±800kV平波电抗器的雷电过电压耐受  

Lightning overvoltage withstand of a ±800 kV smoothing reactor

作　　者：陈水明[1] 杨鹏程[1] 耿屹楠[1] 吴玉坤[2] 

机构地区：[1]清华大学电机工程与应用电子技术系,电力系统及发电设备控制和仿真国家重点实验室,北京100084 [2]北京电力设备总厂,北京102401

出　　处：《清华大学学报（自然科学版）》2010年第1期23-26,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(50737001)

摘　　要：±800 kV平波电抗器是±800 kV高压直流(HVDC)输电直流侧的必需元件。在制造电抗器前,需要对电抗器的过电压耐受进行评估,保证匝间电压小于绝缘值。该文在求解电抗器分布参数的基础上,用链型回路等值电抗器,采用PSCAD/EMTDC程序求解在雷电冲击下的匝间电压。计算表明:电抗器外圈匝间过电压值大于内圈,外圈首匝匝间过电压最大,对比雷电全波冲击和雷电截波冲击时的电抗器匝间过电压,后者更为严重。± 800 kV smoothing reactors are necessary in ± 800 kV high voltage direct current （HVDC） transmission. Before manufacturing the reactor, the lightning overvoltage withstand ability of the reactor should be evaluated to ensure that the voltage between each pair of coils is less than the critical value. The voltage distribution in such a reactor was analyzed with PSCAD/EMTDC. The results show that the external coils＇ over-voltage between the two first coils is larger than between the internal coils with higher voltages during cut-off lightning than with the full lightning.

关 键 词：±800kV平波电抗器 分布参数电路 雷电过电压耐受 雷电全波 雷电截波 

分 类 号：TM721.1[电气工程—电力系统及自动化]