Methods of Voltage Control in Power System In a modern power system, electrical energy from the generating station is delivered to the ultimate consumers through a network of transmission and distribution. For satisfactory operation of motors, lamps and other loads, it is desirable that consumers are supplied with substantially constant voltage. Too wide variations of […]
Testing of Power Capacitors Power capacitors are an integral part of the modern power system. These are used to control the voltage profile of the system. The following tests are carried out on shunt power capacitors (IS 2834): Routine Tests Routine tests are carried out on all capacitors at the manufacturer’s premises. During testing, the
Testing of Overhead Line Insulators Various types of overhead line insulators are (i) Pin type (ii) Post type (iii) String insulator unit (iv) Suspension insulator string (v) Tension insulator. Arrangement of Insulators for Test The string insulator unit should be hung by a suspension eye from an earthed metal cross arm. The test voltage is
Voltage Distribution Over Suspension Insulator String Suspension Insulators: As the voltage level increases, pin-type insulators become very bulky and their cost also increases rapidly. Hence the most popular insulators used for very high voltage transmission lines are suspension-type insulators. These insulators have several porcelain disc units. These units are connected in series with the help
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Testing of Power System Insulators The insulators are tested according to the standards. The following tests are performed while testing an insulator : These tests are further grouped into three classes according to the standards which are, Type tests: These tests are performed to judge the design and specified ratings of the insulator. These tests
In modern power systems, the power flow in the transmission lines can be controlled with the use of power electronics. The Flexible A.C. Transmission Systems (FACTS) give solutions to the problems and limitations that were introduced in the power system with the introduction of power electronics-based control for reactive power. The FACTS technology making use
Hi friends, In this article, I am going to discuss components of HVDC system, working, types, advantages and disadvantages of the HVDC transmission system. I hope you will find it useful and exciting. Transmission and distribution of electric power are done using alternating current, mainly due to economic reasons. However, due to the development of
As per present terminology, voltages less than 300 kV are termed as High Voltages. The voltages in the range of 300 kV to 765 kV are known as Extra High Voltages (EHV). The voltages which are 765 kV are termed as Ultra High Voltage (UHV). In India, transmission voltage ranges from 66 kV to 400
The following connection schemes of the power distribution system are generally employed: Radial Distribution System In a radial distribution system, separate feeders radiate from a single sub-station and feed the distributors at one end only. A single-line diagram of a radial system for AC distribution is shown in the figure. Here substation supplies power to
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The distributors of AC and DC distribution system are generally classified as per the way they are being fed by the feeders. The main distributor types in power system are as under: Distributor Fed at One End In this type, the distributor is connected to supply at one end and loads are tapped at different