A comparative study of different control algorithm used in unified power quality conditioner for power quality improvement

2021 ◽  
Vol 1 (2) ◽  
pp. 168
Author(s):  
Nikita Gupta ◽  
K. Seethalekshmi
Keyword(s):  
Quality Improvement ◽  
Comparative Study ◽  
Power Quality ◽  
Control Algorithm ◽  
Unified Power Quality Conditioner ◽  
Power Quality Improvement ◽  
Power Quality Conditioner

Photovoltaic tied unified power quality conditioner topology based on a novel notch filter utilized control algorithm for power quality improvement

2018 ◽  
Vol 41 (7) ◽  
pp. 1912-1922 ◽  
Author(s):  
Santanu Kumar Dash ◽  
Pravat Kumar Ray
Keyword(s):  
Quality Improvement ◽  
Power Quality ◽  
Power Distribution ◽  
Control Algorithm ◽  
Notch Filter ◽  
Zero Crossing ◽  
Unified Power Quality Conditioner ◽  
Power Quality Improvement ◽  
Quality Issues ◽  
Power Quality Conditioner

Nonlinear loads and grid side disturbances in the power distribution network cause harmonic rich currents and voltage perturbations such as voltage harmonics, voltage sags and voltage swells. The unified power quality conditioner (UPQC) with shunt inverter and series inverter are usually employed for elimination of current and voltage related power quality issues. However, elimination of voltage and current quality issues in a grid connected Photovoltaic (PV) system is essential. Therefore, PV integrated UPQC topology is proposed in this paper with a novel controller for power quality improvement. The control algorithm based on notch filter Phase Locked Loop (PLL) is utilized for proper phase detection and elimination of voltage and current disturbances. PV tied UPQC controller based on notch filter PLL has the capability to avoid multiple zero crossing during highly distorted grid voltage condition. Conventional control algorithms such as synchronous reference frame theory, unit vector controller based on traditional PLL are also analyzed for the control of PV tied UPQC. The proposed system is developed in Matlab/Simulink and the results obtained are evaluated to measure the performance. A real-time hardware prototype is developed using dSPACE processor. The obtained experimental results validate the efficiency of the proposed controller for PV tied 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.

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