1 Answer

Answer :

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

Related questions

Description : The steady state stability limit as compared to the transient state stability limit is always

Last Answer : The steady state stability limit as compared to the transient state stability limit is always Greater

Description : The steady state error of the system can be minimized by

Last Answer : The steady state error of the system can be minimized by increasing gain k

Description : 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

Description : 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

Description : Stability of a transmission line can be increased by

Last Answer : Stability of a transmission line can be increased by Shunt capacitor, Series capacitor

Description : 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

Description : In order to regulate steady state error to zero, in a negative feedback control system, one employs

Last Answer : In order to regulate steady state error to zero, in a negative feedback control system, one employs Integral control

Description : Which of the following statements is true?  (1) steady-state stability limit is greater than transient stability limit  (2) steady-state stability limit is equal to transient stability ... made regarding the equality or otherwise of the steady-state stability limit and transient stability limit

Last Answer : Which of the following statements is true?  (1) steady-state stability limit is greater than transient stability limit  (2) steady-state stability limit is equal to transient ... made regarding the equality or otherwise of the steady-state stability limit and transient stability limit

Description : If the load of the normally excited synchronous motor is increased the power factor will?

Last Answer : If the load of the normally excited synchronous motor is increased the power factor will become lagging.

Description : 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 ... 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

Description : 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

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

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.

Description : State the losses in secondary distribution system. 

Last Answer : The losses in secondary distribution system: a) Technical losses: 1. Due to poor voltage 2. Due to unbalance load 3. Due poor quality of transformer & its components 4. Due to poor quality ... of induction type of energy meter. 3. Lack of administration. 4. Energy theft 5. Unmetered supply

Description : Define stability. Sketch the root locations in the s-plane for stable and unstable system.

Last Answer : Stability: The system is said to be stable if it produces bounded output for a bounded input. It is used to define usefulness of the system. The stability implies that the system performance should not ... absence of the input, output may not return to zero it shows certain output without input. 

Description : The 'Equal area criterion' for the determination of transient stability of a synchronous machine connected to an infinite bus  (1) ignores line as well as synchronous machine resistance ... consideration the possibility of machine losing synchronism after it has survived during the first swing.

Last Answer : 1

Description : If stability error for step input and speed of response be the criteria for design, what controller would you recommend (1) P controller (2) PD controller (3) PI controller (4) PID controller

Last Answer : If stability error for step input and speed of response be the criteria for design, what controller would you recommend (1) P controller (2) PD controller (3) PI controller (4) PID controller

Description : Improvement of transient stability using SVC

Last Answer : Improvement of transient stability using SVC The static VAR compensator (SVC) is a shunt connected FACTS device. SVC have two modes one is inductive ... ;transmittable power. Transient stability improvement can be estimated using equal area criterion.

Last Answer : As the load is increased the speed of D.C. shunt motor will reduce slightly.

Last Answer : The increased load during summer months is due to increased use of fans and air conditioners.

Last Answer : If the supply frequency to the transformer is increased, the iron loss will increase.

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

Last Answer : Fuel system: It supplies fuel to engine for combustion purpose. It consists of Fuel Pump: - It supplies fuel to engine for combustion purpose. Strainer: - Are provided to remove suspended impurities and ... most of the noise. Chimney:- To exhaust gases in the atmosphere as high as possible. 

Description : 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

Description : Explain starting system in diesel electric power plant.

Last Answer : Starting system in Diesel Electric Power Plant: It includes Storage battery, compressed air tanks, self-starter etc. The purpose of engine starting system is to rotate the engine initially while ... as Ammeters, Voltmeters, Wattmeters, Thermometers, Pressure gauges, Visible and audible alarm etc.

Description : Explain fuel system and air intake system in diesel electric power plant.

Last Answer : Fuel system and air intake system in diesel electric power plant :  Fuel system: It consists of storage tank, strainers, fuel transfer pump and all day fuel tank. The fuel oil is supplied ... Filters are provided to remove dust particles from air which may act as abrasive in the engine cylinder.

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

Last Answer : Choice of Size and Number of Generating Units: 1. The size/rating and number of generating units in such way that they approximately match with the load curve as closely as possible. 2. In ... , if power plant is connected to grid system then generating unit of higher capacity can be installed.

Description : 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 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 

Description : 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

Description : 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

Description : 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 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

Description : 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.

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

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

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

Description : What is sag in power system?

Last Answer : Sag is a catenary curve in between two points of supporters.and also we can say the lowest point of the conductor in between the two points of supporters. 

Description : What are interconnected power system?

Last Answer : Interconnected power systems are those which connect different geographic regions. In Australia we have a National Electricity Grid which connects 6 states. Transfers of power occur between the states depending ... make more profit from this.National-Electricity-Market-Fact-Sheet.pdf (0,9 MB)

Description : What is meant by feeder in power system?

Last Answer : A feeder line is a peripheral route or branch in a network which connects smaller or more remote nodes with a route or branch carrying heavier traffic. The term is applicable to any system based on a hierarchical network.

Description : What are the components of a power system?

Last Answer : generator Traansformer Conductors Insulators

Description : A solid state relay (A) withstands voltage transients (B) does not require auxiliary dc supply (C) provide low burden on CT and P (D) does not provide earth fault protection

Last Answer : A solid state relay provide low burden on CT and P

Description : Why is there no formula to compute the half-life of any given radioisotope?

Last Answer : I don’t think the theories contain enough information about what is actually going on with subatomic particles that leads to those results.

Description : How can the steady-state error in a system be reduced?  (1) By decreasing the type of system (2) By increasing system gain (3) By decreasing the static error constant (4) By increasing the input

Last Answer : How can the steady-state error in a system be reduced?  (1) By decreasing the type of system (2) By increasing system gain (3) By decreasing the static error constant (4) By increasing the input

Description : In quadrilateral speed-time curve of electric traction system, the accelerations during successive time periods are ______ respectively.  (A) positive, negative and negative (B) positive, zero and negative (C) positive, positive and negative (D) positive, negative and zero

Last Answer : In quadrilateral speed-time curve of electric traction system, the accelerations during successive time periods are positive, negative and negative respectively. 

Last Answer : In a single bus-bar system there will be complete shut down when fault occurs on the bus itself.

Last Answer : A balanced 3-phase system consists of positive sequence currents.

Last Answer : Ungrounded neutral transmission system is not recommended because of system insulation being overstressed due to over voltages, insulation overstress may lead to failure and subsequent phase to phase faults, being inadequately protected against ground fault.

Description : Explain the on state losses in power BJT.

Last Answer : On state losses in power BJT: Transistor have four types of losses one is turn on state losses second is turn off state losses third is turn on switching losses and fourth is turn ... ON = VCE sat x IC With increasing collector current collector to emitter saturation voltage increases.

Description : The main disadvantages of having poor power factors are:  (A) High cost of station and distribution equipment (B) Poor voltage regulation (C) High energy loss in conductor (D) All of the above

Last Answer : The main disadvantages of having poor power factors are:  (A) High cost of station and distribution equipment (B) Poor voltage regulation (C) High energy loss in conductor (D) All of the above

Description : The reactive power transfer over a line mainly depends on

Last Answer : The reactive power transfer over a line mainly depends on lVsl- lVRl

Description : To protect the power transformer (Y-Y with neutral grounded) against fault, what type of connection do the CTs have ?

Last Answer : To protect the power transformer (Y-Y with neutral grounded) against fault, what type of connection do the CTs have ? Δ-Δ connection