SIMONE as a key support for operating transmission

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. 1

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

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

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

Supervision and Control System National Dispatching Center Communication system 5

Supervision and Control System National Dispatching Center 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 6

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 7

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 8

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

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 10

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 11

SIMONE – LIVE network model 12

Network balance figures 13

PRSIM performance 14

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 15

Test “leak” 16

First detection & localization (+6 min) 17

Final size & position (~45 min) 18

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 19

Customizations - “Stars” of control valves 20

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 21