SHORT-CIRCUIT CURRENT CALCULATION METHOD FOR AC/DC POWER TRANSMISSION SYSTEMS WITH MMC

Gao Yiying; Han Yi; Liu Xinyu; Xu Zheng; Zhang Shang; Zhang Yuhong

doi:10.19912/j.0254-0096.tynxb.2021-0009

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (8) : 17-23. DOI: 10.19912/j.0254-0096.tynxb.2021-0009

SHORT-CIRCUIT CURRENT CALCULATION METHOD FOR AC/DC POWER TRANSMISSION SYSTEMS WITH MMC

Gao Yiying¹, Han Yi¹, Liu Xinyu², Xu Zheng², Zhang Shang¹, Zhang Yuhong¹

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Abstract

Based on the operating principles and transient characteristics of MMC （Modular Multilevel Converter）, by comparing the short-circuit current of MMC and synchronous generators, and the short-circuit current calculation model of MMC is proposed. After analyzing the mechanism of MMC participating in the calculation of AC system short-circuit current, based on superposition principle, an iterative algorithm for short-circuit current of power grid with MMC is proposed. Finally, based on PSCAD/EMTDC, the effectiveness of the proposed calculation method is verified.

Key words

modular multilevel converter / short circuit currents / transient characteristics / AC/DC power transmission systems / current source / iterative algorithm

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Gao Yiying, Han Yi, Liu Xinyu, Xu Zheng, Zhang Shang, Zhang Yuhong. SHORT-CIRCUIT CURRENT CALCULATION METHOD FOR AC/DC POWER TRANSMISSION SYSTEMS WITH MMC[J]. Acta Energiae Solaris Sinica. 2022, 43(8): 17-23 https://doi.org/10.19912/j.0254-0096.tynxb.2021-0009

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