特高压输电线路绝缘子串较长，电压分布很不均匀。
The insulator strings of UHV AC transmission lines are very long, and the voltage distribution along them is non-uniform.
为保证线路安全运行，研制安装了保护绝缘子串的引弧间隙，并先后在锚塔和高塔上安装了避雷器。
To ensure operation of transmission line safely, the arcing gap of insulator was developed and installed, and arrester was installed one after another on anchor tower and high tower.
线路避雷器仅能保护安装了线路避雷器的杆塔自身的线路绝缘子（串）不发生雷击闪络，无外延的雷击保护范围。
The line arresters can only protect the line insulators on the tower equipped with the line arresters from lightning flash and they have no extended protective range.
输电线路的绝缘配合主要是选择绝缘子型式、绝缘子串的片数和空气间隙。
Selection of insulator type, number of insulator string and air space is the main basis of transmission line insulation coordination.
在2008年初的电网冰灾事故中，导地线金具和绝缘子覆冰掉串是输电线路事故中常见的情况。
In the ice calamity accident of power grid on beginning of 2008, the common condition in the accident of transmission line was the ice loading on earth wire fittings and insulators.
因此，确定绝缘子串电位分布，对检测低、零值绝缘子，确保输电线路的安全、稳定运行具有重要的意义。
Therefore, to determine the potential distribution of insulator string is very important to detect the poor insulator and safety and stable operation of transmission line.
型绝缘子串用于重污秽地区输电线路时，可减小杆塔尺寸，降低工程造价。
The size and construction cost of the tower can be decreased while Y-strings are applied in heavy pollution area.
型绝缘子串用于重污秽地区输电线路时，可减小杆塔尺寸，降低工程造价。
The size and construction cost of the tower can be decreased while Y-strings are applied in heavy pollution area.
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