Determination of Single Pole Breaker Reclose Time and System Performance Using Real Time Simulation

• Main Author: Godavarthi, Venkata Sridivya
• Format: Others
• Published: ScholarWorks@UNO 2017
• Subjects: Single Pole Re-close; Series Capacitor Compensation; Hypersim; Primary Arc; Secondary Arc; MOV; IEEE standard for De-ionization time; Power and Energy
• Online Access: http://scholarworks.uno.edu/td/2299; http://scholarworks.uno.edu/cgi/viewcontent.cgi?article=3491&context=td

This thesis investigates single pole reclosing in series capacitor compensated line. An algorithm is developed to determine the optimal dead time required for single pole reclose of circuit breakers and to reduce the randomness of reclosing time. The algorithm considers conditions of system, fault, voltage zero crossing, arc, and IEEE C37.104-2012 standard de-ionization time. This study also addresses difficulties of single pole reclose operation such as over-voltages at the line, secondary arc extinguishing time, dead time, over-voltages across the series capacitor, and negative sequence current. The system performance is evaluated using a set of metrics based on those operation difficulties. Methods used in the industry such as shunt reactor with the neutral reactor, surge arrester, and MOV are modelled and simulated to capture their effect on the operation difficulties. Comparative analysis is made to rank the effectiveness of each element against difficulties in operating single pole reclosing of circuit breakers.