Grid connected battery energy storage

Transcription

1 Grid connected battery energy storage Asset Management Energex Limited March 2016 A presentation to 2016 API Summer School

2 Energex driving energy innova9on Contents Energex ba+ery trials Grid connected ba+ery storage Case studies 2

3 Impacts of emerging technologies on the electricity industry Consumers of electrical energy becoming more involved in their energy consump9on and, in some cases, produc9on. 3

4 Uncertainty in consumer behaviour = New set of challenges Source: CSIRO 2050 Scenarios Our Connected Future 4

5 Ba?ery storage trial *enquiries can be ed to: 5

6 Ba?ery storage trial at Rocklea 6

7 More to come Small commercial BESS Large commercial BESS Demonstra9on site for public viewing (educa9onal site) Market-based trial for residen9al customers Source: Teslamotors.com * enquiries can be ed to: batetrytrials@energex.com.au 7

8 Situa9on Problem Op9ons Solu9on Electrical Energy Storage: Technology Overview and ApplicaHons The unique Australian climate & storage technologies. Ba+ery opera9ng condi9ons (charge\discharge strategy) are cri9cal. Interplay between ba+ery opera9on that benefits the customer and the network is not straighborward. Safety regula9ons/standards are significantly delaying the availability of various energy storage technologies and their poten9al deployment scenarios. Source: Cavanagh K, Ward J K, Behrens S, Bha+ A I, Ratnam E L, Oliver E and Hayward J. (2015). Electrical energy storage: technology overview and applica9ons. CSIRO, Australia. EP

9 Grid connected Ba?ery Storage Tesla Powerpack 250kW, 488kWh Tesla says Powerpack is designed to: Maximize consump9on of on-site renewable power. Avoid peak demand charges. Buy electricity when it s cheapest. Get paid by u9lity or intermediate service providers for par9cipa9ng in grid services. Back up cri9cal business opera9ons in the event of a power outage Further reading: Rachel Carnegie, Douglas Gotham, David Nderitu, Paul V.Preckel, UHlity Scale Energy Storage Systems- benefits, ApplicaHons, and technologies, State U9lity Forecas9ng Group, June

10 Possible benefits of ba?ery storage Avoid peak demand charges Peak reduc9on Maximize consumphon of self-generahon Limit intermi+ent export Backup during network outage/ be?er reliability Improved reliability Buy when electricity is cheaper Be+er asset u9lisa9on/load profile Financial benefits from providing ancillary services Efficient power quality/reliability More affordable electricity Defer/avoid network augmenta9on Enable integrahon of more renewables Avoid reverse power flow/be+er asset u9lisa9on Further reading: The Economics of Ba+ery Energy Storage, Rocky Mountain Ins9tute, September

11 Enable integrahon of more renewables Avoid reverse power flow/be+er asset u9lisa9on 11

12 Situa9on Problem Op9ons Solu9on Solar installahon in Queensland QLD Solar - Almost all solar installa9ons are owner paid systems. - Majority are roorop residen9al systems (3.5kW). - Larger customers install solar to avoid demand charges. - Ba+ery storage is not a+rac9ve to customers with feed-in tariff (44c/kWh). - Possible benefits of ba+ery are offsetng peak demand and maximising on-site consump9on. 12

13 Situa9on Problem Op9ons Solu9on Load profiles of a 11kV feeder with high penetrahon of residenhal PV Unexpected hot, humid and cloudy day (3 Feb) 4.2 in 10 Detached homes have solar PV. Typical sunny day with li+le cloud coverage (28 Jan) 13

14 Situa9on Problem Op9ons Solu9on Weather impact on a feeder with high penetrahon of residenhal solar 85 Amp 179 Amp 14

15 Situa9on Problem Op9ons Solu9on Voltage rise Reverse power flow Phase imbalance Grid voltage fluctua9ons/frequency changes Power quality (short term fluctua9ons) Protec9on/fault detec9on issues Situa9on Problem Op9ons Solu9on Do nothing! Distribu9on transformer tap setng Voltage regulator setng Network augmenta9on Load control to shir more load to day-9me Ba+ery storage Dynamic export strategy 50, , , MW peak reduc9on on 1 st Feb 15

16 Situa9on Problem Op9ons Solu9on Reverse power flow (11kV/400V distribuhon transformer) 16

17 Situa9on Problem Op9ons Solu9on Reverse power flow (11kV/400V distribuhon transformer) Load (kw) kWh Load (kw) 17

18 Situa9on Problem Op9ons Solu9on Ba?ery storage could mihgate reverse power flow (11kV/400V distribuhon transformer) Need to know: Load forecast (distribu9on transformer/ LV network) PV genera9on forecast Op9mal ba+ery charge/discharge algorithm Ba+ery alloca9on (Size and loca9on) 365kWh 18

19 Situa9on Problem Op9ons Solu9on Reverse power flow & overloaded TR (11kV/400V TRX) 854kWh 523kWh 19

20 Avoid peak demand charges Peak reduc9on Maximize consumphon of self-generahon Limit intermi+ent export 20

21 Situa9on Problem Op9ons Solu9on ConnecHng C&I solar PV to a LV feeder What s the limit? What s the impact? What s the soluhon? 224kWh PV with 89kWh Excess PV 124kWh PV with 40kWh Excess PV 21

22 Situa9on Problem Op9ons Solu9on Dynamic export/ba?ery storage Need to idenhfy: The impact on the network Available control & communica9on Efficient ba+ery opera9on Benefits to the network and the customer 22

23 Research queshons How does BESS integrate with PV? What are the impacts of tariffs and incentives on BESS uptake? What is the value proposition for Energex in having control of BESS? What are the impacts of DER on Energex network (LV and MV networks)? How can intelligent data analytics improve locating faults/voltage profile issues on LV network? 23

24 Thank you. Daniel Eghbal Strategic Planning Engineer Asset Management, Energex T : M: E : danieleghbal@energex.com.au