Majority
of distribution substations are of.... type,
According
to general practice, the land required for a 400 kV substation is_________.
What is the voltage value for high voltages substation?
The substation has following items
Which
of the following equipment is not installed in a substation?
The
industrial substations step down received voltage at
Find
the current rating of the following system. An outdoor pole-mounted 11 kV/415V
substation has to be installed for supply to an area having a load of 63 kVA.
Pole
mounting substations are also known as :
In
outdoor substations minimum bushing height of H.T. end from ground is
Which
of the following is NOT the equipment used in substations?
In substation which of the following devices is a carrier communication
device?
Which component the substation to the area where power is to be
distributed?
In order to improve the power factor device is employed in the
substation
Stones
are provided in the substation to :
According to the latest practice, the land required for 132 kV
substation is :
Which
of the following is not function of substation batteries?
In
sub stations for making and breaking of load current
The
voltage between the feet of a person standing on the floor of substation with
0.5 m spacing between two feet during the flow of earth fault current is known
as_________.
During
the insulation co-ordination in the sub station, the lowest insulation strength
is at
The
representation of a power system using the simple symbol for each component is
known as :
line
has 0.2 per unit impedance. On a base of 220 kV, 50 MVA, it will have a per
unit impedance of :
Which
of the following is the wrong statement in terms of slack bus?
If
the actual clearing angle is greater than the critical clearing angle, the
system is
In load flow study, a PV bus is treated as a PQ bus when
The
steady state stability of the power system can be improved by
Which
of the following method is not economical in improving the transient stability
of a power system?
In a power system, which of the following is/are critical clearance time of a fault related to?
1.
Transient reactance
2.
Sub-transient reactance
3.
Reactive power limit
4.
Transient stability limit
Transient
state stability is generally improved by
For
a fault in a power system, the term critical clearing time is related to
Which
of the following does not affect the stability of a system?
Normally the angle of the transmission line is kept_______because
of_______reasons.
Differential
equation is required to be solved in :
Which among the following method is used to improve the transient
stability of power system?
Critical
clearing angle is related to
If
a voltage controlled bus is treated as a load bus, then which one of the
following limits would be violated?
A voltage control bus is characterized by the specified
The infinite busbar has
The line reactance's of a power network are as follows :
|
Line No. |
From Bus |
To Bus |
Reactance |
|
1 |
0 |
1 |
0.2 p.u. |
|
2 |
1 |
2 |
0.4 p.u. |
The bus impedance matrix with
The
power transfer capability of a transmission line is the most affected
by_________.
In a 3-phase ac power transmission system using synchronous generation
For
stability and economic reasons, the transmission line is operated with the
power angle in the range
The
number of iterations required to reach convergence in Gauss Seidal method of
load flow analysis are_______.
The voltage angle of_________bus is normally taken as zero for
conducting load flow.
Load
flow study is carried out for
Pick up the correct statement from the following with respect to power
system networks?
Steady-state
stability of a power system is the ability of the power system to
Which
one of the following matrices reveals topology of the power system network?
Which type of bus bar system is being depicted in the given figure?
A
12-bus power system has slack bus and 4 voltage controlled buses. For the load
flow analysis using Newton-Raphson method in polar coordinates, the size of the
Jacobian matrix is________.
Consider
the following statements: Stability studies constitute
1.
The major analytical approach to the study of power system electro-mechanical
dynamic behaviour.
2.
The involvement of one or just a few machines undergoing slow or gradual
changes in operating conditions.
3.
The determination of the locus of essentially steady-state operating points of
the system.
4.
The determination of whether or not the rotors of the machines being perturbed,
return to the constant speed operation.
Which
of these statements the correct?