Application of Space Charge Detection Technology in Dielectrics under Periodic Stress

作者：Wu, Jiandong; Yin, Yi

来源：Proceedings of the CSEE, 2018, 38(5): 1572-1581.

DOI：10.13334/j.0258-8013.pcsee.162342

• Automatic equal phase shift principle (AEPS)
• Detection methods
• Detection technology
• Electrical devices
• Frequency limitation
• Parameters optimization
• Periodic stress
• Phase-shift method

The detection technologies associated with space charge inside dielectric are introduced in order to promote the space charge investigation under periodic stress. For space charge detection under periodic stress, the detecting phase of excitation pulse always shift under period stress. It means that all the methods used for space charge detection under periodic stress are associated with phase shift method. For traditional detection method completing within one period and phase-shift circuit method completing within several periods, the phase resolution is hard to enhance due to the frequency limitation of detecting pulse source. According to the automatic equal phase shift principle (AEPS), the phase shift and equal detection can be easily realized only by the frequencies setting for periodic stress and detecting excitation pulse. Thus AEPS principle simplifies the space charge detection under arbitrary periodic stress and can promote the space charge research under practical stress existing in electrical devices. This principle is based on the detection phase overlap under periodic stress and overcomes the frequency limitation of detecting pulse source. The high phase resolution can be easily realized by detecting excitation pulse with low frequency. The phase resolution is determined by the amount of detecting pulse to realized one detection phase overlap for the periodic stress and the detecting excitation pulse. In practice, several conditions must be considered in order to optimize the parameters used for AEPS principle, such as the factors associated with detection time, data size of signal, and frequency errors for the periodic stress and the detecting excitation pulse.

• 出版日期2018
• 单位上海交通大学