An optimal strategy with convex-concave constraints for power factor correction and harmonic compensation under different voltages

2016 ◽  
Author(s):  
Hengyi Wang ◽  
Steven Liu
Keyword(s):  
Power Factor ◽  
Optimal Strategy ◽  
Power Factor Correction ◽  
Harmonic Compensation

scholarly journals Grid-Connected Photovoltaic System with Active Power Filtering Functionality

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Joaquín Vaquero ◽  
Nimrod Vázquez ◽  
Ivan Soriano ◽  
Jeziel Vázquez
Keyword(s):  
Power Factor ◽  
Sliding Mode ◽  
Power Factor Correction ◽  
Power Converter ◽  
Active Power ◽  
Photovoltaic System ◽  
Nonlinear Loads ◽  
Harmonic Compensation ◽  
Current Harmonics ◽  
Single Phase Inverter

Solar panels are an attractive and growing source of renewable energy in commercial and residential applications. Its use connected to the grid by means of a power converter results in a grid-connected photovoltaic system. In order to optimize this system, it is interesting to integrate several functionalities into the power converter, such as active power filtering and power factor correction. Nonlinear loads connected to the grid generate current harmonics, which deteriorates the mains power quality. Active power filters can compensate these current harmonics. A photovoltaic system with added harmonic compensation and power factor correction capabilities is proposed in this paper. A sliding mode controller is employed to control the power converter, implemented on the CompactRIO digital platform from National Instruments Corporation, allowing user friendly operation and easy tuning. The power system consists of two stages, a DC/DC boost converter and a single-phase inverter, and it is able to inject active power into the grid while compensating the current harmonics generated by nonlinear loads at the point of common coupling. The operation, design, simulation, and experimental results for the proposed system are discussed.

A Shunt Active Filter Based on Voltage Detection for Harmonic Filtering and Resonance Suppression

2013 ◽  
Vol 457-458 ◽  
pp. 1113-1117
Author(s):  
Ying Yu Liang ◽  
Xing Tao Xu ◽  
Jian Zheng Liu ◽  
Yi Wang ◽  
Qi Xun Yang
Keyword(s):  
Power Factor ◽  
Control Method ◽  
Power Factor Correction ◽  
Control Methods ◽  
Harmonic Compensation ◽  
Shunt Active Filter ◽  
Point Of Common Coupling ◽  
Common Coupling ◽  
The Stability ◽  
Harmonic Filtering

In most occasions shunt APFs and capacitors used for power factor correction exist simultaneously in the distribution network for saving costs. Ideally, APFs are used for harmonics filtering and capacitors are used for power factor correction. However, traditional control methods of APF have potential risk of resonance, affecting the stability and the effect of harmonic compensation, if the detected current contains capacitive current. This paper proposes a new control method based on voltage detection of point of common Coupling(PCC). Theoretical analysis and simulation demonstrate the new control method has functions of resonance suppression and harmonic filtering

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