蒋存波,焦 阳,杨家志,王怀红,钟亚洲.脉冲电应力下电气绝缘劣化程度在线检测方法初探[J].电测与仪表,2015,52(17):. JIANG Cunbo,JIAO Yang,YANG Jiazhi,WANG Huaihong,ZHONG Yazhou.Research of online detection method of property degradation of the insulating meterial for pluse electrical[J].Electrical Measurement & Instrumentation,2015,52(17):.
脉冲电应力下电气绝缘劣化程度在线检测方法初探
Research of online detection method of property degradation of the insulating meterial for pluse electrical
In order to meet the needs of online evaluation of the electrical insulating materials’ deterioration degree and remaining life under the pulse electrical stress, such as PWM regulating speed, the leakage current and its change law of the insulating materials under different deterioration degrees are researched. At first, the average life and lowest life of insulating film samples under the condition of corresponding accelerated stresses are determined through the accelerated aging experiments by using the pulse electrical stress accelerated aging experimental device. Then, a batch of preaging samples are created based on the aging model and the deterioration speed of the preaging samples is delayed by decreasing the pulse amplitude and keeping the frequency of accelerated factors invariant. The results of experiment show that the deviation degree between leakage current’s centroid and initial leakage current, the dispersion of leakage current and centroid of observation interval and the slope of leakage current are all related with the deterioration in the observation interval. The insulating deterioration which is defined by these three parameters can well describe the deterioration degree of insulating property.
