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This study offers a thorough examination of the zero voltage switching (ZVS) operation range and deadband conditions for a bidirectional DC-DC converter with phase shift …
Power electronic conversion plays an important role in flexible AC or DC transmission and distribution systems, integration of renewable energy resources, and energy storage systems to enhance efficiency, controllability, stability, and reliability of the grid. The efficiency and reliability of power electronic conversion are critical to power system …
In recent years, dc microgrids have been widely concerned for natural interface with renewable energy sources, dc loads, and energy storage systems (ESS). A novel neutral point clamped (NPC) dual-active-bridge (DAB) converter with a blocking capacitor is proposed for ESS in dc microgrids. By inserting a blocking capacitor in primary loop of the traditional NPC DAB …
In battery energy storage systems, the battery and DC bus voltages vary greatly. This makes it difficult for the battery storage converter to maintain high efficiencies under all circumstances. A current-fed isolated bidirectional DC–DC converter is presented in this paper. This converter contains two series transformers, two conventional current-fed half-bridges at …
A pulsewidth modulation plus secondary-side phase-shift (SSPS) controlled full-bridge three-port converter (FB-TPC) is proposed for a renewable power system, derived by integrating two interleaved buck/boost circuits and a SSPS full- bridge converter (FBC), to interface the energy source, energy storage element, and output load simultaneously. In this …
The energy transferred from the source to the output capacitor is the sum of energy W 1 taken from the source to charge the capacitors (11) and energy W 2 taken from the source during the ...
ZVS condition is realised at heavy load condition. The operating principles and the design considerations of the proposed ... energy storage systems (ESSs) such as batteries and ultra-capacitors need to use and save the energy. Moreover, ESSs also act as power supplies for the DC-load. Therefore, the DC–DC converter that allows the ...
This paper explores a bidirectional DC-DC converter for supercapacitor-based energy storage systems in automotive applications. The presented converter consists of a half-bridge converter and a ...
Improved bidirectional DC/DC converter configuration with ZVS for energy storage system: analysis and implementation. Veera Venkata Subrahmanya Kumar Bhajana, Corresponding Author. ... The energy stored in the inductor L x should be greater than the energy stored in the capacitor C x. To ensure ZVS in S 1 and S 2, the following condition must ...
This study proposes a novel design of soft-switching based bidirectional converter for the applications in energy storage systems. By implementing an additional auxiliary circuit to the conventional non-isolated converter, the proposed converter inherits better efficiency with minimised turn-on losses.
renewable energy conversion systems and energy storages systems. In the battery energy storage system applications, bidirectional converters [2] are used to interface ultra-capacitors …
clamping capacitor, where voltages across three primary switches can be limited at the input voltage plus clamping capacitor voltage that is less than twice of input voltage. However, the ZVS operation under light load is still determined by the leakage energy and the circulating current is rather large leading to excess conduction loss.
Two bidirectional switches in the current-source bridge side and a novel modulation algorithm allow soft switching of all semiconductors under wide load conditions with a relatively low energy circulation and without any dedicated snubbers or clamp circuits. This article proposes a bidirectional isolated dc–dc converter topology with the current-source and voltage …
By replacing one of the two capacitors in the Z-source impedance network with an energy storage system (e.g. a battery) and controlling the shoot through duty cycle and modulation index independently, a Z-source
These modifications allow the use of lower voltage storage capacitors. In the solution evaluated in [5] and [8] the energy is restored through a buck-boost dc-dc converter that behaves as a QSC (Quasi-Square-Wave) ZVS (Zero Voltage Switching). This topology operates with fixed and independent duty cycle, what makes its operation simple to ...
This paper deals with a new soft-switched interleaved bidirectional DC–DC converter for energy storage systems. The conventional interleaved bidirectional converter incorporates with an additional auxiliary circuit to attain soft turn-on operation of the main switching devices (IGBTs). The proposed converter is operated in boost and buck modes with …
Power electronic conversion plays an important role in flexible AC or DC transmission and distribution systems, integration of renewable energy resources, and energy storage systems to enhance efficiency, controllability, …
PSM, the ZVS ranges for both side MOSFETs are squeezed. Furthermore, with the increasing of β, ZVS range is expanded. Therefore, ZVS is determined by the output power level and ZVS becomes easy in high power scenarios. For a given output power, minimized RMS tank current means minimized circulating current with decreased conduction loss.
Battery Energy Storage Systems Yuxiang Shi, Rui Li, Hui Li ... smaller cell capacitors; moreover, the inherent ZVS condition for all the switches enables high-frequency operation. Unlike
ZVS at duty cycles that are not possible with 5-level operation alone, as well as a dynamic level transition with active capacitor voltage balancing. I. INTRODUCTION Flying capacitor multi-level (FCML) converters utilize one or more flying capacitors as energy storage elements to reduce the switch voltage stress of each transistor and to ...
A new soft-switching high-gain two-source dc-dc boost converter is proposed here. The proposed converter provides two bidirectional and unidirectional input ports, handling the energies of a battery storage and a renewable power source, respectively, to supply a resistive load through a switched-capacitor (SC) voltage multiplier.
This paper presents a new control method for a bidirectional DC–DC LLC resonant topology converter. The proposed converter can be applied to power the conversion between an energy storage system ...
Two bidirectional switches in the current-source bridge side and a novel modulation algorithm allow soft switching of all semiconductors under wide load conditions with a relatively low …
In this paper, a non-isolated stacked bidirectional DC-DC converter with zero-voltage-switching (ZVS) is introduced for the high step-up/step-down conversion systems. The extremely narrow turn-on and/or turn-off duty cycle existing in the conventional bidirectional buck-boost converters can be extended due to the stacked module configuration for large voltage …
Abstract: This study proposes a novel design of soft-switching based bidirectional converter for the applications in energy storage systems. By implementing an additional auxiliary circuit to …
An isolated PWM plus phase-shift controlled ZVS bidirectional converter with coupled inductors ... power electronic energy storage systems using super capacitor bank have been widely studied and ...
By adding the blocking capacitor in the primary side of one transformer, an extended zero voltage switching (ZVS) range is obtained in a wide output voltage range, which is achieved by regulating ...
1.1.2 Electrical Vehicle. An oil supply crisis and the prospect of reducing carbon emission promote the automobile manufacturer to develop hybrid vehicles and electrical vehicles (EVs) [3, 4] gure 1.2 shows the on/off board charging system and power level of EVs [].There are many power converters used to exchange energy for different power levels, including the …
The proposed converter can boost the voltage of an energy-storage module (e.g. batter... Skip to main content. Search. ... Pascual C. and Krein P.T. Switched capacitor system for automatic series battery equalization IEEE Applied Power Electronics Conf. 1997 848-852 vol. 2 ... Li H., Su G.J., and Lawler J.S. A new ZVS bidirectional DC-DC ...
This letter presents a high-power-density multi-input dc-dc converter interfaced with energy storage elements such as a battery and an ultracapacitor. The converter consists …
The charging time of the energy storage capacitor increases to compensate for the insufficient energy of the energy storage capacitor caused by the drop in the input current [20]. A special ...
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