A control and protection system in a loop testing technology for a flexible power electronics substation

Song, Jong-Hwa; Xiang, Wang; Lu, Zhengang; Zhang, Yongzheng; Liu, Haijun; Wang, Xiaofei; Cao, Tianzhi

doi:10.1109/iciea.2018.8398047

Cited by 3 publications

(1 citation statement)

References 6 publications

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“…It can be known from the existing studies that, in the case of a DC fault, compared with HBSM‐MMC, the CDSM‐MMC with fault isolation capability has a higher stability . Moreover, the CDSM‐MMC has been applied in the demonstration project of flexible DC power grid in Zhangbei, China . Therefore, the CDSM‐MMC is employed in this paper as the grid‐connected converter in the PV integration system.…”

Section: Introductionmentioning

confidence: 99%

Fault analysis on DC transmission system of PV generation

Dai

Huang

et al. 2018

Int Trans Electr Energ Syst

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Summary Compared with conventional AC transmission systems of PV generation, its DC counterpart is more resilient for improving the PV utilization. However, in the clamped double submodule‐modular multilevel converter (CDSM‐MMC) and DC/DC converter‐based PV grid‐connection system, pole‐to‐ground and pole‐to‐pole fault characteristics still need investigation. The equivalent model of PV stations and current circuits of the CDSM‐MMC, before and after the fault, are studied first. Secondly, the influence of different connection groups of the converter transformer on the DC fault characteristic and that of DC faults on AC‐side electrical quantities are discussed. Subsequently, development stages of DC faults are divided according to the charging and discharging processes of the CDSM‐MMC and the DC/DC converter, and corresponding equivalent models are established and solved. Finally, the DC transmission system of the PV generation is modeled in Power Systems Computer Aided Design/Electromagnetic Transients including DC to verify the theoretical analysis. The DC fault analysis can provide reference for the subsequent protection system design.

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Section: Introductionmentioning

confidence: 99%