Application of PI controller based active filter for harmonic mitigation of grid-connected PV-system

Abstract

The recent trends show the interconnection of PV system with electric grid. With this configuration the issue of harmonics comes into existence. The mounting figure of power-electronic instruments has formed considerable impression on the power-quality of electric supply. Harmonics deformations have conventionally been handled amid the application of passive-LC filters. Active Filter has emerged as a good substitute for passive filters to reduce the harmonics to great extent as it has numerous benefits over the former filters. The active filter’s most vital part is the applied control strategies. Several researches are being under process to advance the functioning of the filter. One of the important control requirements of filter is the regulation of DC link up capacitor voltage. Here the voltage supervision of capacitor is being done using PI controller. The paper show current harmonics compensation of PV grid connected system using PI controller based active filter. Simulation outcomes have been shown which displays the harmonics are within the IEEE boundaries.

Distributed power flow controller based on fuzzy-logic controller for solar-wind energy hybrid system

“…With the aid of third harmonic component, active power switch over occurs between a shunt and a series converter. The DPFC's series converter uses distributed FACTS (D-FACTS) [18]− [22]. Figure 2 represents the internal circuit of DPFC [23].…”

An enhanced control scheme for multifunctional grid connected PV system using fuzzy and predictive direct power control

“…Meanwhile, the main challenge of theses systems is the extraction of the maximum power of the PV system through maximum power point tracking (MPPT)s algorithms, as well as, the power quality injected to the grid, which is in direct relation with power converter and its control strategy [7], [8]. Therefore, the performance of theses systems is highly dependent on the choice of the power converter and the appropriate control technique [9]. The DC link capacitor voltage of the distributed DC-AC inverter should be controlled through a robust con-❒ ISSN: 2302-9285 trollers in order to enhance dynamics, which is prone to rapidly changing of climatic conditions as well as the power load variations.…”