Power Plant Construction and QA/QC

Section 7.4 – Hydroelectric Generators, Transformers and Controls

Engineering Technology Engineering Technology DivisionDivision

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Overview

Section 7.4 – Hydroelectric Generators, Transformers and Controls

• Many Changes

• Electrical Code

• Material Improvements

• Equipment Updates – Oil Filled

• Base Load Power Generation

• Salient Pole Generator – Extended Field Poles

• Due to Slow Speed

• Maintain Frequency

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Generator Ratings

Section 7.4 – Hydroelectric Generators, Transformers and Controls

• Speed 300 to 1200 RPM• Frequency 60 Hz (cps)• Rotor Diameter 2 to 62 ft• Generator Rating 50 kVA to 900 mVA• Power Factor 0.8 to 1.0 (0.95 normal)• Power Capacity 50 to 1000 MW• Efficiency 97.5% to 98.8%• Output Voltage 18 kV• Transformer Output 500 kV

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Generator Types - Standard

Section 7.4 – Hydroelectric Generators, Transformers and Controls

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Generator Types - Umbrella

Section 7.4 – Hydroelectric Generators, Transformers and Controls

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Generator Types – Semi Umbrella

Section 7.4 – Hydroelectric Generators, Transformers and Controls

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Section 7.4 – Hydroelectric Generators, Transformers and Controls

Generator Components

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Voltages

Section 7.4 – Hydroelectric Generators, Transformers and Controls

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Transformers

Section 7.4 – Hydroelectric Generators, Transformers and Controls

Hoover Dam Switchyard

Chief Joseph Dam Generator Output Transformers

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Generator Circuit Breakers

Section 7.4 – Hydroelectric Generators, Transformers and Controls

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Battery Room

Section 7.4 – Hydroelectric Generators, Transformers and Controls

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Questions?

Section 7.4 – Hydroelectric Generators, Transformers and Controls