The traditional synthetic test methods can not verify the breaking performance of UHV circuit-breaker
due to higher power and higher recovery voltage.In this paper
according to three UHV breaking test circuits supplied by STL guide
the waveform of recovery voltage could be simulated by using PSCAD;get the corresponding voltage as boundary conditions to calculate the electric field of UHV circuit-breaker
and analyze the three UHV high-power breaking test circuits.