WCRDE

It is designed for the calculation of transient processes at PSPP and high-pressure HPP with branched pressure systems, surge tanks and units with Francis turbines and pump-turbines. With the help of the program, it is possible to calculate pressure systems of PSPPs and HPPs of almost any configuration. The computer model includes an automatic control system and pressure relief valves.

Capabilities:

• Fracis turbines and pump-turbines;
• Turbine and pump operation;
• Pressure relief valve on each turbine;
• Main and tailwater conduits;
• Up to 10 penstocks;
• Upstream and downstream surge tanks;
• Regulation according to the law of changing the opening of the wicket gate or the turbine governor;
• Transient processes:
  • put in operation;
  • load changing;
  • discharge changing;
  • pull up the unit;
  • load rejection;
  • impute failure;
  • frequency control in isolated power system.

Example of calculation results

Load rejection 2×70 MW with transition to pump turbine idling. Pressure and piezometric line along the penstock’s track

Load changing 2×70 MW from pump turbine idling. Pressure and piezometric line along the penstock’s track

Frquency control in isolated power system. Dumping 10 MW of consumer load from 60 MW to 50 MW. Pressure and piezometric line along the penstock’s track

Impute failure. Q=2×22.6 m3/s. Pressure and piezometric line along the penstock’s track