@Article{ee.2022.023304,
AUTHOR = {Dahai Zhang, Chuanjian Wu, Jinghan He},
TITLE = {A Single-Ended Protection Principle for LCC-VSC-MTDC System with High Resistance Fault Tolerance},
JOURNAL = {Energy Engineering},
VOLUME = {120},
YEAR = {2023},
NUMBER = {1},
PAGES = {1--21},
URL = {http://www.techscience.com/energy/v120n1/50143},
ISSN = {1546-0118},
ABSTRACT = {Line-commutated converter-voltage source converter (LCC-VSC) power transmission technology does not have the problem of communication failure very usually. It therefore can support the long-distance, long-capacity transmission of electric energy. However, factors such as topology, control strategy, and short-circuit capacities make the traditional protection principles not fully applicable to LCC-VSC hybrid transmission systems. To enhance the reliability of hybrid DC systems, a single-ended principle based on transmission coefficients is proposed and produced. First, the equivalent circuit of the LCC-VSC hybrid DC system is analyzed and the expression of the first traveling wave is deduced accordingly. Then, the concept of multi-frequency transmission coefficients is proposed by analyzing the amplitude-frequency, and the characteristics of each element. Finally, the LCC-VSCDC system model is built to verify the reliability and superiority of the principle itself. Theoretical analysis and experimental verification show that the principle has strong interference resistance.},
DOI = {10.32604/ee.2022.023304}
}