The document discusses flexible alternating current transmission systems (FACTS) and their applications. FACTS use static equipment to increase the reliability and efficiency of AC power grids. They improve power transmission by supplying reactive power to the grid. Key FACTS devices include series compensation, shunt compensation, and static synchronous compensators. FACTS allow for more control of power flows and increase the capacity of transmission lines. Their use is growing to help meet rising electricity demands.

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POWER SYSTEM AND ITS APPLICATION
HARISH KETAVARAPU &KAMALNATH POTNURU
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CONTENTS
Introduction To Power Systems
FACTS
Opportunities On FACTS
FACT Key Devices
Application Of FACTS
FACTS For The Future
Conclusion
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POWER SYSTEMS
An electric power system is a network of electrical
components used to supply, transmit and use electric
power.
APPLICATION OF POWER SYSTEM
•Smart grid
•Load Shedding/Peak Shaving
Generation and distrubution
Automatic Throwover
FACTS
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FLEXIBLE ALTERNATING CURRENT TRANSMISSION
SYSTEMS(FACTS)
 A flexible alternating current transmission system (FACTS) is a
system composed of static equipment used for the AC
transmission of electrical energy.
They increase the reliability of AC grids and reduce power
delivery costs.
They improve transmission quality and efficiency of power
transmission by supplying inductive or reactive power to the grid.
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OPPORTUNITIES
 Control power so that it flows on the desired
routes.
 Increase loading capacity of transmission lines.
 Increases system security.
 Improve generation productivity.
 Effective use of upgrading/ uprating.
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FACTS KEY DEVICES
1. Series compensation
2. Shunt compensation.
3.Static Synchronous Compensator
(STATCOM).
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Series compensation
 FACTS is connected in series with the power system.
 It works as a controllable voltage source.
 On long lines, when a large current flows, this causes
a large voltage drop.
 To compensate, series capacitors are connected,
decreasing the effect of the inductance..
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Shunt compensation
 In shunt compensation, power system is
connected in shunt (parallel) with the FACTS.
 . It works as a controllable current source
 Shunt compensation is of two types:
1.Shunt capacitive compensation
2. Shunt inductive compensation
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Shunt capacitive compensation
 This method is used to improve the power factor.
 Whenever an inductive load is connected to the
transmission line, power factor lags because of
lagging load current.
 To compensate, a shunt capacitor is connected which
draws current leading the source voltage.
 The net result is improvement in power factor.
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Shunt inductive compensation
 This method is used either when charging
the transmission line, or, when there is very low load
at the receiving end
 Shunt capacitance in the transmission line causes
voltage amplification .
 To compensate, shunt inductors are connected across
the transmission line.
 The power transfer capability is thereby increased .
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Static Synchronous Compensator
(STATCOM)
It is a static synchronous generator as
shunt static var compensator whose
capacitive or inductive current can be
controlled independent of the system
voltage.
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APPLICATION
• This research will investigate the use of
renewable dispersed energy system (wind-small
hydro, hybrid scheme) and resulting grid
interface problems and need for effective
mitigative FACTS-based solution.
• Both stand-alone and grid connect wind
energy conversion is not found yet
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FACTS FOR THE FUTURE
 FACTS technology can increase the loading on
existing systems and assist in directing power flow in
an interconnected network.
 The first element in this work is to develop large
semiconductors capable of handling power-class
voltages and currents.
 The increasing demand for electricity owing to the
growing population and economic development
worldwide is the most important factor in the growth
of the global FACTS market.
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CONCLUSION
 FACTS technology provides an alternative to building new
power transmission lines or power generation facilities.
 It is a comparatively inexpensive and fast way to provide
more power and control in existing networks, with minimal
environmental impact.
 FACTS solutions help power companies increase transmission
capacity over existing AC power lines, providing fast voltage
regulation, active power control and load flow control in
meshed power systems.
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