Stability of a Hydraulic Turbine Generating Unit Controlled by P.I.D. Governor

Hagihara, Shiro; Yokota, Hiroshi; Goda, Katsuichiro; Isobe, Kenji

doi:10.1109/tpas.1979.319429

Cited by 91 publications

(50 citation statements)

References 3 publications

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“…The name given to the most commonly used dynamic model for synchronous generators with a salient rotor design is GENSAL, and that used for round rotor design is GENROU. The magnetic saturation of the stator and rotor iron used with these models is described by a quadratic function (an exponential function is also [2][3] used in other similar models). In addition, the combined inertia of all equipment mounted on the unit shaft system (generator, turbine, and exciter, if it is of the rotating type) is used in these models.…”

Section: Generatorsmentioning

confidence: 99%

“…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%

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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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Section: Generatorsmentioning

confidence: 99%

Section: Generatorsmentioning

confidence: 99%

Section: Modeling Approachmentioning

confidence: 99%

Section: Hygovm Modelmentioning

confidence: 99%

See 2 more Smart Citations

Review of Existing Hydroelectric Turbine-Governor Simulation Models

Feltes¹,

Koritarov²,

Guzowski³

et al. 2013

View full text Add to dashboard Cite

show abstract

“…The influence of the turbine governor gains on the stability of the primary LFC loop of a hydropower plant was further studied several years ago [16][17][18]; most of these stability studies were carried out on the basis of a small disturbance analysis [15]. Secondary LFC maneuvers can be hardly considered small disturbances.…”

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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Automatic Generation Control

2023

Graph Database and Graph Computing for Power System Analysis

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Stability of a Hydraulic Turbine Generating Unit Controlled by P.I.D. Governor

Cited by 91 publications

References 3 publications

Review of Existing Hydroelectric Turbine-Governor Simulation Models

Review of Existing Hydroelectric Turbine-Governor Simulation Models

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

Automatic Generation Control

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