EQUAL AREA CRITERIA
For single machine system and infinite bus-bars a method known as “equal area criterion of stability” is employed. This method
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Electrical Engineering
System Stability Concepts
DIFFERENT FORMS OF STABILITY For the purpose of analysis there are mainly three stability conditions which are namely 1. Steady
Read MoreSHORT CIRCUIT OF A SYNCHRONOUS MACHINE (ON NO-LOAD)
When a fault occurs in a power system network, the current flowing is determined by the internal emfs of the
Read MoreFault Calculations
INTRODUCTION Whenever there is insulation failure of equipment in a power system or flashover of the lines initiated by a
Read MoreFORMATION OF YBUS MATRIX
YBUS can be formed using two methods namely. Direct inspection method Singular transformation method 1. Direct Inspection Method Let us
Read MorePROPERTIES OF A ZBUS MATRIX
(i) ZBUS can be obtained as inverse of YBUS given by (ii) In ZBUS matrix, the diagonal elements are short
Read MoreImpedance and Admittance Matrices
FORMULATION OF NODAL ADMITTANCE MATRIX Power system network can be analysed using either mesh current method or nodal voltage method.
Read MorePower Generation
INTRODUCTION Electrical energy is generated by conversion of energy available in different forms from different natural sources such as pressure
Read MoreTYPES OF STEPPER MOTORS
Variable-Reluctance Stepper Motors A variable-reluctance stepper motor consists of a single or several stacks of stators and rotors. Stators have
Read MoreSTEPPER MOTORS
The stepper motor is a special type of synchronous motor which is designed to rotate through a specific angle called
Read MoreTWO-PHASE SERVOMOTOR
SERVOMOTOR For a low-power (~300 W) control application, 2-phase balanced servomotor driven by ac amplifier is used in control applications.
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What is Power Electronics?
Power electronics combine power, electronics, and control. Control deals with the steady-state and dynamic characteristics of a closed-loop system. Power
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What is Power Systems?
Electrical Engineering What is Power Systems? Out of all the forms of energy, electric energy is the most important one
Read MoreDifference between Induction Motor and Transformer
Induction Motor Vs Transformer Transformer Induction Motor (i) Electrical to electrical conversion through high permeability core. (i) Electrical to mechanical
Read MoreExcitation Systems for Synchronous Machines
Definition :- The system which provides DC to the synchronous machine field winding to perform protective and control function of
Read MoreDC Machine Construction
A DC machine has two main parts stator and rotor. The stator of the machine does not move, i.e., stationary
Read MoreTypes of Transformers
Generally, there are two types of transformers, the core type and shell type. In core type the windings surround a
Read MoreSulphur Hexa Fluoride Circuit Breakers
What is Hexa Fluoride (SF6)? Sulphur Hexa Fluoride (SF6) gas has the following properties which makes it superior to other
Read MoreBUS Classification
In a power system each node or bus is associated with four quantities, such as magnitude of voltage, phase angle
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