Volume 15, Issue 4 (December 2019)                   IJEEE 2019, 15(4): 524-535 | Back to browse issues page

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Abstract:   (2897 Views)
This paper presents a novel impedance-based approach for out-of-step (OOS) protection of a synchronous generator. The most popular and commonly used approaches for detecting OOS conditions are based on the measurement of positive sequence impedance at relay location. However, FACTS devices change the measured impedance value and thus disrupt the performance of impedance-based relay function. In this paper, the performance of synchronous generator OOS protection function connected to the transmission line in the presence of a static synchronous compensator (STATCOM) is investigated. Moreover, an analytical adaptive approach is used to eliminate the effect of STATCOM. This approach requires only the remote bus voltage and current phasors to be sent to the relay location via a communication channel. Simulation results show that STATCOM changes impedance trajectory and causes the incorrect operation of OOS relay. Furthermore, the proposed approach corrects the relay mal-operation and improves the accuracy of OOS impedance-based function when the STATCOM is used in the system.‚Äč
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  • The dynamic response of STATCOM has been studied during OOS condition in the presence and absence of STATCOM.
  • Full detailed modeling of STATCOM in two modes (reactive power control and voltage regulation operation) is simulated and the effect of STATCOM on the performance of the OOS relay has been investigated.
  • An analytical approach is developed to eliminate the negative effect of STATCOM on measured impedance by the OOS relay. This approach uses the voltage and current phasor information sampled by PMU in the remote bus of the generator.

Type of Study: Research Paper | Subject: HVDC and FACTS
Received: 2019/03/10 | Revised: 2019/06/05 | Accepted: 2019/06/05

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