The Study on New Solid-State Breaker and Its Over-voltage Suppression Technique
2013
A design scheme of the intelligent SSB (Solid State
Breaker) based on the IGCT (Integrated Gate Commutated Thyris- tor) is
presented. The topology of switch module and the structure of the SSB are
proposed. Firstly, to the IGCT’s over-voltage sensitivity problem, a new technique
of reducing the over-voltage is introduced, which releases the elect romantics
energy of faulty line by a capacitive current branch to reduce the amplitude of
over-voltage. Secondly, the principle of over-voltage suppression with current
release branch is analyzed, and the overall control scheme of solid- state
breaker is put forward. Finally, the simulation results also demonstrate its
obvious effectiveness in over-voltage suppression after adding a current release
branch into the SSB.
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