EEE 360 MIDTERM 2 COMPREHENSIVE SCRIPT
WITH SOLUTIONS
◉ extra high voltage line.
Answer: transformers increase generator voltage to 500kV and
supply EHV which carries energy to a substation far away. They
interconnect the power plant with substations in load centers. The
max length is 400-500 miles. EHV substations reduce voltage to high
voltage.
◉ high voltage line.
Answer: high voltage lines interconnect substations in different load
centers. high voltage lines are (115kv to 230kv) and max length is
100-200 miles.
◉ system voltage.
Answer: described by a RMS value of line to line voltage
◉ sub transmission lines.
Answer: interconnect substations within a town or a city. (15kv-
34.5kv) max length 20-80 miles.
◉ transformer.
, Answer: changes the voltage and current
◉ switchgear.
Answer: protects system
◉ circuit breaker.
Answer: switches off (open line) in the event of a fault
◉ distribution lines.
Answer: directly supply the loads (customers) length of 5-30 miles
and voltages below 46kV
◉ transmission system.
Answer: transfers 3 phase power from electric generating stations to
load centers
◉ loop network.
Answer: where at least 2 lines supply each load and generating
stations are connected to network with 3 or even 4 lines.
◉ overhead transmission line.
Answer: power lines in open areas along a road in a city. Overhead is
6-10x cheaper than underground.
WITH SOLUTIONS
◉ extra high voltage line.
Answer: transformers increase generator voltage to 500kV and
supply EHV which carries energy to a substation far away. They
interconnect the power plant with substations in load centers. The
max length is 400-500 miles. EHV substations reduce voltage to high
voltage.
◉ high voltage line.
Answer: high voltage lines interconnect substations in different load
centers. high voltage lines are (115kv to 230kv) and max length is
100-200 miles.
◉ system voltage.
Answer: described by a RMS value of line to line voltage
◉ sub transmission lines.
Answer: interconnect substations within a town or a city. (15kv-
34.5kv) max length 20-80 miles.
◉ transformer.
, Answer: changes the voltage and current
◉ switchgear.
Answer: protects system
◉ circuit breaker.
Answer: switches off (open line) in the event of a fault
◉ distribution lines.
Answer: directly supply the loads (customers) length of 5-30 miles
and voltages below 46kV
◉ transmission system.
Answer: transfers 3 phase power from electric generating stations to
load centers
◉ loop network.
Answer: where at least 2 lines supply each load and generating
stations are connected to network with 3 or even 4 lines.
◉ overhead transmission line.
Answer: power lines in open areas along a road in a city. Overhead is
6-10x cheaper than underground.
