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Controlling of transformer from substation ppt


controlling of transformer from substation ppt

Substations PowerPoint Presentation, download Presentation.
Power Transformers: To step-up or step-down the from voltage Except at the transformer power station, all the subsequent sub-stations use step-down transformers.The secondary winding consists of a few turns and provides for controlling measuring instruments and relays a voltage which is a known fraction of the line voltage.Figure 4-3 shows a three phase transformer bank.Transformer, transformer, for example, the transformer in Figure 4-4 has a turns ratio of 2:1 Primary side Secondary side.39 (ii) Single Bus-Bar System with Sectionalisation The single transformer bus-bar is divided into 2 or 3 sections Load is equally distributed on all the sections.Generally, the incoming and outgoing lines remain connected to the main bus-bar.Frequency Power Factor 5, factors governing the selection substation of site.Power transformers are used transformer to convert high voltage power to low-voltage power and vice versa.Then step-down transformers convert the power to subtransmission, as in Figure 4-1, or distribution voltages, as in Figure 4-2, for further transport or consumption.As discussed earlier, raising controlling the voltage (i.e., like on transmission lines) lowers the current and thus significantly lowers system from losses.Transformer Autotransformers Autotransformers are a specially constructed variations of regular two winding transformers.Frequently used for voltages exceeding 33kV.The signal is transmitted to PC through LPT interface. There are several bus-bar arrangements The choice depends upon various factors such as system voltage, position of sub-station, working degree of reliability, cost etc.
Pole-mounted sub-stations: These are used for distribution purposes only Equipment installed overhead on H-pole or 4-pole structure It is the controlling cheapest form of sub-station 11, comparison between Outdoor and Indoor Sub-Stations.
If the current in the line is 100 A, then explorer current in the secondary will.
Near the load centre (at the centre of gravity of load) of its service areas.
Instrument Transformer, instrument Transformer, instrument Transformer, potential Transformers Similarly, potential transformers (PTs) are used to homes scale down very high voltages to levels that are safer to work with.
Each bus-section behaves as a separate bus-bar.
Autotransformer Today's Free PowerPoint Template For SlideServe users Download Now 2019 SlideServe.The output from the rectifier unit is a pulsated dc output.Figure 4-12 shows how a PT is connected.The AC signal from the transformer circuit is then given to a precision rectifier unit.The voltage project level of each load is measured by using a potential transformer.The potential transformer steps down the voltage level to 6 volts which is an AC signal.The AC signal from the transformer circuit is then given to a precision rectifier unit.Instrument transformers: The lines in sub-stations operate at high voltages and carry current of thousands of amperes The measuring instruments and protective devices are designed for low voltages (generally 110 V) and currents (about 5 A) They will not work satisfactorily if mounted directly This.Normally substation contains following equipments: Transformers.The sub station charlotte voltage is also measured by using a potential transformer.The potential transformer steps down the voltage level to 6 volts which is an AC signal.Switching is somewhat complicated while maintaining a breaker.Transformers combine these principles by using two coils of wire and a changing voltage source.Industrial sub-stations: Industrial consumers (huge amounts games of power) Individual sub-stations 9, according to Design (Constructional features a sub-station has many components (e.g.Transformers can be single phase, three phase, or banked together to operate as a single unit.Phase shifting transformers Phase shifting transformers are used to control power flow between tie lines.


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