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  

Interference Law of Magnetic Storm in High Voltage Transmission Line and Its Effect on Electromagnetic Transient of Power System

作　　者：杨帆[1] 樊灵强 甘德刚[2] 段盼[3] 

机构地区：[1]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,重庆400030 [2]国网四川省电力公司电力科学研究院,成都610072 [3]国网重庆市电力公司南岸供电分公司,重庆401336

出　　处：《高电压技术》2016年第6期1981-1989,共9页High Voltage Engineering

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)~~

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。In order to study the coupling interference of magnetic storms on high voltage transmission line and its effect on electromagnetic transient of power system, we established a coupling model of space time-varying magnetic field and transmission line, and analyzed the coupling interference relationship between magnetic storms and power lines in the form of field. In addition, we used different DC power supplies to simulate the electromagnetic transient disturbance from magnetic storm for the 500 k V power transmission system, and calculated its effect on power system in the form of circuit. The results indicate that the coupling current in transmission line is varied uniformly with the magnetic storm changing. When the change rate of magnetic field is 1.6 n T/s, the maximum coupling current of 500 k V single transmission line can be more than 2.4 A. Moreover, the magnetic storm has significant effects on the electromagnetic transient, when the magnetically induced current in the power grid caused by magnetic storm reaches 80 A, the growth of three-phase braking overvoltage is beyond 10%, and the offset of the initial secondary arc current is more than 50 A, which should be paid attention to.

关 键 词：磁暴 耦合干扰 地磁感应电流 电磁暂态 过电压 潜供电流 

分 类 号：TM75[电气工程—电力系统及自动化]