Impact of SSSC and STATCOM on power system predictability

• SSSC can improve active power flow predictability a bit comparing to base system.
• SSSC can impair active power flow predictability index, severely.
• SSSC decreases voltage predictability index in comparison to system without SSSC.
• STATCOM almost improves active power flow predictability comparing to base system.
• STATCOM will improve voltage predictability index.

In power systems with the high penetration of renewable energies such as wind powers, accuracy in predicting power system state is really important, especially in bidding strategies, risk management and operational decisions. In this paper, the impact of STATic COMpensator (STATCOM) and Static Series Synchronous Compensator (SSSC) on predictability of power system is studied. For this investigation, predictability indices are utilized. This paper clarifies some important questions and concerns about power system such as; do the STATCOM and SSSC improve or impair the predictability of system state? Also, this paper warns the operator of system about ignoring the predictability concept in FACTS included power systems. Moreover, the necessity of utilizing predictability indices in optimization problems beside conventional objectives, such as losses, is discussed. The results are discussed on IEEE 14 and 57 bus test systems.