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Time-domain modeling and a case study on regulation and operation of hydropower plants

Time-domain modeling and a case study on regulation and operation of hydropower plants

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In this chapter, the main scope lies in the time-domain analysis of regulation and operation of HPPs. The primary goal is to briefly present the methods and procedures of the analysis. First, a numerical model in the software TOPSYS, developed for scientific studies and consultant analyses of the transient processes of HPPs, is briefly presented. Second, information of a practical engineering case, i.e., areal Chinese HPP with a surge tank and Francis turbines, is introduced. In the third place, a case study of various dynamic processes is conduced based on a real consultant project of the Chinese HPP; key requirements and main influencing factors of the diverse conditions of regulation and operation are analyzed.

Chapter Contents:

  • Nomenclature
  • 2.1 Introduction
  • 2.2 Numerical model of hydropower plants
  • 2.2.1 Piping system
  • 2.2.1.1 Upstream reservoir with constant water level
  • 2.2.1.2 Downstream reservoir with constant water level
  • 2.2.1.3 Series junction
  • 2.2.1.4 Branch junction (pipeline junction)
  • 2.2.1.5 Surge tank
  • 2.2.2 Hydropower unit with Francis turbine
  • 2.2.2.1 Turbine and generator
  • 2.2.2.2 Governor system
  • 2.2.3 Features of the model
  • 2.3 Practical engineering case
  • 2.4 Case study of various dynamic processes of hydropower plant
  • 2.4.1 Start-up and no-load operation
  • 2.4.2 Grid-connected operation
  • 2.4.2.1 Primary frequency control
  • 2.4.2.2 Automatic generation control (secondary frequency control)
  • 2.4.3 Isolated operation
  • 2.4.4 Emergency stop and load rejection
  • 2.5 Conclusions
  • Acknowledgments
  • References

Inspec keywords: hydraulic turbines; time-domain analysis; hydroelectric power stations

Other keywords: transient process; TOPSYS software; hydropower plant operation; consultant analysis; surge tank; areal Chinese HPP; Francis turbines; hydropower plant regulation; time-domain analysis; time-domain modeling; numerical model

Subjects: Mathematical analysis; Hydroelectric power stations and plants

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