 PROJECTEES-
NISHANT SINGH KAMAL KANT YADAV
PRASHANT SHEKHAR SHAILESH SINGH
Project Guide :Manish Pathak

Objective

In this we are compensating the Reactive power
A. Active Power
B. Reactive Power
C. Apparent Power

What is Reactive power.
Need
Importance
Purpose
Sources

 In power system, real power and reactive
power is controlled by the voltage and phase
angle difference between the sending end
and receiving end respectively. Impedance of
the transmission line can also be used to
control real and reactive power. Flexible AC
Transmission Systems (FACTS) are used to
improve the power transfer capability of
transmission line.

 THYRISTOR CONTROL REACTOR
 THYRISTOR SWITCHED CAPACITOR
 STATIC VAR COMPENSATOR
 THYRISTOR SWITCHED SERIESCOMPENSATOR
 STATIC COMPENSATOR
 SELF COMMUTATED COMPENSATOR
 UNIFIED POWER FLOW CONTROLLER

 INCREASE THE CAPABILITY OF LOADING OF
LINES TO THEIR THERMAL CAPABILITES
 INCREASE THE SYSTEM SECURITY THROUGH
RISING THEIR TRANSIENT STABILITY LIMIT
 CONTROL OF POWER FLOW AS ORDERED
 REDUCE REACTIVE POWER FLOW

 Static synchronous compensator, is a
regulating device used on ac
current electricity transmission networks. It is
based on a power electronics voltage-source
converter and can act as either a source or
sink of reactive AC power to an electricity
network. If connected to a source of power it
can also provide active AC power It is a
member of the FACTS family of devices.

STATCOM (Static Synchronous Compensator)

Components mainly
used are :
 Coupling Transformer
 Voltage source
converter
 Capacitor bank
 STATCOM controller

 HARMONIC COMPENSATION IS NOT ACHIEVED
 PRESENCE OF FOUR PI CONTROLLERS MAKES
THE SYSTEM SLOW IN RESPONSE
 IT ALSO REDUSES THE STABILITY

 CONTINUOUS AND DYNAMIC VOLTAGECONTROL
 HIGH EFFICIENCY
 HIGH DYNAMIC VERY FAST RESPONSE TIME
 SINGLE PHASE CONTROL FOR UNBALANCED LOADS
 REACTIVE POWER COMPENSATION

 The static synchronous compensator (STATCOM) is
increasingly popular in power system application.
In general, power factor and stability of the utility
system can be improved by STATCOM.
 Statcom is able to provide rated current under
reduced voltage condition

 Voltage support and control
 Voltage fluctuation and flicker mitigation
 Unsymmetrical load balancing
 Power factor correction
 Active harmonics cancellation
 Improve transient stability of the power
system

 The STATCOM has the ability to provide more
capacitive reactive power during faults, or when the
system voltage drops abnormally, compared to
ordinary static var compensator. This is because
the maximum capacitive reactive power generated
by a STATCOM decreases linearly with system
voltage, while that of the SVC is proportional to the
square of the voltage. Also, the STATCOM has a
faster response as it has no time delay associated
with thyristor firing.

33

www.8051.in

 Ultra dynamic response (<10ms)
 No steps
 Ind. + cap. Capabilities
 Low harmonics no filters required
 Cheaper than SVC below §50MVAR

 Future work can involve multilevel STATACOM
to reduce harmonics in the system.Also more
practical sophisticated method may be
proposed to adress the minimization of
STATCOM capacity.
 STATCOM can be implemented with Predictive
Controller.

37
25