Selective Harmonic Elimination for Modular Multilevel Converter with Averaging and Circulating Current Control

Kannan, Shrinath; Poongothai, C.; Colak, Ilknur; Ali, Waqas

doi:10.1109/icrera.2018.8566971

Cited by 4 publications

(2 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The aim of this control is to generate a voltage reference for each leg that will be used thereafter to generate the modulation index m in the case of an average model, or the pulses g i in the case of a detailed switching model [25], [26]. In this paper, only the average model is used since the paper focuses on the system level.…”

Section: ) Voltage Reference Generationmentioning

confidence: 99%

Assessment of Sequence Extraction Methods Applied to MMC-SDBC STATCOM Under Distorted Grid Conditions

Meligy

Qoria

Colak

2022

IEEE Trans. Power Delivery

Self Cite

View full text Add to dashboard Cite

Under grid distortions, Modular Multilevel Converters (MMC) must adopt proper control strategies to fulfill the power system requirements and ensure a stable operation. An inappropriate control under such conditions may lead to energy unbalances between the MMC legs, inaccurate current injection, and failure in the synchronization process. In this context, sequence extraction methods play a critical role in enhancing the performance of the control, firstly, by aiding the Phase-Locked Loop (PLL) to maintain the synchronization with the AC grid by following the positive sequence fundamental component of the voltage, secondly, by allowing an accurate active and reactive currents injection via the decoupled Voltage Oriented Control (dVOC), thirdly, by properly managing the internal energy of the MMC through the circulating current control. In prior researches, some sequence extraction methods have been used for MMC STATCOM. However, the sequence extraction was not the core of the performed studies and their impact on the system behavior has not been highlighted or tested in several grid conditions. This work fills this gap by first assessing the performance of a Single Delta Bridge Cell MMC (SDBC-MMC) STATCOM with four well-known sequence extraction methods (i.e., Decoupled Double Synchronous Reference Frame (DDSRF), Dual Second Order Generalized Integrator (DSOGI), Improved DSOGI, and Fortescue matrix-based (FMB) filter) under normal and abnormal grid conditions, then, finding the most suitable one in terms of stability, dynamics, and functionalities.

show abstract

Section: ) Voltage Reference Generationmentioning

confidence: 99%

Assessment of Sequence Extraction Methods Applied to MMC-SDBC STATCOM Under Distorted Grid Conditions

Meligy

Qoria

Colak

2022

IEEE Trans. Power Delivery

Self Cite

View full text Add to dashboard Cite

show abstract

“…Some of them are nonlinear methods, such as hysteresis control [21,22], sliding mode control [23] and others [24,25]. In classical SHE approach, the switching angles are the unknowns of the problem [26]. A transcendental equation system that sets to zero the amplitudes of the harmonics to delete, is solved.…”

Section: Introductionmentioning

confidence: 99%

Low-Frequency Harmonic Elimination Technique in Cascaded H-Bridges Multilevel Inverters for Renewable Energy Applications

2019

View full text Add to dashboard Cite

This paper proposes a selective harmonic elimination technique for medium and high power three phase cascaded H-bridges l-level inverters at fundamental frequency. Compared to other SHE methods, it is capable to delete more harmonics from the output voltage waveform and to provide lower total harmonic distortion values. A mathematical proof is given to demostrate that undeleted harmonics are only those of order n = 2k (l + r) ± 1, k = 1, 2, . . ., where r is an integer parameter that assumes the values −2, −1, 0, de ning three di erent sets of switching angles, provided within the whole range of modulation index. Proposed method assumes the availability of di erent dc voltage sources and pulses patterns, de ned for the three sets of switching angles. Simulated results are shown to con rm the validity of the proposed procedure. For l = 5 and l = 7, obtained results have been compared with those obtained with a conventional SHE technique at the same conditions. Very good performances, in terms of number of deleted harmonics and THD, are observed when r = 0, moreover, in comparison with classical SHE, proposed method o ers reduced computational complexity because it does not require the solution of non linear equations.

show abstract

SDBC-MMC STATCOM Control Under Unbalanced Grid Conditions Based on Different Sequence Extraction Methods

Meligy

Qoria

Ali

et al. 2021

IECON 2021 – 47th Annual Conference of the IEEE Industrial Electronics Society

View full text Add to dashboard Cite

Selective Harmonic Elimination for Modular Multilevel Converter with Averaging and Circulating Current Control

Cited by 4 publications

References 10 publications

Assessment of Sequence Extraction Methods Applied to MMC-SDBC STATCOM Under Distorted Grid Conditions

Assessment of Sequence Extraction Methods Applied to MMC-SDBC STATCOM Under Distorted Grid Conditions

Low-Frequency Harmonic Elimination Technique in Cascaded H-Bridges Multilevel Inverters for Renewable Energy Applications

SDBC-MMC STATCOM Control Under Unbalanced Grid Conditions Based on Different Sequence Extraction Methods

Contact Info

Product

Resources

About