The medium voltage DC (MVDC) type system can connect multiple terminals to a common MVDC bus, so it is possible several renewable power sources the but circuit breaker needed isolate short accidents that may occur in bus. For this purpose, concept of hybrid takes advantage low conduction loss contact switch and an arcless-breaking semiconductor has been proposed. During break switch, dedicated ...

Using the tail index of returns on US equities as a summary measure of extreme behaviour, we examine changes in the equity markets surrounding the development of program trading for portfolio insurance, the crash of 1987, and the subsequent introduction of circuit breakers and other changes in market architecture. Recentlydeveloped tests for the null of constancy of the tail index, versus the a...

In order to ensure the reliable interruption of high voltage direct current circuit breaker (HVDC CB), breaking test HVDC CB plays an important role in its performance verification. this paper, process is analyzed, and equivalent requirements for are summarized. current, transient (TIV) duration short, which leads insufficient stress. A new synthetic testing CBs proposed, can solve problem TIV ...

Mitigation techniques associating vacuum circuit breakers (VCB) were proven highly effective in reducing switching overvoltages (SOV) wind farms. However, the structure of farms modern-day power systems is not fixed to a certain topology. In this paper, impact changing topology farm upon capability mitigation SOV was investigated which considerd first contribution paper. Four topologies selecte...