| 特高压输电线甩负荷引起的过电压叠加及其防护 |
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| 引用本文： | 徐陆宇,张艳霞,薛士敏.特高压输电线甩负荷引起的过电压叠加及其防护[J].中国电力,2011,44(10):6-10. |
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| 作者姓名： | 徐陆宇 张艳霞 薛士敏 |
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| 作者单位： | 天津大学电力系统仿真控制教育部重点实验室,天津,300072 |
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| 基金项目： | 高等学校博士学科点专项科研基金——新教师基金资助项目(20100032120074); 天津大学自主创新基金资助项目(1002220) |
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| 摘 要： | 为了分析特高压系统甩负荷时线路过压情况,基于发电机dq0方程和10阶链型回路的高精度架空线路模型,建立差分方程,对特高压长距离输电线突然甩负荷引起的操作过电压情况以及自励磁与操作过电压叠加的情况进行了分析和数字仿真,通过对比2种情况.发现叠加过电压的严重性大于单纯操作过电压提出并研究了利用金属氧化物避雷器来限制这种叠加过电压的方法.利用数字仿真证明了这种措施的可行性。仿真结果表明,金属氧化物避雷器能够将叠加过电压限制在安全范围内。
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| 关 键 词： | 特高压输电 操作过电压 自励磁过电压 避雷器 数字仿真 |
Superposition of overvoltage caused by load rejection of UHV transmission line and preventive measures |
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| XU Lu-yu,ZHANG Yan-xia,XUE Shi-min.Superposition of overvoltage caused by load rejection of UHV transmission line and preventive measures[J].Electric Power,2011,44(10):6-10. |
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| Authors: | XU Lu-yu ZHANG Yan-xia XUE Shi-min |
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| Affiliation: | XU Lu-yu,ZHANG Yan-xia,XUE Shi-min (Key Laboratory of Power System Simulation and Control of Ministry of Education,Tianjin University,Tianjin 300072,China ) |
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| Abstract: | Based on the dq0 generator equation and the high precise ten-order-chain-circuit transmission line model,differential equations are established to analyze the UHV system load rejection overvoltage.The individual switching overvoltage and the superposition of switching overvoltage and self-excitation overvoltage by sudden load rejection of the UHV long distance transmission line are analyzed and simulated.The comparison result shows that the superposition overvoltage is more severe than individual switching ... |
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| Keywords: | UHV switching overvoltage self-excited overvoltage MOA digital simulation |
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