A new interleaved three-level Boost converter and neutral-point potential balancing

Zhou, Hao; Zhou, Jinghua; Hu, Bing; Tong, Chaonan

doi:10.1109/imsna.2013.6743471

Cited by 10 publications

(7 citation statements)

References 4 publications

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“…Three-level boost converter has originally been proposed to reduce the voltage stress on power switches by 50 percent as compared with the conventional boost converter [14]. In [18], authors developed an interleaved version of the threelevel boost converter which balances the neutral-point potential mainly to cope with the neutral-point drifting problem. In this paper, for the integration in bipolar dc microgrids, the design of the conventional three-level boost converter is changed so that it fulfills the proposed voltagebalancing strategy, in particular, in the presence of unbalanced loads.…”

Section: Balancing Challengementioning

confidence: 99%

Decentralized Voltage Balancing and Power Sharing in Islanded Bipolar DC Microgrids

Tavakoli¹

2020

Preprint

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<div>This paper presents a decentralized control scheme for voltage balancing and power sharing in bipolar dc</div><div>microgrids. This relies on utilizing a converter topology which offers three levels of output voltage availability with the key features of boosting the input voltage and balancing the output voltages. This converter makes it possible to further improve the structure of bipolar dc microgrids as it does not require a central voltage balancer. Small-signal analysis is done and system transfer functions are derived. Based on the RGA concept the highly coupled input-output pairs are found which helps with replacing the MIMO control system of the converter by two SISO systems. The appropriate voltage and current controllers are designed based on SISO principles. Moreover, a double droop control method is proposed which fulfills the simultaneous power sharing and voltage regulation of DG units in the host microgrid. The effectiveness of the proposed control strategy is demonstrated through simulation studies conducted on an</div><div>islanded bipolar dc microgrid involving unbalanced loads, while the voltage balancing of the bipolar dc microgrid and the power sharing accuracy are evaluated.</div>

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Section: Balancing Challengementioning

confidence: 99%

Decentralized Voltage Balancing and Power Sharing in Islanded Bipolar DC Microgrids

Tavakoli¹

2020

Preprint

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“…A three‐level boost type converter was proposed to reduce the switch voltage stress [40]. However, the voltage gain of the converter is limited, and the voltages of the capacitors cannot be balanced automatically in open‐loop control.…”

Section: Introductionmentioning

confidence: 99%

Three‐phase interleaved high step‐up bidirectional DC–DCconverter

Wang

et al. 2020

IET power electron.

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“…Also, the proposed topologies in [18,19] cannot transfer power between output terminals. Some three-level (TL) converters with dual output are proposed in [4,6,[20][21][22][23][24][25][26][27][28][29][30][31][32] which are explained more as follows. The TL converters in [20][21][22][23] provide one output voltage that are not applicable in BDCMG.…”

Section: Introductionmentioning

confidence: 99%

“…The TL converters in [20][21][22][23] provide one output voltage that are not applicable in BDCMG. Other TL [24][25][26][27][28][29][30][31][32][33][34][35][36][37] and dualoutput converters [28][29][30]33], which are suitable for bipolar DC grid application, cannot transfer power between output terminals. Another dual-output converter is proposed in [34] which provides step-down and step-up voltage in output terminals, but it does not consider power transferring between output terminals.…”

Section: Introductionmentioning

confidence: 99%

Dual‐output DC/DC boost converter for bipolar DC microgrids

Rezayi

Iman‐Eini

Hamzeh

et al. 2019

IET Renewable Power Generation

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This study presents a new step-up DC/DC converter for bipolar DC microgrids. This relies on utilising a new converter topology which offers bipolar DC outputs with the key features of boosting the input voltage and balancing the output voltages. In addition, the proposed converter can transfer power from output terminals to the input side which leads to energy saving. Due to the microgrid's loading conditions, different modes can be considered, and the operational principles are analysed in details. Applying the circuit average method, the small signal model of the proposed converter is derived. Then the appropriate controllers are designed considering the small signal model of the converter in each mode. Finally, a prototype of the proposed converter has been implemented in the laboratory, and the experimental results have verified the converter's ability to balance the bipolar DC grid's voltages and its capability of transferring power in various microgrid's conditions.

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A new interleaved three-level Boost converter and neutral-point potential balancing

Cited by 10 publications

References 4 publications

Decentralized Voltage Balancing and Power Sharing in Islanded Bipolar DC Microgrids

Decentralized Voltage Balancing and Power Sharing in Islanded Bipolar DC Microgrids

Three‐phase interleaved high step‐up bidirectional DC–DCconverter

Dual‐output DC/DC boost converter for bipolar DC microgrids

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