Study on shunt active power filter based on cascade multilevel converters

Cascaded Multilevel Inverter Based Active Power Filters: A Survey of Controls

“…The α-β coordinate currents can be calculated as (16) From this equation, we can calculate the orthogonal coordinate's active-power current. The α-axis of the instantaneous active current is written as: (17) Similarly, the β-axis of the instantaneous active current is written as: (18) Let the instantaneous power p(t) in the α-axis and the β-axis is represented as p α and p β respectively. They are given by the definition of real-power as follows.…”

“…A type 2 triangle has its base side atthe top e.g. triangle T 5 , T 10 . The two integers k 1 and k 2 areused to locate the triangle in which the point P lies.…”

A Review of Multilevel Inverter Based Active Power Filter

“…[55] have used carrier Phase shifted PWM in shunt active power filter based on five level cascade converter. In the phase shifted multicarrier modulation all triangular carriers have same frequency and the same peak to peak amplitude but there is a phase shift between any two adjacent carrier waves of magnitude given by…”

Performance investigation of multilevel inverter based active power filter in distorted high voltage supply system

“…Multilevel inverters are effective in high voltage applications as these provide high output voltages with same voltage rating of individual device and maintaining low individual device switching frequency. The use of multilevel inverter also eliminates the need of transformer to feed the power to HV system [2] [3].…”