Overview of the Greek power system. Challenges and development plan for the transmission system

Transcription

1 Overview f the Greek pwer system ΑΝΕΞΑΡΤΗΤΟΣ ΔΙΑΧΕΙΡΙΣΤΗΣ ΜΕΤΑΦΟΡΑΣ ΗΛΕΚΤΡΙΚΗΣ ΕΝΕΡΓΕΙΑΣ ΔΙΕΥΘΥΝΣΗ ΣΧΕΔΙΑΣΜΟΥ ΑΝΑΠΤΥΞΗΣ ΣΥΣΤΗΜΑΤΟΣ Challenges and develpment plan fr the transmissin system Presentatin fr First SEERC Cnference D. MICHOS IPTO GREEK NC CIGRE

2 Basic Inf fr the Greek pwer system Area: km 2 Ppulatin: (2012) Number f electricity cnsumers: (2013) TSO: IPTO DSO: HEDNO Peak lad: MW (2007) Average interruptin f electricity: 21.4 min 2

3 EVOLUTION OF THE ELECTRICITY CONSUMPTION The ecnmic recessin resulted in a cnsiderable reductin f electricity cnsumptin: ~10% reductin in annual energy cnsumptin cmpared t the maximum annual energy cnsumptin (recrded in 2008) This lad reductin reflects similar reductin in IPTO frecasts fr cnsumptin in next decade cmpared t lder frecasts Accrding t the frecasts f IPTO, cnsumptin will reach 2008 levels (histrical maximum) after the end f the current decade The increase in distributed generatin (mainly slar) resulted in a reductin f peak pwer demand and pwer transfer needs (~9% cntributin in 2015) 3

4 EVOLUTION OF THE TOTAL NET ELECTRICITY DEMAND Remark: Pumping is nt included 4

5 (TWh) IMPACT OF DISPERSED RES GENERATION ON ELECTRICITY DEMAND Impact f dispersed RES generatin n Demand Ttal demand System demand

6 (MW) IMPACT OF DISPERSED RES GENERATION ON ANNUAL PEAK LOADS Impact f dispersed RES generatin n Annual Peak Lads Ttal peak System peak

7 FORECAST OF ANNUAL PEAK LOADS (summer nn, withut taking int accunt the dispersed generatin) Scenari Lw Reference High Year (MW)

8 FORECAST OF EVENING WINTER PEAK LOADS Scenari Lw Reference High Year (MW)

9 Hellenic DSO Data 9

10 MAIN DRIVERS FOR THE HELLENIC TRANSMISSION SYSTEM DEVELOPMENT Besides the needs fr demand supply, the main drivers fr the develpment f the Hellenic Electricity Transmissin System are: Intercnnectin f Greek islands (security f supply, reductin f the energy cst, envirnmental issues) Cnnectin f cnventinal (thermal) generatin Cnnectin f RES generatin Majr prblem: Reactin f the public and delays in the permitting prcess. The prgress twards the Natinal and Eurpean targets fr an increased RES penetratin (40% in the electricity sectr) is already nticeable 10

11 EXISTING THERMAL POWER STATIONS (till ) Technlgy Installed capacity (ΜW) Lignite 4462 Oil 730 Natural Gas (cmbined cycle) 3999,8 Natural Gas (pen cycle) 308,5 Dispatched CHP plants 334 TOTAL 9834,3 11

12 SCHEDULED CONVENTIONAL POWER STATIONS (with valid cnnectin ffers) Technlgy Installed capacity (ΜW) Lignite 660 Natural Gas (cmbined cycle) 811 Hydr (strage) 242 Hydr (pump strage) 590 TOTAL

13 SCHEDULED INSTALLED CAPACITY OF RES POWER STATIONS AND CURRENT SITUATION Technlgy Target 2014 (ΜW) Target 2020 (MW) Installed RES capacity till (ΜW) RES capacity with Binding Cnnectin Offers (ΜW) Hydrs (Cnventinal & Small) = =858 Phtvltaics Slar thermal Wind farms Bimass / Bigas Additinal 100 MW f High Efficiency CHP in peratin 13

14 ENERGY (MWh) CAPACITY (MW) ELECTRICAL ENERGY PRODUCTION FROM RES & HIGH EFFICIENCY CHP POWER PLANTS RES GENERATION YEAR WF Sm.Hydr B.M/G hechp PV PV Rf CAPACITY 14

15 CAPACITY (MW) INSTALLED CAPACITY OF RES AND LARGE HYDROS INSTALLED CAPACITY OF RES AND LARGE HYDRO 8000, , , , , , , ,000 0, YEAR WF Sm.Hydr BIOM./G hechp PV PV Rftp large HYDRO 15

16 TWh CONTRIBUTION OF DIFFERENT FUELS AND IMPORT-EXPORT BALANCE 60 IMP-EXP LARGE HYDROS 50 RES & CHP OIL 40 N.GAS LIGNITE

17 CONTRIBUTION OF DIFFERENT FUELS AND IMPORT-EXPORT BALANCE Greece: Electricity prductin - demand (GWh) Imprts RES Gas Lignite P/V Hydr Oil

18 CONTRIBUTION OF RES TO THE TOTAL DEMAND SUPPLY 30,0% TOT RES 25,0% RES % 20,0% 15,0% 10,0% 5,0% 0,0%

19 THE MOST IMPORTANT TRANSMISSION PROJECTS FOR THE PERIOD Intercnnectin f Cyclades t the Mainland System Phase A under cnstructin (estimated cmmissining: 2017) Phase B: 2018 Phase C: 2022 New 400 kv verhead line Lagadas Filippi Under cnstructin (estimated cmmissining: 2017) Develpment f the 400 kv in the Pelpnnese peninsula Crridr Megalpli-Patra-Achels: Under cnstructin (2018) Crridr Megalpli-Krinths-Kumundurs: 2021 Intercnnectin f Crete t the Mainland System Phase I (AC 2x200 MVA frm Pelpnnese): 2020 Phase II (DC 2x350 MW frm Attica):2024 (50% capacity till 2022) 2 nd BG-GR tie-line N.Santa (GR)-Maritsa (BG) (PCI, 2021) New EHV S/S Ruf (2024) 19

20 INTERCONNECTION OF CYCLADES TO THE MAINLAND SYSTEM (Phase A ) AC 200MVA 108km 23km 15km AC 200MVA 33km Existing grid 150kV Existing grid 66kV 150kV AC S/C 200MVA 150kV AC S/C 140MVA 18km AC 140MVA 35km AC 140MVA 46km 20

21 INTERCONNECTION OF CYCLADES TO THE MAINLAND SYSTEM (Phase B ) 15km Existing grid 150kV 23km Existing grid 66kV AC 200MVA 108km upgrade 15km AC 200MVA 33km 4km 150kV AC S/C 200MVA 150kV AC S/C 140MVA 11km 18km AC 140MVA 46km AC 140MVA 35km AC 140MVA 40km AC 140MVA 7.6km 21

22 INTERCONNECTION OF CYCLADES TO THE MAINLAND SYSTEM (Phase C ) AC 2 200MVA 108km 15km 23km 15km Existing grid 150kV Existing grid 66kV 150kV AC S/C 200MVA 150kV AC S/C 140MVA AC 200MVA 33km 18km 11km AC 140MVA 46km AC 140MVA 35km AC 140MVA 40km AC 140MVA 7.6km 22

23 INTERCONNECTION OF CRETE TO THE MAINLAND TRANSMISSION SYSTEM (crucial parameters) Annual energy cnsumptin ~3ΤWh (~6% f the ttal Natinal cnsumptin) An annual surcharge f ver 300Μ distributed t all cnsumers Lcal il pwer plants f high peratin cst, cnsisting f ld pwer units, with lw efficiency, lw availability and significant envirnmental impact Great difficulties in land purchase fr the enhancement f the existing lcal generatin r the develpment f new plants Cntinuus increasing interest fr the explitatin f the significant RES ptential in Crete RES penetratin is limited due t significant stability issues likely appear in an islated pwer system like that f Crete 23

24 INTERCONNECTION OF CRETE TO THE MAINLAND TRANSMISSION SYSTEM (Current challenges) Necessary adaptatin t new cnditins: Directive 2010/75/EC n industrial emissins Directive 2015/2193/EC n the limitatin f emissins f certain pllutants int the air frm medium cmbustin plants In the cming years Crete pwer system will prbably face significant and increasing pwer adequacy issues (taking int accunt the age f the majrity f the existing pwer units) The intercnnectin f Crete becmes «urgent», indicating the implementatin time schedule as the mst critical parameter fr the selectin f the apprpriate technical slutin fr the intercnnectin 24

25 BENEFITS FROM THE INTERCONNECTION OF CRETE TO THE MAINLAND TRANSMISSION SYSTEM Increase f the security f supply n the island Significant savings f fuel csts, with direct effect t the Public Service Obligatin, which surcharges all natinal cnsumers Significant savings f high investment csts fr the develpment and cnversin f lcal pwer plants Better explitatin f the high RES ptential (ntably the very high wind ptential), which is currently very limited due t stability issues in small size autnmus systems Drastic reductin f the envirnmental impact caused by the cntinuus peratin f the lcal pwer statins, many f which are lcated in residential areas Cntributin t the reductin (and in lng term the eliminatin) f CO 2 pllutants and assciated csts Allws the expansin f the "Energy Market" t the intercnnected islands 25

26 LAYOUT OF CRETE INTERCONNECTION TO THE MAINLAND POWER SYSTEM 26

27 PHASE I: AC 150kV 2 200MVA INTERCONNECTION CRETE - PELOPONNESE Cmmissining date The estimated cmmissining date (withut significant legal r ther cmplicatins) is by the beginning f 2020 achieve the target f the mst pssible fast implementatin Technical assessment: Analysis f steady-state (N and N-1) and dynamic peratin in abnrmal cnditins, fr varius lad and RES scenaris The cmpletin f Phase I prvides a transmissin capacity f MW frm HETS t the System f Crete Security f supply level in Crete pwer system will be significantly high cmpared t the current cnditins: The respnse t abnrmal cnditins related t lss f generatin is achieved withut any need fr lad shedding Drastic reductin f the necessary spinning reserve (f extremely high cst) Transmissin lsses Mlai Chania: ~ GWh/year 27

28 PHASE I: AC 150kV 2 200MVA INTERCONNECTION CRETE - PELOPONNESE Cntributin t saving f Public Service Obligatin The cntributin f the intercnnectin t the supply f lads in Crete is estimated t ~ GWh/year (40% 60% f the ttal demand in the island) Significant reductin f the peratin cst Significant savings f high investment csts fr the develpment f new pwer plants Enhancement and expansin f 150 kv transmissin system in Laknia The necessary prjects fr the decngestin in the area and fr the imprvement f the security f supply (new 150 kv S/S in Neapli and a new 150 kv transmissin line fr its cnnectin t the System), can be cmbined with the prjects f Phase I f the intercnnectin f Crete, leading t the simultaneus achievement f multiple targets 28

29 PHASE I: AC 150kV 2 200MVA INTERCONNECTION CRETE - PELOPONNESE Decngestin f Pelpnnese until the cmpletin f 400kV prjects Cntributin f the absrptin f the pwer generated by the new NG cmbined cycle unit «Megalpli V» Pwer flw First years f peratin: Flw directin Pelpnnese Crete High RES develpment: Significant restrictins in exprt capacity in the directin Crete Pelpnnese (nt eliminated after the cmpletin f 400 kv prjects in Pelpnnese) need fr Phase II Cnclusin Cst: ~ 330 Μ, with extremely shrt depreciatin time The current issues in Crete (limited reliability and high prductin cst) are vercme in a great extend Safe cst estimatin, aviding significant technical/envirnmental issues cmpared t a DC slutin 29

30 PHASE II: DC 2 350MVA INTERCONNECTION CRETE - ATTIKI Cmmissining date Extended requirements fr investigatins twards the determinatin f the ptimum path due t bjective difficulties related t the gelgical cnditins alng the cable laying rute path Envirnmental issues Prbable needs fr the develpment f special technlgies (Research & Develpment) The estimated cmmissining date (withut significant legal r ther cmplicatins) is by the end f 2024 Cst High, with wide range f pssible values Current estimatin: ~ Μ 30

31 PHASE II: DC 2 350MVA INTERCONNECTION CRETE - ATTIKI Implementatin in tw steps: Laying f tw cables and peratin with half capacity f the DC link (350 MW) till 2022 Temprary vercme f the land purchase and granting permissins fr the installatin f grunding electrde in a lake (lagn) Operatin in the full capacity f the link (700 MW) till 2024 Cmpletin f the cnstructin f the lagn and the installatin f the grunding electrde Additinal laying f a medium-vltage cable r 31

32 HEDNO prjects fr Intelligent Systems HEDNO s strategic prjects fr the Netwrk mdernizatin and the transitin t the new era f "Intelligent Systems": HEDNO is currently under technical evaluatin f the ffers fr a telemetering system testing smart meters in a pilt prject. The meters will be installed in cmmercial and residential areas, bth inland and n islands in rder t test the meters in different situatins. In additin t this pilt, HEDNO will als spend 5 millin eurs t set up 27 micrgrids n islands and 7,6 millin eurs t set up energy and lcal cntrl centers fr CRETE and RHODES. T that end remte cntrl devices and smart meters are currently being tendered. 32

33 Other HEDNO Prjects fr mdernizatin f Distributin HEDNO s current Business Plan includes investments amunting t 1.25 bln eur within a 5-year perid and 12 Strategic Prjects that will cnstitute the primary "vehicle" t drive materializatin f the strategic gals. Amng these prjects are the fllwing: Five new state-f-the art Distributin Cntrl Centers Rll ut f Smart metering at a Natinal level. Island Energy Cntrl Centers prviding new management tls and applicatins 33

34 Thank yu fr yur attentin 34