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An ANN Controlled Three-Phase Auto-Tuned Passive Filter for Harmonic and Reactive Power Compensation
Sindhu M.R,Manjula Nair,T.N.P. Nambiar 전력전자학회 2009 JOURNAL OF POWER ELECTRONICS Vol.9 No.3
Automatically tuned passive filters can improve power quality to a great extent in power systems. A novel three-phase shunt auto-tuned filter is designed to effectively compensate source current harmonics and to provide reactive power required by the non-linear load, which draws a highly reactive, harmonic-rich current from the supply. An artificial neural network (ANN) based controller selects filter component values in accordance with reactive power requirement and harmonic compensation. Traditional passive filters are permanently connected to the system and draw large amounts of source current even under light load conditions. By using auto-tuned filters, the passive filter components can be controlled according to load variations and, hence, draw only required source currents. The selection is done by the ANN with the help of a properly tuned knowledge base to provide instantaneous compensation using a digital controller.
Design and Implementation of Instantaneous Power Estimation Algorithm for Unified Power Conditioner
Sindhu S.,Sindhu M. R.,T. N. P. Nambiar 전력전자학회 2019 JOURNAL OF POWER ELECTRONICS Vol.19 No.3
This paper discusses a simple control approach for a Unified Power Conditioner (UPC) system to achieve power quality compensation at the point of common coupling in distribution systems. The proposed Instantaneous Power Estimation Algorithm (IPEA) for shunt and series active power filters uses a simple mathematical concept that reduces the complexity in the design of the controller. The performance of a UPC is verified with a system subjected to voltage distortions, sags/swells and unbalanced loads using MATLAB/SIMULINK. The simulation study shows that a UPC with the proposed control algorithm can effectively compensate for voltage and current harmonics, unbalance and reactive power. The control algorithm is experimentally implemented using dSPACE DS1104 and its effectiveness has been verified.
Higher Order Spectra based Features for Infant Cry Signal Classification
( M. Hariharan ),( Yogesh C. K. R. Sindhu ),( Vikneswaran Vijean ),( Haniza Yazid ),( Thiyagar Nadarajaw ),( Kemal Polat ),( Sazali Yaacob ) 한국감성과학회 2017 한국감성과학회 국제학술대회(ICES) Vol.2017 No.-
Crying is an early communication medium for infants. The cry analysis provides an opportunity to assess the physical and pathological status of infants. Several short-term cepstral/spectral features were extracted from the recorded cry signals to detect the reason for crying (hunger, pain, sick condition etc). In this work, Higher order spectra (HOS) based features were proposed to study its efficacy in better representation of cry signals. Statistical features from Bi-spectral plots were derived. Two well-known short-term feature sets known as Mel-frequency cepstral coefficients (MFCCs) and Linear predictive coding based cepstral coefficients (LPCs, Linear predictive cepstral coefficients- LPCCs and weighted LPCCs) were also used. Cry signals from 2 different databases were utilized. Several experiments of twoclass and multi-class classification of cry signals were conducted and the results were reported to demonstrate the effectiveness of the proposed method. The experimental results indicate proposed combination of HOS based features with standard short-term cepstral features help to achieve promosing infant cry classification accuracy.
Design and Implementation of Instantaneous Power Estimation Algorithm for Unified Power Conditioner
S., Sindhu,M.R., Sindhu,Nambiar, T.N.P. The Korean Institute of Power Electronics 2019 JOURNAL OF POWER ELECTRONICS Vol.19 No.3
This paper discusses a simple control approach for a Unified Power Conditioner (UPC) system to achieve power quality compensation at the point of common coupling in distribution systems. The proposed Instantaneous Power Estimation Algorithm (IPEA) for shunt and series active power filters uses a simple mathematical concept that reduces the complexity in the design of the controller. The performance of a UPC is verified with a system subjected to voltage distortions, sags/swells and unbalanced loads using MATLAB/SIMULINK. The simulation study shows that a UPC with the proposed control algorithm can effectively compensate for voltage and current harmonics, unbalance and reactive power. The control algorithm is experimentally implemented using dSPACE DS1104 and its effectiveness has been verified.