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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.

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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

UGSOkoli

VARAŽDIN

Existing transmission system

- 2085 km of pipelines

-18 supply points

-1 border interconection

-151 offtake stations

-1 underground gas storage

- no compressors

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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

UGSOkoli

VARAŽDIN

Existing transmission system + possible future extensions

- 1000 km of new pipelines

- new border interconnections - transit

- new UGS

- compressor stations

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- microwave link PDH ring

- radio links to RTU-s

- fiber-optic network

Communication system

Supervision and Control System National Dispatching Center

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Communication system

Supervision and Control System National Dispatching Center

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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 detectionsupport for decision in real-time balancing activities

Supervision and Control System National Dispatching Center

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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

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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

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Focus on pipeline simulation (MS)

• Online system– Installed functions– Performance

• Offline simulations

• Customizations

• Benefits, experience, future

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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

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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

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SIMONE – LIVE network model

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Network balance figures

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PRSIM performanceDistribution of pressure differences

SCADA measurements vs. SIMONE online

0%

20%

40%

60%

80%

100%

0 0.5 1 1.5 2

Max24 h |P-PM| [bar]

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lati

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.

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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

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Test “leak”

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First detection & localization (+6 min)

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Final size & position (~45 min)

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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

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Customizations - “Stars” of control valves

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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