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CIGRE SC-B5 Colloquium 2005 Sept.14-16 Calgary Canada

CIGRE SC-B5 Colloquium 2005 Sept.14-16 Calgary Canada. PS3: Protection & Control of Series Compensated networks

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CIGRE SC-B5 Colloquium 2005 Sept.14-16 Calgary Canada

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  1. CIGRE SC-B5 Colloquium2005 Sept.14-16Calgary Canada PS3:Protection & Control of Series Compensated networks Q3:Are there any experiences of other unique series compensation distance relay applications where special adjustments to settings and/or logic are required to ensure correct protection performance? Zhao Xicai NARI-RELAYS CHINA Xczhao@nari-relays.com

  2. Main Ⅰ Pilot distance relay Pilot zero sequence directional relay Under-reach DPFC distance relay Three zones phase distance relay Three zones ground distance relay Two delayed zones of zero sequence directional over-current relay Main Ⅱ Phase-segregated current differential relay Zero sequence differential current relay Under-reach DPFC distance relay Three zones phase distance relay Three zones ground distance relay Two delayed zones of zero sequence directional over-current relay Protection for SC T/L

  3. DPFC Distance Relay • DPFC-Deviation of Power Frequency Component

  4. Distance Relay • Polarizing Voltage • Positive sequence voltage and • Memory voltage

  5. Distance Relay • Two Relays with Different Memory Decay time • Operate simultaneously-Forward fault • Operate one after another-Backward fault

  6. Distance Relay • Uplv=Protection Voltage of MOV.

  7. Zero-Sequence Directional Relay • Additional Source Impedance Introduced

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