نتایج جستجو برای: low voltage ride through
تعداد نتایج: 2486257 فیلتر نتایج به سال:
in this thesis,spin dependend transport and electron transport through of ng/sg(graphene/ superconductor graphen) are studied in the junction of ng/fgt/sg. due to andreev reflection conductance increases in the presence of superconductor graphene.also, by applying a voltage gate on a superconductor, fermi level shifts and the conductance is independent of ferromagnatic substrate. also, the cond...
This paper proposes the use of bridge type fault current limiters (BFCLs) as a potential solution to reduce the impact of fault disturbance on voltage source converter-based high voltage DC (VSC-HVDC) systems. Since VSC-HVDC systems are vulnerable to faults, it is essential to enhance the fault ride-through (FRT) capability with auxiliary control devices like BFCLs. BFCL controllers have been d...
DFIG based wind turbines (WTs) are very sensitive to grid voltage dips. This is because the grid voltage dips imposed at the connection point of the DFIG to the grid induce large voltages in the rotor windings, resulting in high rotor current. According to high penetration of DFIG based WTs, it is important that the WTs remain connected to the grid during the voltage dips and improve the grid s...
Wind Energy Conversion System (WECS) based on Doubly Fed Induction Generator (DFIG) connected to the grid is subjected to high transient currents at rotor side and rise in DC-link voltage during voltage sag at stator/grid side. To secure power system operation wind turbines have to meet grid requirements through the Low voltage ride through (LVRT) capability and contribute to grid voltage contr...
To deal with the DC-link overvoltage during high-voltage ride-through (HVRT) of wind turbine, a coordinated voltage control (CDVC) scheme is proposed for enhancing HVRT performance offshore doubly-fed induction generator (DFIG) turbines equipped supercapacitor energy storage system (SESS). This formulated as two-stage problem depending on depth grid swell, which can prevent damaging converter r...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید