DC Capacitor Voltage Balance Control Method for High-Power Single-Phase Cascaded H-Bridge Rectifier to Extend the Regulation Range

Wang, Chenchen; Wang, Xin; Dong, Zhiqiang; Gu, Changbin

doi:10.1109/tte.2020.3039939

Cited by 8 publications

(3 citation statements)

References 24 publications

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“…The longer settling time of the dc‐side voltage is when the load is suddenly changed, the more severe potential damage to the CHBR system will be. Therefore, quick response is an important index to evaluate the control performance of a VBC strategy [2]. In [4], the calculation of compensation duty cycle based on the dynamic references design is adopted to improve the dynamic performance.…”

Section: Introductionmentioning

confidence: 99%

“…It is widely researched in high‐power applications including renewable energy resources, power transfer networks, high‐speed train [1]. Although many novel multilevel converter's topologies were proposed, single‐phase cascaded H‐bridge rectifier (CHBR) is the most popular technical choice due to its modularization and extendibility [2]. Unfortunately, since the CHBR is directly physically connected to the power supply network, it does not have the isolation and filtering effects of the traditional line frequency transformers [3].…”

Section: Introductionmentioning

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%

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

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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.

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Section: Introductionmentioning

confidence: 99%