2016 National Power Systems Conference (NPSC), 2016
Review of theory, application, modelling, and limitations of an electric spring (ES), a custom po... more Review of theory, application, modelling, and limitations of an electric spring (ES), a custom power device, is provided after going through published literature in this field. An ES controls active as well as reactive power and hence can regulate voltage along with power quality enhancement, in the presence of intermittent and unpredictable renewable energy sources. ES is connected in series with part of the total load and can damp out the oscillations of the grid by providing voltage regulation to the load and acts as a smart load. Presence of numerous ES can be visualized in a distribution feeder, acting simultaneously in unison without having any communication within.
India International Conference on Power Electronics 2010 (IICPE2010), 2011
... Wiley IEEE press. [4] Amit Jain, Ned Mohan, Karan Joshi and Aman Behal "voltage Regu... more ... Wiley IEEE press. [4] Amit Jain, Ned Mohan, Karan Joshi and Aman Behal "voltage Regu-lation with STATCOMS:Modeling ,Control and Results." IEEE Transactions on Power Delivery, Vol 21, NO. 2, April 2006 PP 726-734. ... [9] Ronny Sternberger and Dragan Jovic Analytical ...
With growing interconnections along with economic and environmental pressures, the possible threa... more With growing interconnections along with economic and environmental pressures, the possible threat of voltage instability is becoming increasingly pronounced in the power system network. Due to increased use of compensating devices, voltage alone has become a poor indicator of voltage stability. Hence, voltage stability margin or distance to voltage instability point should be considered along with the bus voltage deviation values for contingency selection. In this paper, a novel method employing an analog simulation based neural network, to enhance the speed for determining stability margin for contingency selection, has been suggested
The power factor can be improved and more number of harmonics can be reduced using the pulse widt... more The power factor can be improved and more number of harmonics can be reduced using the pulse width modulation techniques of a voltage waveform. This paper discusses various PWM techniques on the AC/AC voltage controller without DC link. The paper also discusses two configurations of PWM technique for harmonics reduction and improvement of power factor and output voltage. Fast switching device, PWM techniques can be applied to AC/AC voltage controllers for producing variable output voltage with a better input Power Factor. The theoretical results are validated through simulation studies using PSIM software package.
In electrical engineering, load-forecasting have been tried out using most traditional forecastin... more In electrical engineering, load-forecasting have been tried out using most traditional forecasting models and artificial intelligence techniques and have become one of the major research fields. Artificial Neural Networks have lately received much attention, and a great number of papers have reported successful experiments and practical tests with them. This paper presents a new approach for short-term electrical load forecasting on Artificial Neural Network (ANN). The short-term load forecasting has been done with the help of tensor model of Functional-Link Network (FLN). An attempt has been made for forecasting short-term electric load pattern of one hour ahead. This paper also helps to concretize the knowledge how Functional-Link Network is applied for forecasting electric load. The results of the Functional-Link Network show an improved forecast capability.
This paper presents a detailed investigation of controlled Var operation of 12-pulse thyristor co... more This paper presents a detailed investigation of controlled Var operation of 12-pulse thyristor converter operating under asymmetrical firing angle mode. The converter is analyzed for constant active power operation and constant reactive power operation. The effect of source inductance on the operation for controlled p-q is analysezed. The different combinations of firing angles for converter 1 and converter 2 can be found to do such operation. The study shows that the best 12-pulse converter operation condition will be at Var level of 0.5 p.u., without source inductance which provides the widest range of active power control. With source inductance the best operating condition is above 0.5 p.u. The presence of 6p plusmn 1 harmonics in the input current, THDi in the input current is more severe in asymmetrical mode as compared to the equal firing angle mode.
This paper presents a summary of power quality related concerns associated with the applications ... more This paper presents a summary of power quality related concerns associated with the applications of 12-pulse converter with dc motor drives in the industrial plants. These concerns include power system harmonic and harmonic distortion under asymmetrical operation of converter. The converter is also analyzed for constant var operation by considering the effect of source inductance. The effect harmonics is analyzed and simulation has been carried out to mitigate the harmonics using hybrid series active filter using synchronous reference frame theory for 12-pulse converter. The simulation result shows that the supply current THD remains within limit for the total operating range as per IEEE standard.
This work deals with the investigation of harmonics and mitigation of harmonics for the 12-pulse ... more This work deals with the investigation of harmonics and mitigation of harmonics for the 12-pulse converter operation under asymmetrical firing angle mode. The performance of converter is analyzed in unequal firing angle mode and different harmonic patterns are studied. It was found that under equal firing angle the both converter - each six pulse is operating as a twelve pulse converter and the harmonic pattern is as per twelve pulse converter, but if they operate in unequal firing angle mode, the harmonic pattern is as per six pulse converter. To mitigate the harmonics the performance of the converter with passive filter and Hybrid active filter using SRF based algorithm is simulated and the results obtained are as per the IEEE standard. A combined hybrid filter which is a combination of two hybrid filter is simulated using MATLAB. In which one filter is connected in series with the supply and other is connected in series with passive filter. The performance of the supply current h...
This paper deals with the simultaneous application of thyristor controlled series capacitor based... more This paper deals with the simultaneous application of thyristor controlled series capacitor based damping controller and power system stabilizer for stability improvement of dynamic power system. The adaptive neuro-fuzzy inference system and Levenberg-Marquardt artificial neural network algorithm are used to develop the control strategy for thyristor controlled series capacitor based damping controller and power system stabilizer. The power system stabilizer generates appropriate supplementary control signal to an excitation system of synchronous generator to damp the frequency oscillations and improves the performance of the power system dynamic. The performance of power system affected due to the system configuration and load variation. In order to achieve the appreciable damping, the series capacitor is suggested in addition to the power system stabilizer. Nonlinear simulations of single machine infinite bus system are carried out using the individual application of power system ...
This work deals with the investigation of harmonics and mitigation of harmonics for the 12-pulse ... more This work deals with the investigation of harmonics and mitigation of harmonics for the 12-pulse converter operation under asymmetrical firing angle mode. The performance of converter is analyzed in unequal firing angle mode and different harmonic patterns are studied. It was found that under equal firing angle the both converter – each six pulse is operating as a twelve pulse converter and the harmonic pattern is as per twelve pulse converter, but if they operate in unequal firing angle mode , the harmonic pattern is as per six pulse converter. To mitigate the harmonics the performance of the converter with passive filter and Hybrid active filter using P-Q based algorithm is simulated and the results obtained are as per the IEEE standard.
In this paper, the novel approach to design the power system stabilizer using artificial neural n... more In this paper, the novel approach to design the power system stabilizer using artificial neural network based Non Linear Auto Regressive Moving Average-L2 (NARMA-L2) controller has been presented. The controller has been used to generate the appropriate supplementary control signal for the excitation system of synchronous generator. The signal generated has been used to damp the low frequency oscillations and improves the performance of power system dynamics. The analysis of Signal Machine Infinite Bus (SMIB) system has been carried out with NARMA-L2 controller and the performance has been compared with genetics search algorithm based Conventional Power System Stabilizer (CPSS). To reflect the effectiveness of NARMA-L2 based PSS, the non-linear simulations have been performed under various disturbances and different operating conditions.
This paper discusses the design of genetics algorithm based proportional integral derivative-powe... more This paper discusses the design of genetics algorithm based proportional integral derivative-power system stabilizer and Adaptive Neuro Fuzzy Inference System based power system stabilizer for the stability analysis of the single machine infinite bus system. The controller has been used to generate the appropriate supplementary control signal for the excitation system of synchronous generator. The signal generated has been used to damp the low frequency oscillations and improves the performance of power system dynamics. The non- linear simulations of the system has been carried out, which results show the efficacy and capability of two schemes for the design of PSS under the various disturbances and faults conditions.
The mathematical analysis and simulation of shunt active power filter, whose control is based on ... more The mathematical analysis and simulation of shunt active power filter, whose control is based on the “Instantaneous Reactive Power Theory” through PI controller having anti windup integral action has been presented in this work. Results achieved from simulation in PSIM, is verified by implementing the same algorithm into the prototype are presented.
In this paper a three-phase four-wire (3P4W) unified power quality conditioner (UPQC) under disto... more In this paper a three-phase four-wire (3P4W) unified power quality conditioner (UPQC) under distorted load conditions, the power quality problems are compensate through a new synchronous reference frame (SRF) and hysteresis controller based control method. The proposed UPQC system can improve the power quality at the point of common coupling (PCC). The simulation results based on MATLAB Simulink are discussed in detail to support the SRF and hysteresis controller based control method presented in the paper.
Synergism of two intelligent control techniques namely Artificial Neural Network and Genetic Algo... more Synergism of two intelligent control techniques namely Artificial Neural Network and Genetic Algorithm has been presented in this paper. The technique has been implemented to design power system stabilizer. The power system stabilizer designed with help of neural network while the network is optimized by the genetics algorithm. The power system stabilizer has been used to generate the appropriate supplementary control signal for the excitation system of synchronous generator by reduces the low frequency oscillation and improves the performance of the dynamical power system. The effectiveness of design has been tested by non linear simulation of single machine infinite bus system. The results show, the capability and effectiveness of hybrid control algorithm for power system stability improvement under the various disturbances, faults and different operating conditions.
In the competitive electricity market, it is not always possible to discharge all of the contract... more In the competitive electricity market, it is not always possible to discharge all of the contracted power transactions due to congestion in the transmission lines. In most cases, Independent System Operator tries to remove congestion by rescheduling output power of the generators. In this research paper, active and reactive power generator sensitivity factors of the generators to the congested lines have been used to determine the number of generators participating in congestion management. Secondly, Particle Swarm Optimization (PSO) based algorithm has been suggested to minimize the deviations of rescheduled values of active and reactive powers of generators from scheduled values, considering voltage stability enhancement and voltage profile improvement criteria. Thus, rescheduling cost of active power and reactive power were minimized by PSO. The proposed algorithm has been tested on IEEE 30 bus system and results obtained have been compared with previous literature in terms of so...
2016 National Power Systems Conference (NPSC), 2016
Review of theory, application, modelling, and limitations of an electric spring (ES), a custom po... more Review of theory, application, modelling, and limitations of an electric spring (ES), a custom power device, is provided after going through published literature in this field. An ES controls active as well as reactive power and hence can regulate voltage along with power quality enhancement, in the presence of intermittent and unpredictable renewable energy sources. ES is connected in series with part of the total load and can damp out the oscillations of the grid by providing voltage regulation to the load and acts as a smart load. Presence of numerous ES can be visualized in a distribution feeder, acting simultaneously in unison without having any communication within.
India International Conference on Power Electronics 2010 (IICPE2010), 2011
... Wiley IEEE press. [4] Amit Jain, Ned Mohan, Karan Joshi and Aman Behal "voltage Regu... more ... Wiley IEEE press. [4] Amit Jain, Ned Mohan, Karan Joshi and Aman Behal "voltage Regu-lation with STATCOMS:Modeling ,Control and Results." IEEE Transactions on Power Delivery, Vol 21, NO. 2, April 2006 PP 726-734. ... [9] Ronny Sternberger and Dragan Jovic Analytical ...
With growing interconnections along with economic and environmental pressures, the possible threa... more With growing interconnections along with economic and environmental pressures, the possible threat of voltage instability is becoming increasingly pronounced in the power system network. Due to increased use of compensating devices, voltage alone has become a poor indicator of voltage stability. Hence, voltage stability margin or distance to voltage instability point should be considered along with the bus voltage deviation values for contingency selection. In this paper, a novel method employing an analog simulation based neural network, to enhance the speed for determining stability margin for contingency selection, has been suggested
The power factor can be improved and more number of harmonics can be reduced using the pulse widt... more The power factor can be improved and more number of harmonics can be reduced using the pulse width modulation techniques of a voltage waveform. This paper discusses various PWM techniques on the AC/AC voltage controller without DC link. The paper also discusses two configurations of PWM technique for harmonics reduction and improvement of power factor and output voltage. Fast switching device, PWM techniques can be applied to AC/AC voltage controllers for producing variable output voltage with a better input Power Factor. The theoretical results are validated through simulation studies using PSIM software package.
In electrical engineering, load-forecasting have been tried out using most traditional forecastin... more In electrical engineering, load-forecasting have been tried out using most traditional forecasting models and artificial intelligence techniques and have become one of the major research fields. Artificial Neural Networks have lately received much attention, and a great number of papers have reported successful experiments and practical tests with them. This paper presents a new approach for short-term electrical load forecasting on Artificial Neural Network (ANN). The short-term load forecasting has been done with the help of tensor model of Functional-Link Network (FLN). An attempt has been made for forecasting short-term electric load pattern of one hour ahead. This paper also helps to concretize the knowledge how Functional-Link Network is applied for forecasting electric load. The results of the Functional-Link Network show an improved forecast capability.
This paper presents a detailed investigation of controlled Var operation of 12-pulse thyristor co... more This paper presents a detailed investigation of controlled Var operation of 12-pulse thyristor converter operating under asymmetrical firing angle mode. The converter is analyzed for constant active power operation and constant reactive power operation. The effect of source inductance on the operation for controlled p-q is analysezed. The different combinations of firing angles for converter 1 and converter 2 can be found to do such operation. The study shows that the best 12-pulse converter operation condition will be at Var level of 0.5 p.u., without source inductance which provides the widest range of active power control. With source inductance the best operating condition is above 0.5 p.u. The presence of 6p plusmn 1 harmonics in the input current, THDi in the input current is more severe in asymmetrical mode as compared to the equal firing angle mode.
This paper presents a summary of power quality related concerns associated with the applications ... more This paper presents a summary of power quality related concerns associated with the applications of 12-pulse converter with dc motor drives in the industrial plants. These concerns include power system harmonic and harmonic distortion under asymmetrical operation of converter. The converter is also analyzed for constant var operation by considering the effect of source inductance. The effect harmonics is analyzed and simulation has been carried out to mitigate the harmonics using hybrid series active filter using synchronous reference frame theory for 12-pulse converter. The simulation result shows that the supply current THD remains within limit for the total operating range as per IEEE standard.
This work deals with the investigation of harmonics and mitigation of harmonics for the 12-pulse ... more This work deals with the investigation of harmonics and mitigation of harmonics for the 12-pulse converter operation under asymmetrical firing angle mode. The performance of converter is analyzed in unequal firing angle mode and different harmonic patterns are studied. It was found that under equal firing angle the both converter - each six pulse is operating as a twelve pulse converter and the harmonic pattern is as per twelve pulse converter, but if they operate in unequal firing angle mode, the harmonic pattern is as per six pulse converter. To mitigate the harmonics the performance of the converter with passive filter and Hybrid active filter using SRF based algorithm is simulated and the results obtained are as per the IEEE standard. A combined hybrid filter which is a combination of two hybrid filter is simulated using MATLAB. In which one filter is connected in series with the supply and other is connected in series with passive filter. The performance of the supply current h...
This paper deals with the simultaneous application of thyristor controlled series capacitor based... more This paper deals with the simultaneous application of thyristor controlled series capacitor based damping controller and power system stabilizer for stability improvement of dynamic power system. The adaptive neuro-fuzzy inference system and Levenberg-Marquardt artificial neural network algorithm are used to develop the control strategy for thyristor controlled series capacitor based damping controller and power system stabilizer. The power system stabilizer generates appropriate supplementary control signal to an excitation system of synchronous generator to damp the frequency oscillations and improves the performance of the power system dynamic. The performance of power system affected due to the system configuration and load variation. In order to achieve the appreciable damping, the series capacitor is suggested in addition to the power system stabilizer. Nonlinear simulations of single machine infinite bus system are carried out using the individual application of power system ...
This work deals with the investigation of harmonics and mitigation of harmonics for the 12-pulse ... more This work deals with the investigation of harmonics and mitigation of harmonics for the 12-pulse converter operation under asymmetrical firing angle mode. The performance of converter is analyzed in unequal firing angle mode and different harmonic patterns are studied. It was found that under equal firing angle the both converter – each six pulse is operating as a twelve pulse converter and the harmonic pattern is as per twelve pulse converter, but if they operate in unequal firing angle mode , the harmonic pattern is as per six pulse converter. To mitigate the harmonics the performance of the converter with passive filter and Hybrid active filter using P-Q based algorithm is simulated and the results obtained are as per the IEEE standard.
In this paper, the novel approach to design the power system stabilizer using artificial neural n... more In this paper, the novel approach to design the power system stabilizer using artificial neural network based Non Linear Auto Regressive Moving Average-L2 (NARMA-L2) controller has been presented. The controller has been used to generate the appropriate supplementary control signal for the excitation system of synchronous generator. The signal generated has been used to damp the low frequency oscillations and improves the performance of power system dynamics. The analysis of Signal Machine Infinite Bus (SMIB) system has been carried out with NARMA-L2 controller and the performance has been compared with genetics search algorithm based Conventional Power System Stabilizer (CPSS). To reflect the effectiveness of NARMA-L2 based PSS, the non-linear simulations have been performed under various disturbances and different operating conditions.
This paper discusses the design of genetics algorithm based proportional integral derivative-powe... more This paper discusses the design of genetics algorithm based proportional integral derivative-power system stabilizer and Adaptive Neuro Fuzzy Inference System based power system stabilizer for the stability analysis of the single machine infinite bus system. The controller has been used to generate the appropriate supplementary control signal for the excitation system of synchronous generator. The signal generated has been used to damp the low frequency oscillations and improves the performance of power system dynamics. The non- linear simulations of the system has been carried out, which results show the efficacy and capability of two schemes for the design of PSS under the various disturbances and faults conditions.
The mathematical analysis and simulation of shunt active power filter, whose control is based on ... more The mathematical analysis and simulation of shunt active power filter, whose control is based on the “Instantaneous Reactive Power Theory” through PI controller having anti windup integral action has been presented in this work. Results achieved from simulation in PSIM, is verified by implementing the same algorithm into the prototype are presented.
In this paper a three-phase four-wire (3P4W) unified power quality conditioner (UPQC) under disto... more In this paper a three-phase four-wire (3P4W) unified power quality conditioner (UPQC) under distorted load conditions, the power quality problems are compensate through a new synchronous reference frame (SRF) and hysteresis controller based control method. The proposed UPQC system can improve the power quality at the point of common coupling (PCC). The simulation results based on MATLAB Simulink are discussed in detail to support the SRF and hysteresis controller based control method presented in the paper.
Synergism of two intelligent control techniques namely Artificial Neural Network and Genetic Algo... more Synergism of two intelligent control techniques namely Artificial Neural Network and Genetic Algorithm has been presented in this paper. The technique has been implemented to design power system stabilizer. The power system stabilizer designed with help of neural network while the network is optimized by the genetics algorithm. The power system stabilizer has been used to generate the appropriate supplementary control signal for the excitation system of synchronous generator by reduces the low frequency oscillation and improves the performance of the dynamical power system. The effectiveness of design has been tested by non linear simulation of single machine infinite bus system. The results show, the capability and effectiveness of hybrid control algorithm for power system stability improvement under the various disturbances, faults and different operating conditions.
In the competitive electricity market, it is not always possible to discharge all of the contract... more In the competitive electricity market, it is not always possible to discharge all of the contracted power transactions due to congestion in the transmission lines. In most cases, Independent System Operator tries to remove congestion by rescheduling output power of the generators. In this research paper, active and reactive power generator sensitivity factors of the generators to the congested lines have been used to determine the number of generators participating in congestion management. Secondly, Particle Swarm Optimization (PSO) based algorithm has been suggested to minimize the deviations of rescheduled values of active and reactive powers of generators from scheduled values, considering voltage stability enhancement and voltage profile improvement criteria. Thus, rescheduling cost of active power and reactive power were minimized by PSO. The proposed algorithm has been tested on IEEE 30 bus system and results obtained have been compared with previous literature in terms of so...
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