Pressure-Time Method Using Modern Practices

by J. -M. Lévesque, Hydro-Quebec, Montreal, Canada,
J. Néron, Hydro-Quebec, Montreal, Canada,
C. Tran, Hydro-Quebec, Montreal, Canada,

Document Type: Proceeding Paper

Part of: Waterpower '91: A New View of Hydro Resources

Abstract: Over the past twenty years, Hydro-Quebec has modernized the pressure-time method of flow measurement, a method which is generally economical but sometimes difficult to apply. Starting in the 1970s, calculations were computerized and measurement with electronic transducers was introduced. Since then, improvements in measurement have included hydropneumatic filters, short-time constant pressure transducers and data acquisition. Furthermore, analytical tools were developed in automatic processing of the pressure-time diagram so that the final flows can be calculated rapidly, with an accuracy often better than 0.5%. These flows are integrated with other measured parameters to provide in-situ computer-generated results. Specific results of tests in five power stations are reported with recommendations for success and justification of the tools developed.

Subject Headings: Flow measurement | Pressure measurement | Pressurized flow | Power plants | Computing in civil engineering | Filters | Hydro power | Economic factors

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