Power Plant Construction and QA/QC

Section 5.3 – Turbine and Engine Governors

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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.

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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

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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.

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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.

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Section 5.3 – Turbine and Engine Governors

Simple Governor

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Questions?

Section 5.3 – Turbine and Engine Governors