Comparison and analysis on common modulation strategies for the cascaded multilevel STATCOM

Zang, Chunyan; Pei, Zingway; He, Junjia; Guo, Ting; Zhu, Jianhui; Sun, Wei

doi:10.1109/peds.2009.5385755

Cited by 14 publications

(9 citation statements)

References 6 publications

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“…Meanwhile, the voltage-balancing control contains the overall voltage control of per-phase cluster and individual-balancing control. As the circulating current for cluster-balancing control can be calculated by (14), there is no need to add three PI controllers for cluster-balancing control [28]. The proposed control system is simplified.…”

Section: Control Methods For Svgmentioning

confidence: 99%

“…In [11], a systematic classification for multi‐level cascaded converters was proposed by Akagi. The three‐phase cascaded SVG can adopt two kinds of typical topologies, in which H‐bridge cells are constituted in the form of single‐star bridge‐cells (SSBC) [12, 13] or single‐delta bridge‐cells [5, 14]. The delta‐connected SVG bears line voltage for per‐phase cluster, and it is easy to implement individual phase control and has the ability of negative‐sequence compensation.…”

Section: Introductionmentioning

confidence: 99%

“…In [4], the current reference detection method based on i p – i q algorithm was proposed, which can calculate the instantaneous reactive and negative‐sequence currents to enhance the response speed. In [6, 13, 14], the voltage and current control diagram based on synchronous dp frame was proposed, which can improved the dynamic control performance of cascaded SVG. As SVG is composed of three clusters and each cluster is cascaded by H‐bridge cells, the voltage‐balancing control of each cluster and each H‐bridge cells are important for the stable operation of SVG.…”

Section: Introductionmentioning

confidence: 99%

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Derivation of zero‐sequence circulating current and the compensation of delta‐connected static var generators for unbalanced load

Luo

Xiong³

et al. 2016

IET Power Electronics

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Cascaded static var generators (SVG) with delta-configuration is discussed for a compensation of reactive, negative-sequence and harmonic currents. According to phasor analysis of negative-sequence current compensation, the role of zero-sequence circulating current for power balance is analysed. According to power analysis, the analytical expressions of zero-sequence circulating current and 2nd frequency ripples of dc-link voltages are derived. On the basis of this, the phase-current reference detection and the simplified control method of SVG for negative-sequence current compensation are proposed, which is concise and can achieve power balance of three-phase clusters by superimposing a zero-sequence circulating current without additional controllers. Finally, the simulation and experimental results have effectively verified the proposed method.

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Section: Control Methods For Svgmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Derivation of zero‐sequence circulating current and the compensation of delta‐connected static var generators for unbalanced load

Luo

Xiong³

et al. 2016

IET Power Electronics

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“…It is easy to realize and its calculation speed is fast even under a very high level number. This method not only makes it possible to achieve higher switching frequency equivalent effect at a lower switching frequency, but also effectively reduces the distortion of the output voltage [10]. In this paper, 180°/n mode PSPWM strategy [11] is used for the cascaded multilevel STATCOM.…”

Section: Cascaded Multilevel Statcommentioning

confidence: 99%

“…(12) According to equation (7), (10) and (12), the increased DC link voltage can be calculated as follows:…”

Section: (2) Augmentation Of the Output Voltage In Fault Phasementioning

confidence: 99%

Seamless self-healing control strategy for cascaded multilevel STATCOM

Xiong

Zhuo

et al. 2012

2012 IEEE International Symposium on Industrial Electronics

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To improve the reliability of the cascaded multilevel STATCOM, this paper proposes a seamless self-healing scheme that can recover the STATCOM to its normal operation after the failed H-bridge units are bypassed. First the operating principle for seamless self healing is analyzed. Then based on the principle, the control strategy, including adjustment of the trigger pulses and augmentation of the output voltage in fault phase, is developed to ensure that the reactive power compensation capacity and the output voltage waveform quality is not affected by the fault. Simulation results are provided to verify the effectiveness of the proposed scheme.

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An Improved Phase Shift Modulation Method for Cascade Active Power Filter with Low Switching Frequency

Gao

Jiang

Junling

2011

Advanced Electrical and Electronics Engineering

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Comparison and analysis on common modulation strategies for the cascaded multilevel STATCOM

Cited by 14 publications

References 6 publications

Derivation of zero‐sequence circulating current and the compensation of delta‐connected static var generators for unbalanced load

Derivation of zero‐sequence circulating current and the compensation of delta‐connected static var generators for unbalanced load

Seamless self-healing control strategy for cascaded multilevel STATCOM

An Improved Phase Shift Modulation Method for Cascade Active Power Filter with Low Switching Frequency

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