Modeling and control tuning of a hydro station with units sharing a common penstock section

Hannett, L. N.; Feltes, J.W.; Fardanesh, B.; Crean, W.R.

doi:10.1109/59.801904

Cited by 54 publications

(36 citation statements)

References 4 publications

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“…Many different turbine models are used for the modeling of hydraulic turbines. In the literature, several models allowing for a comprehensive investigation of fluid mechanics have been studied and developed, such as linear and nonlinear models, nonlinear models with progressive wave theory, and nonlinear models with progressive wave theory and surge tank [2][3][4][5][6][7][8][9][10][11][12][13][14][20][21][22][23][24][25][26][27][28]. The motion of the water in the penstock, its inertia and compressibility when it hits the turbine blades, and the elastic structure of the penstock naturally cause excessive water fluctuations.…”

Section: Methodsmentioning

confidence: 99%

A new approach to the development of a nonlinear model for micro-Pelton turbines

Özdemir¹,

Orhan²

2015

Turk J Elec Eng & Comp Sci

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Abstract:In this study, a new approach that is closer to the real turbine without abandoning the advantages of nonlinear modeling simplicity compromising the simplicity of the nonlinear model is proposed. The purpose of the study is to contribute to making theoretical studies of microhydroelectric power plants (MHPPs) more realistic. Studies on their control, especially frequency control, have increased with the expansion of grid-connected power plants. However, some problems have occurred when converting simulation studies of the frequency control to practical studies. The reasons for these problems are that the systems cannot be modeled completely. In this study, first, the nonlinear model equations of a Pelton turbine are primarily constituted. The efficiency curve of the turbine is then obtained experimentally and added to the nonlinear model. The simulation results are compared with the data obtained from the prototype MHPP with a Pelton turbine developed in the laboratory. Finally, it is seen that the proposed method is successful. Thus, with the help of the proposed method, theoretical studies that researchers do can be easily converted into practical applications.

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Section: Methodsmentioning

confidence: 99%

A new approach to the development of a nonlinear model for micro-Pelton turbines

Özdemir¹,

Orhan²

2015

Turk J Elec Eng & Comp Sci

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“…The rotor angle associated with each generating unit is measured with respect to a common synchronously rotating pair of orthogonal axes, R and I, associated with the electrical network. These axes will thus rotate [2][3][4][5] at a constant angular speed equal to 2πf 0 electrical radians/s, where f 0 is the system base frequency (60 Hz for U.S. power grids).…”

Section: Generatorsmentioning

confidence: 99%

“…When the wave travel time [3][4] approaches 25% of the T W , engineers should not rely on only the classic value of T W , and the performance of the turbine governing system should be evaluated by considering the effects of both the water starting time and the wave travel time. "…”

Section: Modeling Approachmentioning

confidence: 99%

“…The orifice introduces a damping effect. The lumped parameters [3][4][5][6][7][8] hydraulic system model in HYGOVM is designed to allow detailed simulation of the representation of the surge tank system:…”

Section: Hygovm Modelmentioning

confidence: 99%

“…A representative value for this parameter is 0.125 p.u./s. The maximum gate opening [3][4][5][6][7][8][9] rate (MXGTOR) determines the minimum surge chamber levels when accepting load. A value of 0.1 p.u./s is representative.…”

Section: • Tunnel Dynamicsmentioning

confidence: 99%

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Review of Existing Hydroelectric Turbine-Governor Simulation Models

Feltes¹,

Koritarov²,

Guzowski³

et al. 2013

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The scope of work for the study has two main components: (1) development of vendorneutral dynamic simulation models for advanced pumped storage hydro (PSH) technologies, and (2) production cost and revenue analyses to assess the value of PSH in the power system. Throughout the study, the project team was supported and guided by an Advisory Working Group (AWG) consisting of more than 30 experts from a diverse group of organizations including the hydropower industry and equipment manufacturers, electric power utilities and regional electricity market operators, hydro engineering and consulting companies, national laboratories, universities and research institutions, hydropower industry associations, and government and regulatory agencies.The development of vendor-neutral models was carried out by the Advanced Technology Modeling Task Force Group (TFG) and was led by experts from Siemens PTI with the participation of experts from other project team members. First, the Advanced Technology Modeling TFG reviewed and prepared a summary of the existing dynamic models of hydro and PSH plants that are currently in use in the United States. This is published in the report Review of Existing Hydroelectric Turbine-Governor Simulation Models. The review served to determine the needs for improvements of existing models and for the development of new ones.While it was found that the existing dynamic models for conventional hydro and PSH plants allow for accurate representation and modeling of these technologies, it was concluded that there is a need for the development of dynamic models for two PSH technologies for which there were no existing models available in the United States at the time of the study. Those two technologies are (1) adjustable speed PSH plants employing doubly-fed induction machines (DFIM), and (2) We are all intimately familiar with small energy storage devices; we use batteries of various types in our cell phones and other electronic devices as well as the more traditional batterypowered devices such as flashlights and radios. However, storing large amounts of energy, on the scale that would be useful for a utility-scale power system, has been a much more challenging task. While several new technologies are being developed, pumped storage hydro is the most widely employed method available for storing large amounts of energy to supply electricity. The basic concept of pumped storage is quite simple: electricity is used to pump water up to an elevated reservoir, where the energy can be stored as potential energy until it is needed; then electricity is generated by letting the water flow back down thorough a turbine/generator. Of course, since there is a loss of energy due to the pumping and generating cycle (as low as 10% for some new plants), there must be an economic incentive for the storage, such as a variation in electricity prices between times of pumping and generating.Energy usage is greatly influenced by the normal schedule of people (high during the day when people are most active and low at nigh...

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A new fuzzy sliding mode controller for load frequency control of large hydropower plant using particle swarm optimization algorithm and Kalman estimator

Hooshmand

Ataei

Zargari

2011

Int Trans Elec Energy Syst

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SUMMARY The load frequency control (LFC) is very important in power system operation and control for supplying sufficient, reliable, and high‐quality electric power. The conventional LFC uses an integral controller. In this paper, a new control system based on the fuzzy sliding mode controller is proposed for controlling the load frequency of nonlinear model of a hydropower plant, and this control system is compared with the proportional–integral controller and the conventional sliding mode controller. To regulate the membership functions of fuzzy system more accurately, the particle swarm optimization algorithm is also applied. Moreover, because of the unavailability of the control system variables, a nonlinear estimator is suggested for estimating and identifying the system state variables. This estimator provides the physical realization of the method and will reduce the costs of implementation. The proposed control method is performed for the LFC of hydropower plant of Karoon‐3 in Shahrekord, Iran. The simulation results show the capability of the controller system in controlling local network frequency. Copyright © 2011 John Wiley & Sons, Ltd.

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Modeling and control tuning of a hydro station with units sharing a common penstock section

Cited by 54 publications

References 4 publications

A new approach to the development of a nonlinear model for micro-Pelton turbines

A new approach to the development of a nonlinear model for micro-Pelton turbines

Review of Existing Hydroelectric Turbine-Governor Simulation Models

A new fuzzy sliding mode controller for load frequency control of large hydropower plant using particle swarm optimization algorithm and Kalman estimator

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