Adaptability Analysis of Fault Supervision System for Long Electrode Line of UHVDC
Teng Yufei1, Li Xiaopeng1, Lin Sheng2, Li Shilong1
1. State Grid Sichuan Electric Power Research Institute Chengdu 610072 China; 2. School of Electrical Engineering Southwest Jiaotong University Chengdu 611756 China
Abstract：Based on the distributed parameter model, high frequency fault impedance characteristic of long grounding electrode line of ultra high voltage direct current (UHVDC) is researched. The expression of high frequency fault impedance is deduced in different fault types. For metallic faults, imaginary part of measured impedance changes periodicity with fault position when the length of grounding electrode line is longer than the half wavelength of injected signal. Especially when the length of grounding electrode line is integer multiple of half wavelength of injected signal, metallic faults at some special position cannot be identified. To improve the reliability of impedance monitoring device, a strategy based on frequency selection of injected signal is proposed. According to the measured parameter, make the wavelength of injected signal have a great difference with length of grounding electrode line. The reliability of the research is demonstrated by PSCAD.
滕予非, 李小鹏, 林圣, 李世龙. 特高压直流系统接地极线路阻抗监视系统适应性研究[J]. 电工技术学报, 2019, 34(19): 4154-4161.
Teng Yufei, Li Xiaopeng, Lin Sheng, Li Shilong. Adaptability Analysis of Fault Supervision System for Long Electrode Line of UHVDC. Transactions of China Electrotechnical Society, 2019, 34(19): 4154-4161.
[1] 李兴源, 赵睿, 刘天琪, 等. 传统高压直流输电系统稳定性分析和控制综述[J]. 电工技术学报, 2013, 28(10): 288-300. Li Xingyuan, Zhao Rui, Liu Tianqi, et al.Research of conventional high voltage direct current transmission system stability analysis and control[J]. Transactions of China Electrotechnical Society, 2013, 28(10): 288-300. [2] 刘振亚, 张启平, 董存, 等. 通过特高压直流实现大型能源基地风、光、火电力大规模高效率安全外送研究[J]. 中国电机工程学报, 2014, 34(16): 2513-2522. Liu Zhenya, Zhang Qiping, Dong Cun, et al.Efficient and security transmission of wind, photovoltaic and thermal power of large-scale energy resource bases through UHVDC projects[J]. Proceedings of the CSEE, 2014, 34(16): 2513-2522. [3] Hammons T J, Woodford D, Loughtan M, et al.Role of HVDC transmission in future energy development[J]. IEEE Power Engineering Review, 2000, 20(2): 10-25. [4] Chen Fan, Zhang Bo, He Jinliang.Influence of coke bed on HVDC grounding electrode heat dissipation[J]. IEEE Transactions on Magnetics, 2008, 44(6): 826-829. [5] 孙帮新, 陈辉祥. 高压直流输电共用接地极技术研究[J]. 高电压技术, 2006, 32(12): 150-153. Sun Bangxin, Chen Huixiang.Common grounding technique used in the HVDC[J]. High Voltage Engineering, 2006, 32(12): 150-153. [6] 刘守豹, 皇甫成, 余世峰, 等. 特高压直流接地极线路过电压研究[J] .高电压技术, 2018, 44(7): 2410-2417. Liu Shoubao, Huang Fucheng, Yu Shifeng, et al.Over voltage of grounding electrode lines in ultra-HVDC[J]. High Voltage Engineering, 2018, 44(7): 2410-2417. [7] Bolduc L, Granger M, Saintonge J, et al.Development of a DC current blocking device for transformer neutrals[J]. IEEE Transactions on Power Delivery, 2005, 20(1): 163-168. [8] 潘超, 王泽忠, 李海龙, 等. 基于瞬态场路耦合模型的变压器直流偏磁计算[J]. 电工技术学报, 2013, 28(5): 174-181. Pan Chao, Wang Zezhong, Li Hailong, et al.DC-bias calculation for single phase transformers based on transient field-circuit coupled model[J]. Transactions of China Electrotechnical Society, 2013, 28(5): 174-181. [9] 朱清代, 张纯, 石玉东, 等. 直流输电单极故障引发接地极线路击穿的定位方法研究[J]. 电力系统保护与控制, 2018, 46(12): 64-70. Zhu Qingdai, Zhang Chun, Shi Yudong, et al.Research on location method of grounding electrode line fault caused by unipolar fault of HVDC transmission system[J]. Power System Protection and Control, 2018, 46(12): 64-70. [10] 杨光, 朱韬析, 魏丽君, 等. 直流输电系统接地极线路故障研究[J]. 电力系统保护与控制, 2009, 37(21): 45-49. Yang Guang, Zhu Taoxi, Wei Lijun, et al.Research on the faults of electrode line of HVDC transmission system in monopolar ground return operation[J]. Power System Protection and Control, 2009, 37(21): 45-49. [11] 成敬周, 徐政. 直流输电共用接地极线方式的保护特性[J]. 电力系统自动化, 2012, 36(14): 77-82. Cheng Jingzhou, Xu Zheng.Protection characteristics of HVDC common grounding electrode lines[J]. Automation of Electric Power Systems, 2012, 36(14): 77-82. [12] 张纯, 滕予非. 特高压直流输电系统接地极线路保护性能分析[J]. 四川电力技术, 2017, 40(1): 84-88. Zhang Chun, Teng Yufei.Protection characteristics of UHVDC grounding electrode lines[J]. Sichuan Electric Power Technology, 2017, 40(1): 84-88. [13] Gunnar Asplund. Electrode line protection: US, 5117323 [P].1992-05-26. [14] 滕予非, 王鱼, 焦在滨, 等. 特高压直流输电系统接地极引线阻抗监视策略[J]. 电工技术学报, 2016, 31(11): 157-164. Teng Yufei, Wang Yu, Jiao Zaibin, et al.Impedance monitoring scheme for ground electrode line of ultra high voltage DC transmission system[J]. Transactions of China Electrotechnical Society, 2016, 31(11): 157-164. [15] 滕予非, 汤涌, 周波, 等. 基于高频电压突变量的特高压直流输电系统接地极引线故障监测方法[J]. 高电压技术, 2016, 42(1): 72-78. Teng Yufei, Tang Yong, Zhou Bo, et al.Monitoring scheme for UHVDC ground electrode line fault on the basis of high-frequency voltage variation[J]. High Voltage Engineering, 2016, 42(1): 72-78. [16] Teng Yufei, Li Xiaopeng, Huang Qi, et al.A novel high-frequency voltage standing-wave ratio-based grounding electrode line fault supervision in ultra-high voltage DC transmission systems[J]. Energies, 2017, 10(3): 1-10.
2019, Vol. 34 
