Voltage Stability and Transient Symmetrical Fault Current Control of Voltage-Controlled MMCs

被引：11

作者：

Li, Yingbiao ^{[1
]}

Guo, Jianbo ^{[1
]}

Wu, Heng ^{[2
]}

Wang, Xiongfei ^{[2
]}

Zhao, Bing ^{[1
]}

Wang, Shanshan ^{[1
]}

Wu, Guanglu ^{[1
]}

机构：

[1] China Elect Power Res Inst, Beijing 100192, Peoples R China

[2] Aalborg Univ, Dept Energy Technol, DK-9220 Aalborg, Denmark

来源：

IEEE TRANSACTIONS ON POWER DELIVERY | 2020年 / 35卷 / 05期

关键词：

Voltage control; Regulators; Fault currents; Feedforward systems; Power system stability; Wind farms; Transient analysis; Modular Multilevel Converter (MMC); voltage control; controller design; fault current; HVDC; DESIGN; CONVERTERS;

D O I：

10.1109/TPWRD.2020.2970247

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper presents a design-oriented analysis on the voltage stability and the transient fault current limitation of voltage-controlled modular multilevel converter (MMC) with L-filters. First, a dual-loop voltage control based on the L-filter plant is systematically designed, where the upper limits of controller parameters to ensure the small-signal stability are identified. Then, considering the transient current limitation during faults, the lower boundaries of inner current controller parameters are derived. Within the region of allowed controller parameters, the optimization is further made to minimize the closed-loop output impedance of MMC, which enhances the output voltage stiffness against the load current disturbance. Lastly, time-domain simulations corroborate the theoretical analysis.

引用

页码：2506 / 2516

页数：11

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