In a multi machine interconnected system, subsequently to a 3-phase fault, the transient stability is examined by 

In a 3-phase, 5 kV, 5 MVA system, what is the base impedance? 

In an n-bus power system, considering n-nodes network, the size of Y_bus is

The voltage of a particular bus can be controlled by controlling the_________. 

Which of the following buses are used to form bus admittance matrix for load flow analysis?

1. Load bus

2. Generator bus

3. Slack bus 

Equal-area criterion is employed to determine

In differential protection of bus-bars the CT ratio 

The changes in real bus power affects mainly

The size of bus admittance matrix for the sing line diagram shown in the figure is________.

In a power system there are 50 buses

Slack bus = 1 

Generator buses = 8 

Load buses = 41

By Newton- Raphson method, the size of the jacobian matrix =_________.

In power system load flow studies, the quantities specified at a slack bus are________and______.

Select the wrong statement from the following in relation to power flow analysis

Load frequency controllers are carried out with 

For formation of the Y bus matrix (using node voltage analysis) in power system network modeling is used 

Steady state stability of a power system is improved by 

In Gauss-Seidel load flow method, the number of iterations may be reduced if the correction in voltage at each bus is multiplied by 

In a power system network, At which bus, the shunt is connected that can be known from 

For a graph of power system network shown in the figure below, where bus numbers and impedances are marked, assuming equal R/X of impedances, find the bus impedance matrix element Z₂₂.

The Y_bus  matrix is a sparse matrix because :

Load flow studies must be made on a power system before 

In G-S method of power flow problem, the number of iterations 

What is the form of the  Y_bus matrix for carrying out load flow studies by Gauss-Se method of a power system having mesh connection of nodes? 

For load flow studies, what are the quantities specified at load bus?

The per unit value of a 4 resistor at 100 MVA base and 10 kV base voltage is

Which of the following quantities are normally specified at the voltage controlled bus for a load flow solution?

Which one of the following statements is correct?

The elements of each row of a Y_bus matrix for load flow studies in power system add up to zero. 

A sample power system network is shown in the figure given below. The reactances marked are in p.u. What is the pu value Y₂₂ of of the bus admittance matrix (Y_bus)?

Consider the following statements in respect of load flow studies in power system :          

1. Bus admittance matrix is a sparse matrix

2. Gauss-Seidel method is preferred over Newton Raphson method for load flow studies

3. One of the buses is taken as slack bus in load flow studies

Which of these statements are correct? 

Consider the following quantities :

1. Real power

2. Reactive power

3. Power factor

4. Input current

5. Bus voltage magnitude

6. Bus voltage phase-angle

For the purpose of the load flow studies of a power system, each bus or node is associated with which one of the combination of the above four quantities? 

A bus bar is rated by 

A equipment has an impedance of 0.9 pu to a base of 20 MVA, 33 kV. To the base of 50 MVA, 11 kV, the pu impedance will be

The  Y_bus of the model of transformer shown is :

Base impendence of the power system is given by :

A transmission line has a reactance of 1 Pu is operating at V_s = V_r = 1pu. The generator is connected at source and which is delivering 0.5 Pu of active power. Find the load angle

The bus bar zone faults are generally 

Fault calculations using computer program are usually done by

In Newton Raphson method, the convergence is not affected by the choice of 

Stability of a power system can be improved by :

1. Using series compensations

2. Using parallel transmission lines

3. Reducing voltage of transmission

Which of the above statements are correct? 

The Y_bus   matrix of a 100 bus interconnected system is 90% sparse. Hence the number of transmission lines in the system must be :

Normally Z_bus  matrix is a :

The principal information obtained from load flow studies in a power system are :

1. Magnitude and phase angle of the voltage at each bus.

2. Reactive and real power flows in each of the lines.

3. Total power loss in the network.

4. Transient stability limit of the system.

Select the correct answer using the codes given below : 

For a load bus of a power system, the specified quantities are : 

In load flow studies, the quantities specified a generator bus of a power system are_______.

In a power system, each bus or anode associated with how many quantities?

For the bus admittance matrix (Y_bus) of a 4-bus system given in per unit, the buses having shunt elements are________.

A transmission line has 0.2 pu impedance on a base of 132 kV, 100 MVA. On a base of 220 kV, 50 MVA, it will have a pu impedance of_________.

The  representation of the model of transformer shown is :  

The relation between the old and  new per unit impedance values is given by :

The bus admittance matrix of a power system is given as

 

The impedance of line between bus 2 and 3 will be equal to                

The test used to locate high-resistance faults in low-resistance conductor circuits is :