The V/f control method is one of speed control methods for induction motors. We have proposed an ... more The V/f control method is one of speed control methods for induction motors. We have proposed an auto-boost voltage method to compensate the voltage drop of stator impedance and a slip frequency compensation method to decrease the speed error caused by the change of load. Torque-speed characteristics and transient responses of proposed system are presented by PSCAD/EMTDC simulations. Compared with the constant V/f control method, speed accuracy of proposed method is improved in various speeds and loads. At last an evaluation of response power quality and losses is presented by evaluating THD of applied current of the motor. Keywords: Elevator Application;induction motor;VVVF drive
2010 1st Power Electronic & Drive Systems & Technologies Conference (PEDSTC), 2010
In this paper, A modified intelligent Particle Swarm Optimization (PSO) and continuous Genetic Al... more In this paper, A modified intelligent Particle Swarm Optimization (PSO) and continuous Genetic Algorithms (GA) have been used for optimal selection of the static synchronous series compensator (SSSC) damping controller parameters in order to improve power system dynamic response and its stability. Then the performance of these methods on system stability has been compared. First intelligent PSO and genetic algorithms are used to select the effective feedback signal of the damping controller and then simulation results are presented to compare the performance of the proposed SSSC controller in damping the critical modes in a Single-Machine Infinite-Bus SMIB power system. The comparison shows that PSO can reach faster than genetic algorithm to optimal selection of the static synchronous series compensator (SSSC) damping controller parameters and has better performance in damping oscillations.
Neighboring of distribution network to the consumers has made it a necessity to study practical p... more Neighboring of distribution network to the consumers has made it a necessity to study practical planning of distribution system in order to manage the whole power losses and improve voltage profile. In this paper the practical planning of distribution system includes the selection of optimal conductor size and capacitor placement in radial distribution network considering increasing rate of loads. Technical operational constraints are available conductors and capacitors, voltage limit, maximum permissible carrying current of conductors and maximum reactive power could be injected. The power loss minimization problem is solved using a combination of GA and PSO, which is called HGAPSO technique. By applying the proposed method, final cost of network planning, losses and their cost are considerably reduced and voltage profile of the network has improved to a semi flat shape. Simulation results are investigated on a 28 bus radial distribution network. As self supporting cables as a new ...
Journal of international Conference on Electrical Machines and Systems, 2012
In this paper, optimal selection of the unified power flow controller (UPFC) damping controller p... more In this paper, optimal selection of the unified power flow controller (UPFC) damping controller parameters in order to improve the power system dynamic response and its stability based on two modified intelligent algorithms have been proposed. These algorithms are based on a modified intelligent particle swarm optimization (PSO) and continuous genetic algorithm (GA). After extraction of UPFC dynamic model, intelligent PSO and genetic algorithms are used to select the effective feedback signal of the damping controller; then, to compare the performance of the proposed UPFC controller in damping the critical modes of a single-machine infinite-bus (SMIB) power system, the simulation results are presented. The comparison shows the good performance of both presented PSO and genetic algorithms in an optimal selection of UPFC damping controller parameters and damping oscillations.
1 blank line using 9-point font with single spacing In this paper the practical planning of distr... more 1 blank line using 9-point font with single spacing In this paper the practical planning of distribution system includes the selection of optimal conductor size and capacitor placement in radial distribution network considering increasing rate of loads. Technical operational constraints are available conductors and capacitors, voltage limit, maximum permissible carrying current of conductors and maximum reactive power could be injected. The power loss minimization problem is solved using particle swarm optimization (PSO). By applying this method, final cost of network planning, losses and their cost are considerably reduced and voltage profile of the network has improved to a semiflat shape. Simulation results are investigated on a practical radial distribution network in Iran (Miandoab 20 kv distribution network), in addition self supporting cables are used for optimization which avoids illegal use of electricity.
2010 1st Power Electronic & Drive Systems & Technologies Conference (PEDSTC), 2010
In this paper, A modified intelligent Particle Swarm Optimization (PSO) and continuous Genetic Al... more In this paper, A modified intelligent Particle Swarm Optimization (PSO) and continuous Genetic Algorithms (GA) have been used for optimal selection of the static synchronous series compensator (SSSC) damping controller parameters in order to improve power system dynamic response and its stability. Then the performance of these methods on system stability has been compared. First intelligent PSO and genetic algorithms are used to select the effective feedback signal of the damping controller and then simulation results are presented to compare the performance of the proposed SSSC controller in damping the critical modes in a Single-Machine Infinite-Bus SMIB power system. The comparison shows that PSO can reach faster than genetic algorithm to optimal selection of the static synchronous series compensator (SSSC) damping controller parameters and has better performance in damping oscillations.
Journal of international Conference on Electrical Machines and Systems, 2012
In this paper, optimal selection of the unified power flow controller (UPFC) damping controller p... more In this paper, optimal selection of the unified power flow controller (UPFC) damping controller parameters in order to improve the power system dynamic response and its stability based on two modified intelligent algorithms have been proposed. These algorithms are based on a modified intelligent particle swarm optimization (PSO) and continuous genetic algorithm (GA). After extraction of UPFC dynamic model, intelligent PSO and genetic algorithms are used to select the effective feedback signal of the damping controller; then, to compare the performance of the proposed UPFC controller in damping the critical modes of a single-machine infinite-bus (SMIB) power system, the simulation results are presented. The comparison shows the good performance of both presented PSO and genetic algorithms in an optimal selection of UPFC damping controller parameters and damping oscillations.
The V/f control method is one of speed control methods for induction motors. We have proposed an ... more The V/f control method is one of speed control methods for induction motors. We have proposed an auto-boost voltage method to compensate the voltage drop of stator impedance and a slip frequency compensation method to decrease the speed error caused by the change of load. Torque-speed characteristics and transient responses of proposed system are presented by PSCAD/EMTDC simulations. Compared with the constant V/f control method, speed accuracy of proposed method is improved in various speeds and loads. At last an evaluation of response power quality and losses is presented by evaluating THD of applied current of the motor. Keywords: Elevator Application;induction motor;VVVF drive
1 blank line using 9-point font with single spacing In this paper the practical planning of distr... more 1 blank line using 9-point font with single spacing In this paper the practical planning of distribution system includes the selection of optimal conductor size and capacitor placement in radial distribution network considering increasing rate of loads. Technical operational constraints are available conductors and capacitors, voltage limit, maximum permissible carrying current of conductors and maximum reactive power could be injected. The power loss minimization problem is solved using particle swarm optimization (PSO). By applying this method, final cost of network planning, losses and their cost are considerably reduced and voltage profile of the network has improved to a semiflat shape. Simulation results are investigated on a practical radial distribution network in Iran (Miandoab 20 kv distribution network), in addition self supporting cables are used for optimization which avoids illegal use of electricity.
2012 Second Iranian Conference on Renewable Energy and Distributed Generation, 2012
*-This paper presents a grid connected photovoltaic system, which acts as both power generator an... more *-This paper presents a grid connected photovoltaic system, which acts as both power generator and active power filter (APF), based on Flying Capacitor Multicell (FCM) converter. Increase in the number of output voltage levels, natural self-balancing of flying capacitors and dc link voltage and lower power rating of components are the main futures of FCM converter compared with conventional multilevel converters. Furthermore, in this paper a new control method based on instantaneous reactive power (IRP) theory and Predictive Current Control using modified phase shifted sinusoidal PWM modulation method has been presented and applied to proposed APF. Also, using a simple method for maximum power point tracking (MPPT), maximum available power of PV array has been injected to system. Finally, the control strategy and the whole system is simulated by PSCAD/EMTDC software and results are presented to validate the performance and advantages of proposed system as well as its control strategy.
In this paper the practical planning of distribution system includes the selection of optimal con... more In this paper the practical planning of distribution system includes the selection of optimal conductor size and capacitor placement in radial distribution network considering increasing rate of loads. Technical operational constraints are available conductors and capacitors, voltage limit, maximum permissible carrying current of conductors and maximum reactive power could be injected. The power loss minimization problem is solved using a hybrid method of genetic algorithm (GA) and particle swarm optimization (PSO), which is called HGAPSO. By applying the proposed method, final cost of network planning, losses and their cost are considerably reduced and voltage profile of the network has improved to a semi flat shape. Simulation results are investigated on a sample radial distribution network. At last the effectiveness of proposed hybrid method is proved comparing the results with obtained results from PSO.
This paper presents the photovoltaic power generation and active filter (PV-AF) system for local ... more This paper presents the photovoltaic power generation and active filter (PV-AF) system for local load supply and harmonic compensation with unbalanced and distorted supply voltage. In this paper a control strategy using vectorial theory proper for any kind of ...
The V/f control method is one of speed control methods for induction motors. We have proposed an ... more The V/f control method is one of speed control methods for induction motors. We have proposed an auto-boost voltage method to compensate the voltage drop of stator impedance and a slip frequency compensation method to decrease the speed error caused by the change of load. Torque-speed characteristics and transient responses of proposed system are presented by PSCAD/EMTDC simulations. Compared with the constant V/f control method, speed accuracy of proposed method is improved in various speeds and loads. At last an evaluation of response power quality and losses is presented by evaluating THD of applied current of the motor. Keywords: Elevator Application;induction motor;VVVF drive
2010 1st Power Electronic & Drive Systems & Technologies Conference (PEDSTC), 2010
In this paper, A modified intelligent Particle Swarm Optimization (PSO) and continuous Genetic Al... more In this paper, A modified intelligent Particle Swarm Optimization (PSO) and continuous Genetic Algorithms (GA) have been used for optimal selection of the static synchronous series compensator (SSSC) damping controller parameters in order to improve power system dynamic response and its stability. Then the performance of these methods on system stability has been compared. First intelligent PSO and genetic algorithms are used to select the effective feedback signal of the damping controller and then simulation results are presented to compare the performance of the proposed SSSC controller in damping the critical modes in a Single-Machine Infinite-Bus SMIB power system. The comparison shows that PSO can reach faster than genetic algorithm to optimal selection of the static synchronous series compensator (SSSC) damping controller parameters and has better performance in damping oscillations.
Neighboring of distribution network to the consumers has made it a necessity to study practical p... more Neighboring of distribution network to the consumers has made it a necessity to study practical planning of distribution system in order to manage the whole power losses and improve voltage profile. In this paper the practical planning of distribution system includes the selection of optimal conductor size and capacitor placement in radial distribution network considering increasing rate of loads. Technical operational constraints are available conductors and capacitors, voltage limit, maximum permissible carrying current of conductors and maximum reactive power could be injected. The power loss minimization problem is solved using a combination of GA and PSO, which is called HGAPSO technique. By applying the proposed method, final cost of network planning, losses and their cost are considerably reduced and voltage profile of the network has improved to a semi flat shape. Simulation results are investigated on a 28 bus radial distribution network. As self supporting cables as a new ...
Journal of international Conference on Electrical Machines and Systems, 2012
In this paper, optimal selection of the unified power flow controller (UPFC) damping controller p... more In this paper, optimal selection of the unified power flow controller (UPFC) damping controller parameters in order to improve the power system dynamic response and its stability based on two modified intelligent algorithms have been proposed. These algorithms are based on a modified intelligent particle swarm optimization (PSO) and continuous genetic algorithm (GA). After extraction of UPFC dynamic model, intelligent PSO and genetic algorithms are used to select the effective feedback signal of the damping controller; then, to compare the performance of the proposed UPFC controller in damping the critical modes of a single-machine infinite-bus (SMIB) power system, the simulation results are presented. The comparison shows the good performance of both presented PSO and genetic algorithms in an optimal selection of UPFC damping controller parameters and damping oscillations.
1 blank line using 9-point font with single spacing In this paper the practical planning of distr... more 1 blank line using 9-point font with single spacing In this paper the practical planning of distribution system includes the selection of optimal conductor size and capacitor placement in radial distribution network considering increasing rate of loads. Technical operational constraints are available conductors and capacitors, voltage limit, maximum permissible carrying current of conductors and maximum reactive power could be injected. The power loss minimization problem is solved using particle swarm optimization (PSO). By applying this method, final cost of network planning, losses and their cost are considerably reduced and voltage profile of the network has improved to a semiflat shape. Simulation results are investigated on a practical radial distribution network in Iran (Miandoab 20 kv distribution network), in addition self supporting cables are used for optimization which avoids illegal use of electricity.
2010 1st Power Electronic & Drive Systems & Technologies Conference (PEDSTC), 2010
In this paper, A modified intelligent Particle Swarm Optimization (PSO) and continuous Genetic Al... more In this paper, A modified intelligent Particle Swarm Optimization (PSO) and continuous Genetic Algorithms (GA) have been used for optimal selection of the static synchronous series compensator (SSSC) damping controller parameters in order to improve power system dynamic response and its stability. Then the performance of these methods on system stability has been compared. First intelligent PSO and genetic algorithms are used to select the effective feedback signal of the damping controller and then simulation results are presented to compare the performance of the proposed SSSC controller in damping the critical modes in a Single-Machine Infinite-Bus SMIB power system. The comparison shows that PSO can reach faster than genetic algorithm to optimal selection of the static synchronous series compensator (SSSC) damping controller parameters and has better performance in damping oscillations.
Journal of international Conference on Electrical Machines and Systems, 2012
In this paper, optimal selection of the unified power flow controller (UPFC) damping controller p... more In this paper, optimal selection of the unified power flow controller (UPFC) damping controller parameters in order to improve the power system dynamic response and its stability based on two modified intelligent algorithms have been proposed. These algorithms are based on a modified intelligent particle swarm optimization (PSO) and continuous genetic algorithm (GA). After extraction of UPFC dynamic model, intelligent PSO and genetic algorithms are used to select the effective feedback signal of the damping controller; then, to compare the performance of the proposed UPFC controller in damping the critical modes of a single-machine infinite-bus (SMIB) power system, the simulation results are presented. The comparison shows the good performance of both presented PSO and genetic algorithms in an optimal selection of UPFC damping controller parameters and damping oscillations.
The V/f control method is one of speed control methods for induction motors. We have proposed an ... more The V/f control method is one of speed control methods for induction motors. We have proposed an auto-boost voltage method to compensate the voltage drop of stator impedance and a slip frequency compensation method to decrease the speed error caused by the change of load. Torque-speed characteristics and transient responses of proposed system are presented by PSCAD/EMTDC simulations. Compared with the constant V/f control method, speed accuracy of proposed method is improved in various speeds and loads. At last an evaluation of response power quality and losses is presented by evaluating THD of applied current of the motor. Keywords: Elevator Application;induction motor;VVVF drive
1 blank line using 9-point font with single spacing In this paper the practical planning of distr... more 1 blank line using 9-point font with single spacing In this paper the practical planning of distribution system includes the selection of optimal conductor size and capacitor placement in radial distribution network considering increasing rate of loads. Technical operational constraints are available conductors and capacitors, voltage limit, maximum permissible carrying current of conductors and maximum reactive power could be injected. The power loss minimization problem is solved using particle swarm optimization (PSO). By applying this method, final cost of network planning, losses and their cost are considerably reduced and voltage profile of the network has improved to a semiflat shape. Simulation results are investigated on a practical radial distribution network in Iran (Miandoab 20 kv distribution network), in addition self supporting cables are used for optimization which avoids illegal use of electricity.
2012 Second Iranian Conference on Renewable Energy and Distributed Generation, 2012
*-This paper presents a grid connected photovoltaic system, which acts as both power generator an... more *-This paper presents a grid connected photovoltaic system, which acts as both power generator and active power filter (APF), based on Flying Capacitor Multicell (FCM) converter. Increase in the number of output voltage levels, natural self-balancing of flying capacitors and dc link voltage and lower power rating of components are the main futures of FCM converter compared with conventional multilevel converters. Furthermore, in this paper a new control method based on instantaneous reactive power (IRP) theory and Predictive Current Control using modified phase shifted sinusoidal PWM modulation method has been presented and applied to proposed APF. Also, using a simple method for maximum power point tracking (MPPT), maximum available power of PV array has been injected to system. Finally, the control strategy and the whole system is simulated by PSCAD/EMTDC software and results are presented to validate the performance and advantages of proposed system as well as its control strategy.
In this paper the practical planning of distribution system includes the selection of optimal con... more In this paper the practical planning of distribution system includes the selection of optimal conductor size and capacitor placement in radial distribution network considering increasing rate of loads. Technical operational constraints are available conductors and capacitors, voltage limit, maximum permissible carrying current of conductors and maximum reactive power could be injected. The power loss minimization problem is solved using a hybrid method of genetic algorithm (GA) and particle swarm optimization (PSO), which is called HGAPSO. By applying the proposed method, final cost of network planning, losses and their cost are considerably reduced and voltage profile of the network has improved to a semi flat shape. Simulation results are investigated on a sample radial distribution network. At last the effectiveness of proposed hybrid method is proved comparing the results with obtained results from PSO.
This paper presents the photovoltaic power generation and active filter (PV-AF) system for local ... more This paper presents the photovoltaic power generation and active filter (PV-AF) system for local load supply and harmonic compensation with unbalanced and distorted supply voltage. In this paper a control strategy using vectorial theory proper for any kind of ...
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