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Abstract

This paper present the study on the performance of Numerical Distance relays settings on transmission lines (zones i.e. Z-1, Z-2, Z-3 and power swing setting) compensated by FACTS (Flexible AC transmission system). The FACTS are used for controlling voltage and power flow, reactive power. The total impedance of line i.e Zp and secondary impedance Zs and zones setting without FACTS and with FACTS are protected by numerical relay are calculated and investigated. The modified setting Zones of protection have been calculated to improve the performance of Distance numerical relay and prevent unnecessary tripping of respected breaker. The simulation results are performed in MATLAB software and MD2000 software and show the impact of change in settings in zones and power swing settings.

References

1. m. Noroozian, SM IEEE AKE, N Petersson, B. Thorvaldson, NO A Nilsson ABB utitites, FACTS Division “Benefits of SVC and STATCom for electric utility Application

2. Mason C.R. The art and science of protective relaying, New York, USA john Wiley & sons, inc. 1956

3. A kazemi, S. Jamali, Efffects of STATCOM on distance relay tripping Characteristic” IEEE/PES.

4. H. Abiniki, A Salah, faculty of computer and electrical engineering university of Tehran “Precise analysis power swing effects on distance protection relay”

Keywords

Transmission line, Numerical Distance relay, Primary and secondary impedance, Setting of Zones and power Swing settings. FACTS device i.e SVC, TCR and TSC.