What is load curve?

What is load curve?
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1 Answer

Answer :

The curve showing the variation of load on the power station with reference to time is
known as a load curve.
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Related questions

Write short note on load duration curve?

Description : Write short note on load duration curve?

Last Answer : When the load elements of a load curve are arranged in the order of descending magnitudes, the curve thus obtained is called load duration curve. The load curve is obtained from the same data as ... the values of load factor and diversity factor, lower will be the overall cost per unit generated.

What is the difference between base load and peak load?

Description : What is the difference between base load and peak load?

Last Answer : The unvarying load which occurs almost the whole day is known as base load. The various demands of load over and above the base load is the peak load.

What is mean by base load?

Description : What is mean by base load?

Last Answer : The unvarying load which occurs almost the whole day on the station is known as base load.

Write the significance of load factor?

Description : Write the significance of load factor?

Last Answer : Higher load factor means greater average load, resulting in greater number of units generated for a given maximum demand. Thus, the standing charges, which are proportional to maximum demand ... units supplied and therefore overall cost per unit of electrical energy generated will be reduced.

Define load factor.

Description : Define load factor.

Last Answer : Load factor is the ratio of average demand to the maximum demand during a certain period of time and is applicable to both generating equipment and receiving equipment. Load factor = Average demand/Maximum demand

What is three part tariff?

Description : What is three part tariff?

Last Answer : The total charge comprised of fixed charge made during billing period, charge per kW of maximum demand and charge per kWh of energy consumed.

What are the important types of power factor tariff?

Description : What are the important types of power factor tariff?

Last Answer : (i) kVA maximum demand tariff (ii) sliding rate tariff (iii) kWh and kVAR tariff

What is plant use factor?

Description : What is plant use factor?

Last Answer : It is defined as the ratio of kwh generated to the product of plant capacity and number of hours for which the plant is in operation.

Define capacity factor.

Description : Define capacity factor.

Last Answer : It is the ratio of average demand to plant capacity

What are the important points to be taken into consideration while selecting the size and number of units?

Description : What are the important points to be taken into consideration while selecting the size and number of units?

Last Answer : variable demands from time to time. The nature of these demands can be seen from the load curve. The load variation is greater with a poorer load factor. units is per decided from the annual ... be a spare generating unit so that repairs and overhauling of the working units can be carried out.

What are the causes of low power factor?

Description : What are the causes of low power factor?

Last Answer : The following are the causes of low power factor otors are of induction type which have low lagging power factor. These motors work at a power factor which is extremely small on light load 0 ... KW of all electrical devices installed at the consumer's premises and connected to the supply system.

Define energy audit.

Description : Define energy audit.

Last Answer : Energy Audit means studying the energy consumption pattern in the utilities or equipments by obtaining necessary data analyse the same to identify the areas where wastages or loses occur and suggest ... avoid wastages or loss and also other consumption measures to ensure efficient use of energy.

What are the objectives of tariff?

Description : What are the objectives of tariff?

Last Answer : Electrical energy is sold at such a rate so that it not only returns the cost but also earns reasonable profit. Therefore, a tariff must cover the following items: transmitting and distributing equipment. equipment. costs etc.

What are the methods for determining depreciation charges?

Description : What are the methods for determining depreciation charges?

Last Answer : The decrease in the value of the power plant equipment and building due to constant use is known as depreciation. The cost of depreciation will depend on the size and type of equipment ... equals the cost of equipment. The methods commonly used for determination of annual depreciation charges are

What do you mean by utilization factor?

Description : What do you mean by utilization factor?

Last Answer : It is a measure of the utility of the power plant capacity and is the ratio of maximum demand to the rated capacity of the power plant. It is always less than unity. Utilization factor = Maximum ... exceeds unity, it means that the load has been carried in excess of rated capacity of the plant.

Define diversity factor.

Description : Define diversity factor.

Last Answer : Diversity factor is defined as the state of being dissimilar to one another. It is defined as the ratio of sum of the maximum demands of individual consuming units in a group during a specified period ... than one. If the diversity factor is higher, the cost per unit of generation will be lesser.

Explain the term depreciation.

Description : Explain the term depreciation.

Last Answer : The decrease in the value of the power plant equipment and building due to constant use is known as depreciation. In practice, every power station has a useful life ranging from fifteen to thirty years ... of the plant. This reduction in the value of plant every year is known as annual depreciation.

What do you mean by Economics of power generation?

Description : What do you mean by Economics of power generation?

Last Answer : The art of determining the per unit i.e. one KWh cost of production of electrical energy is known as Economics of power generation.

Which of the following statements describes what will occur if the motor shown in the illustration is required to carry 150% of full load? EL-0056 A. The primary counter emf will be increased. B. The stator current will increase. C. The slip will decrease. D. The slip value, stator current curve, and torque curve will all coincide.

Description : Which of the following statements describes what will occur if the motor shown in the illustration is required to carry 150% of full load? EL-0056 A. The primary counter emf will be increased. B. ... slip will decrease. D. The slip value, stator current curve, and torque curve will all coincide.

Last Answer : Answer: B

The torque and current curves for a three-phase induction motor with a cage rotor, are shown in the illustration. Which of the following statements is true concerning the depicted curves? EL-0056 A. As slip increases, rotor reactance decreases. B. The pullout point on the torque curve is about seven times the normal full load torque value. C. At stand still, stator current is 150% of normal. D. If the motor is loaded to the point where 40% slip has resulted, it will stall.

Description : The torque and current curves for a three-phase induction motor with a cage rotor, are shown in the illustration. Which of the following statements is true concerning the depicted curves? EL-0056 A. As slip ... D. If the motor is loaded to the point where 40% slip has resulted, it will stall.

Last Answer : Answer: D

Pick up the correct statement from the following: (A) For a uniformly distributed load, the shear force varies linearly (B) For a uniformly distributed load, B.M. curve is a parabola (C) For a load varying linearly, the shear force curve is a parabola (D) All the above

Description : Pick up the correct statement from the following:  (A) For a uniformly distributed load, the shear force varies linearly  (B) For a uniformly distributed load, B.M. curve is a parabola  (C) For a load varying linearly, the shear force curve is a parabola  (D) All the above 

Last Answer : (D) All the above 

Define Load Curve?

Description : Define Load Curve?

Last Answer : Load curve is a graphical representation between load in kW and time in hours. It. shows variation of load at the power station. The area under the load curve represents the energy generated in a particular period.

When the bending moment is parabolic curve between two points, it indicates that there is (a) No loading between the two points (b) Point loads between the two points (c) U.D.L. between the two points (d) Uniformly varying load between the two points

Description : When the bending moment is parabolic curve between two points, it indicates that there is (a) No loading between the two points (b) Point loads between the two points (c) U.D.L. between the two points (d) Uniformly varying load between the two points

Last Answer : (c) U.D.L. between the two points

For a simply supported beam, loaded with point load, the B.M.D. will be (a) A triangle (b) A parabolic curve (c) A cubic curve (d) None of these

Description : For a simply supported beam, loaded with point load, the B.M.D. will be (a) A triangle (b) A parabolic curve (c) A cubic curve (d) None of these

Last Answer : a) A triangle

The bending moment diagram for a cantilever with point load, at the free end will be (a) A triangle with max. height under free end (b) A triangle with max. height under fixed end (c) A parabolic curve (d) None of these

Description : The bending moment diagram for a cantilever with point load, at the free end will be (a) A triangle with max. height under free end (b) A triangle with max. height under fixed end (c) A parabolic curve (d) None of these

Last Answer : (b) A triangle with max. height under fixed end

Linear stress strain curve is for a (a) Load ∞ displacement (b) Load ∞ ( 1/displacement) (c) Load = ( displacement)2 (d) None

Description : Linear stress strain curve is for a (a) Load ∞ displacement (b) Load ∞ ( 1/displacement) (c) Load = ( displacement)2 (d) None

Last Answer : (a) Load ∞ displacement

Explain plate load test and draw a load settlement curve

Description : Explain plate load test and draw a load settlement curve

Last Answer : i) Plate load test is a filed test to determine the ultimate bearing capacity f soil and probable settlement under given loading. ii) The test essentially consist in loading a rigid plate, called bearing ... /hr xi) the results of test are plotted between settlement and load intensity

Explain with diagram load duration curve.

Description : Explain with diagram load duration curve.

Last Answer : It is drawn from load curve. It is graph of load (MW/KW) arranged in descending order of magnitude with respect to time. 

The load duration curve for unity load factor will be of

Description : The load duration curve for unity load factor will be of  (1) Rectangular shape (2) Triangular shape (3) L -shape (4) I -shape

Last Answer : The load duration curve for unity load factor will be of Rectangular shape

The yearly load duration curve of a power plant is a straight line...

Description : The yearly load duration curve of a power plant is a straight line. The maximum load is 750 MW and the minimum load is 600 Mw. The capacity of the plant is 900 MW. What is the capacity factor and utilization factor? 

Last Answer : 0.75, 0.83 is the capacity factor and utilization factor.

In a load curve the highest point represents?

Last Answer : In a load curve the highest point represents peak demand.

Load curve is useful in deciding the?

Last Answer : Load curve is useful in deciding the operating schedule of generating units, sizes of generating units, total installed capacity of the plant.

The area under a load curve gives?

Last Answer : The area under a load curve gives energy consumed.

A load curve indicates?

Last Answer : A load curve indicates average kWh (kW) energy consumption during the period.

Define swing curve?

Description : Define swing curve?

Last Answer : The swing curve is the plot between the power angle and time. It is usually plotted for a transient state to stydy the nature of variation in angle for a sudden large disturbance.

Explain the principle of operation of attracted armature relay with equation and characteristics curve.

Description : Explain the principle of operation of attracted armature relay with equation and characteristics curve.

Last Answer : Principle: It works on the principle that when a current is passed through a coil magnetic lines of force develop and the coil behaves like a magnet. When we place a magnetic material inside the coil it is ... ) time delay. If we want a time delay we can add a slug in the armature core.  

Draw the transformer drying out curve and explain each stage.

Description : Draw the transformer drying out curve and explain each stage. 

Last Answer : When we start the filtering process initially the temperature will be low, as the insulation value is high. But on temperature increases the IR value starts to decrease because the moisture ... value goes up and as the heaters are off the temperature decreases. This is the third stage.

Area under speed time curve gives a) Time b) Speed c) Distance d) None

Description : Area under speed time curve gives a) Time b) Speed c) Distance d) None

Last Answer : Ans: Distance