Abstract
Problem Statement: Static Synchronous Compensator (STATCOM) and Static Synchronous Series Compensator (SSSC) have been individually applied to improve stability of power system. Approach: This study presents the coordination of a STATCOM and SSSC for improving power system stability. The swing curves of the three phase faulted power system with various cases are tested and compared. Results: The swing curve of system without FACTS devices has undamped oscillation. The system with a STATCOM or a SSSC can increase damping of power system whereas the system with coordination of a STATCOM and a SSSC provides the best results of stability improvement Conclusion: From the simulation results, the stability of power system can be much better improved by coordination control of a STATCOM and a SSSC.
Highlights
In modern power systems, there exists a continuous challenge to improve stability of power system
This study presented the coordination of series and shunt FACTS devices based voltage source converter for improving transient stability of power system
The Static Synchronous Series Compensator (SSSC) is series FACTS devices and it is represented by series voltage injection
Summary
There exists a continuous challenge to improve stability of power system. Transmission System (FACTS) devices based on the rapid development of power electronics technology to improve stability of power system. The first group of FACTS devices uses the Thyristor to control the reactors or capacitors. The second group of FACTS devices uses more advanced power electronic to control power flow of power system. Compensator (SSSC) are the member of the FACTS family that are connected in shunt and in series with power system as shown in Fig. 1 and 2, respectively. The STATCOM can electrically mimic reactor and capacitor by injecting a shunt current in quadrature with the line voltage Fig. 2: Schematic diagram SSSC. The presented mathematical model has shown that power flow with combination of a TCSC and SVC can be controlled both series and shunt reactance.
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