120 likes | 233 Views
Cigré 2005, SC B5 Colloquium in Calgary Preferential Subject 1 Question 8. Zoran Gaji ć ABB Sweden. SC B5: PS1, Q8; Multifunctional Transformer Relays. COMPLEXITY ISSUES. Relay Complexity. Old Technology versus New Possibilities. Old versus New.
E N D
Cigré 2005, SC B5 Colloquium in Calgary Preferential Subject 1 Question 8 Zoran GajićABBSweden
SC B5: PS1, Q8; Multifunctional Transformer Relays COMPLEXITY ISSUES Relay Complexity
SC B5: PS1, Q8; Multifunctional Transformer Relays ADAPTIVE TECHNIQUE Adaptive Relays, Use or not use new features
Adaptive Relays – OLTC Position Reading • On-line OLTC position monitoring available since 1998 • Via BCD or mA signal • Hundreds of installations • Excellent performance record • Improved Trafo Diff and Voltage Control functionality
Adaptive Relays - Transformer Differential • Adaptive inrush restraint • Adaptive bias calculation for 1½ CB stations • Available since 1998 • Thousands of installations • Excellent performance record • Improved Trafo Diff operation • Paper in WPRC 2003
New Feature –> Turn-to-Turn Fault Protection • Detects all turn-to-turn faults with more than 1% of shorted turns • Excellent add-on to the traditional differential protection