VSC-HVDC系统保护策略的研究  

Study on the protection strategy in VSC-HVDC system

作　　者：党常亮[1] 

机构地区：[1]宝鸡文理学院电子电气工程系,陕西宝鸡721016

出　　处：《宝鸡文理学院学报（自然科学版）》2013年第1期47-50,共4页Journal of Baoji University of Arts and Sciences(Natural Science Edition)

摘　　要：目的对基于电压源换流器的高压直流输电系统(VSC-HVDC)的保护策略进行分析,为保护装置的研究提供依据。方法通过在PSCAD/EMTDC软件环境下对系统中常见的两大类故障——破坏性故障和非破坏性故障进行仿真,从结果中提取了故障特征,并据此提出相应的保护策略。结果 1)对于破坏性故障,由于控制失效,只能进行闭锁跳闸,并在适当位置安装熔断器;2)对于非破坏性故障,对故障端功率进行"软关断"。结论仿真实验结果表明,上述两种保护策略是有效可行的。Objective--To analyze the protection strategy of VSC-HVDC system, and provide the basis for the research into protection device. Methods--The simulating model for VSC-HVDC is established under the environment of PSCAD/EMTDC, and two common faults-destructive malfunctions and non-destructive malfunctions-in voltage source converter are discussed. What＇s more, fault characteristics are extracted and relevant protection strategy is proposed. Results--I） For destructive faults, the impulse signal must be blocked and fuse should be erected; 2） As for non-destructive faults, ＂ soft turn-off＂ operation should be carried out. Conclusion--Simulation results testify the effectiveness of the protection strategy.

关 键 词：电压源换流器 高压直流输电 故障特征 保护策略 

分 类 号：TM77[电气工程—电力系统及自动化]