Review on Partial Discharge and Charge Distribution Characteristics of Oil-paper Insulation in Converter Transformer

被引：0
|
作者：
Li Q. [1 ]
Wang L. [1 ]
Wang P. [1 ]
Li S. [1 ,2 ]
机构：
[1] Shandong Provincial Key Laboratory of UHV Transmission Technology and Equipment, Shandong University, Jinan
[2] State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an
来源：
Gaodianya Jishu/High Voltage Engineering | 2020年 / 46卷 / 08期
基金：
中国国家自然科学基金;
关键词：
Charge distribution; Converter transformer; Oil-paper insulation; Partial discharge; PD mechanism;
D O I：
10.13336/j.1003-6520.hve.20200224006
中图分类号：
学科分类号：
摘要：
Oil-paper insulation, as the main insulation of valve side winding, has long been affected by complex working conditions such as AC/DC composite voltage, harmonics, and polarity inversion. Under the action of electric field, temperature, moisture and other factors, it is easy to generate partial discharge(PD) and space charge/interface charge accumulation, inducing dielectric deterioration or breakdown. We summarized the research status, hotspots and achievements at home and abroad from the PD and charge distribution characteristics of oil-paper insulation. The effects of different voltage types, different aging factors and different insulation positions on PD and charge distribution characteristics are analyzed. Finally, the research trend of PD characteristics and mechanism in the future is prospected, and it is pointed out that PD characteristics under the action of extremely uneven electric field, harmonic and pulse voltage are the key research directions in the future, and the internal relationship between PD characteristics and mechanism should be explored at the same time from the macro and micro perspectives by combining charge distribution experiment/simulation/molecular simulation. The summary of these research results can provide references for on-line monitoring technology based on PD characteristics and improvement of insulation performance of converter transformer. © 2020, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
引用
收藏
页码：2815 / 2829
页数：14
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