1. Physics and the Electric power industry

2. Randy Bermke Welcome Electrical Maintenance Manager
Alliant Energy – Edgewater generating station
B.S.E.E. from UW-Platteville
Registered Professional Engineer with the State of Wisconsin
Member of the Institute of Electrical and Electronic Engineers (IEEE)
20 + years experience in the power generation field

3. Overview Types of power generating technologies Wind power overview
Steam cycle power plant overview (Coal)
Power transmission overview (Generating plant to your house)
Cost of energy usage. * (Hint: May need this in the near future)
Questions
Basic electrical theory
Career fields at Alliant Energy
Please feel free to ask questions.

4. Types of power generating plants.
Steam turbine – Generator (Steam supplied via a boiler)
Coal fired
Nuclear powered
Natural gas fired
Oil fired
Combustion Turbine – Generator
Renewable power
Hydroelectric dams
Wind turbines
Solar
Geothermal
Biofuels (switchgrass, wood byproducts, etc.)

5. Renewable Energy– Wind power
One of the fastest growing and most visible forms of renewable energy today.
Varity of capacity ranges – Typical utility size 1 to 3 Megawatts each unit
“Fuel” is emission free
Major parts of a wind farm
Wind Turbine
Tower
Nacelle – Housing at the top of the tower
Generator
Gear box – connects blade assembly to the generator
Auxiliary systems – lube oil, control system, etc.
Blade assembly – Blades, Hub, Blade actuators.
Underground distribution system – Connects the wind turbines to the substation.
Substation – Connects underground distribution to the transmission grid

6. Renewable Energy– Wind power
Alliant Energy’s Wisconsin wind facility
Cedar Ridge wind farm
South of Fond Du Lac – Town of Eden
41 Vestas wind turbines
1.65 MW per turbine
Total site capacity of 68 MW
Turbines are spread over a 12.2 square mile area

7. Renewable Energy– Wind power
Example of wind power generation at Cedar Ridge

8. Edgewater Generating Station (Coal)
The Edgewater generating station is a coal fired power plant with 3 units.
Units #1 and #2 have been retired and removed.
Unit #3 is a 1950’s vintage unit with an output rating of approximately 60 Megawatts.
Unit #4 is a late 1960’s vintage unit with an output rating of approximately 340 Megawatts.
Unit #5 is a mid 1980’s vintage unit with an output rating of approximately 400 Megawatts.

9. Simplified steam cycle power plant
Facilitator: Walk them through the diagram.
Example:
Fuel is burned in a boiler to turn water into steam. Under high pressure, the steam turns the blades of a turbine that spins a generator, producing electricity.

10. The First law of thermodynamics:
The power production cycle is governed by 2 very important laws of physics. Both are based upon the laws of conservation of mass and conservation of energy.
The First law of thermodynamics:
This basically states that energy can be changed from one form to another but it is neither created or destroyed. The total amount of energy is a constant.
Facilitator: Walk them through the diagram.
Example:
Fuel is burned in a boiler to turn water into steam. Under high pressure, the steam turns the blades of a turbine that spins a generator, producing electricity.

11. The Second law of Thermodynamics:
This law effectively says that a system operating in a cycle (like below) cannot completely convert all of the heat energy into work (Electrical power). Example the heat rejected to the condenser.
Facilitator: Walk them through the diagram.
Example:
Fuel is burned in a boiler to turn water into steam. Under high pressure, the steam turns the blades of a turbine that spins a generator, producing electricity.

12. Edgewater Generating Station Fuel
Example coal analysis (By weight) for Edgewater Unit #5
Carbon %
Hydrogen (H2) 4.6 %
Nitrogen (N2) %
Sulfur (S) %
Ash %
Oxygen (O2) 7.8%
Moisture %
Total: 100%
The heating valve of the coal is approximately 8400 Btu/Lb.
A BTU is the amount of heat required to raise one pound of water one degree Fahrenheit at one atmosphere of pressure.
At full load (400 MW) Edgewater #5 will use about 230 Tons of coal per hour!
Edge 5 at full load 230 tons per hour

13. The simplest type of generator has two main components: a rotating magnet called the "rotor," which turns inside stationary coils of copper wire called the "stator." When the rotor rotates through the magnetic field, it generates a flow of current through the copper coils of the stator.
Generating plants must use some form of energy or fuel to turn the rotor. Most electricity is produced by burning fossil fuels—coal, natural gas, and, to a much lesser extent, fuel oil.

14. Facilitator: Describe photo

15. Facilitator: Describe photo

16. Facilitator: Describe photo
Generator

17. Delivering the energy
Electricity is produced at a generating station (as previously shown).
As it leaves the generator it’s voltage is increased. This voltage is anywhere from 69,000 volts to 765,000 volts depending on the transmission system.
From there it is sent over high voltage transmission lines.
From the transformers, electricity enters the transmission system.
Transmission lines, which consist of heavy cables strung between tall towers, carry electricity to the point where it is needed.
Electricity travels at nearly the speed of light, arriving at a destination at almost the same moment it is produced.

18. Delivering the energy continued…
At the end of the transmission lines, the high voltage electricity is lowered at a substation to distribution voltages (Example: 7,200 to 12,500 volts).
The electricity then “flows” at the distribution voltage to a power pole by the customers home. There it is lowered one more time to a usable voltage, typically 120 / 240 volt for homes.
From the transformers, electricity enters the transmission system.
Transmission lines, which consist of heavy cables strung between tall towers, carry electricity to the point where it is needed.
Electricity travels at nearly the speed of light, arriving at a destination at almost the same moment it is produced.

19. Facilitator: Summarize by walking them through the diagram.

20. Electrical “Energy” is a rate of electrical usage (Watts) multiplied by a period of time (Hours).
Customers are billed based upon their energy usage.
This is typically measured in Killowatt-hours.

21. Measuring electricity in kilowatt hours
Kilowatt-hours (Wh ÷ 1000 = kWh)
1,000 watt-hours is a kilowatt-hour (kWh).
Convert 300,000 watt-hours to kWh.
Answer: 300,000 / 1,000 = 300 kWh
If the utility charges 11 cents per kWh, what is the cost of 300kWhs of electricity?
Answer: 300 x 0.11 = $33

22. Electric usage “story problem”
It was very hot in July and you ran your air-conditioner 8 hours everyday of the month (31 days) Your air-conditioner was 3500 watts and your utility charges 11 cents per kWh. How much did it cost you in July to run your air-conditioner?
Remember:
Watts / 1000 = kW and
kW x Time x electric rate ($.11) = $’s
3.5 x 8 hours = 28 kWh per day
28 kWh x 31 days = 868 kWh
868 kWh x $.11 = $95.48 total
Facilitator: stop here for plant tour
3.5 kW * 8 Hours * 31 days * 0.11 per kWhr = ?
$95.48

23. Questions ?

24. Common Electrical Terms
Volt (E or V) - The unit of electromotive force, electrical pressure, or difference of potential
Volts = Watts ÷ Amps V = W ÷ I
Ampere (I) - The basic unit measuring the quantity of electricity or unit of current flow
Amps = Watts ÷ Volts I = W ÷ V
Watt (P or W) - The unit of electrical power. Watts is a product of amps x volts
Watts = Volts x Amps P = E x I
Ohm (“Omega” Ω or R) – The measure of resistance in an electrical circuit.

25. Ohm's law pi chart
P = Power in Watts
E = Voltage in Volts
I = Current in Amps
R = Resistance in Ohms

26. Why do we use high voltage for long distance transmission lines?
Example:
We want to provide 1 megawatt (1 million watts) of power from Sheboygan to Fond du lac (distance of 45 miles). The transmission line has a resistance of .168 ohms per mile of conductor.
So:
P (Power) = 1,000,000 watts
D (Distance) = 45 Miles
R (conductor) = .168 Ohm’s per mile
R (transmission line) = D X R = 45 miles X .168 Ohm’s per mile = 7.56 Ohm’s

27. Why do we use high voltage for long distance transmission lines?
Option #1:
Assume V = 22,000 volts (This is the voltage Edgewater #5 generates at)
Using Ohm’s law:
I = Power (Watts) / Voltage (Volts) = 1,000,000 watts / 22,000 Volts = Amps
From this we can calculate the power “lost” in the transmission line.
Power = I^2 * R = (45.45)^2 * 7.56 Ohms = 15,616 watts
Which is approximately 1.5 % of the total 1 Megawatt load.
Option #2:
Assume V = 345,000 volts
I = Power (Watts) / Voltage (Volts) = 1,000,000 watts / 345,000 Volts = 2.9 Amps
Power = I^2 * R = (2.9)^2 * 7.56 Ohms = 63 watts
Which is approximately .006 % of the total 1 Megawatt load.

28. Why do we use high voltage for long distance transmission lines?
Answer:
To minimize the amount of transmission line losses.

29. Question:
What is the large white “plume” that exits the stacks?
Remember the coal analysis:
Carbon %
Hydrogen (H2) 4.6 %
Nitrogen (N2) %
Sulfur (S) %
Ash %
Oxygen (O2) 7.8%
Moisture %
Total: 100%
Answer:
Moisture !!!
Our coal contains almost 25 % moisture by weight.
As the moisture in the flue gas cools as it leaves the stack, it condenses into a visible plume.
This is the same as seeing your breath on a cold winter day!
Edge 5 at full load 230 tons per hour

30. Let’s take a look at a 400 MW steam turbine – generator.
If you wanted to use a diesel engine to replace the steam turbine, how big of an engine would you need (Horsepower)?
400 MW’s = 400,000 Kilowatts = 400,000,000 watts
1 Horsepower = 746 watts
400,000,000 watts / (746 watts / HP) = 536,193 HP

31. Questions ?

32. Where are Alliant Energy’s Customers?
Who is Alliant Energy?
Serve over 1 million electric and over 500,000 natural gas customers
Headquartered in Madison, WI with Corporate Offices in
Cedar Rapids and Dubuque, IA
- Nearly 5,000 employees
15 power plants
Where are Alliant Energy’s Customers?
Iowa
Wisconsin
Southern Minnesota

33. Getting started Education Requirements: Job Skills:
Many positions require the minimum of a high school diploma or GED, and a clean driving record
Some highly specialized areas require training at a community college, while others like engineers require a 4-year degree
Job Skills:
Course work in math, science, and technology
A curiosity about how things work and how to solve problems
The ability to safely operate equipment and use safety gear
A cooperative attitude
Strong listening skills and the ability to understand and meet customer needs
Other important items:
A positive safety attitude. Our actions not only affect our own safety but the safety of our fellow employees and the public.
Initial drug and alcohol testing as well as random testing during employment.

34. What are the most common plant jobs?
Maintenance Technician and Equipment Operator
If you enjoy working with your hands, have good hand-eye coordination, like solving problems, and are comfortable using math, these jobs may interest you.
High school courses in electronics, algebra, trigonometry, and physics
Community college coursework in electro-mechanical technology/welding
Related work experience
Talk to your guidance counselor
Paid apprenticeship
Starting hourly wage of $26
Advancement opportunities

35. What does an engineer do?
An engineer uses scientific and mathematical knowledge to solve problems.  There are many types of engineers, and all require a four-year degree.  You must select the type of engineering you want to go into when you enter college.
Mechanical Engineer
Electrical Engineer
Civil Engineer
Chemical Engineer
Starting salary of $55,000
Advancement opportunities

36. Other Careers at Alliant Energy
Information Technology
Accounting
Finance
Communication
Environment
Safety
Supply Chain

37. Get into energy & be part of a high-tech, high-growth industry!
Check out the Get Into Energy website, where you can find career profiles, watch videos, take skills tests, and learn more about careers in the energy field.
Get Into Energy!

38. Any Questions????