Title :
A fault protection scheme for unified power quality conditioners
Author :
Chae, Beom-Seok ; Lee, Woo-Cheol ; Lee, Taeck-Kie ; Hyun, Dong-seok
Author_Institution :
Dept. of Electr. Eng., Hanyang Univ., Seoul, South Korea
Abstract :
A protection scheme for a unified power quality conditioner (UPQC) is presented and analyzed in this paper. The proposed UPQC has the series active power filter operated as a high impedance "k(Ω)" to the fundamentals when short-circuit faults occur in the power distribution system, and three control strategies are proposed in this paper. The first is the method for detecting the fundamental source current through the p-q theory, the second is the method for detecting the fundamental component of load current in synchronous reference frame (SRF) and the third is the method for detecting the input voltage. When the short-circuit fault occurs in the power distribution system, the proposed scheme protects the UPQC without additional protection circuits. The validity of proposed protection scheme is investigated through experimental results for the prototype UPQC systems.
Keywords :
active filters; compensation; power distribution faults; power distribution protection; power harmonic filters; power supply quality; short-circuit currents; active power filter; control strategies; fault protection scheme; fundamental source current detection; harmonics compensation; high impedance; hybrid active power filter; load current; p-q theory; power distribution system; short-circuit fault; short-circuit faults; synchronous reference frame; unified power quality conditioners; Active filters; Circuit faults; Control systems; Power distribution; Power harmonic filters; Power quality; Power system harmonics; Power system protection; Pulse width modulation inverters; Voltage control;
Conference_Titel :
Power Electronics and Drive Systems, 2001. Proceedings., 2001 4th IEEE International Conference on
Print_ISBN :
0-7803-7233-6
DOI :
10.1109/PEDS.2001.975286
