变压器现场绕组低频加热技术及装置研制

Low Frequency Heating Technology and Device Development for Transformer Coil in Short-circuit

防止绝缘受潮是变压器现场处理的关键环节,目前主要采用的热油循环法仍存在效率低、处理时间长等不足,尤其在低温环境下,受设备功率制约,无法达到预期加热目标,影响绝缘处理效果。对低频条件下短路加热技术进行专门研究,利用绕组短路损耗从设备内部加热,提高了加热效率,同时设计研发专门的低频加热装置,可在变电站现场长时间稳定运行。通过实地加热试验验证,证明此装置的有效性。

To avoid the moisture in transformer insulation is the key step in treating the outdoor transformer. Nowadays the method of circular hot-oil is inefficiency. If the air temperature is low, the heating effect can＇t be got. The paper studies the technology of heating the transformer coil in short-circuit. The transformer can be heated by the loss from inner tanker, which can raise heating efficiency. Moreover, a low frequency device for heating is developed which can be used in substation. The experiment proved that the device can raise the heating efficiency.