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| 乌北-吐鲁番-哈密750kV输电线路工频过电压研究 | |
| 引用本文： | 刘青,李山,范旭华,张增强,陈文涛.乌北-吐鲁番-哈密750kV输电线路工频过电压研究[J].高压电器,2011,47(6):8-12. |
| 作者姓名： | 刘青 李山 范旭华 张增强 陈文涛 |
| 作者单位： | 1. 西安科技大学,西安,710054 2. 新疆电力科学研究院,乌鲁木齐,830000 3. 新疆电力公司,乌鲁木齐,830002 |
| 基金项目： | 陕西省教育厅科研计划资助项目 |
| 摘 要： | 超高压电网的工频过电压是确定系统绝缘水平的重要依据.750 kV输电线路电阻和电感较小、分布电容大,线路较长,工频过电压比一般超高压线路更为严重.笔者以乌北-吐鲁番-哈密750 kV输电系统为背景,利用电磁暂态程序(EMTP)计算了线路的潜供电流、恢复电压,以及各种运行方式下的工频过电压,并对线路两端高抗限制工频过电压... |
| 关 键 词： | 750kV输电线路 工频过电压 潜供电流 恢复电压 |
Investigation to Power Frequency Overvoltages of Wubei-Tulufan-Hami 750 kV Transmission System |
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| LIU Qing,LI Shan,FAN Xu-hua,ZHANG Zeng-qiang,CHEN Wen-tao.Investigation to Power Frequency Overvoltages of Wubei-Tulufan-Hami 750 kV Transmission System[J].High Voltage Apparatus,2011,47(6):8-12. | |
| Authors: | LIU Qing LI Shan FAN Xu-hua ZHANG Zeng-qiang CHEN Wen-tao |
| Abstract: | Power frequency overvoltage is an important index for evaluating the insulation grade of extra high voltage power system.Because of the longer length and the larger distributing capacitance of 750 kV transmission line,the power frequency overvoltage is more serious.In this paper,for the Wubei-Tulufan-Hami 750 kV transmission system,the secondary arc current,the recovery voltage,and the power frequency overvoltages in different conditions are calculated by Electro Magnetic Transient Program(EMTP).The protective effect of shunt reactor is also analyzed.Theoretical analysis and simulation illustrate that the value of neutral reactance is suitable,which ensures the success of single-phase auto-reclosing;and the power frequency overvoltages meet the Chinese regulations after the reactors are installed at both ends of the transmission line. |
| Keywords: | 750 kV transmission line power frequency overvoltage secondary arc current recovery voltage |
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