Power Plant Construction and QA/QC Section 5.3 – Turbine and Engine Governors Engineering Technology Division

2 Section 5.3 – Turbine and Engine Governors Overview Equipment Control is needed for steady state output and equipment protection. Governors limit equipment speed and load. Governors work in harmony in a dynamic control system. High speed equipment requires over speed protection.

3 Section 5.3 – Turbine and Engine Governors Controlled System Prime Movers convert energy to work. Governors match the load to the energy input. Governors must react for transients

4 Section 5.3 – Turbine and Engine Governors Dynamic Response and Speed System response is only as fast as its slowest component. Response rate prevents overspeed or bog down. Feedback is used to prevent overspeed and bog down. For electric generation, speed is the key feedback parameter. Steam, water or fuel flow is adjusted to maintain speed.

5 Section 5.3 – Turbine and Engine Governors Dynamic Response and Transients System response is only as fast as its slowest component. Response rate prevents overspeed or bog down. Feedback is used to prevent overspeed and bog down. For electric generation, speed is the key feedback parameter. Steam, water or fuel flow is adjusted to maintain speed.

6 Section 5.3 – Turbine and Engine Governors Simple Governor

7 Questions? Section 5.3 – Turbine and Engine Governors