Striking Test to Power Transmission Line and Protection Equipment by Rocket Triggered Lightning

从1985年开始，对输电线路和保护装置进行了雷电触发试验。在冬季或1985年，共进行了15次雷击试验，包括对地线的击打试验。1986年冬季，试验地点转移到海拔约1000米的大石寺山区，12月4日成功进行了世界上第一次冲击500KV输电线路的试验。为进行这项试验，开发了从火箭牵引的钢丝绳底部到输电杆塔臂尖的雷电触发新技术。1987年冬季，该试验继续进行，成功地触发了11次，其中4次是对杆塔放电，1次是对地线放电。一次放电到相导线。成功地实现了接地线误屏蔽击穿相导线和放电电流击穿接地线的重要经验，并成功地进行了两次氧化锌元件的击穿试验。通过地面放电电流和电场的测量，结合手写和照相的放电记录，同时测量了流经杆塔和地线的放电电流以及线路绝缘子两端和杆根与地之间的感应电压。

From 1985 the experiment triggering the lightning discharge to power transmission line and the protection equipments has been carried out. In the winter or 1985, the experiment of lightning to totalling to 15, including the striking test to ground wire, has been performed successfully. In the winter of 1986, the site of experiment was shifted to the Okushishiku mountain at the altitude of about 1000 meters and the experiment striking the power transmission line of 500KV was successfully performed on 4th of December as the first trial in the world. For the experiment new techniques were developed to trigger lightning fromthe bottom of steel wire trailed by rocket to the tip of arm of transmission tower.In the winter of 1987, the experiment was countinued with eleven successful triggerings, which included four discharges to tower, one discharge to ground wire. and one discharge to phass conductor. It was an important experience to realize the striking to phase conductor by a miss-shielding of ground wire together with the damage of the ground wire by discharge current.Two times of striking test to arresxtors were also perfomed auccessfully with the damage of ZnO elements by the discharge current over a loboratory scale. The discharge currents flowing tower and ground wire, and the voltages induced across the line insulators and between tower root and ground, were measured in the same time with the measurements of the discharge current and electric field at ground together with the accorstic and photograghic records of the discharge.