scholarly journals Power Quality Improvement in Microgrids using STATCOM under Unbalanced Voltage Conditions

2021 ◽  
Vol 34 (6) ◽  
Keyword(s):  
Quality Improvement ◽  
Power Quality ◽  
Unbalanced Voltage ◽  
Power Quality Improvement

scholarly journals Fuzzy with Hysteresis Controller for Power-Quality Improvement of Grid Interconnected System

2020 ◽  
Vol 9 (3) ◽  
pp. 4059-4062
Keyword(s):  
Quality Improvement ◽  
Power Quality ◽  
Distribution Systems ◽  
Harmonic Distortion ◽  
Voltage Sag ◽  
Interconnected System ◽  
Logic Control ◽  
Unbalanced Voltage ◽  
Hysteresis Controller ◽  
Power Quality Improvement

The grid connected distribution systems are providing the energy to the load from the grid. During the period of energy transmission, the issues are occurred on the power quality in transmission line. In the power system, the power quality issues are occurred due to the following issues as instability of the system, voltage sag, harmonic distortion, over voltage, unbalanced voltage etc. In this paper, the power quality improvement is designed using the inverter which compensates the voltage and current when the fault occurred. This inverter is used to inject the power using a DC source. This improvement of power quality is controlled by the hysteresis controller with fuzzy logic control. The feedback is given to the controller which reduces the error from the system and provides the control variables to the inverter terms of switching gate signals.

scholarly journals Power Quality Improvement of AC Distribution System using 3 Phase PV Integrated UPQC with Advanced Control Strategy

2019 ◽  
Vol 8 (6S3) ◽  
pp. 819-827
Keyword(s):  
Quality Improvement ◽  
Power Quality ◽  
Reactive Power ◽  
Renewable Energy Sources ◽  
Voltage Source ◽  
Dynamical Response ◽  
Pv System ◽  
Proposed Model ◽  
Unbalanced Voltage ◽  
Power Quality Improvement

Renewable energy sources are used to accommodate the ongoing increasing power demand. So, the integration of PV system controlled by the revised p-q concept which is revealed from instantaneous active reactive power concept and a suitable choice to meet the energy demand. Enormous utilization of power electronic converters deviates the quality of power. Series voltage compensation and shunt current compensation is done by the p-q theory. Revised p-q conceptstates the single instantaneous active power and the imaginary powers for active and reactive power compensation. This paper presents the revised p-q concept to generate the reference signals for integrated unified power quality conditioner (PV-UPQC-S). This proposed method enables the process of PV-UPQC-S under unbalanced voltage circumstances at the point of common coupling (PCC). This system incorporates the series voltage source converter (VSC) to control the unbalanced voltage by sharing the part of the reactive power of the load, which in turn reduces the rating of the shunt VSC. The integration of the PV system at the DC bus of UPQC serves the purpose of load sharing as well as power quality improvement to maintain the healthy grid condition. This concept is approved by simulating the proposed model in MATLAB/Simulink. The proposed model comprises of both linear and non-linear loads. The experimental results validates the perfect dynamical response of the given model.

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