Principles of power systems pdf download

Picture of the book: Arduino Pro…. Advanced Electrical Installation Work. Picture of the book : Advan…. Books Download Principles of Power Systems pdf. You can download the principles of Power Systems By V. K Mehta. This is a very beautiful book with attractive colors and stunning images.

He explained all the concepts of energy systems very clearly. You can get the idea behind every concept of power in a single read. You can use the power system principle by downloading kV Mehta for free in a doc format where the text in the image can be copied. Information about the book: Title : Principles of Power Systems. Language : English. Size : Pages : Format : pdf. Year : Edition : 4.

Author : V. Contents of the book: Unit 1: Introduction. Unit 2: Generating Stations. Unit 3: Variable Load on Power Stations. Unit 4: Economics of Power Generation. Unit 5: Tariff. Unit 6: Power Factor Improvement. Unit 7: Supply Systems. Unit 8: Mechanical Design of Overhead Lines. Unit 9: Electrical Design of overhead lines. Unit Performance of Transmission Lines. Unit Underground Cables.

Unit 12 :Distribution Systems — General. Unit D. Unit A. Unit Voltage Control. Unit Introduction to Switchgear. Unit Symmetrical Fault Calculations. Unit Unsymmetrical Fault Calculations. Unit Circuit Breakers. However, this method has limited application because : a it requires a large area for the generation of even a small amount of electric power b it cannot be used in cloudy days or at night c it is an uneconomical method.

Nevertheless, there are some locations in the world where strong solar radiation is received very regularly and the sources of mineral fuel are scanty or lacking. Such locations offer more interest to the solar plant builders. This method can be used where wind flows for a considerable length of time. The wind energy is used to run the wind mill which drives a small generator. In order to obtain the electrical energy from a wind mill continuously, the generator is arranged to charge the batteries.

These batteries supply the energy when the wind stops. This method has the advantages that maintenance and generation costs are negligible. However, the drawbacks of this method are a variable output, b unreliable because of uncertainty about wind pressure and c power generated is quite small. When water is stored at a suitable place, it possesses potential energy because of the head created. This water energy can be converted into mechanical energy with the help of water turbines.

The water turbine drives the alternator which converts mechanical energy into electrical energy. This method of generation of electrical energy has become very popular because it has low production and maintenance costs.

The main sources of energy are fuels viz. The heat energy of these fuels is converted into mechanical energy by suitable prime movers such as steam engines, steam turbines, internal combustion engines etc. The prime mover drives the alternator which converts mechanical energy into electrical energy. Although fuels continue to enjoy the place of chief source for the generation of electrical energy, yet their reserves are diminishing day by day.

Therefore, the present trend is to harness water power which is more or less a permanent source of power.

Towards the end of Second World War, it was discovered that large amount of heat energy is liberated by the fission of uranium and other fissionable materials. It is estimated that heat produced by 1 kg of nuclear fuel is equal to that produced by tonnes of coal. The heat produced due to nuclear fission can be utilised to raise steam with suitable arrangements. However, there are some difficulties in the use of nuclear energy.

The principal ones are a high cost of nuclear plant b problem of disposal of radioactive waste and dearth of trained personnel to handle the plant. Below is given their comparison in a tabular form : S. Particular Water-power Fuels Nuclear energy 1. Initial cost High Low Highest 2. Running cost Less High Least 3. Reserves Permanent Exhaustable Inexhaustible 4. Cleanliness Cleanest Dirtiest Clean 5. Simplicity Simplest Complex Most complex 6. Reliability Most reliable Less reliable More reliable 1.

The most important forms of energy are mechanical energy, electrical energy and thermal energy. Different units have been assigned to various forms of energy. However, it must be realised that since mechanical, electrical and thermal energies are interchangeable, it is possible to assign the same unit to them.

This point is clarified in Art 1. The unit of mechanical energy is newton-metre or joule on the M. The work done on a body is one newton-metre or joule if a force of one newton moves it through a distance of one metre i. The unit of electrical energy is watt-sec or joule and is defined as follows: One watt-second or joule energy is transferred between two points if a p.

In practice, for the measurement of electrical energy, bigger units viz. Heat is a form of energy which produces the sensation of warmth. Therefore, mechanical, electrical and thermal energies must have the same unit. This is amply established by the fact that there exists a definite relationship among the units assigned to these energies. It will be seen that these units are related to each other by some constant. The thermal units viz. The reader may note that units of electrical energy can be converted into heat and vice-versa.

This is expected since electrical and thermal energies are interchangeable. All these forms of energy can be converted into electrical energy by the use of suitable arrangement. In this process of conversion, some energy is lost in the sense that it is converted to a form different from electrical energy. Therefore, the output energy is less than the input energy.

The output energy divided by the input energy is called energy efficiency or simply efficiency Measuring efficiency of compressor. Mechanical energy is supplied to a d.

Introduction 7 Solution. Calorific value indicates the amount of heat available from a fuel. The greater the calorific value of fuel, the larger is its ability to produce heat. Below is given a table of various types of fuels and their calorific values along with composition. Particular Calorific value Composition 1.

However, liquid fuels can be burnt with a fair degree of ease and attain high temperature very quickly compared to solid fuels. However, liquid fuels leave no or very little ash after burning. This permits to meet the variation in load demand easily. Joule, watt v An alternator is a machine which converts Why is electrical energy preferred over other forms of energy?

Write a short note on the generation of electrical energy. Discuss the different sources of energy available in nature. Compare the chief sources of energy used for the generation of electrical energy. What do you mean by efficiency of a system? What are the advantages of liquid fuels over the solid fuels?