1. 1 SIMONE as a key support for operating transmission system of Plinacro Authors: Josip Jovanovac, Plinacro d.o.o. Martin Styblo, SIMONE Research Group s.r.o.

2. 2 VODNJAN UMAG KUKULJANOVO OMIŠALJ BOSILJEVO SPLIT PLOČE ZABOK LUČKO D. MIHOLJAC ROGATEC B. BROD NOVA KAPELA POŽEGA BJELOVAR KUTINA GOSPIĆ ZADAR JOSIPDOL KARLOVAC KNIN ZAGREB S. BROD PULA BELIŠĆE OSIJEK Slovenia Bosnia and Hercegovina Hungary Italy Montenegro Serbia UGS Okoli VARAŽDIN Existing transmission system - 2085 km of pipelines -18 supply points -1 border interconection -151 offtake stations -1 underground gas storage - no compressors

3. 3 VODNJAN UMAG KUKULJANOVO OMIŠALJ BOSILJEVO SPLIT PLOČE ZABOK LUČKO D. MIHOLJAC DRAVASZERDAHELY ROGATEC B. BROD NOVA KAPELA POŽEGA BJELOVAR KUTINA GOSPIĆ ZADAR JOSIPDOL KARLOVAC BENKOVAC KNIN ZAGREB S. BROD PULA BELIŠĆE OSIJEK Slovenia Bosnia and Hercegovina Hungary Italy Montenegro Serbia UGS Okoli VARAŽDIN Existing transmission system + possible future extensions - 1000 km of new pipelines - new border interconnections - transit - new UGS - compressor stations

4. 4 - microwave link PDH ring - radio links to RTU-s - fiber-optic network Communication system Supervision and Control System National Dispatching Center

5. 5 Communication system Supervision and Control System National Dispatching Center

6. 6 Built during 2006. as integrated turn key project - real-time supervision of major entry and exit points 98% of entry and 90% of exit flow - remote flowrate/pressure control on important network nodes - SIMONE real time model + leak detection support for decision in real-time balancing activities Supervision and Control System National Dispatching Center

7. 7 Plinacro – Transmission System Operator NOW Technical conditions for operating transmission system stable flat flow rates on supply points 40% of transmission for households consumption - seasonal character no established full transmission nomination regime UGS flow rate set by TSO, based on actual state and partially known plans Bussines enviroment for operating transmission system Plinacro - unbundled TSO, 100% state owned basic legal framework for opening gas market exist lower legal acts in preparation (market rules, network codes etc.) one shipper - one transmission contract no compettion for transmisson capacity acces

8. 8 Plinacro – Transmission System Operator IN NEAR FUTURE transmission system extension – new border interconnections - transit real gas market opening - new market players – new shippers nondiscriminatory and transparent TPA nomination, allocation, balancing - required IT support New IT infrastructure telereading system - all exit points daily metered and fiscal data acquired via GPRS Gas Transmission Management System − contract management (interconnection, capacity booking) − transmission nomination process − allocation, balancing, reporting − upgrade SIMONE instalation evaluation of capacity requests and nominations automated scenario preparation and result presentation

9. 9 Focus on pipeline simulation (MS) Online system –Installed functions –Performance Offline simulations Customizations Benefits, experience, future

10. 10 SIMONE online - functions State reconstruction (PRSIM) –SCADA data –Manual entries (PRSIM_INC) –Pig tracking Leak detection and localization (LDSIM) –Detection – jump of mass correction signal for network areas –Localization – test & trial for nodes/milepost within area Look-ahead simulation (ZYSIM) –Forecasted/scheduled flows from UDW –Manual entries (ZYSIM_INC) On-request simulation –Save ZYSIM as… –Data preparation from UDW Computational features –Quality tracking, heat dynamics

11. 11 SIMONE online - performance State reconstruction (PRSIM) –Linepack always well captured – pressure readings… –Influence of manually entered offtakes Mass correction Flow distribution within loops Look-ahead simulation (ZYSIM) –Flow-flow simulation starting from last state –Smoothness of concatenation with PRSIM Mass correction in PRSIM

12. 12 SIMONE – LIVE network model

13. 13 Network balance figures

14. 14 PRSIM performance

15. 15 Leak detection & localization Feasibility study –Leak caused by hole of equivalent diameter 30 mm is detectable within area –Localization to node/milepost not 100% Test case –Filling new part of pipeline, flow measured but unknown to real-time model False alarms –Known areas – few measurements & manually entered offtakes

16. 16 Test “leak”

17. 17 First detection & localization (+6 min)

18. 18 Final size & position (~45 min)

19. 19 Offline simulations 2 offline workplaces Usage –System development –Operation planning –Capacity studies Highly transient behavior of Plinacro pipeline system –Flat supplies vs. modulated consumptions –Daily average static vs. Dynamic analysis

20. 20 Customizations - “Stars” of control valves

21. 21 Benefits, experience, future Current state Online –Supplies network balance data for operators –Brings “another” view on readings –Enables short-term what-if analysis by expert –Continuous extensions and improvements Offline –Useful for complex analysis –Input data needed Future Online –More integration for operators –Redundancy GTMS project –Capacity calculations –Nomination handling –Easy access to data “Human element” Dedicated team - user, vendor and integrator