磁暴对高压输电线干扰规律及其对电力系统电磁暂态的影响

发布时间：2018-04-16 00:07

本文选题：磁暴 + 耦合干扰　；参考：《高电压技术》2016年06期

【摘要】：为研究地磁暴对高压输电线的耦合干扰及电力系统电磁暂态的影响,首先建立了空间时变磁场与输电线的耦合模型,以场的方式分析磁暴与输电线间的耦合干扰关系;其次,用不同大小的直流电源来等效磁暴对500 k V输电系统电磁暂态的扰动,以路的方式计算磁暴对输电系统电场暂态的影响。计算表明,随着磁暴扰动地磁场的变化,输电线路中的耦合电流呈现单调变化趋势;当地磁变化率为1.6 n T/s时,500 k V单回输电线中最大耦合电流能达到2.4 A以上。另外,磁暴对电网的电磁暂态影响显著;当其在电网中引起的GIC为80 A时,三相分闸过电压增幅10%,潜供电流初始值的中心线偏移最大50 A,应引起足够重视。
[Abstract]:In order to study the influence of geomagnetic storm on the coupling interference of high voltage transmission line and the electromagnetic transient of power system, a coupling model of space time-varying magnetic field and transmission line is established, and the coupling interference relationship between magnetic storm and transmission line is analyzed by field.The electromagnetic transient disturbance of 500kV transmission system is equivalent to the magnetic storm with different sizes of DC power supply, and the influence of magnetic storm on the electric field transient of transmission system is calculated by the way of circuit.The calculation results show that the coupling current in transmission lines shows a monotone variation trend with the geomagnetic field disturbed by the magnetic storm, and the maximum coupling current in 500 kV single circuit transmission lines is over 2.4 A when the local magnetic change rate is 1.6 n T / s.In addition, the magnetic storm has a significant effect on the electromagnetic transient of the power network, and when the GIC caused by the storm is 80A, the increase of the three-phase switching overvoltage is 10, and the maximum shift of the center line of the initial value of the potential supply current is 50A, which should be paid enough attention to.
【作者单位】：重庆大学输配电装备及系统安全与新技术国家重点实验室;国网四川省电力公司电力科学研究院;国网重庆市电力公司南岸供电分公司;
【基金】：国家重点基础研究发展计划(973计划)(2011CB209401) 国家自然科学基金(51477013)~~
【分类号】：TM75

【相似文献】