Modular Multilevel Converter With Capacitor Voltage Self-balancing Using Reduced Number of Voltage Sensors

Yin, Taiyuan; Wang, Yue; Wang, Xiaolei; Yin, Shiyuan; Sun, Shumin; Li, Guanglei

doi:10.23919/ipec.2018.8507878

Cited by 17 publications

(10 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, a novel topology with SM voltage self-balancing and DC fault ride-through ability is described in Fig. 2 (c) [38], where the full bridge SMs are removed from the original topology. Finally, a local voltage balancing topology with bigger power capacity is presented in Fig.…”

Section: A Conventional Topologiesmentioning

confidence: 99%

“…2) The number of power modules including IGBT, diodes, clamping inductors can be greatly reduced, and no additional arm inductor integration [37]. 3) The number of IGBT, diodes are reduced, and no additional resource is needed to regulate the voltage of the first module [38]. 4) The number of IGBT and voltage sensors are significantly reduced.…”

Section: Comparisons Between Different Topologymentioning

confidence: 99%

“…However, the structure is much more complex where more switches are needed. In [38], a voltage balancing topology with fault ride-through ability is proposed. Although this topology can operate under DC fault and only need only 3 voltage sensors, the structure is a little complicated.…”

Section: Introductionmentioning

confidence: 99%

“…It can significantly reduce the number of SM voltage sensors and [36], (b) Parallel-connected diode-clamped topology [37]. (c) Balancing topology with fault ride-through ability [38]. (d) Local voltage balancing topology with increased power capacity [39].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A Novel Submodule Voltage Balancing Scheme for Modular Multilevel Cascade Converter—Double-Star Chopper-Cells (MMCC-DSCC) Based STATCOM

et al. 2019

View full text Add to dashboard Cite

A novel capacitor voltage balancing scheme for modular multilevel cascade converter-doublestar chopper-cells (MMCC-DSCC)-based STATCOM is proposed in this paper. Compared with the conventional software voltage balancing methods, the proposed scheme has three main advantages. First, only six voltage sensors are needed, and other voltage sensors have been removed. Then, the control framework can be simple without sort and select process, or some balancing control loops. Additional delay process caused by the sampling and control signals transmission is also mitigated. Finally, the faster capacitor balancing speed can be obtained. In addition, compared with some other hardware voltage balancing schemes, there are superior characteristics in terms of the reduced number of switches and only the popular power modules in the additional units are applied. For these additional modules, the parameters design guide of the proposed scheme has been discussed. Verified results from the 13-level simulated system and 9-level experimental platform for the MMCC-DSCC based STATCOM show the effectiveness of the proposed scheme. By the proposed scheme, both DC capacitor voltage balancing control and reactive power compensation are simultaneously realized for the MMCC-DSCC-based STATCOM even in balanced and unbalanced load. INDEX TERMS Diode-clamped circuit, double-star chopper-cell (DSCC), modular multilevel cascade converter (MMCC), voltage balancing, STATCOM.

show abstract

Section: A Conventional Topologiesmentioning

confidence: 99%

Section: Comparisons Between Different Topologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Novel Submodule Voltage Balancing Scheme for Modular Multilevel Cascade Converter—Double-Star Chopper-Cells (MMCC-DSCC) Based STATCOM

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Modular multilevel converters (MMC) are very suitable for renewable energy system and have been widely applied in high-voltage direct current (HVDC) transmission system due to its advantages of modularity, low switching frequency and low distortion output voltage waveforms [1][2][3][4][5][6]. However, with the completion and operation of many MMC-HVDC projects, its stability problems have attracted extensive attention.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Analysis of High-Frequency MMC Impedance Considering Different Control Modes and Voltage Feedforward

Yin

Wang

et al. 2020

IEEE Access

Self Cite

View full text Add to dashboard Cite

Sensorless voltage balancing method for modular multilevel converter

Gobburi

Borghate

Meshram

2022

Circuit Theory & Apps

View full text Add to dashboard Cite

Modular multilevel converters (MMCs) have become prominent for high and medium power applications. The phase-disposition pulse width modulation (PDPWM) technique is a carrier-based method that generates good quality output. However, it has the inherent problem of uneven power distribution. Conventionally, this is solved by expensive voltage and current measurements. In this paper, a capacitor voltage balancing method is presented for MMC, which eliminates the need for voltage and current sensors. It also ensures uniform power distribution among the submodules (SMs). In addition, it needs only one carrier per phase, and one PWM reference, for either upper arm or lower arm to produce N + 1 level with N SMs per arm. The capacitor voltage balancing method is analyzed mathematically and verified for the MMC with two-level half-bridge SMs. The same method is also extended to the MMC with three-level flying capacitor SMs. MATLAB/SIMULINK simulations and experimental results on a laboratory prototype are presented to verify the theoretical concepts. K E Y W O R D Smodular multilevel converter (MMC), sensorless voltage balancing, single-carrier PWM, three-level flying capacitor submodule (3L-FCSM)

show abstract

Modular Multilevel Converter With Capacitor Voltage Self-balancing Using Reduced Number of Voltage Sensors

Cited by 17 publications

References 9 publications

A Novel Submodule Voltage Balancing Scheme for Modular Multilevel Cascade Converter—Double-Star Chopper-Cells (MMCC-DSCC) Based STATCOM

A Novel Submodule Voltage Balancing Scheme for Modular Multilevel Cascade Converter—Double-Star Chopper-Cells (MMCC-DSCC) Based STATCOM

Modeling and Analysis of High-Frequency MMC Impedance Considering Different Control Modes and Voltage Feedforward

Sensorless voltage balancing method for modular multilevel converter

Contact Info

Product

Resources

About