6.1. Introduction:
Transformers are widely used in power systems and it is considered as the most essential component of every power system. A transformer is a static device that works on Faraday’s law of electromagnetic induction and it is used to transfer electrical energy from one circuit to another or in other words it is a device which is used for decreasing or increasing the voltage of an alternating current. Basically there are two types of transformer i.e. step up and step down transformer but in general transformers are classified in different ways, depending upon their use, purpose, construction etc. Therefore transformer sizing helps us to select an appropriate type of transformer based on the purpose and use of transformer for a particular application.
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Why we need transformer in power system?
We need transformers in power system because of several reasons one most important reason is that electricity is generated at low voltages and in receiving end we also need low voltages but due to the high cost of transmitting low voltages and high currents we use step up transformers to step up the low voltage into high voltages and low currents which will also reduced the I2R losses during transmission of electricity and at receiving side this high voltage is step down to low voltage by using step down transformer.
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Why calculation of transformer sizing is necessary in power system?
Transformer sizing is necessary so that the selected transformer is capable of supplying the power needed by the load and also it can bear the inrush current without being damaged.
6.2. General Method Of Transformer Sizing:
The general method of transformer sizing follows five basic steps that are: Collection of data about the source and the load. Determine the KVA, Amperes or wattage required by the load Calculate the transformer size based on inrush current Characterize the impedance of
The second method of measuring three phase power is the useful for both balanced and unbalanced loads. By connecting a wattmeter with its current probes in series with red phase and volt probes between red and yellow phase. The second wattmeter should be connected with its current probes in series with the blue phase and the volt probes between the blue and yellow phases. By adding these two values together there total power for the system can be
My knowledge of engineering is reasonable and includes transformer substations, power plants, power distribution and transmission systems, industrial motor control and PLC programming, protective relay coordination, FACTS devices, grounding systems, Matlab programming and project management. In addition, I possess practical experience performing power flow, short-circuit and relay coordination analyses while using a power system modelling software such as ETAP, EDSA, DigSilent and CYME. Consequently, the aforementioned experience and solid engineering education along with your training will allow me to provide support to operating and new
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In order to decide upon the voltage and lengths of wire to use in the
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