1. Power System Structure Basic DWP Power System

2. Power System Structure
Topics:
Supply structure
Water-current analogy
Power system flow chart

3. Power System Structure
Electrical supply structure
Tree roots – generation
Tree trunk- Transmission
Tree branch- Distribution
Tree leafs- customers (residential/commercial)

4. Power System Structure
Power Tree

5. Power System Structure
Water-current Analogy
Water in a pipe – current
Pressure applied – Voltage
Pipe wall thickness – Cable Insulation
Pipe diameter- conductor diameter

6. Power System Structure
Generation Station 18 KV
Transmission system 230 KV
Receiving stations (230KV-34.5KV)
Sub. Trans system 34.5 KV
Distribution stations (34.5 KV-4.8KV)
Distribution System (Feeders 4.8KV)
Pole top transformers (4.8KV-120/240V)
Customers (Residential/Commercial)

7. Power System Structure
Power system flow chart

8. Basic DWP Power System Generation Stations
1- Hydroelectric (Owen valley, PPI, PPII, Castaic)
2- Thermal (Harbor, Valley, Scattergood, Haynes)
3- Wind (Pine Tree)
4- Solar (Pine Tree)
5- Nuclear (Palo Verde)
6- Coal-fired (Navajo, intermountain)

9. Basic DWP Power System
Converter Stations
1- Sylmar
2- Adelanto

10. Basic DWP Power System Transmission Lines
Voltages starting at 115 KV to 1000 KV
1- Generation Tie Lines
2- Belt Lines
3- Radial feed Lines
4- Inter-utility Lines

11. Basic DWP Power System Switching Stations
Connecting Generation with Receiving stations
1- LA Basin (Sylmar, Olive, Gramercy, River)
2- Outside (Market place, Victorville)
Those to be used to rout electrical power as needed through the Transmission system, Switching Stations have no Power banks.

12. Basic DWP Power System Receiving Stations
Reduce the Transmission voltage to Sub-Transmission (138/230 KV to 34.5 KV)
Receiving Station are classified into five areas:
1-Metro (RS-A, RS-P , RS-F ,RS-G )
2-West LA (RS-D, RS-H, RS-N, RS-K, RS-L)
3-South (RS-B, RS-C, RS-Q)
4-East Valley (RS-E, RS-M, RS-S)
5-West Valley (RS-J, RS-T, RS-U, RS-Renaldi)

13. Basic DWP Power System Distribution Stations
Reduce the Sub-Transmission voltage to Feeders voltages (34.5 KV to 4.8 KV)
The city of LA have more than 120 distribution stations all over the great LA area
The customers fed by 34.5 KV lines are called IS customer station , the customers fed by 4.8 KV feeders are called CS customer station.

14. Basic DWP Power System Feeders
Feeders are lines and cables leave the distribution station with 4.8 KV to a load center and then splits into primaries .
Those primaries are the source of the pole top transformers that convert the 4.8 KV into 120/240 voltages feeding homes and commercial facilities .

15. Basic DWP Power System
Power Flow Chart

16. Basic DWP Power System System Block Diagram Practice Question:
Possible ways to feed DS-324