In this study, a static synchronous series compensator
(SSSC) is used to investigate the effect of this device in controlling active
and reactive powers as well as damping power system oscillations in transient
mode. The SSSC equipped with a source of energy in the DC link can supply or
absorb the reactive and active power to or from the line. Simulations have been
done in MATLAB/SIMULINK environment. Simulation results obtained for selected
bus-2 in two machine power system shows the efficacy of this compensator as one
of the FACTS devices member in controlling power flows, achieving the desired
value for active and reactive powers, and damping oscillations appropriately.
KEYWORDS:
1.
Static synchronous series compensator (SSSC)
2.
FACTS
3.
Two machine power system
4.
Active and reactive powers
SOFTWARE: MATLAB/SIMULINK
Figure 1. Two machines system with SSSC
Figure
2. Active power of bus-2 without the installation of SSSC
Figure
3. Reactive power of bus-2 without the installation of SSSC
Figure
4. Current of bus-2 without the installation of SSSC
Figure
5. Voltage of bus-2 without the installation of SSSC
Figure
6. Active power of bus-2 in the presence of SSSC
Figure
7. Reactive power of bus-2 in the presence of SSSC
Fig.8.Current
of Bus-2 In The Presence Of SSSC
CONCLUSION:
It
has been found that the SSSC is capable of controlling the flow of power at a
desired point on the transmission line. It is also observed that the SSSC
injects a fast changing voltage in series with the line irrespective of the
magnitude and phase of the line current.
Based on obtained simulation results the performance of the SSSC has
been examined in a simple two-machine system simply on the selected bus-2, and
applications of the SSSC will be extended in future to a complex and
multimachine system to investigate the problems related to the various modes of
power oscillation in the power systems.
REFERENCES:
[1]
Gyugyi, L. (1989). “Solid-state control of AC power transmission.” International
Symposium on Electric Energy Conversion in Power System, Capri, Italy,
(paper No. T-IP.4).
[2]
Sen, K.K. (1998). “SSSC-static synchronous series compensator: theory, modeling
and publications.” IEEE Trans. Power Delivery. Vol. 13, No.1, January, PP.
241-246.
[3]
L. Gyugyi, 1994, “Dynamic Compensation of AC Transmission Line by Solid State
Synchronous Voltage Sources,” IEEE Transactions on Power Delivery, 9(22), pp.
904-911.
[4]
Muhammad Harunur Rashid, “Power Electronics – Circuits, Devices, and
Applications, “PRENTICE HALL, Englewood Cliffs, New Jersey.07632, 1988.
[5]
Amany E L – Zonkoly, “Optimal sizing of SSSC Controllers to minimize
transmission loss and a novel model of SSSC to study transient response, “Electric
power Systems research 78 (2008) 1856 – 1864.
