The Research Of Thermal De-icing Technology On Substation Equipment

In early 2008 our country suffered a large area of ice, most substation had serious icing fault, which caused substation and a large area around power outage. At present, substation de-icing and anti-icing technology isn't mature enough yet. Therefore, In view of the actual situation of the substation equipment and the equipment Icing, research on the safe and effective live de-icing technology in substation is very important on ensuring the safe operation of substation and line and speeding up the pace of rehabilitation and reconstruction of the power system.This paper carried out research work in three areas.Based on collecting the damage circumstance of substation equipment icing and different de-icing technology, this paper has done a comparative analysis of a variety of anti-icing and de-icing technology which may be used in the substation equipment, and determined the substation equipment anti-icing and de-icing technology roadmap, which includes coating anti-icing method, mechanical de-icing method and thermal de-icing method. The thermal de-icing method has a huge application, which includes hot air de-icing method, hot water de-icing and heater de-icing method.Take the case of outdoor post insulator de-icing in the substation, this paper has constructed the engineering calculation model of three thermal de-icing methods. Through the rational engineering approximation to theoretical calculation, this paper has done a preliminary comparative analysis of de-icing effectiveness and economic feasibility of three three thermal de-icing methods.In environmental climate laboratory, this paper has done an experimental study on hot air de-icing method and hot water de-icing method. The experiment designs in accordance with the orthogonal experimental design method. This paper has done an analysis of variance of the experimental results, and studies the effect of de-icing parameters. Moreover, it assesses the possibility of these methods used for the substation anti-icing and de-icing. The experiments and analysis show that the de-icing speed of hot water de-icing is fast, but live hot water de-icing is dangerous and there is little probability of live hot water de-icing. And that the de-icing speed of hot air de-icing is moderate, and the live hot air de-icing is safe which may be used for live de-icing on the substation. Finally, this paper analyzes the safety of live hot air de-icing, and brings forward that it can be used for live de-icing on the substation and live hot air de-icing has very good safety which meet the requirements of the performance indicators for live work.