Reduced Dynamic Model of The Alternate Arm Converter

Sheridan, Caitriona E.; Merlin, Michaël M. C.; Green, Tim

doi:10.1109/compel.2014.6877125

Cited by 9 publications

(14 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This study assumes that the controller has been designed according to such design criteria and thus no harmonic current is circulating in the arms. The power exchanged with the top stack can be thus written as in (10). From the power equation (10b), the energy deviation of the positive arm can be derived (11).…”

Section: A Case Of the MMCmentioning

confidence: 99%

“…Besides, the AAC is capable of blocking the flow of current from the AC-side to the DC-side during a DC-side fault thanks to its stacks of full bridge cells and can even be operated as a STATCOM [9] during an outage of the DC bus. A reduced dnamic model of the AAC is presented in [10]. The AAC has also been used in DC-DC converter arrangements [11], [12] and it has been shown [13] that the AAC exhibits better thermal balance between its IGBT modules than the MMC.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Cell capacitor sizing in multilevel converters: cases of the modular multilevel converter and alternate arm converter

Merlin¹,

Green²

2015

IET Power Electronics

184

120

View full text Add to dashboard Cite

Section: A Case Of the MMCmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Cell capacitor sizing in multilevel converters: cases of the modular multilevel converter and alternate arm converter

Merlin¹,

Green²

2015

IET Power Electronics

184

120

View full text Add to dashboard Cite

“…During 2α, the expressions for i g_ac and i cir are depicted in (12) and (13), respectively. Moreover, (16) and (17) express i upper_arm and i lower_arm in terms of i g_ac and i cir , respectively…”

Section: Zcs Controlmentioning

confidence: 99%

“…Owing to this feature, the maximum voltage generated by each arm is half of the DC terminal voltage, which is approximately half compared with the MMC [13]. Therefore, the AAC requires lower number of cells; hence, the size and losses of the AAC are lower compared with the MMC [13,17]. The major advantages of the AAC include the number of SMs or cells per arm is greatly reduced (∼50% compared with the MMC) and the ability to block DC-side faults, as well as to ride through AC-side faults in each SM as mentioned in [12,13,[18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Arm energy balancing control in AACs: a comparative analysis

Leow

Ooi

2020

IET Power Electronics

View full text Add to dashboard Cite

The alternate arm converter (AAC) is an emerging state-of-the-art topology for voltage-source converter (VSC) by combining two-level converter and modular multilevel converter (MMC). The AAC performs better than the MMC in terms of the ability to block DC-side faults and ride through AC-side faults. Moreover, the number of sub-modules (SMs) per arm of the AAC is reduced by about 50% compared with the MMC. The key issue with AAC is the energy deviation during the alternate operation between the upper and lower arms. Presently, several AAC balancing techniques have been proposed, but no comparative analysis has been performed to provide insight on the effect of each balancing technique on AAC performance. In this study, five proposed balancing techniques are reviewed accordingly, followed by comparing them in terms of four parameters-the presence of DC filter, balancing capability, the presence of redundant SMs and zero-current switching control. Furthermore, a simulation work has been performed to study and compare the effects of each of the five balancing techniques. Both literature and simulation-based comparative analysis are significant to help select appropriate balancing technique as well as to provide helpful insights to improve the existing balancing techniques.

show abstract

“…The results in [29], [31], [32] were obtained using a full-switching simulation model and the main contributions in [31] and [30] were verified using a hardware prototype. In [13], an arm-level averaged model for the Alternate Arm Converter (AAC) was tested for dc-side fault response.…”

Section: Introductionmentioning

confidence: 99%

Modeling of MMCs With Controlled DC-Side Fault-Blocking Capability for DC Protection Studies

Leterme

Judge

Wylie³

et al. 2020

IEEE Trans. Power Electron.

View full text Add to dashboard Cite

The fault current characteristics in dc systems depend largely on the response, and hence also the topology, of the ac-dc converters. The presently used ac-dc converter topologies may be categorized into those with controlled or uncontrolled fault blocking capability and those lacking such capability. For the topologies of the former category, generic models of the dc-side fault response have not yet been developed and a characterization of the influence of control and sensor delays is a notable omission. Therefore, to support accurate and comprehensive dc system protection studies, this paper presents three reduced converter models and analyzes the impact of key parameters on the dc-side fault response. The models retain accurate representation of the dc-side current control, but differ in representation of the ac-side and internal current control dynamics, and arm voltage limits. The models were verified against a detailed (full-switched) simulation model for the cases of a full-bridge and a hybrid modular multilevel converter, and validated against experimental data from a lab-scale prototype. The models behave similarly in the absence of arm voltage limits, but only the most detailed of the three retains a high degree of accuracy when these limits are reached.

show abstract

Reduced Dynamic Model of The Alternate Arm Converter

Cited by 9 publications

References 15 publications

Cell capacitor sizing in multilevel converters: cases of the modular multilevel converter and alternate arm converter

Cell capacitor sizing in multilevel converters: cases of the modular multilevel converter and alternate arm converter

Arm energy balancing control in AACs: a comparative analysis

Modeling of MMCs With Controlled DC-Side Fault-Blocking Capability for DC Protection Studies

Contact Info

Product

Resources

About