Discussion: “Field Testing and Adjusting of Hydraulic Turbine-Generator to Improve System Regulation” (Stone, H. M., 1961, ASME J. Eng. Power, 83, pp. 53–59)

This paper presents some of the results and methods of extensive hydro prime-mover governor tests conducted at the Big Creek Hydro System of the author’s company. Each governor response was improved by making co-ordinated governor adjustments. Frequency-response curves and dead band X-Y charts are included to show the improvement obtained. Frequency dead band and the governor transient response time were improved as much as 50 per cent. A good share of the credit for the results and improvements obtained is due to the use of adequate test equipment. As described elsewhere, the Mobile Dynamics Laboratory for Studying Generating Plant Controls and Governors was designed and used for extensive preliminary tests. Later, a small compact test rig, described in this paper, was assembled and used for the routine testing and adjusting of governors.

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In-Situ Testing of Operation Stability in Hydraulic Turbine Generator Unit

Earth & Space 2008 ◽

10.1061/40988(323)67 ◽

2008 ◽

Cited By ~ 1

Author(s):

Shanshan Wang ◽

Pizhong Qiao

Keyword(s):

Hydraulic Turbine ◽

In Situ Testing ◽

Turbine Generator ◽

Operation Stability ◽

Generator Unit

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Priority analysis for risk factors of equipment in a hydraulic turbine generator unit

Journal of Loss Prevention in the Process Industries ◽

10.1016/j.jlp.2019.01.002 ◽

2019 ◽

Vol 58 ◽

pp. 1-7 ◽

Cited By ~ 4

Author(s):

Beibei Xu ◽

Diyi Chen ◽

Huanhuan Li ◽

Keyun Zhuang ◽

Xiao Hu ◽

...

Keyword(s):

Risk Factors ◽

Hydraulic Turbine ◽

Turbine Generator ◽

Generator Unit

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Predictive Maintenance Using the Rotordynamic Model of a Hydraulic Turbine-Generator Rotor

Journal of Vibration and Acoustics ◽

10.1115/1.2893849 ◽

1998 ◽

Vol 120 (2) ◽

pp. 441-448 ◽

Cited By ~ 9

Author(s):

Bernhard P. Bettig ◽

Ray P. S. Han

Keyword(s):

Numerical Model ◽

Life Prediction ◽

Hydraulic Turbine ◽

Predictive Maintenance ◽

Maintenance Period ◽

Turbine Generator ◽

Generator Rotor ◽

Online Measurements ◽

Deterioration Mechanism ◽

Two Degree Of Freedom

A use of rotordynamic models in predictive maintenance is described in which variables characterizing the state of a deterioration mechanism are determined from online measurements. These variables are trended to determine the rate of deterioration and to perform a simulation to predict either the machine life or the maintenance period. Some useful terms for using models in predictive maintenance are defined and the prediction procedure is described. The procedure is demonstrated with a simple two degree-of-freedom example and the numerical model of an actual hydraulic turbine-generator rotor. Some benefits and problems associated with the implementation of the procedure are then discussed. It is considered that this procedure brings the possibility of a better understanding of deterioration processes and a resulting better life prediction.

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Design of additional mix robust governor control for hydraulic turbine generator

2008 Third International Conference on Electric Utility Deregulation and Restructuring and Power Technologies ◽

10.1109/drpt.2008.4523893 ◽

2008 ◽

Author(s):

Jian Chen ◽

Gui-shu Liang ◽

Qing Dong

Keyword(s):

Hydraulic Turbine ◽

Turbine Generator

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Rotor-Blade Coupled Vibration Analysis by Measuring Modal Parameters of Actual Rotor

Volume 6: Structures and Dynamics, Parts A and B ◽

10.1115/gt2009-59471 ◽

2009 ◽

Cited By ~ 3

Author(s):

Akira Okabe ◽

Takeshi Kudo ◽

Hideo Yoda ◽

Shigeo Sakurai ◽

Osami Matsushita ◽

...

Keyword(s):

Rotor Blade ◽

Synthesis Method ◽

Field Testing ◽

Turbine Rotor ◽

Modal Parameters ◽

Coupled Vibration ◽

Turbine Generator ◽

Modal Synthesis ◽

Unique Method ◽

Spring System

The designers of rotor shafts and blades for a traditional turbine-generator set typically employed their own models and process by neglecting the coupled torsional effect. The torsional coupled umbrella mode of recent longer blades systems designed for higher output and efficiency tends to have nearly doubled the frequency of electric disturbance (i.e., 100 or 120 Hz). In order to precisely estimate the rotor-blade coupled vibration of rotating shafts, the analysis must include a process to identify the parameters of a mathematical model by using a real model. In this paper we propose the use of a unique quasi-modal technique based on a concept similar to that of the modal synthesis method, but which represents a unique method to provide a visually reduced model. An equivalent mass-spring system is produced for uncoupled umbrella mode and modal parameters are measured in an actual turbine rotor system. These parameters are used to estimate the rotor-blade coupled torsional frequencies of a 700-MW turbine-generator set, with the accuracy of estimation being verified through field testing.

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