摘要
随着多端直流系统在电力网络中的应用引起了广泛关注,直流断路器的开断能力问题逐渐凸显,成为限制多端直流系统进一步发展的重要因素。为解决这一技术难题,提出了将超导限流器应用于多端直流系统的方案。在PSCAD平台上搭建了电阻型超导限流器的仿真模型,并通过一系列的物理实验对仿真模型的准确性进行校验,进而将此模型应用于一个典型的三端直流输电系统,研究了超导限流器对于网络中直流侧不同类型及不同地点的故障短路电流的限制作用。仿真研究表明,超导限流器具有明显的限流作用,同时不会影响多端直流系统的正常运行。
With the extensive application of VSC-MTDC （voltage source converter-based multi-terminal direct current） power systems, large DC fault current becomes an important issue due to the bottleneck of DC breaker＇s capacity. This paper presents an application of SFCL（superconducting fault current limiter） in VSC-MTDC system. A numerical model of SFCL is built in PSCAD and the accuracy of model is verified by a series of experiments. SFCLs are applied in a typical three-terminal HVDC system to study the current limiting effect with different kinds of fault types and fault positions. The simulation results show that the fault current can be limited effectively without affecting the normal operation of the system.
出处
《电网技术》
EI
CSCD
北大核心
2015年第4期983-988,共6页
Power System Technology
作者简介
Liu Xu was born in 1990. He received the B.S. degree in electrical engineering from Shanghai Jiao Tong University, Shanghai, China. Now he is currently pursuing the master degree in electrical engineering in Shanghai Jiao Tong University, Shanghai, China. His main fields of interest include the power system simulation and the application of SFCL in girds. E-mail： liuxutheboyok@ 126.com.
