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3 luglio 2006

FORUM. 3 luglio 2006. Qualità della tensione nelle reti elettriche in Italia: il sistema italiano di monitoraggio delle reti MT PROSPETTIVE DI RICERCA SULLA QUALITA’ DELLA TENSIONE C.A. Nucci CIGRE ST C4. Dove. Autorità per l’energia elettrica e il gas. Auditorium CESI

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3 luglio 2006

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  1. FORUM 3 luglio 2006 Qualità della tensione nelle reti elettriche in Italia: il sistema italiano di monitoraggio delle reti MT PROSPETTIVE DI RICERCA SULLA QUALITA’ DELLA TENSIONE C.A. Nucci CIGRE ST C4 Dove Autorità per l’energia elettrica e il gas Auditorium CESI via Rubattino 54 - Milano

  2. Update on Activities of CIGRE C4 (System Technical Performance) Power Quality Working Groups Si ringrazia Robert Koch Convener Advisory Group AG C4.1. AG C4.1. Power Quality

  3. Cigré AG C4.1. Scope Continuity of supply and voltage quality (magnitude, waveform, frequency, symmetry). • measurement and simulation methods • identification of quality indices and • study of acceptable/achievable limits / performance objectives • monitoring techniques • emission from disturbing installations, • immunity of sensitive installations, • mitigation techniques • economic aspects AG C4.1. Power Quality

  4. Existing and New WG’s/TF’s(as at April 2005 SC 4 Meeting) Active Completed Scope & proposed convener reviewed and approved by Study Committee C4 Scope under preparation AG C4.1. Power Quality

  5. Recently Completed WG’s/TF’s • JWG C4.1.04: Power Quality Indices and Objectives • Key deliverable: TB 261 & Electra paper published in October 2004 • Review existing indices and objectives. • Review of international measurement data. • Recommendations for quality indices. • Recommendations for quality objectives. • WG disbanded Aug 2004 AG C4.1. Power Quality

  6. Existing WG’s/TF’s • JWG C4.1.01: Power Quality General Aspects • Key deliverable (2005): Flickermeter test protocol (Electra paper) • Decision to terminate in 2006 due to TC limit of 3 years • Proposed scanning function to be continued as TG under AG C4.1 • TF C4.1.02: Voltage Dip Evaluation and Prediction Tools • Key deliverable (2006): Cigré broshure: simulation & analysis methods • Draft completed, extensive background provided • JWG C4.1.03: Emission Limits for Disturbing Loads • Key deliverables (2005/6): Reports to IEC 77A/WG8, Electra paper • Draft 10 of IEC 61000-3-6 revision (harmonics) completed, provided to IEC • Drafts 2 IEC 61000-3-7 revision (flicker), new doc on unbalance completed • Work on emission limits from LV installations started • Review of WG progress on CIRED Apha 2 session (Mark McGranaghan) AG C4.1. Power Quality

  7. New WG’s/TF’s • JWG C4.1.05: Technical Performance Benchmarking Guidelines • Transmission & Sub-transmission systems • Practical application of TB261 recommendations • Internal indices (e.g. availability / line fault rates) • Peer group selection • Guidelines not actual benchmarking • JWG C4.1.06: PQ Instrument Test Protocols • Test protocol for IEC 61000-4-30 instrument (mainly Class A) • Practical application • JWG C4.1.07: Economic Framework for Voltage Quality • Voltage quality (including dips & short interruptions) • Methodology • Indicative costs were possible AG C4.1. Power Quality

  8. New WG’s/TF’s • TF C4.1.08: Review Of Flicker Objectives - HV,MV&LV Systems • Review international measurements • Review propagation of flicker • Recommendation of revised objectives • JTF C4.1.09: Emission Assessment Techniques • Review practical application of CCU2 guidelines published a few yrs ago • Introduction of guidelines for unbalance emission assessment • WG C4.1.10: Dip Immunity of Equipment - Customer Installations • Classes of dip performance for various equipment types • Based on data collected on test conducted around the world • Specification guidelines AG C4.1. Power Quality

  9. Anche in ambito CIGRE temporalifulmini ma anche • vento • rami spezzati • …

  10. Pearson VD-305A: • 300 kV peak • nominal ratio 10 kV / 1 V • bandwidth 30 Hz ÷ 4 MHz (-3 dB) • rising time 100 ns • accuracy ±1% Meinberg GPS 168-PCI: • accuracy of ±250 ns NI DAQ 5112 digitizer: • 12-bit • sampling frequency of 100 MS/s • accuracy of ±1% • storage capability of 16 MB Progetto FULCOR Obiettivo: correlare eventi atmosferici rilevati dal CESI-SIRF a guasti o disturbi all’interno di sistemi elettrici di distribuzione tramite l’utilizzo di sistemi distribuiti di misura e accurati codici di calcolo (LIOV-EMTP).

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