| Along with economic development, the energy issue is more and more for concerning, particularly in the world energy increasingly tense situation. Along with economic development, particularly in the world energy increasingly tense situations, more and more energy issues for concern. From china’s electrical equipment and power production situation implementing the transformer economic performance and saving electricity is effective approach to reduce wastage and solve energy crisis for administration of power supply and important power consumer. It may make tremendous economical benefit and social benefit.Power transformer is extensive used electric equipment in the electricity system. It plays a key role in contacting power network, transportation, distribution and use process. At same time the loss energy of power transformer in working accounts for a lion’s share of the loss energy of the network. The loss energy of power transformer expresses itself in form of heat.When the heat is not cooling without delay it can make the temperature of transformer winding going up, cut down the transformer insulation ability, bring about the decrease of the use life of power transformer and lead power transformer faults. Finally it may influence the normal operation of power network. Considering the direct proportion relationship between the transformer winding’ direct resistance and the temperature, when the temperature of transformer winding goes up, the transformer winding’direct resistance increases. It simultaneously causes the increasing of the loss energy of power transformer. Despite that the input of the cooling device can effectively increase cooling and low the temperature of transformer windings the normal work of cooling device needs the energy.The main objective of the paper is to achieve the overall economic power transformer performance in the security conditions with accounting for the normal work of cooling device needing the energy.And, the temperature of transformer windings is not out of control. In this paper, I want to do those works:1. Analyze the change rule between the temperatures, the receptivity and winding DC resistance, deduce the change of the transformer loss in difference temperature and discuss the economic investment of the transformers cooling.2. Incorporating the actual situation of the transformer operation analyze the relationship between the top oil temperature the hottest point of the transformer windings and the average temperature of the transformer windings. 3. On the basis of the temperature control of the transformer and economic cooling strategy design the device to achieve this goal.after putting into operation in Lijia transformer substation zibo Power Company. The results indicate that it realize the purpose of energy conservation and the loss of the transformers.The designed system of the temperature controlling of the transformer in this paper accurately runs and satisfies the intelligent control of the air cooling power transformer. It is significant and practical value to the safety of the transformer. |
