Dr K Narasimhaiah Achari - Academia.edu (original) (raw)
Uploads
Papers by Dr K Narasimhaiah Achari
This paper proposes a new move toward to assess the performance of sensorless control of interior... more This paper proposes a new move toward to assess the performance of sensorless control of interior permanent magnet synchronous motor (IPMSM) drive along with electromagnetic noise effect by using EKF. Normally in rotary condition, rotor position and speed estimation of IPMSM drive are drawn through an Extended Kalman Filter (EKF) algorithm by measuring its voltages and currents of the stator. The main drawback in developing EKF is it may not proficient to consider the effect of electromagnetic noise which is mainly produced during the time of different speed ranges. Owing to this reason this may cause to vary the motor flux linkages which are significant to find the rotor position and speed by EKF method will give approximate results. To carry on this process, we present the simulation results for sensorless speed control of IPMSM drive by using EKF algorithm with the incorporation of a noise signal which is corresponding to the frequency of electromagnetic noise signal using MATLA...
This essay describes a manner to invent robust law misgiving dispirit leader of an electricity ca... more This essay describes a manner to invent robust law misgiving dispirit leader of an electricity cache type a fixed coexistent compensator is state-of-the-art FACT method, whatever manages both operating and reoperation strength at PCC in the management technique. To advocate sovereignty organization balance, dampen of low repetition management misgivings are elemental, and that is measured by adopting a warn reckoning skill positioned on modified recurrent first plaza finding. During the disturbances, the planned purpose vigorous by increasing the dampening of the technique at the extraordinary frequencies, technique framework uncertainties and different tie limits of the passive contemporary compensator. i.e., STATCOM. Paper examines the figure of an impress of alive and keen management inoculation of prestige arrangement, whatever will bear out applying two machinery design and dampen organizer form. This predominant scheme optimizes the appearance of dynamic and reoperating sovere...
Agricultural sector is backbone of Indian economy. As population growth results in an increasing ... more Agricultural sector is backbone of Indian economy. As population growth results in an increasing demand on water supply. Usually, growers determine how much water is needed to irrigate their field based on the amount of time elapsed since last irrigation cycle. An automated irrigation system enables the users to constantly monitor the relative soil moisture at many different locations throughout the field to more precisely schedule irrigation cycles. The sensing system is based on a feedback control mechanism with a centralized control unit which regulates the flow of water on to the field in the real time based on the instantaneous temperature and moisture values. Depending on the varied requirement of different crops, a lookup table has been prepared and referred to for ascertaining the amount of water needed by that crop.
2021 2nd Global Conference for Advancement in Technology (GCAT), 2021
Today, Smart Grid (SG) is an intelligent and effective way of having endless growth and developme... more Today, Smart Grid (SG) is an intelligent and effective way of having endless growth and development possibilities. On the other side, Vehicle-to-Grid (V2G) is also gaining importance due to its attractive features like transferring bi-directional power using the power electronic converters between Electric Vehicles (EVs) and grid, regulating grid voltage/frequency etc. This V2G concept offers benefits to users, utilities, economics and also the environment but in spite of all this, it also needs further insight related to the Electromagnetic Interference (EMI) issues, due to the presence of bi-directional power flow converters, which are left unattended. In order to be competitive in present times the EMI noise signal, which is presented in the actual signal and energy efficiency characteristics should be focused smartly. The present electrical technology is dominated by the converters, which are based on power electronics, so this paper proposes a Wavelet Transform (WT) based time frequency localized approach for EMI noise mitigation in V2G systems. The effectiveness of the proposed method is evaluated in terms of Signal-to-Noise Ratio (SNR) and the investigation is mainly focused on harmonics and the conducted EMI suppression.
International Journal of Electronics and Electical Engineering, 2014
A photovoltaic array (PVA) simulation model to be used in Matlab-Simelectronic GUI environment wi... more A photovoltaic array (PVA) simulation model to be used in Matlab-Simelectronic GUI environment will be developed and analyzed in this paper. In Simelectronic environment the simulink signal is converted to physical signal and again physical signal is converted to simulink signal. The model is developed using basic circuit equations of the photovoltaic (PV) solar cells including the effects of solar irradiation and temperature changes. The new model developed will be tested using a directly coupled dc load. A new implemented Photovoltaic Array Simulation model is to be developed by using Matlab/ Simelectronic Simulation Software. Test and validation studies with proper load matching circuits are simulated and results are presented here.
International Journal of Electronics and Electical Engineering, 2014
This paper presents a modified C-dump converter for permanent magnetic synchronous (PMSM) machine... more This paper presents a modified C-dump converter for permanent magnetic synchronous (PMSM) machine used in the flywheel energy storage system. The converter can realize the energy bidirectional flowing and has the capability to recover the energy extracted from the turnoff phase of the PMSM machine. The principle of operation, modeling, and control strategy of the system has been investigated in the paper. Simulation and experimental results of the proposed system are also presented and discussed.
A modified Direct Torque Control (DTC) by using Space Vector Modulation (DTC-SVM) for
International Journal of Power Electronics and Drive Systems (IJPEDS), 2018
This paper proposes a new move toward to assess the performance of sensorless control of interior... more This paper proposes a new move toward to assess the performance of sensorless control of interior permanent magnet synchronous motor (IPMSM) drive along with electromagnetic noise effect by using EKF. Normally in rotary condition, rotor position and speed estimation of IPMSM drive are drawn through an Extended Kalman Filter (EKF) algorithm by measuring its voltages and currents of the stator. The main drawback in developing EKF is it may not proficient to consider the effect of electromagnetic noise which is mainly produced during the time of different speed ranges. Owing to this reason this may cause to vary the motor flux linkages which are significant to find the rotor position and speed by EKF method will give approximate results. To carry on this process, we present the simulation results for sensorless speed control of IPMSM drive by using EKF algorithm with the incorporation of a noise signal which is corresponding to the frequency of electromagnetic noise signal using MATLA...
This paper proposes a new move toward to assess the performance of sensorless control of interior... more This paper proposes a new move toward to assess the performance of sensorless control of interior permanent magnet synchronous motor (IPMSM) drive along with electromagnetic noise effect by using EKF. Normally in rotary condition, rotor position and speed estimation of IPMSM drive are drawn through an Extended Kalman Filter (EKF) algorithm by measuring its voltages and currents of the stator. The main drawback in developing EKF is it may not proficient to consider the effect of electromagnetic noise which is mainly produced during the time of different speed ranges. Owing to this reason this may cause to vary the motor flux linkages which are significant to find the rotor position and speed by EKF method will give approximate results. To carry on this process, we present the simulation results for sensorless speed control of IPMSM drive by using EKF algorithm with the incorporation of a noise signal which is corresponding to the frequency of electromagnetic noise signal using MATLA...
This essay describes a manner to invent robust law misgiving dispirit leader of an electricity ca... more This essay describes a manner to invent robust law misgiving dispirit leader of an electricity cache type a fixed coexistent compensator is state-of-the-art FACT method, whatever manages both operating and reoperation strength at PCC in the management technique. To advocate sovereignty organization balance, dampen of low repetition management misgivings are elemental, and that is measured by adopting a warn reckoning skill positioned on modified recurrent first plaza finding. During the disturbances, the planned purpose vigorous by increasing the dampening of the technique at the extraordinary frequencies, technique framework uncertainties and different tie limits of the passive contemporary compensator. i.e., STATCOM. Paper examines the figure of an impress of alive and keen management inoculation of prestige arrangement, whatever will bear out applying two machinery design and dampen organizer form. This predominant scheme optimizes the appearance of dynamic and reoperating sovere...
Agricultural sector is backbone of Indian economy. As population growth results in an increasing ... more Agricultural sector is backbone of Indian economy. As population growth results in an increasing demand on water supply. Usually, growers determine how much water is needed to irrigate their field based on the amount of time elapsed since last irrigation cycle. An automated irrigation system enables the users to constantly monitor the relative soil moisture at many different locations throughout the field to more precisely schedule irrigation cycles. The sensing system is based on a feedback control mechanism with a centralized control unit which regulates the flow of water on to the field in the real time based on the instantaneous temperature and moisture values. Depending on the varied requirement of different crops, a lookup table has been prepared and referred to for ascertaining the amount of water needed by that crop.
2021 2nd Global Conference for Advancement in Technology (GCAT), 2021
Today, Smart Grid (SG) is an intelligent and effective way of having endless growth and developme... more Today, Smart Grid (SG) is an intelligent and effective way of having endless growth and development possibilities. On the other side, Vehicle-to-Grid (V2G) is also gaining importance due to its attractive features like transferring bi-directional power using the power electronic converters between Electric Vehicles (EVs) and grid, regulating grid voltage/frequency etc. This V2G concept offers benefits to users, utilities, economics and also the environment but in spite of all this, it also needs further insight related to the Electromagnetic Interference (EMI) issues, due to the presence of bi-directional power flow converters, which are left unattended. In order to be competitive in present times the EMI noise signal, which is presented in the actual signal and energy efficiency characteristics should be focused smartly. The present electrical technology is dominated by the converters, which are based on power electronics, so this paper proposes a Wavelet Transform (WT) based time frequency localized approach for EMI noise mitigation in V2G systems. The effectiveness of the proposed method is evaluated in terms of Signal-to-Noise Ratio (SNR) and the investigation is mainly focused on harmonics and the conducted EMI suppression.
International Journal of Electronics and Electical Engineering, 2014
A photovoltaic array (PVA) simulation model to be used in Matlab-Simelectronic GUI environment wi... more A photovoltaic array (PVA) simulation model to be used in Matlab-Simelectronic GUI environment will be developed and analyzed in this paper. In Simelectronic environment the simulink signal is converted to physical signal and again physical signal is converted to simulink signal. The model is developed using basic circuit equations of the photovoltaic (PV) solar cells including the effects of solar irradiation and temperature changes. The new model developed will be tested using a directly coupled dc load. A new implemented Photovoltaic Array Simulation model is to be developed by using Matlab/ Simelectronic Simulation Software. Test and validation studies with proper load matching circuits are simulated and results are presented here.
International Journal of Electronics and Electical Engineering, 2014
This paper presents a modified C-dump converter for permanent magnetic synchronous (PMSM) machine... more This paper presents a modified C-dump converter for permanent magnetic synchronous (PMSM) machine used in the flywheel energy storage system. The converter can realize the energy bidirectional flowing and has the capability to recover the energy extracted from the turnoff phase of the PMSM machine. The principle of operation, modeling, and control strategy of the system has been investigated in the paper. Simulation and experimental results of the proposed system are also presented and discussed.
A modified Direct Torque Control (DTC) by using Space Vector Modulation (DTC-SVM) for
International Journal of Power Electronics and Drive Systems (IJPEDS), 2018
This paper proposes a new move toward to assess the performance of sensorless control of interior... more This paper proposes a new move toward to assess the performance of sensorless control of interior permanent magnet synchronous motor (IPMSM) drive along with electromagnetic noise effect by using EKF. Normally in rotary condition, rotor position and speed estimation of IPMSM drive are drawn through an Extended Kalman Filter (EKF) algorithm by measuring its voltages and currents of the stator. The main drawback in developing EKF is it may not proficient to consider the effect of electromagnetic noise which is mainly produced during the time of different speed ranges. Owing to this reason this may cause to vary the motor flux linkages which are significant to find the rotor position and speed by EKF method will give approximate results. To carry on this process, we present the simulation results for sensorless speed control of IPMSM drive by using EKF algorithm with the incorporation of a noise signal which is corresponding to the frequency of electromagnetic noise signal using MATLA...