Nonlinear Digital Simulation Model of Hydroelectric Power Unit With Kaplan Turbine

Brezovec, Miljenko; Kuzle, Igor; Tomiša, Tomislav

doi:10.1109/tec.2005.847963

Cited by 32 publications

(25 citation statements)

References 9 publications

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“…A non-linear model of the system, composed by the turbine and the diversion canal, has been considered [8,9]. The basic equation of water flow variation (assuming water as an uncompressible fluid) is:…”

Section: Model Of the Hydraulic System And Turbine Inletmentioning

confidence: 99%

Innovative Control Strategy for Islanded Small Hydro Power Plant

Caldon¹,

Pasut²

2014

JEPE

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Abstract:In many developing countries, there are regions where the electrical grid is weak or nonexistent. However, in these areas, large amounts of distributed energy sources, such as hydro, are often available and could be suitably exploited. To this aim, the low head hydro power plants can play a significant role. In fact, recent technological advances in mini-hydro turbines and decreasing costs of static electricity conversion devices enable to realize suitable power plants for an efficient and profitable exploitation of these sites. One of the major challenges is the integration of the above-mentioned power plants into autonomous electrical systems, islanded and/or disconnectable from the main distribution network. In this paper, an innovative control strategy for a low head hydro power plant supplying users in small clusters of villages is proposed.

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Section: Model Of the Hydraulic System And Turbine Inletmentioning

confidence: 99%

Innovative Control Strategy for Islanded Small Hydro Power Plant

Caldon¹,

Pasut²

2014

JEPE

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“…As stated in [12], simulation models play an important role in the upgrading process of old hydropower plants. In [13], simulation was used for the design of an automatic water level control system in a low-head small hydropower plant that had been refurbished several years ago.…”

Section: Introductionmentioning

confidence: 99%

Failures during Load-Frequency Control Maneuvers in an Upgraded Hydropower Plant: Causes, Identification of Causes and Solution Proposals

Pérez‐Díaz

Moreno

2015

Energies

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Abstract:The objective of this paper is to investigate the cause of several unexpected high amplitude oscillations that occurred in the surge tank water level of a real hydropower plant during secondary load-frequency control (LFC) maneuvers, after the replacement of the turbine runner, and to propose solutions that allow the power plant to continue providing secondary LFC in a safe and reliable manner. For this purpose, a simulation model has been developed and calibrated from data gathered during several on-site tests. Two different solutions are proposed in order to cope with the observed problem: using a state-dependent load change rate limiter or modifying the hydro turbine governor gains; the turbine governor remains the same as before the runner replacement. The proposed solutions are tested against a set of realistic secondary LFC signals by means of simulations and compared to each other as a function of the probability that the surge tank water level descends below a minimum safe level and the quality of the secondary LFC response. The results presented in the paper demonstrate the validity of the methodology proposed to determine the state-dependent ramp limit, as well as its effectiveness to prevent the surge tank drawdown and to provide clear insight into the trade-off between response quality and power plant safety.

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“…Fig. 2 shows typical basic blocks for modeling a double regulated Kaplan Hydro Power plant [4]. The controller inputs are the reference operating speed (ω re f ), the reference electrical power (P re f ), the water head (h), the current speed (ω), and the generated Electrical power (P e ).…”

Section: Introductionmentioning

confidence: 99%

“…The second control block is called combinator (shortly CAM). It is a look up table that has the head and the guide vanes angle as input and the set point of optimum runner blade angle as output (y r,re f ) [4], [5]. This set point is fed to the runner blade controller.…”

Section: Introductionmentioning

confidence: 99%

Phasor extremum seeking and its application in Kaplan turbine control

Atta

Johansson

Cervantes

et al. 2014

2014 IEEE Conference on Control Applications (CCA)

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The Combinator is an important part in Kaplan turbine control. It ensures that the turbine will operate in an optimum way, in terms of maximum efficiency of the plant. This work suggests a new sinusoidal perturbation based extremum seeking algorithm based on the phasor of the output. We propose to use this algorithm for generating the required data to build and correct the combinator. Simulations are presented showing the applicability of the proposed methods.

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Nonlinear Digital Simulation Model of Hydroelectric Power Unit With Kaplan Turbine

Cited by 32 publications

References 9 publications

Innovative Control Strategy for Islanded Small Hydro Power Plant

Innovative Control Strategy for Islanded Small Hydro Power Plant

Failures during Load-Frequency Control Maneuvers in an Upgraded Hydropower Plant: Causes, Identification of Causes and Solution Proposals

Phasor extremum seeking and its application in Kaplan turbine control

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