微地形微气候对导线覆冰有很重大的影响。
Micro - landform and micro - climate could exert great influence on conductor icing.
当系统得到的等值覆冰厚度达到最大17。
冰的电气特性影响输电线路覆冰绝缘子闪络电压。
The flashover voltage of iced insulators of transmission lines is affected by the electrical characteristic of ice.
架空输电线的覆冰灾害是一个国际上普遍关心的问题。
The galloping and ice-shedding of overhead transmission lines is a hard problem, which has been paid great attention to in the world.
线路绝缘子发生覆冰闪络故障，对线路安全运行造成威胁。
The ice flashover accident of transmission line insulator is harmful for transmission line safe operation. The cause of insulator ice flashover is the ice bridge.
输电线路舞动是在覆冰和风激励条件下产生的一种驰振现象。
The transmission line dancing is a kind of galloping phenomenon resulted from ice coating and wind excitation, which has features of large amplitudes and long lasting time.
线路绝缘子发生覆冰闪络故障，对线路安全运行造成了威胁。
The menace of transmission line safe operation is the ice flashover accident of transmission line insulator.
带电覆冰对绝缘子的覆冰状况、覆冰密度和闪络电压均有影响。
For energized icing, icing state, ice density and flashover voltage are affected.
针对驰振发生时的特大厚度覆冰进行覆冰导线模型的风洞测试。
The wind tunnel tests on the aerodynamic characteristics of heavily iced conductors are carried out when severe gallop happens.
由于部分线路跨越覆冰区，因此在绝缘设计上必须予以特殊考虑。
Because partial lines will pass though areas coated with ice, the line insulation design must be considered specially.
结果表明：导线的舞动主要取决于覆冰、风激励、线路结构和参数；
The results show that the formation of conductor galloping mostly depends on icing, wind as well as configuration and parameters of transmission lines. Den.
影响覆冰的自然因素很多，例如地形、风速、电线直径和海拔高度等。
There are many natural factors that affect icing, such as terrain, wind velocity, cable conductor and altitude, etc.
覆冰导线由于风载而造成的舞动，严重地威胁着输电线路的安全运行。
The galloping of iced conductor caused by wind load severely imperils the safe operation of the high voltage transmission line.
在一定程度上，数值结果反映了新月形冰型的覆冰导线模型气动力特性。
To some degree, the numerical result reflects some rules of the static aerodynamic characteristics of iced conductors.
输电线路覆冰可引起导线舞动、杆塔倾斜、倒塌、断线及绝缘子闪络等问题。
Transmission line regelation may cause conductor galloping, pole leaning or collapse, conductor breaking or insulator flashover etc.
6月初，覆冰率(定义为洋面浮冰率15%以上的水域比例)远低于常年水平。
By the beginning of June, the ice cover-as defined by the percentage of ocean covered by at least 15% floating ice-had dropped far below what is usual for the time of year.
通过分析“1·16”事故原因，提出了线路覆冰故障及开关拒动的防范措施。
By analyzing the causation of "1 · 16" failure, brings forward the countermeasures of line covering ice and switch rejecting act.
绝缘子覆冰密度与电场强度、绝缘子材料、结构、形状、覆冰水电导率等有关。
It also shows that the electric strength, the material, type, structure of insulators and the water conductivity may influence the ice density.
得到了不同绞线在典型覆冰类型下的保线电流，与人工气候室的试验结果相吻合。
The anti-icing currents of different steel-cored aluminum stranded wires under typical ice-coating types are obtained and the obtained results coincide with test results in artificial climate chamber.
国内外学者对覆冰绝缘子闪络特性进行了大量研究，但是对闪络机理的研究不多。
Therefore, a systematic study of flashover performance and mechanism of insulators covered-with ice has both a very important academic meaning and an engineering value.
针对我国电力线路严重驰振区的实际情况进行了覆冰导线群的动态气动力特性测试。
The systematic tests have been carried out on the aerodynamic characteristics of galloping of bundled iced electric power transmission lines.
1998年底阳泉地区发生线路绝缘子覆冰闪络故障，对线路安全运行造成了威胁。
The running safety of line was threatened by insulator sleet covering flashover derault of line at the late of 1998.
输电线路是电能传输的重要设备，线路覆冰给电力系统的安全稳定运行造成严重威胁。
Transmission lines are important power transmission equipments, transmission line icing poses a serious threat to the security and stability of power system.
通过导线覆冰试验，研究了输电导线覆冰的过程和规律，探讨了防止导线舞动的新途径。
Based on the tests, this article studied the process and the law of the coagulated ice on power transmission conductors and investigated into the new method of anti galloping.
覆冰绝缘子伞裙间隙未桥接时，冰凌尖端的放电是影响绝缘子闪络电压的主要因素之一。
The discharge at the top of icicle is one of the main factors influencing flashover voltage when the air gap amid the sheds of ice-covered insulators is not bridged.
为减小覆冰对电网正常运行的影响，提出了一种输电线可控线损防覆冰无功优化控制方法。
To reduce the impact of icing on a power grid, a method based on the controllable line losses by reactive power control is presented.
正是由于其特殊的粗糙结构和化学组成，使得该超疏水表面表现出良好的防覆冰和防黏附行为。
Just grounded on the peculiar rough structure and chemical composition, the resulting superhydrophobic aluminum alloy surface possesses excellent anti-icing and anti-adhesion behavior.
输电线路覆冰引起的故障严重地影响了电力系统的安全正常运行，给社会经济带来巨大的损失。
The faults caused by conductor icing seriously influences normal operation of power system and so brings huge losses to social economy.
可供在覆冰区域内的架空线路设计确定覆冰性质、进行频率分析和估算设计覆冰荷载等进行参考。
It can be a certain reference for determining ice sort, frequency analysis and estimating the design ice load on overhead electrical conductors for designing lines in icing areas.
根据对覆冰线路所取得的经验，提出对重冰线路防护对策采取“避、抗、融、改、防”5项措施。
According to the experience of icing on line, the 5 measures "to avoid, fight, melt alter, guard against" were put forward for preventing icing on power transmission line.
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