固相气流切除雷击短路故障下电力系统暂态稳定性分析

王巨丰1,2,3 周鑫1,2,3 李籽剑1,2,3 周勇军1,2,3 韩力1,2,3

(1.广西大学电气工程学院, 广西壮族自治区南宁市 530004)
(2.广西输配网防雷工程技术研究中心 (广西大学) , 广西壮族自治区南宁市 530004)
(3.南宁超伏科技有限公司, 广西壮族自治区南宁市 530004)

【摘要】随着我国电力负荷的不断增加, 各种新能源、新技术的不断投运, 电力系统的稳定性问题也愈发的复杂。系统在受到大扰动后, 断路器难以在极限切除时间和极限切除角内切除故障。雷击引起短路故障是系统发生大扰动的原因之一, 然而当线路安装固相气流灭弧防雷设备之后, 可通过快速灭弧方式切断短路故障。为分析固相气流灭弧防雷间隙切除雷击短路故障对电力系统暂态稳定性的影响, 利用固相气流灭弧防雷间隙改进后的Mayer电弧模型作为短路点的等效接地电阻, 将该模型与传统发电机转子状态方程结合, 求解了两者耦合后的微分方程, 并详细介绍了该方程基于改进欧拉法在MATLAB仿真环境中的程序设计, 求解出功角与相对角速度的摇摆曲线, 并与传统的断路器切除方式对比, 得出固相气流灭弧防雷间隙切除雷击短路故障可大幅度提高了电力系统暂态稳定性。

【关键词】 电力系统暂态稳定性; 雷击短路故障; 改进Mayer电弧模型; 固相气流灭弧防雷间隙;

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This Article

ISSN:1007-3612

CN: 11-3785/G8

Vol 38, No. 05, Pages 8-13

May 2015

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Article Outline

摘要

  • 0 引言
  • 1 改进Mayer电弧模型及求解思路
  • 2 简单电力系统的功角特性分析
  • 3 发电机转子的状态方程与求解思路
  • 4 程序设计与结果分析
  • 5 结论
  • 参考文献