Thesis (M.S.)--University of Wisconsin--Madison. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 100-102).

Thesis (M.S.)--University of Wisconsin--Madison, 1962. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes Bibliographical references (leaves 106-107).

Thesis (M.S.)--University of Wisconsin--Madison, 1961. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes Bibliographical references (leaves 45-47).

Promotionsarbeir--Eidgenossische Technische Hochschule, Zürich.

Thesis (Ph. D.)--University of Wisconsin--Madison, 1981. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 152-155).

Thesis (M.S.)--University of Wisconsin--Madison, 1962. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaf [73]).

Thesis (M.S.)--University of Wisconsin--Madison, 1963. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 50-51).

This thesis examines the influence of different gate operation curves on the surplus or deficiency of energy input to a hydraulic turbine accompanying a sudden change of load on the turbine. A general solution to the problem is obtained by evaluating the energy input to the penstock and the energy conversion within the penstock during transient conditions. The results show that for given maximum pressure rise or drop, a considerable reduction in the surplus or deficiency of energy input to the turbine can be obtained by use of a suitable gate operation curve. At the same time it is possible to reduce the hydraulic oscillations in the system. / Applied Science, Faculty of / Civil Engineering, Department of / Graduate

The thesis deals with a procedure for developing mathematical models of hydraulic components for hydroelectric power generating units. Hydraulic system components modelled are the penstock, reservoir, surge tank, Francis turbine and the wicket gate actuator. A modelling philosophy is suggested. The thesis proposes that for a generator experiencing a sharp transient, such as line breaker reclosing, its capacity to maintain synchronism can be enhanced by taking advantage of waterhammer to sharply reduce the turbine's hydraulic torque input to the generator during the first few swings of the tie-line. Results of computer simulations included support this claim. / Applied Science, Faculty of / Electrical and Computer Engineering, Department of / Graduate

A linearized mathematical model for the analysis of turbine speed governing problem is presented. This model includes the elasticity effects of both water and penstock walls, the effects of turbine characteristic slopes, and the linearized equation of a proportional-integral hydraulic governor. The procedure can be extended to a governor with a derivative term as well. Exact, travelling-wave solutions for the different possible cases are derived and presented in simple forms. Taylor's expansion formulas which offer a more efficient alternative for numerical evaluation of the speed are also derived. Solutions in both cases take into consideration penstock friction losses in a linearized form, as well as permanent speed droop (or speed regulation) and self-regulation coefficient. These travelling-wave solutions are then compared to numerical solution by the method of characteristics with close agreement in the results. This new analytical method is then used to study the influence of elasticity on maximum speed deviation and on the stability of oscillations and to define the limitation of a rigid-column analysis. For high-head plants, elasticity of the water and penstock walls increases maximum speed if governor settings are kept the same. The major influence of the elastic waves, however, is the reduction of the stability margin for the speed variation. Optimum governor settings will be, therefore, different from those obtained by neglecting elasticity of the water and penstock walls. / Applied Science, Faculty of / Civil Engineering, Department of / Unknown