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- W1506365343 abstract "A method is presented for implementing controlled fault interruption,using high voltage, SF6 circuit breakers on three phase high voltage powernetworks. The main goal of the method is to synchronize the opening or tripcommands to each phase of a circuit breaker with respect to target currentzero times so that each phase will interrupt with a preselected arcingtime. Benefits of this approach include reduction in the electrical wearrate of the circuit breaker, in addition to providing potential to optimizeexisting interrupter technologies and facilitate new interruptiontechniques. A generic structure for controlled fault interruption algorithms isproposed, aimed at utilizing synergies with existing digital power systemprotection methods. The proposed method is based on estimating the futurebehavior of the currents in each phase, using a generic model. Theparameters of the model of the currents are obtained using least meansquares regression. Novel features of the proposed method include the useof analysis-of- variance tests to validate the model for targeting instantselection, provision of algorithm failure bypass control, identification ofmultiphase fault types and detection of the fault inception instant. Acomprehensive range of future work proposals is also provided. Simulations have been made using the proposed method for a range ofmultiphase fault cases than may occur on a three phase power network. Theresults indicate that the method is capable of discriminating betweendifferent fault cases and estimating target current zero times within ± 0.5ms, within typical protection system response times of 5 to 20 ms, evenwith large random noise distortion of the measured current signals. High power experiments have also been conducted to investigate thestability of the minimum arcing times of a high voltage, SF 6 circuitbreaker, operated at 80% of its normal opening speed, for a wide range offault current interruption duties. The results of these experiments confirmthe viability of controlled fault interruption from the perspective ofminimum arcing time stability, in addition to indicating significantpotential for circuit breaker optimization by using the controlled faultinterruption technique to restrict the required arcing time window andthereby also the required interrupter operating energy." @default.
- W1506365343 created "2016-06-24" @default.
- W1506365343 creator A5069849045 @default.
- W1506365343 date "2007-01-01" @default.
- W1506365343 modified "2023-09-24" @default.
- W1506365343 title "Three Phase Controlled Fault Interruption Using High Voltage SF6 Circuit Breakers" @default.
- W1506365343 hasPublicationYear "2007" @default.
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