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STATCOM/SVC impact on the performance of transmission line distance protection
Author(s) -
Khederzadeh Mojtaba,
Ghorbani Amir
Publication year - 2011
Publication title -
ieej transactions on electrical and electronic engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.254
H-Index - 30
eISSN - 1931-4981
pISSN - 1931-4973
DOI - 10.1002/tee.20691
Subject(s) - relay , tripping , fault (geology) , transmission line , electrical impedance , control theory (sociology) , protective relay , digital protective relay , electric power system , electric power transmission , line (geometry) , power (physics) , flexible ac transmission system , limiter , transmission (telecommunications) , engineering , electrical engineering , computer science , control (management) , mathematics , circuit breaker , physics , power flow , quantum mechanics , artificial intelligence , seismology , geology , geometry
The impact of 48‐pulse STATCOM/SVC on the apparent impedance seen by the transmission line distance relay is investigated in this paper. Analytical results are presented and verified by detailed simulations. The STATCOM/SVC control systems are modeled in full details and practical constraints are applied. It is shown that the presence of a current limiter in the control system of STATCOM could significantly mitigate the impact of STATCOM on the relay's calculated apparent impedance. Six different phase‐to‐phase and phase‐to‐ground measuring units of the distance relay are simulated to resemble the behavior of the relay. It is shown that the impact of SVC on the apparent impedance seen by the phase‐to‐ground fault measuring units is more pronounced. Different power system operating conditions, STATCOM/SVC control system settings and fault scenarios are considered in the simulations. The STATCOM/SVC effects on the distance relay tripping characteristics are also analyzed. © 2011 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.