Nonlinear Digital Simulation Model of Hydroelectric Power Unit With Kaplan Turbine

2006 ◽  
Vol 21 (1) ◽  
pp. 235-241 ◽  
Author(s):  
M. Brezovec ◽  
I. Kuzle ◽  
T. Tomisa
Keyword(s):  
Simulation Model ◽  
Power Unit ◽  
Digital Simulation ◽  
Hydroelectric Power ◽  
Kaplan Turbine

Digital Simulation of Impact Phenomenon in Spur Gear Systems

1977 ◽  
Vol 99 (3) ◽  
pp. 792-798 ◽  
Author(s):  
R. C. Azar ◽  
F. R. E. Crossley
Keyword(s):  
Simulation Model ◽  
Digital Simulation ◽  
Spur Gear ◽  
Gear Pair ◽  
Frequency Spectra ◽  
Similar Frequency ◽  
Gear Teeth ◽  
Tooth Form ◽  
Stiffness And Damping ◽  
Clearance Model

A digital simulation model is developed to represent a lightly loaded geared torsional system consisting of a drive unit, spur gear pair and load connected by flexible shafts. A clearance model called an Impact Pair [13] is used to represent the gear pair and includes the effects of backlash, time-varying stiffness and damping of the gear teeth and tooth-form error. Experimentally determined frequency spectra of the torsional oscillations of a gear-driven shaft have been plotted and reported on earlier [1]. Similar frequency plots are obtained from the simulation study, and data from these plots are compared with the experimental results for a variety of parameter changes including shaft speed, backlash and load. Results indicate that the simulation model portrays reasonably well the torsional behavior of the output shaft.

scholarly journals Development of a simulation model of HPPs chain operation

2020 ◽  
Vol 191 ◽  
pp. 02004
Author(s):  
Alexandra Khalyasmaa ◽  
Stanislav Eroshenko ◽  
Sergey Mitrofanov ◽  
Anastasia Rusina ◽  
Anna Arestova ◽  
...  
Keyword(s):  
Power Systems ◽  
Simulation Model ◽  
Power Plants ◽  
River Flow ◽  
Water Pressure ◽  
Operation Mode ◽  
Flow Characteristics ◽  
Time Lags ◽  
Hydroelectric Power ◽  
Hydro Power

The paper presents a simulation model of a hydroelectric power plants chain. The model allows solving the problem of hydro power plants (HPPs) operation mode planning in a unified power system, taking into account the optimization of water resources. The optimal filling and decrease of storage was performed in MATLAB Simulink software. The hydraulic properties of the river flow between the stations and the corresponding time lags in the functioning of the down-river station are taken into account. The model allows continuously monitoring changes in water pressure at hydropower plants and, as a result, uses the family of flow characteristics for various water pressures. The issues of optimizing the participation of hydroelectric power stations in the regimes of large hydrothermal power systems were also raised.

A Hydroelectric Plant Simulation Model to Test the Performance of Actual Governor Control Systems

2008 ◽  
Author(s):  
Iva´n F. Galindo-Garci´a ◽  
Antonio Tavira-Mondrago´n ◽  
Sau´l Rodri´guez-Lozano
Keyword(s):  
Power Plant ◽  
Simulation Model ◽  
Control Systems ◽  
Real Time ◽  
Hydraulic System ◽  
Hydroelectric Plant ◽  
Field Tests ◽  
Hydroelectric Power Plant ◽  
Hydroelectric Power ◽  
Surge Tank

A simulation model of the hydraulic system of a hydroelectric power plant is developed and implemented in a real time simulator. The main purpose of the simulator is to test the performance of actual governor control systems using hardware-in-the-loop techniques, in which the actual governor control system is connected to a real time simulator instead of being connected to real equipment. This paper focuses on the modeling of the hydraulic system to be implemented in the simulator. The model consists of an unrestricted reservoir, conduits to transport water, and a turbine to convert the potential energy of the fluid into mechanical power. A nonlinear mathematical model for a non-elastic water column is implemented. Effects due to a surge tank and to various turbines connected to a common tunnel are included in the model by considering head and flow variations at the junction of the common tunnel and the individual penstocks. The model is evaluated by comparing results from simulations with field tests from a four-unit hydroelectric power plant (55 MW per unit). Comparisons show that the model reproduces the general behavior of the field tests. However some deviations are observed during the transient response, in particular the simulation results appear to respond faster than field data.

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