### Literature Review  
Reference [1] pin-points that the source of the harmonics in the power system is owing to the use of non-linear loads that include battery charging system, smart refrigerating and air-conditioning systems, computers, electric furnaces, and fluorescent or LED lighting systems. The current drawn by the non-linear loads or devices is non-linear which leads to poor power quality issues. This non-linear current to be supplied by the input source flows through the entire power system. This may interact with the capacitance and inductance of the system. Therefore, the generated harmonics is one of the major concerns and challenging issues that leads the male functioning of the connected and protection systems, and reliability concerns of devices and components in the power system [2]. They also increase the neutral current in a three-phase power system [3]. They become more serious once they interact with the grid or system's inductance. Therefore, this problem is a major resonance source for poor power quality and instability concerns in the power system. All industrial consumers are forced to improve their produced negative footprint through power compensating topologies. Therefore, the harmonic analysis becomes one of the main concerns for performance evaluation of the power converting systems. The profile of the generated harmonics in the power conversion process is directly linked with the type and switching algorithm of the power processing units. The power quality of the grid or load voltage may be improved through the harmonic elimination techniques. The generated harmonics may be tackled at the unit level or system level [4,5]. Normally, passive [6,7] and active filters [8, 9, 10, 11] are employed to suppress them. The selection of cutoff frequency or bandwidth depends on the frequency of the dominant harmonics. The harmonics elimination through passive filter approaches is normally employed in low power to medium power applications as they are simple and reliable. Here, the basic key is to divert the unwanted components or block them through a high impedance. These techniques may include series, parallel or hybrid filters. In parallel filter techniques, the propagation of generated harmonics is blocked to move towards the source by establishing a low impedance path across the load. In series compensating techniques, harmonics are blocked due to the high impedance of series compensators. The harmonics suppression through traditional DC link capacitors is bulky and unreliable and therefore, this approach is not cost-effective. These issues are tackled in the slim type DC link capacitors as reported in [12]. Here, the magnitude of the harmonics is only evaluated without considering their phase. Their harmonics suppression characteristics at the system level are not improved as they may be achieved with traditional power converting topologies realized with DC or AC filters (choke). The power converting topologies realized with slim type DC link capacitors have improved harmonics suppression capabilities once they are connected in parallel with other power converters. In the AC to DC conversion process, the higher pulse rectifier's topologies may also be employed but their use is restricted to some applications due to their complex circuit arrangement [13, 14, 15, 16]. The mathematical computation of output voltage and input current harmonics of a six-pulse rectifier is reported in [17] but they are not practically validated. The harmonic profile of various outputs of power converting systems is practically evaluated in [1,18]. The variation in the magnitude and phases of harmonics is observed due to the use of a DC-link capacitor or DC and AC chokes [19,20]. It is investigated in [21] that the phase angles of the three-phase and single-phase for the fifth harmonic are equal and opposite at the unit level. But there may be some variation in their phase once the number of power converting systems is connected to the same coupling point.