Green power generated from tidal turbine generators has the capacity to reduce the pressure world... more Green power generated from tidal turbine generators has the capacity to reduce the pressure world energy demand. It is important to apply and investigate tidal power optimization methods to improve power production which can prove difficult based on the dynamics of tidal wakes and inflow directions. In order to optimized the tidal power production, we have proposed a new formulation of a robust control mechanism for optimizing tidal generator turbine array within a tidal farm with different tidal inflow directions in respect to the weight of tidal inflow. This combines the higher-delity RANS of PDE-based flow models with the use of adjoint based optimization techniques. The result is verified using OpenTidalFarm software.
The fundamental goal of this paper is to utilize a predictive control technique to enhance the st... more The fundamental goal of this paper is to utilize a predictive control technique to enhance the stability of tidal power systems in the presence of tidal farms based on a permanent magnet synchronous generator (PMSG), utilizing Static Synchronous Series Compensator (SSSC) and Super Capacitor Energy Storage System (SCESS). In this paper, SCESS is utilized to control the active power in the Grid Side Converter and SSSC is utilized to diminish low frequency oscillations. The proposed technique is based on the predictive control can be concurrently utilized to control the active and reactive power of the generator Side Converter and in addition controls the damping controller design for SCESS and SSSC. An objective function is utilized as in the predictive control system to decrease computational difficulty in choosing the input paths of Laguerre functions. In addition, the sampling time is decreased by utilizing exponential data weighting. Simulation results for the function-based predictive control utilizing disturbance situations in the field of non-linear time are contrasted and the other two techniques, model predictive control and classic model (PI controller). The potency of the proposed technique in enhancing the stability of the tidal power system is confirmed via simulation.
Concern over global climate change has led policy makers to accept the importance of reducing gre... more Concern over global climate change has led policy makers to accept the importance of reducing greenhouse gas emissions. This in turn has led to a large growth in clean renewable generation for electricity production. Much emphasis has been on wind generation as it is among the most advanced forms of renewable generation, however, its variable and relatively unpredictable nature result in increased challenges for electricity system operators. Tidal generation on the other hand is almost perfectly forecastable and as such may be a viable alternative to wind generation. This thesis paper shows the important of Tidal power over other sources and it’s generation using DFIG. This thesis is analyzed based on the following configuration; A 6 MW tidal power site having four, 1.5 MW tidal turbines connected to a 25 kV distribution system which ensures power to a 120 kV grid through a 30 km, 25 kV feeder line. A 2300V, 2 MVA plant with a motor load (1.68 MW induction motor at 0.93 pf) and of a 200 kW resistive load which is also linked into the same feeder. Both tidal turbine and motor is attached to a protection system which was used to monitor voltage, current and machine speed. DFIG DC link voltage is also monitored. Tidal turbines used an induction generator having a wound rotor and an AC/DC/AC IGBT based PWM converter. The stator winding is also linked directly to the 50 Hz grid and the rotor is fed at variable frequency through the AC/DC/AC converter. DFIG technology was also used for extraction of maximum energy from the tides for low tidal speeds through optimization of turbine speed, while lowering turbine mechanical stresses during heavy tides. The turbine’s optimum speed used to produce maximum mechanical energy for a given tidal speed which is directly proportional to tidal speed. The rotor runs at sub synchronous speed for tidal speeds will also be lowered at 10 m/s and at super synchronous speeds for higher tidal speeds. The simulation of 6MW tidal site was carried out for normal condition and at different types of faults introduced on the 25kV line. They are carried out as follows; a) For normal conditions, at a tidal speed of 13m/s. b) For a phase A to ground fault in the 25 kV line for t=5 to 5.1 seconds. c) For a phase A and B fault in the 25 kV line t=5 to 5.1 seconds. d) For a phase A and B to ground fault in the 25 kV line t=5 to 5.1 seconds. e) For a symmetric fault in the 25kV line for t=5 to 5.1 seconds
In order to avoid a reduction in energy supply for power distribution, it is important to have a ... more In order to avoid a reduction in energy supply for power distribution, it is important to have a control technique to achieve maximum power output from a tidal farm. It is of paramount importance to checkmate the performance of ocean tides inflow dynamics, due to its effect on power generated from a tidal farm. The functional environment of tidal turbines is important for its performance and the recovery of tidal wake. Therefore, an optimization algorithm is proposed using a gradient-based optimization method is used to optimize the minimum power generated from a tidal turbine array of 36 turbines. The minimum power production from a tidal farm with 36 turbines at a tidal speed of 5m/s was optimized to achieve 49.28 MW which is a 76 percent increase. The simulation results and the tidal farm composition were done using Finite Volume Community Ocean Model (FVCOM) software.
Concern over global climate change has led policy makers to accept the importance of reducing gre... more Concern over global climate change has led policy makers to accept the importance of reducing greenhouse gas emissions. This in turn has led to a large growth in clean renewable generation for electricity production. Much emphasis has been on wind generation as it is among the most advanced forms of renewable generation, however, its variable and relatively unpredictable nature result in increased challenges for electricity system operators. Tidal generation on the other hand is almost perfectly forecastable and as such may be a viable alternative to wind generation. This thesis paper shows the important of Tidal power over other sources and it’s generation using DFIG. This thesis is analyzed based on the following configuration; A 6 MW tidal power site having four, 1.5 MW tidal turbines connected to a 25 kV distribution system which ensures power to a 120 kV grid through a 30 km, 25 kV feeder line. A 2300V, 2 MVA plant with a motor load (1.68 MW induction motor at 0.93 pf) and of a 200 kW resistive load which is also linked into the same feeder. Both tidal turbine and motor is attached to a protection system which was used to monitor voltage, current and machine speed. DFIG DC link voltage is also monitored. Tidal turbines used an induction generator having a wound rotor and an AC/DC/AC IGBT based PWM converter. The stator winding is also linked directly to the 50 Hz grid and the rotor is fed at variable frequency through the AC/DC/AC converter. DFIG technology was also used for extraction of maximum energy from the tides for low tidal speeds through optimization of turbine speed, while lowering turbine mechanical stresses during heavy tides. The turbine’s optimum speed used to produce maximum mechanical energy for a given tidal speed which is directly proportional to tidal speed. The rotor runs at sub synchronous speed for tidal speeds will also be lowered at 10 m/s and at super synchronous speeds for higher tidal speeds. The simulation of 6MW tidal site was carried out for normal condition and at different types of faults introduced on the 25kV line. They are carried out as follows; a) For normal conditions, at a tidal speed of 13m/s. b) For a phase A to ground fault in the 25 kV line for t=5 to 5.1 seconds. c) For a phase A and B fault in the 25 kV line t=5 to 5.1 seconds. d) For a phase A and B to ground fault in the 25 kV line t=5 to 5.1 seconds. e) For a symmetric fault in the 25kV line for t=5 to 5.1 seconds
Green power generated from tidal turbine generators has the capacity to reduce the pressure world... more Green power generated from tidal turbine generators has the capacity to reduce the pressure world energy demand. It is important to apply and investigate tidal power optimization methods to improve power production which can prove difficult based on the dynamics of tidal wakes and inflow directions. In order to optimized the tidal power production, we have proposed a new formulation of a robust control mechanism for optimizing tidal generator turbine array within a tidal farm with different tidal inflow directions in respect to the weight of tidal inflow. This combines the higher-delity RANS of PDE-based flow models with the use of adjoint based optimization techniques. The result is verified using OpenTidalFarm software.
The fundamental goal of this paper is to utilize a predictive control technique to enhance the st... more The fundamental goal of this paper is to utilize a predictive control technique to enhance the stability of tidal power systems in the presence of tidal farms based on a permanent magnet synchronous generator (PMSG), utilizing Static Synchronous Series Compensator (SSSC) and Super Capacitor Energy Storage System (SCESS). In this paper, SCESS is utilized to control the active power in the Grid Side Converter and SSSC is utilized to diminish low frequency oscillations. The proposed technique is based on the predictive control can be concurrently utilized to control the active and reactive power of the generator Side Converter and in addition controls the damping controller design for SCESS and SSSC. An objective function is utilized as in the predictive control system to decrease computational difficulty in choosing the input paths of Laguerre functions. In addition, the sampling time is decreased by utilizing exponential data weighting. Simulation results for the function-based predictive control utilizing disturbance situations in the field of non-linear time are contrasted and the other two techniques, model predictive control and classic model (PI controller). The potency of the proposed technique in enhancing the stability of the tidal power system is confirmed via simulation.
Concern over global climate change has led policy makers to accept the importance of reducing gre... more Concern over global climate change has led policy makers to accept the importance of reducing greenhouse gas emissions. This in turn has led to a large growth in clean renewable generation for electricity production. Much emphasis has been on wind generation as it is among the most advanced forms of renewable generation, however, its variable and relatively unpredictable nature result in increased challenges for electricity system operators. Tidal generation on the other hand is almost perfectly forecastable and as such may be a viable alternative to wind generation. This thesis paper shows the important of Tidal power over other sources and it’s generation using DFIG. This thesis is analyzed based on the following configuration; A 6 MW tidal power site having four, 1.5 MW tidal turbines connected to a 25 kV distribution system which ensures power to a 120 kV grid through a 30 km, 25 kV feeder line. A 2300V, 2 MVA plant with a motor load (1.68 MW induction motor at 0.93 pf) and of a 200 kW resistive load which is also linked into the same feeder. Both tidal turbine and motor is attached to a protection system which was used to monitor voltage, current and machine speed. DFIG DC link voltage is also monitored. Tidal turbines used an induction generator having a wound rotor and an AC/DC/AC IGBT based PWM converter. The stator winding is also linked directly to the 50 Hz grid and the rotor is fed at variable frequency through the AC/DC/AC converter. DFIG technology was also used for extraction of maximum energy from the tides for low tidal speeds through optimization of turbine speed, while lowering turbine mechanical stresses during heavy tides. The turbine’s optimum speed used to produce maximum mechanical energy for a given tidal speed which is directly proportional to tidal speed. The rotor runs at sub synchronous speed for tidal speeds will also be lowered at 10 m/s and at super synchronous speeds for higher tidal speeds. The simulation of 6MW tidal site was carried out for normal condition and at different types of faults introduced on the 25kV line. They are carried out as follows; a) For normal conditions, at a tidal speed of 13m/s. b) For a phase A to ground fault in the 25 kV line for t=5 to 5.1 seconds. c) For a phase A and B fault in the 25 kV line t=5 to 5.1 seconds. d) For a phase A and B to ground fault in the 25 kV line t=5 to 5.1 seconds. e) For a symmetric fault in the 25kV line for t=5 to 5.1 seconds
In order to avoid a reduction in energy supply for power distribution, it is important to have a ... more In order to avoid a reduction in energy supply for power distribution, it is important to have a control technique to achieve maximum power output from a tidal farm. It is of paramount importance to checkmate the performance of ocean tides inflow dynamics, due to its effect on power generated from a tidal farm. The functional environment of tidal turbines is important for its performance and the recovery of tidal wake. Therefore, an optimization algorithm is proposed using a gradient-based optimization method is used to optimize the minimum power generated from a tidal turbine array of 36 turbines. The minimum power production from a tidal farm with 36 turbines at a tidal speed of 5m/s was optimized to achieve 49.28 MW which is a 76 percent increase. The simulation results and the tidal farm composition were done using Finite Volume Community Ocean Model (FVCOM) software.
Concern over global climate change has led policy makers to accept the importance of reducing gre... more Concern over global climate change has led policy makers to accept the importance of reducing greenhouse gas emissions. This in turn has led to a large growth in clean renewable generation for electricity production. Much emphasis has been on wind generation as it is among the most advanced forms of renewable generation, however, its variable and relatively unpredictable nature result in increased challenges for electricity system operators. Tidal generation on the other hand is almost perfectly forecastable and as such may be a viable alternative to wind generation. This thesis paper shows the important of Tidal power over other sources and it’s generation using DFIG. This thesis is analyzed based on the following configuration; A 6 MW tidal power site having four, 1.5 MW tidal turbines connected to a 25 kV distribution system which ensures power to a 120 kV grid through a 30 km, 25 kV feeder line. A 2300V, 2 MVA plant with a motor load (1.68 MW induction motor at 0.93 pf) and of a 200 kW resistive load which is also linked into the same feeder. Both tidal turbine and motor is attached to a protection system which was used to monitor voltage, current and machine speed. DFIG DC link voltage is also monitored. Tidal turbines used an induction generator having a wound rotor and an AC/DC/AC IGBT based PWM converter. The stator winding is also linked directly to the 50 Hz grid and the rotor is fed at variable frequency through the AC/DC/AC converter. DFIG technology was also used for extraction of maximum energy from the tides for low tidal speeds through optimization of turbine speed, while lowering turbine mechanical stresses during heavy tides. The turbine’s optimum speed used to produce maximum mechanical energy for a given tidal speed which is directly proportional to tidal speed. The rotor runs at sub synchronous speed for tidal speeds will also be lowered at 10 m/s and at super synchronous speeds for higher tidal speeds. The simulation of 6MW tidal site was carried out for normal condition and at different types of faults introduced on the 25kV line. They are carried out as follows; a) For normal conditions, at a tidal speed of 13m/s. b) For a phase A to ground fault in the 25 kV line for t=5 to 5.1 seconds. c) For a phase A and B fault in the 25 kV line t=5 to 5.1 seconds. d) For a phase A and B to ground fault in the 25 kV line t=5 to 5.1 seconds. e) For a symmetric fault in the 25kV line for t=5 to 5.1 seconds
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Papers by Daniel Obaleye
This thesis is analyzed based on the following configuration;
A 6 MW tidal power site having four, 1.5 MW tidal turbines connected to a 25 kV distribution system which ensures power to a 120 kV grid through a 30 km, 25 kV feeder line. A 2300V, 2 MVA plant with a motor load (1.68 MW induction motor at 0.93 pf) and of a 200 kW resistive load which is also linked into the same feeder. Both tidal turbine and motor is attached to a protection system which was used to monitor voltage, current and machine speed. DFIG DC link voltage is also monitored. Tidal turbines used an induction generator having a wound rotor and an AC/DC/AC IGBT based PWM converter. The stator winding is also linked directly to the 50 Hz grid and the rotor is fed at variable frequency through the AC/DC/AC converter. DFIG technology was also used for extraction of maximum energy from the tides for low tidal speeds through optimization of turbine speed, while lowering turbine mechanical stresses during heavy tides. The turbine’s optimum speed used to produce maximum mechanical energy for a given tidal speed which is directly proportional to tidal speed. The rotor runs at sub synchronous speed for tidal speeds will also be lowered at 10 m/s and at super synchronous speeds for higher tidal speeds.
The simulation of 6MW tidal site was carried out for normal condition and at different types of faults introduced on the 25kV line. They are carried out as follows;
a) For normal conditions, at a tidal speed of 13m/s.
b) For a phase A to ground fault in the 25 kV line for t=5 to 5.1 seconds.
c) For a phase A and B fault in the 25 kV line t=5 to 5.1 seconds.
d) For a phase A and B to ground fault in the 25 kV line t=5 to 5.1 seconds.
e) For a symmetric fault in the 25kV line for t=5 to 5.1 seconds
This thesis is analyzed based on the following configuration;
A 6 MW tidal power site having four, 1.5 MW tidal turbines connected to a 25 kV distribution system which ensures power to a 120 kV grid through a 30 km, 25 kV feeder line. A 2300V, 2 MVA plant with a motor load (1.68 MW induction motor at 0.93 pf) and of a 200 kW resistive load which is also linked into the same feeder. Both tidal turbine and motor is attached to a protection system which was used to monitor voltage, current and machine speed. DFIG DC link voltage is also monitored. Tidal turbines used an induction generator having a wound rotor and an AC/DC/AC IGBT based PWM converter. The stator winding is also linked directly to the 50 Hz grid and the rotor is fed at variable frequency through the AC/DC/AC converter. DFIG technology was also used for extraction of maximum energy from the tides for low tidal speeds through optimization of turbine speed, while lowering turbine mechanical stresses during heavy tides. The turbine’s optimum speed used to produce maximum mechanical energy for a given tidal speed which is directly proportional to tidal speed. The rotor runs at sub synchronous speed for tidal speeds will also be lowered at 10 m/s and at super synchronous speeds for higher tidal speeds.
The simulation of 6MW tidal site was carried out for normal condition and at different types of faults introduced on the 25kV line. They are carried out as follows;
a) For normal conditions, at a tidal speed of 13m/s.
b) For a phase A to ground fault in the 25 kV line for t=5 to 5.1 seconds.
c) For a phase A and B fault in the 25 kV line t=5 to 5.1 seconds.
d) For a phase A and B to ground fault in the 25 kV line t=5 to 5.1 seconds.
e) For a symmetric fault in the 25kV line for t=5 to 5.1 seconds