A new 5L-UHPFC with reduced part count for high speed gen-set applications

New MPC‐5LUC with reduced PSD count for MVHP direct‐drive WECS with PMSG: a cost‐effective solution

“…To take care of this situation, the reference signals are generating after converting signals into a synchronous rotating frame. Equations (7) and (8) are synchronous reference frame emf equations which are derived from (6) as mention below:…”

“…Similarly, the instantaneous input power at the source end of the converter can be calculated after rearranging (6)- (8) into (21)- (28). The matrix form of derived power equations at the source end of topology is expressed in the following equation:…”

“…Therefore, MLCs can reduce the operating switching frequency of ac-dc converter, which can improve the efficacy of the power electronics system. The superior features offered by MLCs leads to a significant penetration in areas like flexible AC transmission system (FACTS), harmonic active power filters, traction drives and hybrid electric vehicles, uninterruptible power supplies, ac motor drive, applications like pumps, fans, compressors and conveyors for industries like mining, marine, oil and gas, metal and so on [1][2][3][4][5][6][7][8][9]. Given their superior features, including sinusoidal input current at unity power factor and high-quality dc output voltage with a filter capacitor of small size, MLCs are receiving much more and wider attention both in terms of topologies and control schemes.…”

Reduced switching state multilevel improved power factor converter for level‐3 electric vehicle applications

“…In addition, charging stations also require most efficient low-cost PECs [2]. This can be met with Multi Level Converters (MLCs) over conventional two-level converter system, because of their superior qualities like [3][4][5][6][7][8][9][10] (i) Increased number of voltage levels can decrease dv/dt stress and harmonics and; therefore, the filter elements size is significantly reduced, which is a great feature in design of on-board electrical chargers. (ii) Voltage rating of power semiconductor devices (PSDs) quite low over two-level topology, which makes MLCs are can be operated on higher ratings which is useful in the fast-charging systems.…”

“…In addition, charging stations also require most efficient low‐cost PECs [2]. This can be met with Multi Level Converters (MLCs) over conventional two‐level converter system, because of their superior qualities like [3–10] (i) Increased number of voltage levels can decrease d v /d t stress and harmonics and; therefore, the filter elements size is significantly reduced, which is a great feature in design of on‐board electrical chargers. (ii) Voltage rating of power semiconductor devices (PSDs) quite low over two‐level topology, which makes MLCs are can be operated on higher ratings which is useful in the fast‐charging systems. (iii) The stress on vehicle bearing is reduced by decreasing common mode voltage. (iv) Nearly sinusoidal currents with minimum Total Harmonic Distortion (THD). (v) The efficiency of the overall converter system is high. (vi) Reduced EMI. In spite of having superior advantageous features, they exhibit significant rise in PSD count, increasing complexity of the hardware and control, which reduces system reliability, requirement of auxiliary circuits: gate driver unit, protection circuit and heat sink etc., causing overall system to be more expensive, bulky. Therefore, the prime concern is to reduce the count of PSDs and gate driver circuits.…”