This indicates that partial
discharge cases caused by different insulation defects possess
different discharge mechanisms, resulting in distinction among
electromagnetic waves excited by them. It can be inferred that
the application of distinction among UHF PD signals can
differentiate different types of insulation defects, thus
providing theoretical basis for recognition of discharge source
pattern based on UHF PD time domain signals. XFDTD is
high-frequency electromagnetic simulation software developed
by Remcom company in America, and it adopts FDTD
algorithm to solve Maxwell’s Equations, with its application of
frequency scope of 100kHz~3000GHz. With user-defined
interface at excitation source, signal data can be manufactured
into .src source file according to the required format, thus the