Enhancement of Power Quality Problem in Grid Using Custom Power Devices

2016 ◽  
pp. 367-375 ◽  
Author(s):  
P. Sivaperumal ◽  
Subhransu Sekhar Dash
Keyword(s):  
Power Quality ◽  
Power Devices ◽  
Quality Problem ◽  
Custom Power

scholarly journals In Phase Compensation of Sag and Swell Voltage by using Dynamic Voltage Restorer

2019 ◽  
pp. 77-83
Author(s):  
Diksha Wasnik ◽  
Radharaman Shaha
Keyword(s):  
Power Quality ◽  
Storage System ◽  
Electrical Equipment ◽  
Control Technique ◽  
Power Devices ◽  
Phase Compensation ◽  
Dynamic Voltage Restorer ◽  
Voltage Restorer ◽  
Dynamic Voltage ◽  
Custom Power

Today most of the industries and customers are using sensitive and sophisticated electrical equipment based on semiconductor devices, these may causes power quality disturbance. The major problems are voltage sag and swell. The sag and swell not only occur by disturbed power quality but also due to high system tapping at point of common coupling. To overcome this problem and to improve power quality the distribution companies uses various custom power devices. Among the various custom power devices Dynamic voltage restorer is used for compensation in this paper, which is most popular and widely used method. Here, In phase compensation technique of DVR is used with battery energy storage system. The voltage at PCC have been observed. The control technique employed here is SRF theory with PI controller. The overall work is carried out in MATLAB Simulink.

scholarly journals Multilevel UPQC Fed Grid Connected Hybrid System for Sag and Swell Mitigation

2019 ◽  
Vol 8 (2S11) ◽  
pp. 2452-2458
Keyword(s):  
Power Quality ◽  
Hybrid System ◽  
Harmonic Distortion ◽  
Multilevel Converter ◽  
Power Electronic Converters ◽  
Power Devices ◽  
Effective Utilization ◽  
Custom Power ◽  
System Power

This paper presents the cascade multilevel UPQC for sag and swell mitigation of a grid connected hybrid system. Power quality is the major problem facing by today’s power system. Due to the use of power electronic converters and devices the harmonics are injected into the grid that may result in grid failure. To mitigate these harmonics custom power devices are used. UPQC is the custom power devise that is used in this paper. The seven level cascade multilevel converter is used for both the series and shunt inverters of UPQC for better harmonic distortion. This system is connected to the PV+WIND hybrid system to provide effective utilization of the resources. The UPQC contains a DC link which controls the Sag and Swell, LG Fault and improves the power quality of the system. This system is simulated in MATLAB/SIMULINK

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