A Review of Galvanically Isolated Impedance-Source DC–DC Converters

Chub, Andrii; Vinnikov, Dmitri; Blaabjerg, Frede; Peng, Fang Zheng

doi:10.1109/tpel.2015.2453128

Cited by 207 publications

(105 citation statements)

References 75 publications

(110 reference statements)

Supporting

Mentioning

104

Contrasting

Order By: Relevance

“…In the second operating mode, the value of current through D 2 follows from (37). When sum of the current through inductors is decreased and its value reaches to load current; current through capacitor C 1 reaches to −i L and diode D 2 is turned off; so the third operating is achieved.…”

Section: Third Operating Modementioning

confidence: 99%

“…Then, a section about design considerations is provided. 37 The proposed inverters with selecting appropriate switching patterns can generate output voltage with low frequency (50 − 60 Hz)too. To show proper operation of proposed topologies and to verify validity of derived equations, simulation results using PSCAD/EMTDC software and experimental results are provided.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A class of half‐bridge quasi‐Z‐source inverters: Detailed steady‐state analysis in various operating states, design considerations, and derivation of general topology

Sedaghati

Asl

2018

Circuit Theory & Apps

View full text Add to dashboard Cite

In this paper, 2 types of half-bridge quasi-Z-source inverters with detailed analysis are proposed. Unlike the classical half-bridge inverter, both types of proposed half-bridge inverters can generate zero voltage level in output. Moreover, lack of continuous input current in conventional half-bridge inverters is resolved by the second type of proposed inverters. One of the important advantages of proposed inverters is using the 1 impedance network only with 2 capacitors and 2 inductors; whereas, most of the half-bridge Z-source inverters have more than 1 impedance network or use additional semiconductor elements. In this paper, operation principles of proposed inverters in different operating modes are discussed. Then, design considerations and calculation of critical Inductance in boundary conditions between 2 different states are provided. Next, power circuit of general topology with multiple DC sources and derivation of subcircuits are proposed. Finally, to verify validity of derived equations, simulation results using PSCAD/EMTDC software and experimental results are provided.KEYWORDS half-bridge inverter, quasi-Z-source inverter, shoot-through, Z-source inverter

show abstract

Section: Third Operating Modementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A class of half‐bridge quasi‐Z‐source inverters: Detailed steady‐state analysis in various operating states, design considerations, and derivation of general topology

Sedaghati

Asl

2018

Circuit Theory & Apps

View full text Add to dashboard Cite

show abstract

“…The single line diagram of a DCSOP is shown in Figure 3. In this study, the galvanically isolated bidirectional DC/DC converter based on VSCs and a high-frequency transformer [18] is used for the DCSOP. The DCSOP can achieve electrical isolation between DC feeders, and function as a DC breaker to isolate short fault occurs in the MVDC grid.…”

Section: Dcsopmentioning

confidence: 99%

“…Thus, the SOCs of ESS should be bounded by Equation (17). As shown in (18), the SOC at each time-step depends on the charging or discharging power at the previous time-step, as well as on the historical SOCs. Besides, the SOCs at the beginning of the day and the end of the day are expected to be the same.…”

Section: Constraints Of the Energy Storage System (Ess)mentioning

confidence: 99%

Optimal Power Scheduling for a Medium Voltage AC/DC Hybrid Distribution Network

et al. 2018

View full text Add to dashboard Cite

Abstract:With the great increase of renewable generation as well as the DC loads in the distribution network; DC distribution technology is receiving more attention; since the DC distribution network can improve operating efficiency and power quality by reducing the energy conversion stages. This paper presents a new architecture for the medium voltage AC/DC hybrid distribution network; where the AC and DC subgrids are looped by normally closed AC soft open point (ACSOP) and DC soft open point (DCSOP); respectively. The proposed AC/DC hybrid distribution systems contain renewable generation (i.e., wind power and photovoltaic (PV) generation); energy storage systems (ESSs); soft open points (SOPs); and both AC and DC flexible demands. An energy management strategy for the hybrid system is presented based on the dynamic optimal power flow (DOPF) method. The main objective of the proposed power scheduling strategy is to minimize the operating cost and reduce the curtailment of renewable generation while meeting operational and technical constraints. The proposed approach is verified in five scenarios. The five scenarios are classified as pure AC system; hybrid AC/DC system; hybrid system with interlinking converter; hybrid system with DC flexible demand; and hybrid system with SOPs. Results show that the proposed scheduling method can successfully dispatch the controllable elements; and that the presented architecture for the AC/DC hybrid distribution system is beneficial for reducing operating cost and renewable generation curtailment.

show abstract

“…The boost DC‐DC converters are divided into a large number of classifications. In the isolated DC‐DC converters, the high‐voltage gain is obtained by increasing the turns ratio of the high‐frequency transformer . However, high‐circulating current, the high voltage stress across the output diode, and low efficiency are the significant drawbacks in this method .…”

Section: Introductionmentioning

confidence: 99%

P‐type non‐isolated boost DC‐DC converter with high voltage gain and extensibility for DC microgrid applications

Mohammadi

Farhadi‐Kangarlu

Rastegar

et al. 2019

Circuit Theory & Apps

View full text Add to dashboard Cite

Summary In this paper, the concept of converter design, using the least number of elements and achieving high voltage gain at the low duty cycle, is proposed for the microgrids. One of the important issues in the microgrids is boosting the low voltage output of sources to the utility voltage level. Therefore, the step‐up DC‐DC converters are widely used in these systems to attain the utility voltage. The benchmarking of the converters mainly in terms of the voltage gain, efficiency, the number of active and passive components, stresses on semiconductors, and simplicity is considered. In this paper, a new extendable non‐isolated boost DC‐DC converter is presented. Comparing the conventional boost converter, the basic structure of the proposed converter has a high voltage gain and reduced stress on the switch. To increase the voltage gain, the basic structure of the proposed converter can be easily extended. The modulation technique employed is high‐frequency pulse‐width modulation (PWM). The detailed analysis of the proposed converter in continuous current mode (CCM) and discontinuous current mode (DCM) is presented. The relations between currents and voltages and the voltage gain in CCM and DCM are obtained. Experimental results are carried out to verify theoretical concepts by using the hardware prototype.

show abstract

A Review of Galvanically Isolated Impedance-Source DC–DC Converters

Cited by 207 publications

References 75 publications

A class of half‐bridge quasi‐Z‐source inverters: Detailed steady‐state analysis in various operating states, design considerations, and derivation of general topology

A class of half‐bridge quasi‐Z‐source inverters: Detailed steady‐state analysis in various operating states, design considerations, and derivation of general topology

Optimal Power Scheduling for a Medium Voltage AC/DC Hybrid Distribution Network

P‐type non‐isolated boost DC‐DC converter with high voltage gain and extensibility for DC microgrid applications

Contact Info

Product

Resources

About