2015
DOI: 10.1109/tie.2014.2336608
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Abstract: Abstract-This paper studies different circulating current references for the modular multilevel converter (MMC). The circulating current references are obtained from the instantaneous values of the output current and modulation signal of the phase-leg. Therefore, determination of the amplitude and phase of the output current is not needed, which is a significant improvement compared to other methods such as those based on injecting specific harmonics in the circulating currents. Among the different methods stu… Show more

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Cited by 340 publications
(206 citation statements)
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“…Arm currents of an MMC phase-leg contain i) a dccomponent, ii) a fundamental frequency component (corresponding to 50% of the phase current), and iii) higher order harmonic currents which are usually suppressed by the circulating current controller. The two circulating current control methods used in the analysis are the double-frequency rotating reference frame-based circulating current suppressing control (CCSC) [19] and the stationary reference frame-based forced circulating current control (FCCC) [20] shown in Fig. 12.…”
Section: Arm Current Controllersmentioning
confidence: 99%
“…Arm currents of an MMC phase-leg contain i) a dccomponent, ii) a fundamental frequency component (corresponding to 50% of the phase current), and iii) higher order harmonic currents which are usually suppressed by the circulating current controller. The two circulating current control methods used in the analysis are the double-frequency rotating reference frame-based circulating current suppressing control (CCSC) [19] and the stationary reference frame-based forced circulating current control (FCCC) [20] shown in Fig. 12.…”
Section: Arm Current Controllersmentioning
confidence: 99%
“…The energy stored in the upper and the lower arm are equalized [21]. The current controllers are designed following the technical optimum principle [22].…”
Section: Control and Modulationmentioning
confidence: 99%
“…The output circulating voltage is added to the upper and lower phase-arm voltages to calculate the total upper and lower arm voltage references. These are sent to the modulation strategy block [13,14]. o Modulation strategy.…”
Section: Converter Stationsmentioning
confidence: 99%