Improved Breakdown Strength of Polypropylene Film by Polycyclic Compounds Addition for Power Capacitors

In this paper, an improved method for the electric performance of polypropylene (PP) film was proposed to promote the safety and stability of power capacitors. Modified PP films containing three different polycyclic compounds were prepared, which showed good thermal properties and decreased DC conductivity. The DC breakdown strength of the modified PP films under both positive and negative voltage is increased compared with that of the original film. The deep traps introduced by polycyclic compounds and the decreased carrier mobility give an explanation of the decreased DC conductivity. A quantum chemistry calculation was further performed to clarify the mechanism for improving electrical performance, presenting that polycyclic compounds with a high electron affinity and low ionization energy can capture high-energy electrons, protecting the PP molecular chain from attack, and then increase the breakdown strength. It is concluded that the modified PP films by polycyclic compounds have great potential in improving the insulating properties of power capacitors.

[1]  B. Du,et al.  Effects of radical scavenger on space charge accumulation of PP/ULDPE composites for HVDC cable insulation , 2020, IEEE Transactions on Dielectrics and Electrical Insulation.

[2]  Li Peng,et al.  Submodule capacitance requirement reduction with capacitor voltage ripple suppression in MMC , 2020, IET Generation, Transmission & Distribution.

[3]  Boxue Du,et al.  Polycyclic Compounds Affecting Electrical Tree Growth in Polypropylene Under Ambient Temperature , 2020, IEEE Access.

[4]  Feipeng Wang,et al.  Ageing: Causes and Effects on the Reliability of Polypropylene Film Used for HVDC Capacitor , 2020, IEEE Access.

[5]  B. Du,et al.  Mechanism of deep trap sites in epoxy/graphene nanocomposite using quantum chemical calculation , 2019, IEEE Transactions on Dielectrics and Electrical Insulation.

[6]  T. Takada,et al.  Space charge accumulation in double-layer dielectric systems—measurement methods and quantum chemical calculations , 2019, IEEE Electrical Insulation Magazine.

[7]  B. Du,et al.  Effect of graphene nanoplatelets on space charge and breakdown strength of PP/ULDPE blends for HVDC cable insulation , 2018, IEEE Transactions on Dielectrics and Electrical Insulation.

[8]  Joakim P. M. Jämbeck,et al.  Increasing Polypropylene High Temperature Stability by Blending Polypropylene-Bonded Hindered Phenol Antioxidant , 2018 .

[9]  J. Kurimský,et al.  Breakdown voltage of polypropylene film during C and thermal ageing , 2017, 2017 18th International Scientific Conference on Electric Power Engineering (EPE).

[10]  J. Lupin,et al.  Structure effect of thin film polypropylene view by dielectric spectroscopy and X‐ray diffraction: Application to dry type power capacitors , 2015 .

[11]  K. Lahti,et al.  Effects of thermal aging on the characteristic breakdown behavior of Nano-SiO2-BOPP and BOPP films , 2015, 2015 IEEE 11th International Conference on the Properties and Applications of Dielectric Materials (ICPADM).

[12]  Frede Blaabjerg,et al.  Study and Handling Methods of Power IGBT Module Failures in Power Electronic Converter Systems , 2015, IEEE Transactions on Power Electronics.

[13]  Pascal Bevilacqua,et al.  Accelerated Ageing of Metallized Film Capacitors Under High Ripple Currents Combined With a DC Voltage , 2015, IEEE Transactions on Power Electronics.

[14]  Dongmei Wang,et al.  Calculation of Temperature Field in Power Capacitor , 2015, IEEE Transactions on Industrial Electronics.

[15]  Lili Zhang,et al.  High-Temperature Capacitor Polymer Films , 2014, Journal of Electronic Materials.

[16]  Frede Blaabjerg,et al.  Reliability of Capacitors for DC-Link Applications in Power Electronic Converters—An Overview , 2014, IEEE Transactions on Industry Applications.

[17]  T. R. Jow,et al.  High field conduction in biaxially oriented polypropylene at elevated temperature , 2012, IEEE Transactions on Dielectrics and Electrical Insulation.

[18]  Ruijin Liao,et al.  Charge trapping and detrapping in polymeric materials: Trapping parameters , 2011 .

[19]  Dawei Xiang,et al.  An Industry-Based Survey of Reliability in Power Electronic Converters , 2011, IEEE Transactions on Industry Applications.

[20]  Y. Yamano.  Roles of polycyclic compounds in increasing breakdown strength of LDPE film , 2006, IEEE Transactions on Dielectrics and Electrical Insulation.

[21]  C. Reed,et al.  The fundamentals of aging in HV polymer-film capacitors , 1994 .

[22]  K. C. Kao,et al.  New theory of electrical discharge and breakdown in low‐mobility condensed insulators , 1984 .

[23]  M. Perlman,et al.  Drift mobility determinations using surface‐potential decay in insulators , 1976 .