The distribution energy resources impact

Transcript

1 LO STORAGE DI ELETTRICITÀ E L INTEGRAZIONE DELLE RINNOVABILI NEL SISTEMA ELETTRICO. I BATTERY INVERTERS Fiera Milano 8 maggio 2014 Il ruolo dell accumulo visto da una società di distribuzione ENEL Distribuzione The distribution energy resources impact 2

2 Distributed generation: an exponential growth Connections to Enel Distribuzione grid Connections yearly data (MW) ENEL DISTRIBUZIONE connections 25,6 GW Not RES Hydro Biogas 4% 4% Waste 5% Wind 15% 9% Solar 63% Connections cumulative data (MW) Data up to Apr Energy flow from trasmission grid HV-MV transformers with energy flow reversal 4

3 The installations made by Enel Distribuzione (ED) 5 Functions of the ESS Eurelectric view Source: Decentralized Storage: Impact on future distribution grids A Eurelectric paper 6

4 Electrical Storage Systems (ESS) in ED The ED idea Electrical Storage System + System System Integration Batteries 7 Electrical Storage Systems (ESS) in ED The installations Completed 1 MVA / 0.5 MWh in MV/LV substation (MV side); 2 MVA / 2 MWh in HV/MV substation (MV side); 2 MVA / 1 MWh in HV/MV substation (MV side); 32 kva / 32 kwh in a LV grid node; 32 kva / 32 kwh in a LV grid node. In final stage 1 MVA / 1 MWh in MV/LV substation (MV side); 2 MVA / 1 MWh in HV/MV substation (MV side). 3 MVA / 2 MWh 5,064 MVA / 3,564 MWh 8

5 Electrical Storage Systems (ESS) in ED The portfolio System Integrator Battery manifacturer Contractor Power / Energy 2 MVA / 2 MWh 2 MVA / 1 MWh 2 MVA / 1 MWh 1,064 MVA / 1,064 MWh 1 MVA / 0.5 MWh 9 Electrical Storage Systems (ESS) in ED The projects and sites G4EU Project Loccioni Samsung 1 MVA / 1 MWh LV pilots Loccioni Samsung 2 X 32 kva / 32 kwh Isernia Project Siemens Sanyo 1 MVA / 0,5 MWh POI Project NEC 2 MVA / 2 MWh SAET SAFT 2 MVA / 1 MWh ABB FAAM 2 MVA / 1 MWh 10

6 Electrical Storage Systems (ESS) in ED The experimentations 11 Electrical Storage Systems (ESS) in ED The plan In case of positive pilots Enel Distribuzione identified 44 further installations Total size: MW / > 100 MWh; Period: ; Size: 1 2 MVA / 1 2 MWh per HV/MV substation; Power applications should be confirmed from pilots. 12

7 The end-user ESSs 13 End-user ESS and the role of the DSO DSO do not provide just energy transportation The DSO is the guarantor of the power quality (limits or values within which the voltage characteristics must remain at any point of delivery) and of the quality of service. Generation + ESS can do the same, with same performances? YES, but with higher costs. So, we expect that the most parts of the end-user ESS will be grid connected and used for the self consumption enhancement. The DSO will transport less energy (nothing, in the extreme cases) to the customer with ESS, but it will remain the responsible for the power/services quality. 14

8 Self consumption enhancement The impact on the distribution network The estimation of the energy exchange profiles is becoming crucial for network operation, particularly in case of strong penetration of dispersed generation. Load forecast Generation forecast (forecast of solar irradiation, wind speed, cloud, rain, wind gusts etc.) The self consumption enhancement may complicate the generation forecast without any benefits on the reduction of the morning and evening peaks. 15