Abstract: Because of special structure of half wavelength transmission line (HWLL), there is a mechanism of power frequency resonance excitation for HWLL secondary arc during single-phase reclosing, in addition to coupling between circuits as conventional. Concretely, when a fault occurs in middle section of HWLL, the natural frequency of fault phase in stage of secondary arc current is close or even equal to power frequency. When a fault occurs in a terminal of HWLL, its natural frequency in stage of voltage recovery is close to power frequency. Therefore, the secondary arc current and recovery voltage at the fault positions of power frequency resonance are obviously higher than those in other fault positions. Based on above theory, this paper studied the characteristics of steady and transient states and distribution of secondary arc current and recovery voltage for UHV HWLL, considering factors such as arc resistance, transmission power, system network structure, etc. These interpret its many unique properties different from conventional transmission lines. Then, by undermining resonance condition, a configuration method of high speed grounding switch (HSGS) along HWLL and action strategy of three groups of HSGS near the fault position are put forward. The control scheme of seven groups of HSGS along UHV HWLL is determined, meeting requirement of 1 s reclosing time. Thus, the secondary arc theory of HWLL may be further completed, and HSGS control scheme can be optimized.
张媛媛, 王毅, 韩彬, 宋修友, 班连庚, 项祖涛, 宋瑞华. 半波长输电线路潜供电弧工频谐振作用机理及优化控制方案[J]. 电网技术, 2018, 42(7): 2073-2080.
ZHANG Yuanyuan, WANG Yi, HAN Bin, SONG Xiuyou, BAN Liangeng, XIANG Zutao, SONG Ruihua. Power Frequency Resonance Mechanism of Secondary Arc and Its Optimal Control Scheme for Half-Wave Length Transmission Lines. POWER SYSTEM TECHNOLOGY, 2018, 42(7): 2073-2080.
 Hubert F J, Gent M R.Half-wavelength power transmission lines[J].IEEE Transactions on Power Apparatus and Systems,1965,84(10):965-974.  Prabhakara F S, Parthasarathy K, Ramachandra Rao H N.Analysis of natural half-wave-length power transmission lines[J].IEEE Transactions on Power Apparatus and Systems,1969,88(12):1787-1794.  Prabhakara F S,Parthasarathy K,Ramachandra Rao H N.Performance of tuned half-wave-length power transmission lines[J].IEEE Transactions on Power Apparatus and Systems,1969,88(12):1795-1802.  lliceto F, Cinieri E.Analysis of half-wave length transmission lines with simulation of corona losses[J].IEEE Transactions on Power Delivery,1988,3(4):2081-2091.  Gatta F M, Lliceto F.Analysis of some operation problems of half-wave length transmission lines[C]//AFRICON '92 Proceedings,1992,59-64.  Aredes M, Portela C, Van Emmerik E L,et al.Static series compensators applied to very long distance transmission lines[J].Electrical Engineering,2004,86(2):69-76.  Dias R,Santos Jr G,Aredes M.Analysis of a series tap for half-wavelength transmission lines using active filters[C]//IEEE 36 th Power Electronics Specialists Conference,2005,1894-1900.  Maria Cristina Tavares, Portela Calos M.Half-Wave length line energization case test-proposition of a real test[C]//International Conference on High Voltage Engineering and Application.Chongqing,China,2008:261-264.  刘振亚. 特高压电网[M].北京:中国经济出版社,2005.  刘振亚. 中国特高压交流输电技术创新[J].电网技术,2013,37(3):1-8. Liu Zhenya.Innovation of UHV AC transmission technology in China[J].Power System Technology,2013,37(3):1-8(in Chinese).  舒印彪,张文亮.特高压输电若干关键技术研究[J].中国电机工程学报,2007,27(31):1-6. Shu Yinbiao,Zhang Wenliang.Research of key technologies for UHV transmission[J].Proceedings of the CSEE,2007,27(31):1-6(in Chinese).  林集明,郑健超.特高压半波长交流输电技术经济可行性初步研究总结报告[R].北京:中国电力科学研究院,2010.  梁旭明. 半波长交流输电技术研究及应用展望[J].智能电网,2015,3(12):1091-1096. Liang Xuming.Technology research and application prospect of half-wavelength alternating current transmission[J].Smart Grid,2015,3(12):1091-1096(in Chinese).  韩彬,林集明,班连庚,等.特高压半波长交流输电系统电磁暂态特性分析[J].电网技术,2011,35(9):22-27. Han Bin,Lin Jiming,Ban Liangeng,et al.Analysis of electromagnetic transient characteristics of UHV semi-wavelength AC transmission system[J].Power System Technology,2011,35(9):22-27(in Chinese).  孙秋芹,汪沨,刘洋,等.特高压输电线路潜供电流的暂态特性研究[J].电工技术学报,2016,31(3):97-103. Sun Qiuqin,Wang Feng,Liu Yang,et al.Study on transient characteristics of latent potential current in UHV transmission lines[J].Journal of Industrial Technology,2016,31(3):97-103(in Chinese).  孙秋芹,李庆民,陈全,等.特高压半波长输电线路潜供电弧低压模拟实验研究[J].高电压技术,2012,38(2):350-358. Sun Qiuqin,Li Qingmin,Chen Quan,et al.Experimental study on low-voltage simulation of submersible arcs for UHV half-wavelength transmission lines[J].High Voltage Technology,2012,38(2):350-358 (in Chinese).  秦晓辉,张志强,徐征雄,等.基于准稳态模型的特高压半波长交流输电系统稳态特性与暂态稳定研究[J].中国电机工程学报,2011,31(31):66-76. Qin Xiaohui,Zhang Zhiqiang,Xu Zhengxiong,et al.Stability and transient stability of UHV half-wavelength AC transmission system based on quasi-steady-state model[J].Proceeding of the CSEE,2011,31(31):66-76(in Chinese).