Power quality assessment of microgrid using fuzzy controller aided modified SRF based designed SAPF

Abstract

Summary Microgrid (MG), a localized modular power system comprising of distribution generations (DGs) and loads, acts as a single controllable unit in relation to grid. It may either operate in standalone mode or grid connected mode. It offers benefits like efficient and sustainable energy supply, reduced carbon emission, deferring extension of power distribution infrastructures, and so on. However, integration of DGs having different characteristics results in various operational challenges in a MG network. One of which is power quality (PQ) issue. Hence, in this article, impact of PQ issues in an adopted standalone MG system (comprising of solar, wind and fuel cell based DGs) is investigated in the presence of shunt active power filter (SAPF). The realization of SAPF is carried out using conventional synchronous reference frame (SRF) and modified SRF (MSRF) techniques for reference current generation, proportional integral (PI) controller, and fuzzy logic controller (FLC) for DC‐link capacitor voltage regulation and a basic hysteresis band current controller technique for generation of switching pulse for the inverter. The simulation model of conventional SRF/MSRF techniques and the proposed FLC approach based SAPF is developed under MATLAB/SIMULINKR environment both at ideal and nonideal source condition considering inductive and capacitive load. The results obtained using proposed MSRF technique and FLC approach owing to different load scenarios is compared to that of conventional SRF and MSRF technique with PI controller. The comparative results obtained validate the superiority of proposed technique over other related to harmonics elimination and DC‐link capacitor voltage regulation.

A Fuzzy Controller Based SAPF for Power Quality Enhancement of Distribution System Integrated with Wind Energy Source

“…The reference for n th sampling time is taken as a change of error in fuzzification process is determining as follows [18]- [19]…”

“…In [17], the author developed a standalone wind-diesel hybrid system, in which an active shunt filter is introduced to mitigate the harmonics of load current. In [18][19], they are presented the recent work on the grid integration of renewal energy with SAPF for current harmonic elimination. The dc-link voltage control is achieved by either PI or fuzzy logic technique in SRF based SAPF for proposed system.…”

“…The dc-link voltage control is achieved by either PI or fuzzy logic technique in SRF based SAPF for proposed system. In [20], the author discussed the purpose of analysis the harmonic reduction and SAPF control technique using harmonic extractor-based method to renewable energy source integrated with grid. In [21], the author proposed the SRF reference current method based shunt active power filter with PI controller to mitigate the current harmonics from the grid connected wind at PCC simultaneously non-linear load conditions.…”

Robust control for seamless operation of wind‐BES microgrid

“…Apart from the power production, the MG performs several purposes such as reactive power compensation, mitigation of harmonics current, unity power factor (UPF), and providing the uninterrupted supply to the load during mode transition. In IM, the load‐connected VSC (LCVSC) is operated in voltage control mode (VCM) to sustain the voltage and frequency at common coupling point (CCP), and the converter is functioned in current control mode (CCM) for improving the grid power quality (PQ), while operating in GCM 5,6 . However, the transition should be seamless.…”

Performance Improvement of a Distributed Generation System Using Unified Power Quality Conditioner

“…The series inverter acts as a voltage source where as the shunt one is acts as a current source. Simultaneous compensation of voltage and current related PQ distortions using UPQC is achieved by proper controlling of series APF and shunt APF [8]. The shunt APF is employed for providing compensating currents to PCC for generation/ absorption of reactive power and harmonics suppression.…”