Power Plant Construction and QA/QC Section 7.4 – Hydroelectric Generators, Transformers and Controls Engineering Technology Division

2 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

3 Generator Ratings Section 7.4 – Hydroelectric Generators, Transformers and Controls Speed 300 to 1200 RPM Frequency60 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

4 Generator Types - Standard Section 7.4 – Hydroelectric Generators, Transformers and Controls

5 Generator Types - Umbrella Section 7.4 – Hydroelectric Generators, Transformers and Controls

6 Generator Types – Semi Umbrella Section 7.4 – Hydroelectric Generators, Transformers and Controls

7 Generator Components

8 Voltages Section 7.4 – Hydroelectric Generators, Transformers and Controls

9 Transformers Section 7.4 – Hydroelectric Generators, Transformers and Controls Hoover Dam Switchyard Chief Joseph Dam Generator Output Transformers

10 Generator Circuit Breakers Section 7.4 – Hydroelectric Generators, Transformers and Controls

11 Battery Room Section 7.4 – Hydroelectric Generators, Transformers and Controls

12 Questions? Section 7.4 – Hydroelectric Generators, Transformers and Controls