Online Degradation of Biaxial-Orientated Polypropylene Film from HVDC Filter Capacitors

被引：38

作者：

Cheng, Lu ^{[1
]}

Liu, Wenfeng ^{[1
]}

Liu, Xiaowei ^{[1
]}

Liu, Chengming ^{[1
]}

Li, Shengtao ^{[1
]}

Xing, Zhaoliang ^{[2
]}

机构：

[1] Xi An Jiao Tong Univ, State Key Lab Elect Insulat & Power Equipment, Xian 710049, Shaanxi, Peoples R China

[2] Global Energy Interconnect Res Inst Co Ltd, State Key Lab Adv Power Transmiss Technol, Beijing 102209, Peoples R China

来源：

IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION | 2019年 / 26卷 / 01期

基金：

中国国家自然科学基金;

关键词：

power capacitors; aging; polypropylene films; HVDC; ELECTRICAL-CONDUCTION; BEHAVIOR; EVALUATE;

D O I：

10.1109/TDEI.2018.007386

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A comparative study of biaxial-orientated polypropylene (BOPP) films extracted from one failed HVDC filter capacitor (serving for 10 years) and one fresh capacitor (spare capacitor from the same batch) is reported in this paper. Experimental results show that the 10-year online operation does not bring about molecular changes; however, molecule reorganization and recrystallization was detected using differential scanning calorimetry and dynamic mechanical analysis tests. Electrical measurements including dielectric spectra, DC conductivity measurement, DC breakdown strength and were also performed. The experimental results show that the aging process causes an increase in dielectric constant, dissipation factor, DC conductivity, and the DC breakdown strength. Thermal stimulated current measurements indicate that traps were introduced by aging and are responsible for such abnormal changes. The nano-cavitivies generated by molecule reorganization could possibly act as charge traps. Therefore, homo-charges can accumulate in the vicinity of the electrodes, leading to the degradation of long-term withstand strength but an enhancement of short-term breakdown strength.

引用

页码：26 / 33

页数：8

共 25 条

[1] Mobility and relaxation of amorphous chains in drawn polypropylene:: 2H-NMR study [J].

Botev, M ;

Neffati, R ;

Rault, J .

POLYMER, 1999, 40 (18) :5227-5232

[2] Influence of isotacticity and its distribution on degradation behavior of polypropylene [J].

Chammingkwan, Patchanee ;

Yamaguchi, Fumitaka ;

Terano, Minoru ;

Taniike, Toshiaki .

POLYMER DEGRADATION AND STABILITY, 2017, 143 :253-258

[3]

Crine Jean-Pierre, 2009, 2009 IEEE Annual Report Conference on Electrical Insulation and Dielectric Phenomena (CEIDP 2009), P47, DOI 10.1109/CEIDP.2009.5377875

[4] Molecular model to evaluate the impact of aging on space charges in polymer dielectrics [J].