基于高频高压激励法的输电线路融冰方法研究

针对现有输电线路融冰技术的缺陷,提出了一种基于线路集肤效应和电介质损耗理论的18kV、40 kHz高频高压激励融冰方法.该方法通过提高线路融冰电流的频率来加深线路的集肤效应,使线路单位长度的电阻显著提高,即在相同的发热功率要求下可减少线路的传输电流.简要论述了除冰装置的具体构成及其线路连接运行图.根据1000 kV特高...

Research on Transmission Line De-icing Method Based on High-frequency and High-voltage Excitation

Transmission line de-icing method of 18 kV,40 kHz high frequency and high voltage excitation based on skin effect of conductor and dielectric loss is presented to overcome the existing technical defect.It increase the frequency of de-icing current to strength the skin effect of transmission lines,thus the line unit resistance is observably increased,that is the melting current can be decreased with same heating power requirement.The structure of de-icing device and its Wiring diagram are analyzed briefly.A de-icing simulation calculation model is established according to 1 000 kV ac EHV transmission lines,and a series of parameters about excitation source and environment variable are joined in,and simulation is carried out by using ANSYS finite element analysis software.The simulation results show that the method,transmission line de-icing method of 18 kV,40 kHz high frequency and high voltage excitation,has advantages of good feasibility,high efficiency and energy saving.