Principle: An electrical generator is a machine which converts mechanical energy into electrical energy. The energy conversion is based on the principle of the production of dynamically induced emf, where a conductor cuts magnetic flux, dynamically induced emf is produced in it according to Faraday’s Laws of electromagnetic Induction. This emf causes a current to […]
(1) By using a starting motor. This motor is directly coupled to the motor. It may be an induction motor which can run on a synchronous speed closer to the synchronous speed of the main motor. (2) Starting as an induction motor. This is the most usual method in which the motor is provided with
METHODS OF STARTING OF SYNCHRONOUS MOTOR Read More »
1. Shunt generators with field regulators are used for ordinary lighting and power supply purposes. They are also used for charging batteries because their terminal voltages are almost constant or can be kept constant. 2. Series generators are not used for power supply because of their rising characteristics. However, their rising characteristic makes them suitable
USES OF DC GENERATORS Read More »
Following are the three most important characteristics or curves of a dc generator: 1. No-load saturation Characteristic (E0/If): It is also known as Magnetic Characteristic or Open-circuit Characteristic (O.C.C.). It shows the relation between the no-load generated MMF in armature, E0 and the field or exciting current If at a given fixed speed. It is just the
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The advantages of using FACTS devices in electrical transmission systems are described below. 1. MORE UTILIZATION OF EXISTING TRANSMISSION SYSTEM In all the countries, the power demand is increasing day by day to transfer the electrical power and controlling the load flow of the transmission system is very necessary this can be achieved by more
BENEFITS OF UTILIZING FACTS DEVICES Read More »
Pilot bus or weak bus is defined as the bus which, when supported, improves voltage profile at all the buses and also ensures additional security to the system, in terms of increased loading margin. Usually, placing adequate reactive power support at the weakest bus enhances static voltage stability margins. The bus which is close to
WEAK BUS IDENTIFICATION Read More »
The basic Thyristor Controlled Series Capacitor scheme was proposed in 1986 by Vithayathil with others as a method of “rapid adjustment of network impedance”. A TCSC can be defined as a capacitive reactance compensator which consists of a series capacitor bank shunted by a thyristor-controlled reactor in order to provide a smoothly variable series capacitive
THYRISTOR CONTROLLED SERIES COMPENSATOR TCSC Read More »
STATCOM is a Static synchronous generator operated as a shunt-connected static VAR compensator whose capacitive or inductive output current can be controlled independent of the ac system voltage. STATCOM is one of the key FACTS Controllers. A STATCOM is a controlled reactive power source. It provides voltage support by generating or absorbing capacitors banks. It
STATIC SYNCHRONOUS COMPENSATOR STATCOM Read More »
ADVANTAGES OF PHOTOVOLTAICS: Fuel source is vast and essentially infinite No emissions, no combustion or radioactive fuel for disposal (does not contribute perceptibly to global climate change or pollution) Low operating costs (no fuel) No moving parts (no wear) Ambient temperature operation (no high temperature corrosion or safety issues) High reliability in modules (>20 years)
ADVANTAGES AND DISADVANTAGES OF PHOTOVOLTAICS Read More »
The shunt component is responsible for mitigating the power quality (PQ) problems caused by the consumer: poor power factor, load harmonic currents, load unbalance, DC offset, etc. The shunt active filter is responsible for power factor correction, compensation of load current harmonics and unbalances. It maintains constant average voltage across the dc storage capacitor Cdc.
OPERATION OF THREE PHASE THREE WINDINGS UNIFIED POWER QUALITY CONDITIONER Read More »