Combined Excitation/Governor system delivered for a 3.3MVA hydro unit in Canada, replacing a Woodward Gate Shaft mechanical governor and an AVR with obsolete components
The project scope included:
- One (1) cabinet for excitation and governor control including some unit automation functions
- Electrical-hydraulic interface for the existing wicket gate distribution valve
- Speed sensing system
By eliminating hardware associated with a separate governor controller and a separate excitation controller, a combined controller is able to achieve a higher Mean Time Between Failure (MTBF), hence increasing the overall reliability of the generating unit.