Lifetime and reliability improvements in modular multilevel converters using controlled circulating current
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Power Electronics"
DOI: 10.1007/s43236-021-00297-7
Abstract: Circulating current has been an inherent feature of modular multilevel converters (MMC), which results in second-order harmonics on the arms currents. If not properly controlled, the circulating current can affect the lifetime and reliability of… read more here.
Keywords: modular multilevel; circulating current; controlled circulating; multilevel converters ... See more keywords
Circulating current control scheme of modular multilevel converters supplying passive networks under unbalanced load conditions
Sign Up to like & getrecommendations! Published in 2019 at "Electric Power Systems Research"
DOI: 10.1016/j.epsr.2019.01.041
Abstract: Abstract Load imbalances in the supply of passive loads with modular multilevel converter (MMC)-based medium (MVDC) and high voltage (HVDC) dc-links are inevitable. In such applications, the maximum-allowable voltage ripples and peak arm currents define… read more here.
Keywords: load conditions; unbalanced load; current control; modular multilevel ... See more keywords
Elimination of circulating current in parallel operation of single phase inverter using droop controller
Sign Up to like & getrecommendations! Published in 2021 at "Engineering Science and Technology, an International Journal"
DOI: 10.1016/j.jestch.2021.06.005
Abstract: Abstract This paper presents the control strategy for parallel operation of an inverter to eliminate DC & AC circulating current. This paper also analyses the cross-current between parallel connected inverter due to the difference in… read more here.
Keywords: inverter; phase; parallel operation; circulating current ... See more keywords
Circulating Current Analysis and Suppression for Module Grid-Connected Inverters Under Unbalanced Conditions
Sign Up to like & getrecommendations! Published in 2018 at "IEEE Access"
DOI: 10.1109/access.2018.2877955
Abstract: Parallel photovoltaic inverters system can increase the power rating and efficiency. However, the zero-sequence circulating current (ZSCC) will be generated under unbalanced conditions. Therefore, this paper proposes a ZSCC control scheme for the M-paralleled (… read more here.
Keywords: inverters unbalanced; analysis; circulating current; filter parameters ... See more keywords
An MMC Circulating Current Suppressing Controller Based on Bridge Arm Common-Mode Voltage
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Access"
DOI: 10.1109/access.2020.3031307
Abstract: Modular Multilevel Converter (MMC) bridge arm circulating current increases the MMC bridge arm current distortion and bridge arm current stress, whereas it also increases converter losses and capacitor voltage fluctuations. In this paper, based on… read more here.
Keywords: circulating current; controller; bridge arm; ccsc ... See more keywords
Decentralized Suppression Strategy of Common Ground Circulating Current Caused by Grounding Fault in PV Modules in Single-Phase PV Grid-Connected Systems
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Journal on Emerging and Selected Topics in Circuits and Systems"
DOI: 10.1109/jetcas.2022.3154156
Abstract: The complicated series-parallel wiring and aged insulation of photovoltaic (PV) power plants leave the system prone to PV grounding faults. The resultant common ground circulating current will increase the operation stress of the switching devices… read more here.
Keywords: common ground; grounding fault; ground circulating; circulating current ... See more keywords
Deadbeat Control Strategy for Circulating Current Suppression in Multiparalleled Three-Level Inverters
Sign Up to like & getrecommendations! Published in 2018 at "IEEE Transactions on Industrial Electronics"
DOI: 10.1109/tie.2017.2786234
Abstract: This paper proposes a zero-sequence circulating current (ZSCC) control scheme for the multiparalleled three-level T-type inverters (3LT2Is). Based on the analysis with the proposed generalized model of multiparalleled 3LT2Is, it is seen that the ZSCC… read more here.
Keywords: deadbeat control; multiparalleled three; control; circulating current ... See more keywords
Optimal Discontinuous Space Vector PWM for Zero-Sequence-Circulating Current Reduction in Two Paralleled Three-Phase Two-Level Converter
Sign Up to like & getrecommendations! Published in 2021 at "IEEE Transactions on Industrial Electronics"
DOI: 10.1109/tie.2020.2969068
Abstract: This article proposes an optimal discontinuous pulsewidth modulation (ODPWM) strategy to reduce the zero-sequence circulating current (ZSCC) for paralleled three-phase two-level converters. While existing methods generally entail a tradeoff between the ZSCC peak and the… read more here.
Keywords: sequence circulating; vector; optimal discontinuous; paralleled three ... See more keywords
A Time-Delayed Filter Based Suppression Method of Circulating Current in Modular Multilevel Converters
Sign Up to like & getrecommendations! Published in 2021 at "IEEE Transactions on Industrial Electronics"
DOI: 10.1109/tie.2020.3026291
Abstract: In modular multilevel converter (MMC), the existence of second- and other even-order harmonics in the circulating currents can have a negative impact on the operation of the converter. To mitigate the dominant second-order harmonic circulating… read more here.
Keywords: modular multilevel; time delayed; circulating current; filter based ... See more keywords
Dynamic Circulating Current Suppression Method for Multiple Hybrid Power Parallel Grid-Connected Inverters With Model Reference Adaptive System
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Transactions on Industrial Electronics"
DOI: 10.1109/tie.2021.3084166
Abstract: Aiming at the problem of large harmonic distortion of grid-connected current in high-power grid-connected power generation system under weak sunlight, multiple hybrid power parallel inverters (MHPPIs) composed of some identical high-power inverters and one low-power… read more here.
Keywords: dynamic circulating; current suppression; power; grid connected ... See more keywords
Circulating-Current-Excited Switched Reluctance Generator System With Diode Rectifier
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Transactions on Industrial Electronics"
DOI: 10.1109/tie.2021.3108696
Abstract: In this article, a circulating-current-excited switched reluctance generator system using a standard diode rectifier is proposed and examined. It features a dc power source connected in series with the ring-connected windings, which provides the dc-bias… read more here.
Keywords: system; generator; circulating current; diode rectifier ... See more keywords