Analysis and Improvement of the Stability of a Hydro-Turbine Generating Unit With Long Penstock

Murty, M. S. R.; Hariharan, M. V.

doi:10.1109/tpas.1984.318252

Cited by 27 publications

(7 citation statements)

References 9 publications

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“…Murty et al [5] extended Hagihara et al works by considering the influence of water column elasticity on the stability boundaries of the hydraulic unit with long penstock operating on an isolated load with an additional parameter …”

Section: Stability Of Hydraulic Turbine Generating Unitmentioning

confidence: 98%

Modelling of hydraulic turbine for dynamic studies and performance analysis

Choo

Muttaqi

Negnevitsky

2007

2007 Australasian Universities Power Engineering Conference

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Classical ideal lossless representation of the hydraulic turbine has been used widely in the past for governor stability studies. This model is suitable for small perturbations around the initial operating condition, and approximates to the practical turbine characteristics at low frequencies only. For satisfactory fast response and stable operation of governor studies, this classical model may not be adequate, rather a more accurate modelling of the turbine-penstock characteristics is desired to capture and depict the essential dynamic performances for wide variety of system analyses. In this paper, a hydraulic turbine model with long penstock is represented where the water hammer effects and friction are taken in consideration. A detailed hydraulic turbine-penstock utilised for governing stability studies is used to analyse the transient response when subject to a load disturbance. Frequency response analysis as well as transient response analysis is performed to evaluate the effects of the detailed modelling of the turbine-penstock to the stability analyses and the dynamic performances. Index Terms--Governors, Hydraulic Systems, Hydraulic Turbine-Penstock Model, Stability VII. BIOGRAPHIESYin Chin Choo was born in Malaysia in 1983. She received her B.E. (Hons.) from the University of Tasmania, Australia, in 2005. She is currently pursuing the Ph.D. degree at the University of Tasmania. Her special fields of interests are power system analysis, hydroelectric turbines, power system stability and power system planning, operation and control.

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Section: Stability Of Hydraulic Turbine Generating Unitmentioning

confidence: 98%

Modelling of hydraulic turbine for dynamic studies and performance analysis

Choo

Muttaqi

Negnevitsky

2007

2007 Australasian Universities Power Engineering Conference

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“…[53][54][55][56][57][58][59][60][61][62] (3) Stability and instability of turbine, Refs. [45][46][47][48] Combined operating conditions, Refs. [63,64] (4) Hydraulic transient simulation, Refs.…”

Section: Work Of the Authors' Research Team Work Of Others Around Thementioning

confidence: 99%

“…Martínez-Lucas et al studied the frequency control support of a wind-solar isolated system Energies 2018, 11, 2994 5 of 27 by a hydropower plant with a long tail-race tunnel [43], and analyzed the power-frequency control of hydropower plants with long penstocks in isolated systems with wind generation [44]. Chen [45] and Murty et al [46] studied the stability of hydro-turbine generating units with a long penstock or diversion tunnel. Ruud [47] studied the instability of a hydraulic turbine with a very long penstock.…”

Section: Introductionmentioning

confidence: 99%

A Review of the Transient Process and Control for a Hydropower Station with a Super Long Headrace Tunnel

Guo

Zhu

2018

Energies

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The hydropower station with a super long headrace tunnel is a significant development type for hydropower energy. By constructing a super long headrace tunnel, the huge natural water fall head can be utilized to generate more electricity. With the development of hydropower energy, a hydropower station with a super long headrace tunnel becomes more and more competitive. Compared with a hydropower station with a short headrace tunnel, the transient process and control for a hydropower station with a super long headrace tunnel is much more complicated and becomes an intractable challenge. It is well known that the transient process and control is the basis of the design and operation of a hydropower station. To overcome the challenge of the transient process and control, much research has been carried out. This paper provides a systematic review on the latest research progress of the transient process and control for hydropower stations with a super long headrace tunnel. Firstly, two key issues for the transient process and control, i.e., hydraulic design optimization of the surge tank and operation control of unit, are illuminated. Secondly, for both single surge tanks and surge tanks with special types or combinations, the hydraulic design optimization methods are described. The most disadvantageous design and advantageous operation of surge tanks under combined operating conditions are discussed. Thirdly, the stability and regulation quality of the hydro-turbine governing system under isolated and grid-connected operation conditions are presented. Finally, some trends and recommendations for future research directions are made. A research thought for establishing the complete theory and application system of the transient process and control for hydropower stations with a super long headrace tunnel from the perspective of multi-slice and multi-scale is proposed.

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“…It provides the effect of interaction between hydraulics system, the governor and the electric system. It helps in studying the stability problem associated with the system [5,6,7].…”

Section: Introductionmentioning

confidence: 99%

Simulation studies for refurbishment and uprating of hydro power plants

Rahi

Kumar

2014

2014 IEEE PES General Meeting | Conference &Amp; Exposition

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With the revolution in technology, material science and design techniques, the aged hydro power plants need refurbished and uprated so as to capture the rated capacity, availability and efficiency. Also, life can be enhanced at much lower cost and within short span of time than commissioning a new hydro facility. Before going for refurbishment and uprating of a plant a prefeasibility study is prerequisite so as to avoid wastage of time and investment. Hydro generator excitation system is a vital sub system in hydro power plants. In the present paper, simulation studies for excitation system of an aged small hydro power plant have been carried out with various options available for excitation design and their response under various conditions. The results of simulation studies may be used as guiding factors by power utilities during refurbishment and uprating while selecting a particular type of excitation.

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Analysis and Improvement of the Stability of a Hydro-Turbine Generating Unit With Long Penstock

Cited by 27 publications

References 9 publications

Modelling of hydraulic turbine for dynamic studies and performance analysis

Modelling of hydraulic turbine for dynamic studies and performance analysis

A Review of the Transient Process and Control for a Hydropower Station with a Super Long Headrace Tunnel

Simulation studies for refurbishment and uprating of hydro power plants

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