Five-Level Cascaded H-Bridge MLC-Based Shunt Active Power Filter for Active Harmonics Mitigation in Distributed Network

Abstract

This paper presents an investigation on mitigation of current harmonics, using Cascaded H-bridge Multilevel Converter (CHB-MLC)-based Shunt Active Power Filter (SAPF). Development and analysis of SAPF for harmonic compensation in distribution network for power quality improvement has been discussed. In the proposed work, transformer-less CHB MLC is used which reduces weight and cost of the system. Moreover, a novel controller based on average power method is adopted for generation of compensation active filter current. In order to generate switching signals, multi-carrier Alternate Phase Opposition Disposition (APOD) — Pulse Width Modulation (PWM) schemes are used. The proposed CHB-MLC SAPF reduces the source current THD below 5%. The results are simulated in MATLAB/Simulink and demonstrate the effective mitigation of current harmonics with APOD-PWM schemes. Opal-RT OP4500 real-time digital simulator is used to validate the proposed scheme under different steady state and transient conditions.

Integration of CFA 2 FB control scheme with modified shunt active line conditioner ( MSALC ) connected distribution system for mitigation of harmonics

“…Further, some of the merits are 25 : reduction of harmonics and three-phase neutral return current, improvement of power factor, impact minimization upon the distribution system, voltage regulation and eliminate risk of resonance. [30][31][32][33][34]…”

A novel design of basic module‐based multilevel inverter for symmetrical/asymmetrical sources

“…Multilevel inverter emerges as a key technology in the areas of generation, transmission, distribution, and utilization of electric energy 1 . To effectuate the motivation of modernistic systems, inverters are playing an essential role in several key areas like variable frequency electrical drives, renewable energy integration (solar PV, fuel cells, and wind turbine system), electrical vehicles, and flexible alternating current transmission systems (FACTS) devices 2–5 …”

Photovoltaicmodule integrated modifiedthree‐portinterleaved flyback converterfed six‐levelshunt active power filters

“…The passive filters have some drawbacks such as they are bulky, the exhibition of the channels is influenced by the maturing of the segments, and it gives fixed remunerating attributes toward the pay of current harmonics 6,7 . To overcome the drawback, active filters such as series active power filter, shunt active power filter, static compensator, dynamic voltage restorer, and unified power quality conditioner have been developed for the effective compensation current and voltage disturbances 8‐14 . The series/shunt active power filters, which inject the compensation current to cancel out the load current harmonics, provide the most cost‐effective solution for the current harmonic elimination.…”

“…6,7 To overcome the drawback, active filters such as series active power filter, shunt active power filter, static compensator, dynamic voltage restorer, and unified power quality conditioner have been developed for the effective compensation current and voltage disturbances. [8][9][10][11][12][13][14] The series/shunt active power filters, which inject the compensation current to cancel out the load current harmonics, provide the most cost-effective solution for the current harmonic elimination. However, the series active power filters are unreliable and expensive than the SHAPF topology.…”