Power Plant Construction and QA/QC Section 4.3 – Electrical Interconnections Engineering Technology Division

2 Section 4.3 – Electrical Interconnections Overview Interconnections provide; Power Distribution – Substations, Grid Protection – Overvoltage, Overcurrent Transformation – Voltage Plant base loads– voltage and frequency Protection – Relays Equipment availability

3 Section 4.3 – Electrical Interconnections Interconnected Generation Cogeneration Small Power Production – Solar, Waste, Biomass Peak Shaving Dispersed Storage and Generation – Pump Storage Federal Energy Regulatory Commission (FERC) FERC 1979 Energy Act

4 Section 4.3 – Electrical Interconnections Transformer Connections PS PS PSPS Wye – Delta Delta – DeltaDelta – Wye Wye – Wye

5 Section 4.3 – Electrical Interconnections Transformer Protection Protective Relays; Voltage – over and under Frequency – over and under Differential – internal faults Directional – power flow Distance – fault distance from source Synchronizing – allow synchronization of two sources

6 Questions? Section 4.3 – Electrical Interconnections