A novel voltage balance method for cascaded H-bridge rectifier

Xinghua, Tao; Sun, Mingxuan

doi:10.1109/vppc.2010.5729222

Cited by 5 publications

(9 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to (17), it is concluded that the zero steady-state error by the modified DPC method is obtained. Moreover, compared with the control structure of the conventional PI-based DPC [24] and PI-based VOC [4], the coordinate transformation is eliminated.…”

Section: Modified Direct Power Controlmentioning

confidence: 99%

“…Various VBC approaches have also been developed to maintain the dc‐side capacitor voltages balancing, including the modulation‐based strategies [13, 14] and the duty cycle compensation methods [1, 2, 4–7, 10, 12, 15–19]. The modulation‐based methods are attractive and perform well for voltage balancing [13, 14].…”

Section: Introductionmentioning

confidence: 99%

“…However, the theoretical analysis of the compensation duty cycle is not given in detail. To solve this problem, the relationship between the difference of the dc‐side voltage and the compensation duty cycle is discussed in [19]. These aforesaid PI‐based methods are popular to apply for practical applications, but they suffer from unsatisfactory dynamic performance.…”

Section: Introductionmentioning

confidence: 99%

“…By contrast, the duty cycle compensation approach has attracted much attention since it can be easily implemented. Very simple methods based on PI control method are proposed in [15][16][17][18]. However, the theoretical analysis of the compensation duty cycle is not given in detail.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A whole control strategy for cascaded H‐bridge rectifiers under distorted grid voltage and unbalanced load

Liu

Song

et al. 2023

IET Power Electronics

View full text Add to dashboard Cite

Control for single‐phase cascaded H‐bridge rectifier (CHBR) under distorted grid voltage is seldom discussed in the existing control methods; a modified direct power control (DPC) scheme is therefore proposed in this paper. A simple power control structure with proportional‐integral control method is first presented, which can discard phase‐locked loop (PLL) and coordinate transformation. Then, an improved fictitious orthogonal algorithm is proposed to provide a better anti‐disturbance ability compared with the traditional second‐order generalized integrator (SOGI). Since the orthogonal component of the grid current runs concurrently with the power reference, it offers an excellent dynamic performance in inner loop. On the other hand, a voltage balancing control (VBC) model by the relationship between the difference of dc‐side voltage square and that of power is established. On this basis, an internal model VBC (IM‐VBC) method is provided to reduce the parameter tuning complexity. With this method, the dynamic performance of voltage balancing on the dc side is improved. Finally, several test results on hardware‐in‐the‐loop (HIL) and scale‐down platform are demonstrated, which validate the effectiveness and superiority of the proposed control strategy.

show abstract

Section: Modified Direct Power Controlmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A whole control strategy for cascaded H‐bridge rectifiers under distorted grid voltage and unbalanced load

Liu

Song

et al. 2023

IET Power Electronics

View full text Add to dashboard Cite

show abstract

“…1 are used to replace the DC-DC converter in PET. Because many reasons such as different leakage inductance of high frequency transformer and different voltage drop of switching device [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29], there is an imbalanced voltage problem for CHBR. Imbalanced voltage increase stress on switching device and switching loss or even causing the entire system to break down [11][12].…”

Section: Introductionmentioning

confidence: 99%

Novel Voltage Balance Strategy for a Cascade H-Bridge with a Wide Stable Operating Region and a Low Input Current THD

Jin,

Kondo

2024

IEEJ Journal IA

View full text Add to dashboard Cite

Cascade H-bridge (CHB) converters show promising potential across various applications, such as power electronic transformers and static synchronous compensator, because of their advantages such as modularity and the ability to generate multilevel output voltage. However, the DC-link voltage of each CHB module needs to be controlled individually. Imbalanced voltage is, therefore, a serious problem for the stable operation of CHB. In this study, we developed a hybrid modulation strategy for a single-phase CHB rectifier (CHBR) in a power electronic transformer used in the traction industry. In the proposed average voltage selected (AVS) method, the average DC-link voltage value is calculated. All modules whose DC-link voltage is lower than the average are charged, and all modules whose voltage is higher than average are discharged. Furthermore, a duty ratio saturation compensation is used. Compared with previous hybrid modulation strategy with a wide stable operation region, the AVS method can decrease the input current total harmonic distortion (THD) and DC-link voltage THD without sacrificing the stable operation region and switching loss. The effectiveness of the AVS method was verified by simulation and experiments.

show abstract

An improved voltage balancing control method for single‐phase cascaded H‐bridge rectifier considering grid‐side DC offset

Chen

et al. 2022

IET Power Electronics

View full text Add to dashboard Cite

An improved voltage balancing control (VBC) method is proposed in this paper to optimize control performance of single‐phase cascaded H‐bridge rectifier (CHBR). Firstly, the steady‐state error of the VBC method based on capacitor energy estimation is analyzed. An error compensation method is therefore presented to eliminate the steady‐state error. The proposed method delivers fast dynamic performance without steady‐state error. In addition, it requires less parameter tuning than traditional proportional‐integral‐based (PI‐based) VBC methods, and coupling effect between the upper‐ and the lower layer control system is also eliminated in both dynamic and steady state. Moreover, a mixed second‐ and third‐order generalized integrator (MSTOGI) method is applied to suppress the dc offset of grid voltage, which may occur in the process of sampling or conversion. Finally, a physical experiment platform is developed and a series of comparisons are given to verify the feasibility of the proposed method.

show abstract

A novel voltage balance method for cascaded H-bridge rectifier

Cited by 5 publications

References 15 publications

A whole control strategy for cascaded H‐bridge rectifiers under distorted grid voltage and unbalanced load

A whole control strategy for cascaded H‐bridge rectifiers under distorted grid voltage and unbalanced load

Novel Voltage Balance Strategy for a Cascade H-Bridge with a Wide Stable Operating Region and a Low Input Current THD

An improved voltage balancing control method for single‐phase cascaded H‐bridge rectifier considering grid‐side DC offset

Contact Info

Product

Resources

About