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Fault Current Limiting Function of Dynamic Voltage Restorer Utilizing Signals from Existing Protective Relays
Author(s) -
Xuan Tung Nguyen,
Fujita Goro
Publication year - 2010
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.20538
Subject(s) - fault (geology) , limit (mathematics) , voltage , limiting , computer science , fault current limiter , electric power system , function (biology) , fault detection and isolation , line (geometry) , power (physics) , sensitivity (control systems) , electrical engineering , reliability engineering , engineering , electronic engineering , physics , mechanical engineering , mathematical analysis , geometry , mathematics , quantum mechanics , evolutionary biology , seismology , actuator , biology , geology
Dynamic voltage restorer (DVR) is a series custom compensator used in power distribution network; however, due to the fact that it is connected in series with the distribution line, DVR would suffer from downstream faults. To limit the flow of large fault currents and protect DVR itself as well, a fault current limiting function is proposed in the DVR control strategy. Fault current limiting function of DVR will be activated by the protection system and then DVR will start injecting a series voltage to the line in such a way as to limit fault current to an appropriate level (in accordance with required sensitivity of the protection systems). The contribution of this proposal is the use of signals from existing feeder protection system to activate the DVR. This will simplify the structure of DVR because the extra build‐in fault detection module is not required. Moreover, it will ensure proper coordination between DVR and protection systems. Copyright © 2010 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.