An Improved Traveling-Wave Protection Scheme for LCC-HVDC Transmission Lines
An Improved Traveling-Wave Protection Scheme for LCC-HVDC Transmission Lines
复制标题
LCC-HVDC 输电线路改进的行波保护方案
DOI：
10.1109/tpwrd.2016.2549565
复制
发表时间：
2017-02
影响因子：
4.4
通讯作者：
Liang Yuansheng
中科院分区：
文献类型：
--
作者：
Wu Jiyang;Li Haifeng;Wang Gang;Liang Yuansheng
基于线路换相换流器的高压直流输电（LCC-HVDC）技术发展迅速。但高压直流线路保护的灵敏度和可靠性还有待进一步提高。不同类型的线路故障的分析表明，归一化的电压变化率的波传播的影响，可以更有效地区分内部和外部故障与高的故障电阻。针对行波难以精确求解的问题，提出了一种利用传输线阶跃响应并考虑其频变特性的行波传播计算方法。在此基础上，提出了一种适用于双端LCC-HVDC输电线路的新型行波保护方案。基于EMTDC/PSCAD仿真平台的故障仿真数据和常规TWP的实际非期望跳闸事件的故障记录数据，对所提出的保护方案进行了测试。结果表明，与传统的TWP相比，该TWP方案在不同的运行模式下，可以更可靠和正确地检测高过渡电阻故障。
Line-commutated converter-based-high-voltage direct-current (LCC-HVDC) transmission technology has been developing very rapidly. However, the sensitivity and reliability of HVDC line protection require further improvement. An analysis of different line fault types is conducted to show that the normalized voltage change rate without the influence of wave propagation can more effectively distinguish between internal and external faults with high fault resistances. Owing to the difficulty of obtaining an accurate solution for a traveling wave, a novel traveling-wave propagation calculation method is developed by making use of the step response of a transmission line with consideration for its frequency-dependent characteristics. A novel traveling-wave protection (TWP) scheme for two-terminal LCC-HVDC transmission lines is then proposed based on the developed traveling-wave propagation calculation method and fault analysis results. The proposed protection scheme is tested based on fault simulation data using an EMTDC/PSCAD simulation platform and the fault-recorded data from an actual undesired tripping event of conventional TWP. The results demonstrate that the proposed TWP scheme, compared with conventional TWP, can more reliably and correctly detect faults with high transition resistances under different operation modes.
登录
查看更多内容
DOI：
10.1109/pesgm.2018.8586307
发表时间：
2018-08
期刊：
2018 IEEE Power & Energy Society General Meeting (PESGM)
影响因子：
--
作者：
G. Song;X. Chu;Shuping Gao;X. Kang;Z. Jiao
通讯作者：
G. Song;X. Chu;Shuping Gao;X. Kang;Z. Jiao
影响因子：
4.4
作者：
A. Morched;B. Gustavsen;M. Tartibi
通讯作者：
A. Morched;B. Gustavsen;M. Tartibi
影响因子：
4.4
作者：
Yuansheng Liang;Wang Gang;Haifeng Li
通讯作者：
Yuansheng Liang;Wang Gang;Haifeng Li
影响因子：
4.4
作者：
Xiaolei Liu;A. Osman;O. Malik
通讯作者：
Xiaolei Liu;A. Osman;O. Malik
影响因子：
4.4
作者：
B. Gustavsen;A. Semlyen
通讯作者：
B. Gustavsen;A. Semlyen