scholarly journals Recent Trends in Power Quality Improvement: Review of the Unified Power Quality Conditioner

2021 ◽  
Vol 19 (3) ◽  
pp. 268-288
Author(s):  
Swati Gade ◽  
Rahul Agrawal ◽  
Ravindra Munje
Keyword(s):  
Power Quality ◽  
Distribution System ◽  
Electrical Power ◽  
Widespread Application ◽  
Active Power Filters ◽  
Power Filters ◽  
Unified Power Quality Conditioner ◽  
Power Quality Improvement ◽  
Technological Developments ◽  
Power Quality Conditioner

The electrical power sector is currently focusing on power quality (PQ) issues and their mitigation. Industrial automation and the use of power electronic converters for the integration of distributed generation create various PQ problems. This necessitates PQ enhancement, which in turn helps to improve the life span of the equipment as well as the reliability of supply for feeding critical loads within the system. This paper presents a comprehensive review of the Unified Power Quality Conditioner (UPQC) and its widespread application in the distribution system. The UPQC belongs to the family of active power filters. It contributes to the alleviation of voltage and current-related PQ issues along with power factor correction and the integration of renewable energy systems in the distribution network. This paper discusses various topologies, compensation methods, control theories, and the technological developments in recent years. More than 160 research papers have summarized the features of UPQC for further applications. Based on the outcomes of the investigation, the future direction of the UPQC is discussed. This paper is expected to play a major role in guiding research scholars in the application of the UPQC.

Performance Analysis of Unified Power Quality Conditioner for Power Quality Improvement

2014 ◽  
Vol 573 ◽  
pp. 690-695
Author(s):  
Ragavan Saravanan ◽  
P.S. Manoharan
Keyword(s):  
Power Quality ◽  
Control Algorithm ◽  
Electrical Power ◽  
Frame Theory ◽  
Nonlinear Loads ◽  
Unified Power Quality Conditioner ◽  
Synchronous Reference Frame ◽  
Power Quality Improvement ◽  
Linear And Nonlinear ◽  
Power Quality Conditioner

The Unified Power Quality Conditioner plays an important role in the constrained delivery of electrical power from a source to an isolated pool of load or from a source to the grid. This article is presented new control approaches for both series and shunt inverter. The proposed control algorithm for series and shunt converters based on FLC and synchronous reference frame theory respectively. The proposed approach eliminates the total harmonic distortions (THD) efficiently, and mitigates sag and swell present in the linear and nonlinear loads.

scholarly journals Integrated Photovoltaic Inverters Based on Unified Power Quality Conditioner with Voltage Compensation for Submarine Distribution System

Energies ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2927 ◽  
Author(s):  
Desmon Petrus Simatupang ◽  
Jaeho Choi
Keyword(s):  
Quality Improvement ◽  
Power Quality ◽  
Distribution System ◽  
Control Method ◽  
Normal Load ◽  
Quality Level ◽  
Unified Power Quality Conditioner ◽  
Power Quality Improvement ◽  
Power Quality Conditioner ◽  
Submarine Cables

This paper proposes a multi-functional Photovoltaic (PV) inverter based on the Unified Power Quality Conditioner (UPQC) configuration. Power quality improvement is a difficult issue to solve for isolated areas or islands connected to the mainland through long submarine cables. In the proposed system, the line voltage is compensated for by the series inverter while the shunt inverter delivers the PV generating power to the grid. Depending on the technical conditions of power quality and system environment, it has five different operating modes. Especially during poor power quality conditions, the sensitive load is separated from the normal load to provide a different power quality level by using the microgrid conception. In this paper, the control method and the power flow for each mode are described, and the operational performance is verified through a PSiM simulation so that it can be applied to the power quality improvement of weak grid power systems such as in isolated areas or on islands connected to the mainland by long submarine cables.

scholarly journals Review of Power Quality Issues and Mitigation Techniques in Electrical Power Systems

2020 ◽  
Vol 4 (5) ◽  
pp. 116-120
Author(s):  
Abdul Pasha SK ◽  
Prema kumar N
Keyword(s):  
Power Systems ◽  
Power Quality ◽  
Electrical Power ◽  
Electrical Power Systems ◽  
Source Power ◽  
Active Power Filters ◽  
Power Filters ◽  
Voltage Quality ◽  
Power Quality Improvement ◽  
Dynamic Voltage

Power quality complications are treated as interrupted voltage, current or frequency which reflects as malfunction of connected elements at end levels. User system models, smoothen loads of industries and crucial, regular operations of all effected by kinds of outcomes & line distortions, they can impact with economy of the whole system. Here the power quality includes the enhancement of voltage quality, source power factor, control of harmonic distortions, voltage sags and swells. The devices selected for power quality improvement are DSTATCOM, Hybrid active power filters, Dynamic voltage restorers, static var compensators TVSS,CVT etc.

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