RTU protections - news Ostrava 2015 Energetics RTU protections - - PowerPoint PPT Presentation

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RTU protections - news Ostrava 2015 Energetics RTU protections - - PowerPoint PPT Presentation

www.elvac.eu Marian Kuruc RTU protections - news Ostrava 2015 Energetics RTU protections RTU RTUs for control, protection, data acquisition and communication Content Redesigned block of protections Global setting of measurement ranges


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Marian Kuruc

Ostrava 2015

RTU protections - news

www.elvac.eu

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RTU protections

Energetics

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RTU Redesigned block of protections Global setting of measurement ranges Circuit breaker configuration Open/close counter Circuit breaker open failure detection Protection group selection according to the active power flow Negative sequence evaluation for current and voltage unbalance Frequency protection df/dt – frequency change, 2 levels Directional earth fault protection – added parameter characteristic angle and active sector

www.elvac.eu | www.rtu.cz

RTUs for control, protection, data acquisition and communication

Content

Own products

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RTU

www.elvac.eu | www.rtu.cz

Global setting of measurement ranges

RTUs for control, protection, data acquisition and communication Own products

Unified editing of ranges for AI, protections, fault records

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RTU

www.elvac.eu | www.rtu.cz

Circuit breaker configuration

RTUs for control, protection, data acquisition and communication Own products

Circuit breaker open failure detection If circuit breaker status change fails (t > Max. time of line shutting down) RTU will automatically send signal VDI369 to SCADA Circuit breaker open/close counter Counter value is saved in NVRAM Can be set/cleared from SCADA

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RTU

www.elvac.eu | www.rtu.cz

Protection group selection according to the active power flow

RTUs for control, protection, data acquisition and communication Own products

Automatically changes protection group according to sign of active power P and configured delay

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RTU

www.elvac.eu | www.rtu.cz

Negative sequence evaluation for current and voltage unbalance

RTUs for control, protection, data acquisition and communication Own products

Unbalance limit is given as the ratio of negative sequence component to positive sequence, expressed in percentage

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RTU

www.elvac.eu | www.rtu.cz

Frequency protection df/dt

RTUs for control, protection, data acquisition and communication Own products

Two stages df/dt, where dt = 100ms and df > „Frequency limit“ Protection is tripping when df/dt takes longer than parameter „min. duration of threshold break“

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RTU

www.elvac.eu | www.rtu.cz

Directional earth fault protection

RTUs for control, protection, data acquisition and communication Own products

Characteristic angle (0°÷180°), active section (0°÷90°), directionality Wattmetric functionality Up to 8 earth fault protections Used for different neutral point arrangements (isolated, resistance earthed, compensated)

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O Společnosti

Thank you for your attention

www.elvac.eu

Hasičská 53, 700 30 Ostrava - Hrabůvka Czech Republic Tel.: +420 597 407 100 E-mail: sales@elvac.eu www.elvac.eu, www.rtu.cz