate with soft switching, reducing associated power losses. ...
In this paper, a single stage buck–boost DC–AC converter based on coupled inductors is presented for renewable energy and electric vehicle applications. The proposed topology works with only three semiconductor switches, two diodes, and three coupled inductors to transfer input DC voltage to a high gain or low gain output AC voltage. A coupled inductor is used instead of normal inductors, which will reduce core and size requirements. The sinusoidal pulse width modulation strategy is used in this paper for controlling the main switch. There are many merits in the presented topology, like high gain up to five times of input voltage, compact size, less number of components, which results in reducing the overall cost, reducing switching loss, and increasing the converter efficiency. The simulation study is carried out using MATLAB/SIMULINK to simulate the operation of the proposed converter. Also, an experimental setup is built up to examine the actual operation of the proposed converter. There is a good agreement between simulation and experimental results which increases the validation and confidence of the model.
... За счет применения соответствующих алгоритмических решений в системе управления предлагаемый универсальный преобразователь может обеспечить близкий к единице коэффициент мощности со стороны входа переменного напряжения, что позволит эффективно работать в слабой электрической сети или от автономного генератора небольшой мощности. Схема силовой части преобразователя представляет собой доработанный вариант решения, опубликованного в работах [9,10], и представлена на рис. 1. ...
Представлено схемное решение и описание работы двунаправленного DC-AC преоб-разователя с трансформаторной изоляцией. В основе схемы лежат принципы, применяе-мые в резонансных LLC преобразователях и двойных активных мостах (DAB, Dual ActiveBridge), но в предлагаемой конструкции используется биполярное построение инвертора состороны переменного напряжения, а также совмещенное частотное и широтно-импульсное управление. Это дает возможность реализовать ряд функций в одном преоб-разователе, используя небольшое число коммутаций в силовой цепи. Так, возможна работав режиме источника бесперебойного питания (преобразование постоянного напряженияАКБ в переменное 220 В 50 Гц); инвертора связи с сетью альтернативных источников(солнечных панелей); зарядного устройства (работающего как от сети, так и от солнеч-ных панелей); сварочного инвертора для полуавтоматической сварки (причем сварку мож-но осуществлять как от сети, так и от АКБ); стабилизатора переменного напряжения;преобразователя постоянного напряжения (для «прикуривания» АКБ с разными напряже-ниями или степенью заряженности). Устройство с перечисленным набором функций мо-жет найти применение, например, в полевых условиях – для организации электропитанияразличных нагрузок, зарядки аккумуляторов, а также проведения мелких сварочных работ. Схемное решение преобразователя позволяет при применении соответствующих алгорит-мов управления работать с близким к единице коэффициентом мощности на стороне пе-ременного напряжения. Это дает возможность обеспечить работу в «слабой» сети – отавтономного генератора, при большой длине сетевого шнура и т.д.
... The reconfigured DAB converter used in this study is a predecessor of the basic DC-DC converter which can operate as a DC-AC converter. Furthermore, the topology examined in [64] is derived from an LLC DAB topology where the HFT secondary-side is cascaded with a bipolar HBC via an HFT. Two topologies [65]- [66] involve DC-AC network, one with a primary interleaved current-fed FBC combined with a voltage-fed 3P inverter and the latter one is composed of a FBC, loosely coupled HFT, a 1x3 MC and a rear-end LC filter. ...
The isolated AC-AC/DC-AC/AC-DC matrix converter (MC) is an innovative topology with several benefits including minimum current harmonics, nearly unity power factor, four quadrant (4Q) operation, and bidirectional power flow, making it an ideal choice for energy conversion techniques. Unlike any other AC-AC/DC-AC/AC-DC topologies, the MC topology necessitates electrical medium-frequency (MF)/ high-frequency (HF) isolation in order to offer single-stage power conversion. MF/HF power conversion topology has numerous advantages such as high-power density, reduced weight, and low noise while preserving converter’s efficiency, cost, and reliability. This paper aims to report an extensive analysis and classification of different conventional isolated single-stage AC-AC converter, DC-AC inverter, and AC-DC rectifier topologies along with their modified system architecture. In this paper, the AC-AC/DC-AC/AC-DC topologies are classified based on their system architecture, AC-side or DC-side drive techniques, and other subvariants. Our primary objective of this study is to impart a clear understanding of the overarching framework and principles of the isolated AC-AC/DC-AC/AC-DC MC topologies and stimulate the creation of new topologies that cater to specific grid-interconnection requirement.
... The reconfigured DAB converter used in this study is a predecessor of the basic DC-DC converter which can operate as a DC-AC converter. Furthermore, the topology examined in [64] is derived from an LLC DAB topology where the HFT secondary-side is cascaded with a bipolar HBC via an HFT. Two topologies [65]- [66] involve DC-AC network, one with a primary interleaved current-fed FBC combined with a voltage-fed 3P inverter and the latter one is composed of a FBC, loosely coupled HFT, a 1x3 MC and a rear-end LC filter. ...
p>The isolated AC-AC/DC-AC/AC-DC matrix converter (MC) is an innovative topology with several benefits including minimum current harmonics, nearly unity power factor, four quadrant (4Q) operation, and bidirectional power flow, making it an ideal choice for energy conversion techniques. Unlike any other AC-AC/DC-AC/AC-DC topologies, the MC topology necessitates electrical medium-frequency (MF)/ high-frequency (HF) isolation in order to offer single-stage power conversion. MF/HF power conversion topology has numerous advantages such as high-power density, reduced weight, and low noise while preserving converter’s efficiency, cost, and reliability. This paper aims to report an extensive analysis and classification of different conventional isolated single-stage AC-AC converter, DC-AC inverter, and AC-DC rectifier topologies along with their modified system architecture. In this paper, the AC-AC/DC-AC/AC-DC topologies are classified based on their system architecture, AC-side or DC-side drive techniques, and other subvariants. Our primary objective of this study is to impart a clear understanding of the overarching framework and principles of the isolated AC-AC/DC-AC/AC-DC MC topologies and stimulate the creation of new topologies that cater to specific grid-interconnection requirement.</p
... The reconfigured DAB converter used in this study is a predecessor of the basic DC-DC converter which can operate as a DC-AC converter. Furthermore, the topology examined in [64] is derived from an LLC DAB topology where the HFT secondary-side is cascaded with a bipolar HBC via an HFT. Two topologies [65]- [66] involve DC-AC network, one with a primary interleaved current-fed FBC combined with a voltage-fed 3P inverter and the latter one is composed of a FBC, loosely coupled HFT, a 1x3 MC and a rear-end LC filter. ...
p>The isolated AC-AC/DC-AC/AC-DC matrix converter (MC) is an innovative topology with several benefits including minimum current harmonics, nearly unity power factor, four quadrant (4Q) operation, and bidirectional power flow, making it an ideal choice for energy conversion techniques. Unlike any other AC-AC/DC-AC/AC-DC topologies, the MC topology necessitates electrical medium-frequency (MF)/ high-frequency (HF) isolation in order to offer single-stage power conversion. MF/HF power conversion topology has numerous advantages such as high-power density, reduced weight, and low noise while preserving converter’s efficiency, cost, and reliability. This paper aims to report an extensive analysis and classification of different conventional isolated single-stage AC-AC converter, DC-AC inverter, and AC-DC rectifier topologies along with their modified system architecture. In this paper, the AC-AC/DC-AC/AC-DC topologies are classified based on their system architecture, AC-side or DC-side drive techniques, and other subvariants. Our primary objective of this study is to impart a clear understanding of the overarching framework and principles of the isolated AC-AC/DC-AC/AC-DC MC topologies and stimulate the creation of new topologies that cater to specific grid-interconnection requirement.</p
The management of the electrical energy still raises a huge interest for end-users at the household level. Home electricity management systems (HEMS) have recently emerged both to warrant uninterruptible power and high power quality, and to decrease the cost of electricity consumption, by either shifting it in off peak time or smoothing it. Such a HEMS requires a bidirectional DC-AC converter, specifically when an energy transfer is required between a storage system and the AC-grid, and vice versa. This article points out the relevance of an innovative topology based on sinusoidal waveforms from the generation of sine half-waves. Such a topology is based on a DC-DC stage equivalent to an adjustable output voltage source and a DC-AC stage (H-bridge) which are in series. The results of a complete experimental procedure prove the feasibility to improve the power quality of the output signals in terms of total harmonic distortion (THD-values about 5%). The complexity of the proposed converter is minimized in comparison with multilevel topologies. Finally, wide band-gap semiconductor devices (SiC MOSFETs) are helpful both to warrant the compactness and the high efficiency (about 96%) of the bidirectional converter, whatever its operation mode (inverter or rectifier mode).
This paper presents a single-phase bidirectional current-source AC/DC converter for vehicle to grid (V2G) applications. The presented converter consists of a line frequency commutated unfolding bridge and an interleaved buck-boost stage. The low semiconductor losses of the line frequency commutated unfolding bridge contribute to the comparatively good efficiency of this converter. The buck and boost operating modes of the interleaved buck-boost stage provide operation over a wide battery voltage range. The interleaved structure of the interleaved buck-boost stage results in lower battery current ripple. In addition, sinusoidal input current, bidirectional power flow and reactive power compensation capability are also guaranteed. This paper presents the topology and operating principles of the presented converter. The feasibility of the converter is validated using MATLAB simulations, as well as experimental results.
This paper presents an on-board vehicular battery charger that integrates bidirectional AC/DC converter and DC/DC converter to achieve high power density for application in electric vehicles (EVs). The integrated charger is able to transfer electrical energy between the battery pack and the electric traction system and to function as an AC/DC battery charger. The integrated charger topology is presented and the design of passive components is discussed. The control schemes are developed for motor drive system and battery-charging system with a power pulsation reduction circuit. Simulation results in MATLAB/Simulink and experiments on a 30-kW motor drive and 3.3-kW AC/DC charging prototype validate the performance of the proposed technology. In addition, power losses, efficiency comparison and thermal stress for the integrated charger are illustrated. The results of the analyses show the validity of the advanced integrated charger for electric vehicles.
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