Impact of Renewable generation

Transcription

1 Impact of Renewable generation Workshop Greenpeace - Terna "Power30" ROME, October15 th 2014

2 Index - Innovative Solutions Implemented - Main changes in the last years From liberalization to nowadays Investments in generation Demand and Renewable trends Curtailments of wind and solar plants - Grid development in South Italy - New challenges 2

3 Mainchangesin the last years From liberalization to nowadays to Centralized planning of the system Generation and Grid Development and Operation Lack of generation in respect of Demand Big import from abroad National generation mainly from Thermal power plants, powered oil Stable growth of the Demand Liberalization of generation Investments in generation New Thermo power plants (most in CCGT technology): MW Renewable: wind and solar power plants MW Demand crisis After the 2008 financial crisis Transmission Grid became the key factor for new generation utilization 3

4 Mainchangesin the last years Investments in generation Electricity Market boosts investments in generation Growth of conventional generation from 2002: MW most in Combined Cycle Gas Turbine Renewable big growth from 2005 Wind MW Solar (Photovoltaic) MW Investment mainly in the South, far from big consumers Overcoming from initial generation undercapacity to satisfy the Demand to present overcapacity In 2013 the peak demand has been satisfied with a reserve margin up to 46% 85 Installata Disponibile 10% from Under to Over capacity % GW Thermo from 2002 Renewable big growth from 2005 to 1Q 2014 Peak Demand Reserve Reserve Margin 4, MW (circa 38% al Nord) (circa 43% al Sud ) Energy flows mainly from the South Energy flows from liberalization to nowadays

5 Mainchangesin the last years Demand and Renewable trends Demand crisis In 2013: back to 10yrs ago Back to 2003 level % (1) Demand crisis and Renewable growth make system operation more complex More flexible dispatching resources are needed Less regulation resources are available MWh Demand not satisfied by Renewable Renewable big growth In 2013: Demand significantly satisfied by Renewable: 12,1% from Wind and Photovoltaic HIGH RAMP Wind Photovoltaic 12,1 % Demand OFF-PEAK 10,0 7,0 6,1 5,6 3,3 2,2 3,2 0,2 0,6 4,4 5,1 2,0 2,7 2, Source: Terna. data on operation of the Italian power system h Evening issue: peak Demand and reduction of PV generation 5

6 MainChangesin the last years Curtailments and demand satisfied by RES (wind and solar) GWh RES energy and curtailment RES Curtailment 9.7% 4.8% 1.3% 0.5% 0.4% Peak values of Demand satisfied by RES production hourly and daily in South Italy and Sicilia Max giorno Max ora 138% 126% 88% 44% 26% 56% 37% 59% 89% 81%

7 IMPACT OF RENEWABLE GENERATION ROME, October 15th 2014 Innovative Solutions Implemented Management of energy flow Active power: Phase shifter transformer (PST) Reactive power: Reactors/Capacitors, synchronous compensators Storage devices New Lines Transfer Capacity Optimization of existing overhead lines Dynamic Rating Smart Grid Solutions Prediction of RES generation Wide Area Monitoring Systems (WAMS) Automatic tripping devices and realtime configuration changes 7

8 Innovative Solutions Implemented PST CAPACITOR REACTOR STUDY FOR NEW PST ON CROSS BORDER SECTION SYNC.COMPENSATOR STORAGE SYSTEMS STUDY FOR NEW PST ON CROSS BORDER SECTION 8

9 Grid development in South Italy New linesand RES connections km of new lines 70 new substations ~ 5 Mld investments Upgrade existing overhead lines km of lines on 150 kv grid ~ 1 Mld investments Dynamic Thermal Rating First application on 100 km of 150 kv lines in South Italy with an increase of transmission capacity of about 250 MW Applications on EHV voltage level grid in progress 9

10 New Challenges Coordination TSO-DSOs In order to have as much information as possible concerning MV and LV generation and to improve systems coordination Advanced Dispatching of RES Estimation/forecast at short time of the renewable generation and assessment in real time of RES by Advance Dispatching in order to guarantee the security EU Market Integration in Real Time European market integration (both Energy and Dispatching Markets), in order to: cope opportunities in exchange of efficient energy between Markets share dispatching resources, with improvement of security and efficiency Opportunities for producers to sell resources also abroad Dispatching and Energy Operation 10

11 Back-Up 11

12 Demand supplied by RES Peak of renewable production (Wind and Photovoltaic) Considering data up to 2014, June 30th MW Wednesday 14/05/2014 h 12 Monday 28/04/2014 h12 Nord (*) 2524 CSud 3462 Tuesday 14/05/2013 h12 CNord 4701 (*) Monday 24/06/2013 h13 Sardegna Sunday 07/04/2013 h Sud Demand Renewable prod Sicilia 2009 Thursday 14/03/2013 h10 (*) considering the Wind reduction applied in real time 12

13 Future challenges Terna s experience in Storage Total Capacity:75 MW 2 different Project Lines serving different scope Power Intensive Line Scope: Safe management of the grid Total Capacity: 40 MW 1 Technology: Lithium, Zebra, Others Number of Projects: 2 Localization: Main Islands Energy Intensive Line Scope: Solve Grid congestion / bottlenecks Total Capacity: 35 MW Technology: NaS Sodium Sulfur Number of Projects: 3 Localization: Southern Italy Phase1: Storage Lab Central: Done Building Permit: Done Modules: Completed System: Under way Site Preparation: on going Project Evolution Authorization Procurement Construction Central: Done Building Permit: In Progress Modules: Completed System: Completed Site Preparation: on going (2 Projects ) 1. Of which 16MW in Phase 1, so called Storage Lab 13

14 Impact of RES generation on the Energy Market Total Benefits in the day ahead energy market Investments have been gradually increased from 616 M to M * Minimum Price (68) Minimum Price (69) Minimum Price (57) Minimum Price (44) Pool Price Pool Price Pool Price Pool Price /MWh 72 /MWh 63 /MWh 50 /MWh 72 Price Zone > Pool Price Price Zone < Pool Price (*) period: January-May Congestions have been gradually reduced, whilst price differential among zones has been significantly reduced 14

15 Impact of RES generation on the Energy Market Hours reduction of CCGT* power plants in operation Equivalent hours of Natural Gas Power Plants in operation (hh) % * The power plants considered are CCGT and Dual fuel qualified and not to Ancillary Service Market 15

16 Impact of RES generation on the Ancillary Services Market 16