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.
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.
参考文献
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%