EE14 MIDTERM REVIEWER
問題一覧
1
essentially employs a prime mover coupled to an alternator for production of electric power
Generating Station
2
the connecting links between the generating station and the distribution system and lead to other power system over interconnection.
Transmission System
3
it connects all the individual loads in a given locality to the transmission
Distribution System
4
It is the opposition of line conductors to current flow. Distributed uniformly along the whole length of the line as shown in the figure
Resistance
5
When an alternating current flows through a conductor, a changing flux is set up which links the conductor. Due to these flux linkages.
Inductance
6
We know that any two conductors separated by an insulating material constitute a capacitor. As any two conductors of an overhead transmission lines are separated by air which act as an insulation.
Capacitance
7
When the length of an overhead transmission line is up to about to 50km and the line voltage is comparatively low (<20 kV)
Short Transmission Line
8
When the length of of an overhead transmission line is about 50-150km and the line voltage is moderately high (>20kV<100 kV)
Medium Transmission Line
9
When the length of an overhead transmission line is more than 150 km and line voltage is very high (>100kV)
Long Transmission Line
10
When a transmission line is carrying current there is a voltage drop in the line due to the resistance and inductance of the line
Voltage Regulation
11
The power obtained at the receiving end of a transmission line is generally less than the sending end power due to losses in the line resistance.
Transmission Efficiency
12
is the plot variation of load demand with respect to time
Load Curve
13
__________ defined as the maximum load occuring in the time under consideration.
Peak and Maximum Demand
14
is define as the ratio of average load during a period to maximum load during the same period
Load Factor
15
applies to a group of loads whose individual maximum demand do not all ocur at the same time
Diversity Factor
16
The difference between the maximum demand and the effective plant rating is known as _________
Generating Plant Margin
17
Largest and the most Complex man made system
Power System
18
The number 1 goal is to design a power system which will not present any electrical hazard to the people who utilize the facility and/or the utilization equipment fed from the electrical system.
Safety
19
as well as local electrical codes provide a minimum standards and requirements in the area of wiring design and protection.
NEC- NATIONAL ELECTRICAL CODE
20
The owners overall budget for first cost purchase and installation of the electrical distribution system and electrical utilization equipment will be a key factor in determining which of various alternate system designs are to be selected
Minimum Initial Investment
21
The degree of service ______ and _______ needed will vary depending on the type and use of the facility as well as the loads or processes being supplied by the electrical distribution system
Maximum Service Continuity, Continuity and Reliability
22
In industrial manufacturing plants, electrical utilization loads are periodically relocated or changed requiring changes in the electrical distribution system
Maximum Flexibility and Expandability
23
Electrical Efficiency can generally be _______ by designing systems that minimize the losses in conductors, transformers and utilization equipment. Proper Voltage level
Maximum Electrical Efficiency, Maximized
24
Usually the simpler the electrical system design and the simpler the electrical equipment , the less the associated maintenance cost and operators errors
Maximum Maintenance Cost
25
The power input requirements of all utilization equipment has to be considered including the acceptable operating range or the equipment and the electrical distribution system has to be designed to meet these needs
Maximum Power Quality
26
simply the conversion of energy from one form to another
Generation
27
The machine used in fossil generation are highspeed but ________
Slow Starting
28
the main issues are environmental as burning of fuel causes pollution therefore__________ used
Low Sulphur Content Fuel
29
Are slow machines but they are quick starting and have a good ramping rate
Hydral Machines
30
In nuclear plants, the basic cycle is similar to that of fossil plant but the required heat is provided by the ________rather from burning fuels
nuclear reaction
31
The transmission line maybe _____ or _____depending upon the application
AC or DC
32
The Overhead AC lines are applied on power system at voltages in the range of
115KV TO 800KV
33
either solid round, stranded or bundled stranding provides flexibility
Conductors
34
acts as a shield to protect the energized conductors from lightning strokes
Groundwires
35
Suspend the energized phase conductors and insulate them from ground tower
Insulators
36
DC lines are sometimes called _________since they can be used to interconnect two systems operating at different frequencies
Asynchronous Ties
37
In this mode of transmission the _________ voltages and currents are converted to DC line and are converted back to AC at the other end
3 phase, 60hz
38
are used in very densely populated area but they are rarely used because they are more expensive as they are require insulating materials instead of air to separate the conductors from each other and from ground.
Underground Cables
39
the utilization of electric power is collectively called
loads
40
There are also some technical disadvantages associated with underground Cables. One major problem is the___________in the underground cables
very high capacitance inherent
41
The capacitance gives rise to ___________special equipment must be installed to compensate for the effect of charging currents which adds to the cost
charging current
42
Power Monitoring communication systems connected to _____________ can provide the trending and historical data necessary for future capacity growth.
Electronic Metering
EE14 MIDTERM REVIEWER
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13問 • 1年前問題一覧
1
essentially employs a prime mover coupled to an alternator for production of electric power
Generating Station
2
the connecting links between the generating station and the distribution system and lead to other power system over interconnection.
Transmission System
3
it connects all the individual loads in a given locality to the transmission
Distribution System
4
It is the opposition of line conductors to current flow. Distributed uniformly along the whole length of the line as shown in the figure
Resistance
5
When an alternating current flows through a conductor, a changing flux is set up which links the conductor. Due to these flux linkages.
Inductance
6
We know that any two conductors separated by an insulating material constitute a capacitor. As any two conductors of an overhead transmission lines are separated by air which act as an insulation.
Capacitance
7
When the length of an overhead transmission line is up to about to 50km and the line voltage is comparatively low (<20 kV)
Short Transmission Line
8
When the length of of an overhead transmission line is about 50-150km and the line voltage is moderately high (>20kV<100 kV)
Medium Transmission Line
9
When the length of an overhead transmission line is more than 150 km and line voltage is very high (>100kV)
Long Transmission Line
10
When a transmission line is carrying current there is a voltage drop in the line due to the resistance and inductance of the line
Voltage Regulation
11
The power obtained at the receiving end of a transmission line is generally less than the sending end power due to losses in the line resistance.
Transmission Efficiency
12
is the plot variation of load demand with respect to time
Load Curve
13
__________ defined as the maximum load occuring in the time under consideration.
Peak and Maximum Demand
14
is define as the ratio of average load during a period to maximum load during the same period
Load Factor
15
applies to a group of loads whose individual maximum demand do not all ocur at the same time
Diversity Factor
16
The difference between the maximum demand and the effective plant rating is known as _________
Generating Plant Margin
17
Largest and the most Complex man made system
Power System
18
The number 1 goal is to design a power system which will not present any electrical hazard to the people who utilize the facility and/or the utilization equipment fed from the electrical system.
Safety
19
as well as local electrical codes provide a minimum standards and requirements in the area of wiring design and protection.
NEC- NATIONAL ELECTRICAL CODE
20
The owners overall budget for first cost purchase and installation of the electrical distribution system and electrical utilization equipment will be a key factor in determining which of various alternate system designs are to be selected
Minimum Initial Investment
21
The degree of service ______ and _______ needed will vary depending on the type and use of the facility as well as the loads or processes being supplied by the electrical distribution system
Maximum Service Continuity, Continuity and Reliability
22
In industrial manufacturing plants, electrical utilization loads are periodically relocated or changed requiring changes in the electrical distribution system
Maximum Flexibility and Expandability
23
Electrical Efficiency can generally be _______ by designing systems that minimize the losses in conductors, transformers and utilization equipment. Proper Voltage level
Maximum Electrical Efficiency, Maximized
24
Usually the simpler the electrical system design and the simpler the electrical equipment , the less the associated maintenance cost and operators errors
Maximum Maintenance Cost
25
The power input requirements of all utilization equipment has to be considered including the acceptable operating range or the equipment and the electrical distribution system has to be designed to meet these needs
Maximum Power Quality
26
simply the conversion of energy from one form to another
Generation
27
The machine used in fossil generation are highspeed but ________
Slow Starting
28
the main issues are environmental as burning of fuel causes pollution therefore__________ used
Low Sulphur Content Fuel
29
Are slow machines but they are quick starting and have a good ramping rate
Hydral Machines
30
In nuclear plants, the basic cycle is similar to that of fossil plant but the required heat is provided by the ________rather from burning fuels
nuclear reaction
31
The transmission line maybe _____ or _____depending upon the application
AC or DC
32
The Overhead AC lines are applied on power system at voltages in the range of
115KV TO 800KV
33
either solid round, stranded or bundled stranding provides flexibility
Conductors
34
acts as a shield to protect the energized conductors from lightning strokes
Groundwires
35
Suspend the energized phase conductors and insulate them from ground tower
Insulators
36
DC lines are sometimes called _________since they can be used to interconnect two systems operating at different frequencies
Asynchronous Ties
37
In this mode of transmission the _________ voltages and currents are converted to DC line and are converted back to AC at the other end
3 phase, 60hz
38
are used in very densely populated area but they are rarely used because they are more expensive as they are require insulating materials instead of air to separate the conductors from each other and from ground.
Underground Cables
39
the utilization of electric power is collectively called
loads
40
There are also some technical disadvantages associated with underground Cables. One major problem is the___________in the underground cables
very high capacitance inherent
41
The capacitance gives rise to ___________special equipment must be installed to compensate for the effect of charging currents which adds to the cost
charging current
42
Power Monitoring communication systems connected to _____________ can provide the trending and historical data necessary for future capacity growth.
Electronic Metering