Grid voltage detection method based on a novel adaptive notch filter for control of transformerless dynamic voltage restorer

2020 ◽  
Author(s):  
Kodari Rajkumar ◽  
P. Parthiban
Keyword(s):  
Detection Method ◽  
Notch Filter ◽  
Dynamic Voltage Restorer ◽  
Grid Voltage ◽  
Adaptive Notch Filter ◽  
Voltage Restorer ◽  
Dynamic Voltage

scholarly journals An improved ip-iq harmonic detection method

2021 ◽  
Vol 248 ◽  
pp. 02045
Author(s):  
Yang Guoqing ◽  
Yan Kai ◽  
Wang Deyi ◽  
Chai Yuan ◽  
He Xu
Keyword(s):  
Reactive Power ◽  
Detection Method ◽  
Moving Average ◽  
Notch Filter ◽  
Positive Sequence ◽  
Harmonic Detection ◽  
Grid Voltage ◽  
Adaptive Notch Filter ◽  
Voltage Signal ◽  
Low Pass

The ip-iq harmonic detection method based on instantaneous reactive power has been widely used in active power filter (APF). However, the traditional ip-iq detection method has errors when the grid voltage is unbalanced and distorted. This paper proposes an improved ip-iq harmonic detection method, which uses adaptive notch filter (ANF) to extract the fundamental positive-sequence voltage signal, so that the phase locked loop (PLL) can still accurately obtain the phase information under bad grid conditions. At the same time, moving average filter (MAF) is used to replace low-pass filtering to reduce the detection delay. The simulation results show that the improved ip-iq detection method can accurately detect harmonic current under non-ideal grid voltage conditions, and has good dynamic characteristics.

scholarly journals Power Quality Improvement Using Three-Phase Solar PV Integrated UPQC

2020 ◽  
Vol 6 (7) ◽  
pp. 153-158
Author(s):  
V Nanthagopal , Dr. S Chitra
Keyword(s):  
Power Quality ◽  
Dual Function ◽  
Solar Pv ◽  
Nonlinear Load ◽  
Dynamic Voltage Restorer ◽  
Current Harmonics ◽  
Grid Voltage ◽  
Voltage Restorer ◽  
Dynamic Voltage ◽  
Grid Side

This paper proposes the application of a Dynamic Voltage Restorer (DVR) to enhance the power quality and analyzed the solar PV integrated unified power quality conditioner (PV-UPQC).The PV-UPQC is employed to maintain power quality under various current and voltage distortion. The PV-UPQC consists of a shunt and series compensators connected back to back with common DC-link. The shunt compensator performs the dual function of extracting power from PV array apart from compensating for load current harmonics. The series compensator compensates for the grid side power quality problems such as grid voltage sag and swell. In proposed system Dynamic Voltage Restorer (DVR) is used as a series compensator and also it enhance the power quality. The UPQC is eliminate power quality issues like unbalanced grid voltage with harmonics and load harmonics. The performance of the system are evaluated by simulating in MATLAB/Simulink environment under a nonlinear load.

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