This paper presents a comprehensive review on the unified power quality conditioner (UPQC) to enhance the electric power quality at distribution levels. This is intended to present a broad overview on the different possible UPQC system configurations for single-phase (two-wire) and three-phase (three-wire and four-wire) networks, different compensation approaches, and recent developments in the field. It is noticed that several researchers have used different names for the UPQC based on the unique function, task, application, or topology under consideration. Therefore, an acronymic list is developed and presented to highlight the distinguishing feature offered by a particular UPQC. In all 12 acronyms are listed, namely, UPQC-D, UPQC-DG, UPQC-I, UPQC-L, UPQC-MC, UPQC-MD, UPQC-ML, UPQC-P, UPQC-Q, UPQC-R, UPQC-S, and UPQC-VA. More than 150 papers on the topic are rigorously studied and meticulously classified to form these acronyms and are discussed in the paper.

Enhancing Electric Power Quality Using UPQC: A Comprehensive Overview

An Effective Solar Photovoltaic Module Parameter Estimation Technique for Single-Diode Model

The paper proposes the application of constant frequency unified power quality conditioner to overcome the power quality issues in fixed speed wind mill connected with the micro grid The power circuit of a constant frequency unified power quality conditioner (CF-UPQC) is based on a combination of UPQC, and frequency regulator (matrix converter) This equipment incorporates compensation functions like voltage sag, voltage swell, reactive power compensation, current harmonic rejection, and also provides frequency regulation Integrated series and parallel active filter (UPQC) is a universal solution for the most power quality problems The main drawback is that it cannot regulate the supply frequency variation Here CF_UPQC the matrix converter is used for frequency regulation This integration, the compensator compensates all the power quality issue for fixed speed induction wind generator Simulation results are presented to confirm that this approach has better performance over the existing power quality conditioners for FSIWG connected with micro grid

Constant frequency-unified power quality conditioner for wind turbine generator connected with micro grid

https://google.iopscience.iop.org/article/10.1088/1757-899X/937/1/012029/pdf

A review on issues, challenges and various optimization techniques in microgrid

At present the multi-feeder power distribution system is deteriorated with continuity of supply and poor power quality standards. In this multi-feeder distribution system, it is a regular consumer related issue which is acquired due to misfunctioning of massive non-linear load devices. These loads create the voltage/current imperfections on distribution networks which disrupts the power quality of distribution system. An efficient and reliable active compensation scheme is used for attaining enhanced power quality features at PCC of multi-feeder distribution system with effective control functions. The Multi-Feeder Unified Power Quality Compensator (MF-UPQC) is optimal choice for attaining enhanced power quality features and it is a combined operation of both shunt/series compensator driven by common DC-link. In this paper, a newly proposed MFUPQC is used to compensate all voltage-current PQ imperfections by using advanced intelligent control schemes. The performance evaluation of proposed MF-UPQC is verified by classical PI and proposed intelligent based Fuzzy and hybrid-Fuzzy control functions by using MATLAB/Simulink tool and results are conferred with comparisons.

Realization of Novel Multi-Feeder UPQC for Power Quality Enhancement Using Proposed Hybrid Fuzzy+PI Controller

This paper presents a novel control strategy for the case of 3-phase 3-wire Unified Power-Quality Conditioner (UPQC) based on the concepts of instantaneous active and reactive Power theory. The UPQCs is one of the major custom power solutions capable of mitigating the effect of supply voltage sags / swells, distortion, unbalance voltage at the point of common coupling (PCC) as well as load harmonics, unbalance load and reactive power requirement of load. Using this control strategy harmonic detection, reactive power compensation, voltage sag and swell have been simulated and the results are analyzed. The operation and capability of the proposed system was analyzed through simulations with MATLAB / SIMULINK

J Sukumar Mishra

Papers

Instantaneous power theory based Unified Power Quality Conditioner (UPQC)