220kV站街变直流融冰装置试验及其应用

Test and application of DC deicing device in 220kV zhanjie substation

直流融冰是解决架空导线覆冰是最直接、最有效、最可靠的融冰方式之一，但由于直流融冰装置只在线路覆冰期间投入运行，大部分时间都处于冷备用状态。为保证直流融冰装置在线路覆冰期间能正常运行，须定期对直流融冰装置进行检查及低压整流试验，通过试验检查晶闸管、二次系统设备的工作状况，使直流融冰装置在覆冰季前进入热备用状态，保证输电线路在冰灾期间的安全稳定运行。

DC - based deicing is the most efficient and reliable way to solve the problem of ice - accumulation of overhead line. As the DC deicing device is always on cold standby state, and come into operation when the overhead line is ice - accumulated, in order to ensuring the DC deicing device working normally during the ice - accumulating and the transmission line working safely and reliably dur- ing the ice disaster, we need to check the deicing device and carry out the low- voltage rectifier test periodically. Through inspecting the thyristor and the secondary system devices condition, the DC deicing device will enter the spinning reserve before the ice - accumulation in order to guaranteeing the safety and stability operation of the transmission line during the ice disaster.