Download Earth’s Changing Environment Lecture 1

yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Document related concepts

Electrification wikipedia, lookup

Mains electricity wikipedia, lookup

History of electric power transmission wikipedia, lookup

Power engineering wikipedia, lookup

Switched-mode power supply wikipedia, lookup

Alternating current wikipedia, lookup

Voltage optimisation wikipedia, lookup

Power electronics wikipedia, lookup

Distribution management system wikipedia, lookup

Islanding wikipedia, lookup

Power inverter wikipedia, lookup

Electrical substation wikipedia, lookup

Three-phase electric power wikipedia, lookup

Rectiverter wikipedia, lookup

Power over Ethernet wikipedia, lookup

Electric power system wikipedia, lookup

Utility frequency wikipedia, lookup

Solar micro-inverter wikipedia, lookup

Rechargeable battery wikipedia, lookup

Electric battery wikipedia, lookup

Wireless power transfer wikipedia, lookup

Electric power transmission wikipedia, lookup

Life-cycle greenhouse-gas emissions of energy sources wikipedia, lookup

Vehicle-to-grid wikipedia, lookup

Grid energy storage wikipedia, lookup

Earth’s Changing Environment
Lecture 16
On and Off the Electric Grid
Electric Power Grid
On the Grid - AC Power
Electric Power Plants produce AC –
Alternating Current.
Batteries produce DC – Direct Current
Transformers step up
the generator voltage
from 1 kV range to
100 kV range
Power Substation
Transformers step down to kV range for
neighborhood distribution
House Power
Transformers on
power poles drop
the voltage down to
240 VAC for home
Watt-Hour Meter
Watt-hour meter
measures and records
energy use.
Most house
appliances use AC.
Some household
devices use 240 v
and some use 120 v.
Off the Grid - Distributed Power
Some distributed or off-grid
systems use generators that
produce DC power.
High voltages AC is not
needed because of short
transmission distance
Inverters can generate AC for
AC loads.
Storage or Back-up
Off-Grid Power Systems need
back-up or storage.
Back-up can be gasolinepowered generators or other
forms of energy.
Storage can be battery,
thermal, or mechanical
Battery Storage
Batteries are usually 6.0 volt or
12 volt DC.
Battery storage capacity
expressed in Amp-Hour
A 100 Amp-Hour battery could
deliver 5 Amps for 20 hours.