Solid-state circuit breakers (SSCBs) are designed to interrupt fault currents typically several orders faster than its electromechanical counterparts. However, such an ultrafast switching operation would produce a dangerous overvoltage which might cause damages SSCBs and other elements in the system. This paper proposes novel snubber for suppressing overvoltage. It takes advantages of both resi...

The DR-HVDC (Diode rectifier-based HVDC) transmission topology was recently proposed for integration on large offshore wind farms due to its low investment cost and high reliability. To further reduce the investment, a DC collection based series-connected diode rectifiers (DR) is proposed, where no platform needed. However, units of (SCU) show coupling issues, such as overvoltage, energy curtai...

In recent years, several dc fault clearance schemes have emerged, in which the reduced number of fast-acting circuit breakers (DCCBs) and ac (ACCBs) are used to clear faults. offshore grids, such approach entails opening ACCBs that connect wind farms high-voltage (HVDC) stations control voltages frequencies, potentially leading uncontrolled voltage frequency. Existing studies show loss converte...

This paper studies the mechanism and influencing factors of resonance overvoltage EHV transmission lines caused by lightning. By analyzing time domain steady state simplified circuit, physical is revealed. The characteristics transient process waveform are analyzed using electromagnetic simulation. main amplitude also studied. results show that: 1) During uneven open-phase conditions, resonant ...

Medium-voltage direct-current (MVDC) technology exhibits advantages over ac transmission due to its enhanced capacity, controllability, and flexibility. A practical example is the ANGLE-DC project from Scottish Power Energy Networks, which converts existing 33 kV circuits into dc operation improve system capacity in North Wales, U.K. Specially designed cascaded power converters are employed bui...

Increasing arc pressure by tens of times with fine pouring tube, a positive shock wave the entering closed space thin tube (electric recoil wave). The electric is 8 to 23 than that wave. Since has more wave, and their directions are opposite, poring driven away from channel completely emptying large scale truncation formed. Therefore, interrupts lightning current, recombusts form new backwash r...