CAJ | 학술논문

频域介电谱技术(FDS)是一种基于介电响应原理的绝缘老化状态诊断技术,但是FDS法测量频率范围广,耗时长,变压器油温度在测试过程中受外界温度影响仍处于动态变化中.本研究对自然冷却、风扇冷却、冰水冷却3种方式下绝缘油的频域介电响应进行测试,并与恒温下的测试结果进行对比.结果表明:当频率较高(10~103 Hz)时,由于电场变化周期短,温差变化小,因此3种温度梯度下与恒温下的测量结果相近,而温度变化对FDS测试结果的影响主要体现在低频段(10-3~10 Hz).且温度随时间变化的梯度越大,参数变化越明显.
빈역개전보기술(FDS)시일충기우개전향응원리적절연노화상태진단기술,단시FDS법측량빈솔범위엄,모시장,변압기유온도재측시과정중수외계온도영향잉처우동태변화중.본연구대자연냉각、풍선냉각、빙수냉각3충방식하절연유적빈역개전향응진행측시,병여항온하적측시결과진행대비.결과표명:당빈솔교고(10~103 Hz)시,유우전장변화주기단,온차변화소,인차3충온도제도하여항온하적측량결과상근,이온도변화대FDS측시결과적영향주요체현재저빈단(10-3~10 Hz).차온도수시간변화적제도월대,삼수변화월명현.
The frequency domain spectroscopy (FDS) is an insulation ageing condition diagnosis technolo-gy based on dielectric response for transformer. But the FDS method involves a wide range of frequency and needs a long time, and the temperature is in dynamic change. The frequency domain dielectric responses of insulating oil were tested under natural cooling, fan cooling, and ice water cooling, and the test results were compared with the results under constant temperature. The results show that when the frequency band is high (10~103 Hz), the cycle of electric field is short and the temperature changes little, so the test results are close, and the effects of temperature variation on the FDS results reflect more in the low frequency band (10-3~10 Hz). The larger the temperature gradient variation with time, the more obvious the parameters change.