Bipolar Charge Transport Model of Insulators for HVDC Applications
Charge transport behavior must be considered in developing HVDC design.
In microscopic level, the space charge and conduction mechanisms are related with energy band‐gap and shallow/deep trap distribution and these come from chemical defects, physical disorder and impurities or by‐products.
Macroscopic model is implemented by COMSOL Multiphyiscs® software.
Electrostatics Electrostatics, Transport Transport of Diluted Diluted Species Species and Heat Transfer Transfer modules modules are used.
Single level deep trap, effective mobility and Schottky injection model are adopted.
Simulated space charge behavior of XLPE specimen are compared with observed one.
The material properties required for macroscopic model of insulator can be obtained by quantum chemical calculation or experimental method.
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