ANALYSIS OF SYMMETRICAL THREE PHASE SHORT CIRCUITS
In the analysis of symmetrical three-phase short circuits the following assumptions are generally made. 1. Transformers are represented by their…
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ADVANTAGES OF PER UNIT SYSTEM
PER UNIT SYSTEM The per-unit system expressed the voltages, currents, powers, impedances, and other electrical quantities basis by the equation:…
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CLASSIFICATION OF POWER SYSTEM BUSES
LOAD BUS A bus where there is only load connected and no generation exists is called a load bus. At…
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POWER FLOW STUDIES AND ITS IMPORTANCE
Power flow studies are performed to determine voltages, active and reactive power etc. at various points in the network for…
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SYNCHRONOUS MACHINE ROTOR TYPES
The magnetic rotor field is generated by a field winding F on the rotor which is fed with an adjustable…
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GRAPH THEORY TERMINOLOGY
Graph theory has many applications in several fields such as engineering, physical, social and biological sciences, linguistics etc. Any physical…
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CONSTRUCTION OF DC GENERATOR
The dc generators and dc motors have the same general construction. In fact, when the machine is being assembled, the…
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SINGLE PHASE AND POLYPHASE SYSTEMS
A system is single or polyphase depending upon whether the sources feeding it are single or polyphase. A source is…
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PRIMARY AND BACKUP PROTECTION
In the event of failure or non-availability of the primary protection some other means of ensuring that the fault is…