Fault Characteristics and Protection Scheme of the MMC-UPFC under Different Grounding Design

International Conference on Sustainable Energy Engineering

能源学;经济学

Zheng, Tao^1 ; Wang, Ketan^1 ; Wu, Dan^2 ; Qi, Huanhuan^3

North China Electric Power University, Changping District, Beijing

102206, China^1

NARI Technology Co. Ltd., Nanjing

211106, China^2

State Grid Smart Grid Research Institute, Changping District, Beijing

102211, China^3

关键词: Capacity transmission;    Demonstration project;    Fault characteristics;    High voltage;    Modular multi-level converters;    Protection schemes;    Resistance grounding;    Unified power flow controllers;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/73/1/012011/pdf
DOI  :  10.1088/1755-1315/73/1/012011

来源: IOP

【 摘 要 】

The Unified Power Flow Controller (UPFC) based on Modular Multilevel Converter (MMC) is more suitable for high-voltage and large-capacity transmission fields. According to the actual needs of demonstration project, 3 grounding proposals were brought out and the effect of different grounding proposals to the fault characteristics and protection schemes is analyzed in detail. The conclusion that only parallel valve side star connected large resistance grounding is more advantageous in MMC-UPFC was derived.