Explain power system analysis.

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asked Mar 11, 2018 by anonymous

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Summerise the role of power system engineer.

Last answer: Role of power system engineer: i. On the planning side he or she has to make decisions on how much electricity to generate ii. For operation of the power system he has to plan for ... for energy conservation and load management. viii. For solving the power system problems he has to update with

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asked Sep 8, 2018 by anonymous

State the functions of fuel system and exhaust system of a diesel power station.

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asked Sep 7, 2018 by anonymous

What is the choice of size and number of generator units in interconnected power system?

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asked Apr 30, 2018 by anonymous

The stability of the power system is not affected by

The stability of the power system is not affected by (1) generator reactance (2) line reactance (3) line losses (4) output torque

Last answer: The stability of the power system is not affected by line losses

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214 views 1 answer

asked Apr 30, 2018 by anonymous

Generally in a power system network, the load is represented as a :

Generally in a power system network, the load is represented as a : (A) Constant power in both load flow study and in stability study (B) Constant power in load flow study and constant impedance in stability study (C) Constant power in stability study and constant impedance in load flow study (D) Constant impedance in both load flow study and in stability study

Last answer: Generally in a power system network, the load is represented as a : Constant power in load flow study and constant impedance in stability study

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76 views 1 answer

asked Apr 29, 2018 by anonymous

A lightening arrester connected between the line and earth in a power system protects the terminal equipment

A lightening arrester connected between the line and earth in a power system (1) protects the terminal equipment against travelling surges (2) protects the transmission line against direct lightening strokes (3) suppresses high frequency oscillations in the line (4) reflects back the travelling wave approaching it

Last answer: A lightening arrester connected between the line and earth in a power system protects the terminal equipment against travelling surges

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71 views 1 answer

asked Apr 28, 2018 by anonymous

In voltage source converter based HVDC transmission system the active power is controlled by changing

In voltage source converter based HVDC transmission system the active power is controlled by changing (A) phase angle of the converter ac input voltage (B) supply frequency of the converter ac input voltage (C) magnitude of the converter ac input voltage (D) DC voltage at the inverter terminals

Last answer: In voltage source converter based HVDC transmission system the active power is controlled by changing phase angle of the converter ac input voltage

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99 views 1 answer

asked Apr 28, 2018 by anonymous

The benefit of power factor correction in a power system is

The benefit of power factor correction in a power system is (A) lower power consumption (B) increased demand charge (C) reduced load carrying capabilities in existing lines (D) reduced voltage profile

Last answer: The benefit of power factor correction in a power system is lower power consumption

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71 views 1 answer

asked Apr 28, 2018 by anonymous

If non-linear loads are connected to the power system, then

If non-linear loads are connected to the power system, then (A) displacement power factor is same as the total power factor (B) displacement power factor is not equal to the total power factor (C) displacement power factor is due to harmonic currents (D) total power factor is due to fundamental component of current

Last answer: If non-linear loads are connected to the power system, then displacement power factor is not equal to the total power factor

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76 views 1 answer

asked Apr 28, 2018 by anonymous

steady-state stability of a power system is improved by

Last answer: steady-state stability of a power system is improved by using double circuit line instead of single circuit line

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asked Apr 27, 2018 by anonymous

For a 15-bus power system with 3 voltage controlled buses, the size of Jacobian matrix is

Last answer: For a 15-bus power system with 3 voltage controlled buses, the size of Jacobian matrix is 25 x 25

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asked Apr 27, 2018 by anonymous

With fault clearing time, the transient stability of a power system

Last answer: With fault clearing time, the transient stability of a power system decreases

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asked Mar 25, 2018 by anonymous

Power factor of the system is kept high?

Last answer: Power factor of the system is kept high to reduce line losses, to maximise the utilization of the capacities of generators, lines and transformers, to reduce voltage regulation of the line.

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asked Mar 21, 2018 by anonymous

Commonly used instruments in power system measurement are?

Last answer: Commonly used instruments in power system measurement are induction.

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asked Mar 20, 2018 by anonymous

In a distribution system, in order to improve power factor, the synchronous capacitors are installed?

Last answer: In a distribution system, in order to improve power factor, the synchronous capacitors are installed at the receiving end.

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asked Mar 20, 2018 by anonymous

The primary reason for low power factor is supply system is due to installation of?

Last answer: The primary reason for low power factor is supply system is due to installation of induction motors.

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asked Mar 20, 2018 by anonymous

The steady state stability of the power system can be increased by?

Last answer: The steady state stability of the power system can be increased by connecting lines in parallel.

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asked Mar 20, 2018 by anonymous

Air blast circuit breakers for 400 kV power system are designed to operate in?

Last answer: Air blast circuit breakers for 400 kV power system are designed to operate in 50 millisecond.

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asked Mar 20, 2018 by anonymous

The contacts of high voltage switches used in power system are submerged in oil. The main purpose of the oil is to?

Last answer: The contacts of high voltage switches used in power system are submerged in oil. The main purpose of the oil is to extinguish the arc.

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136 views 1 answer