BELECTRIC: Enhanced Frequency Control Capability

Transcription

1 BELECTRIC: Enhanced Frequency Conrol Capabiliy Tim Müller, CTO 28/03/2018 0

2 Company profile Yearly oal revenue of 550M EUR 84 MW / 95 MWh energy sorage sysems insalled or under consrucion Over 120 paens regisered since 2001 Technology leader in uiliy-scale solar power business 1

3 Agenda rojec Background? rogress and Tess Moving Forward 2

4 rojec Background Role of BELECTRIC Hardware overview Communicaion sysem

5 The role of BELECTRIC in EFCC Crossing from cenralized o disribued conrol scheme BELECTRIC realises one local conrol scheme for fas frequency response Rainbows V power plan 4

6 Rainbows solar V farm in Willersey, England lan Sysem Raing MWp-DC 2 x 3ϕ Transformer Nom. Capaciy 1600 kva each 4 x Inverer 880 kw AC SMA Sunny Cenral 800C XT 5

7 Sysem communicaion overview IEEE C (MU oral) IEC GOOSE (MMS) IEC GOOSE Modbus TC/I 6

8 rogress and Tess Forecasing Tess & Trials Key Learnings

9 Forecasing: Hold ime and curailmen reference Cloud camera forecasing MATLAB V model Cloud Camera ower availabiliy sen Forecass global horizonal irradiance daa for he nex 15 minues Findings Inconsisen and low accuracy robabilisic forecasing MATLAB V lan Model Calculaes power producion by Rainbows during a solar irradiance Findings Model accuracy: Underesimaing V Model slows communicaion Revised forecasing sysem Curailed Inverer Reference Inverer 8

10 hoovolaic sand alone ess recursor o Inverer conrol o Lookup able es o Curailmen es Open Loop Tes o Frequency even: simulaed o Frequency even: non simulaed Hardware in Loop Tes o Frequency even: simulaed o Frequency even: non simulaed 9

11 recursor es lookup able urpose Invesigae inverer behaviour Find ramp up/down raes Only inverer 1.1 paricipaed 100 kw working poin sep changes (hard curailed) Tes conduced during high and consan irradiance (~750 W/m 2 ) Daa measuremen via hasor oin Measuremen Uni (MU) ADCON Web oral: Inverer ower Inverer 1.1 Inverer 1.2 Inverer 2.1 Inverer

12 recursor es lookup able: Resuls kw/s 900 Inverer Ramp Raes Seps (kw) Ramp down rae Ramp up rae Ramp rae did change wih working poin Ramp down slower han ramp up Furher esing necessary Expec similar behavior wih differen inverers Invesigae variables impacing behavior 11

13 recursor es curailmen urpose To provide posiive power response (50%) and negaive power response (50%) during an even Hard curailmen vs sof curailmen Have Rainbows sill behave like a V plan Resuls osiive/negaive power response Minimum ±8.8 kw working poin change limi ADCON Web oral: Sof Curailmen 1000 AC ower (kw) Inverer 2.1 Inverer 1.1 Coninuous Sof Curailmen 12

14 Open loop es simulaed & real simulaed Successful real Successful 13

15 Hardware in he loop es urpose To invesigae he sysem hardware and real ime power response of he inverers during a frequency even Tes subdivison Grid Simulaor: acual resource availabliy wih simulaed frequency evens MU: acual resource availabliy wih real frequency evens 14

16 HiL es simulaed frequency even Tes rocedure Inverer 1.1 s acual resource availabiliy sen o he GE local conroller 750 ms F>hreshold Time aligned for DC Simulaed frequency even of Hz 600 ms Hardware reaced o negaive power reques sen by GE local conroller 750 ms Inverer 1.1 AC power curailed 1.2 s rovide negaive power response hrough V 3.5 s 15

17 HiL es real frequency even Tes rocedure Firs Tes eriod: No curailmen Second Tes eriod: Inverer 1.1 sof curailed o 50% Tesing on-going Evens are rare and mus coincide wih V power availabiliy 16

18 Key learnings so far V sysems can be inegraed ino he EFCC scheme V power availabiliy forecasing Communicaion raffic highly effecs communicaion rae and inverer response ime Adjusmen o daa poin able - sen and received V inverer ramp raes are asymeric Inverer power response has ±8.8 kw power response resoluion Imporance of ime synchronisaion Imporance of curailmen as under-frequency evens are more common 17

19 Moving Forward Fuure Work Hybrid sysem Schedule

20 Fuure work V sand alone Invesigae consisen ramp raes for V inverers by i.e. changing curren and volage insead of power percenage se poin Invesigae response ime accuracy and consisency Baery sand alone soluion V + Baery hybrid sysem soluion Quicker response ime wih baery suppor Greaer sysem power availabiliy 19

21 Hybrid sysem for EFCC V sand alone - frequency response Shif down working poin Baery sorage W 80% No frequency response osiive response possible Negaive response wih V osiive and negaive response 20

22 Hybrid sysem for EFCC Combined V + baery frequency response: Solar power No frequency response Baery sorage SoC 50% 21

23 Hybrid sysem for EFCC Combined V + baery frequency response: Solar power No frequency response Baery sorage SoC 50% SoC 100%: Negaive response wih V higher response capabiliy osiive response wih baery 22

24 Hybrid sysem for EFCC Combined V + baery frequency response: Solar power No frequency response Baery sorage SoC 50% SoC 100%: Negaive response wih V Day char higher response capabiliy osiive response wih baery Reducion of irradiaion: change SoC o ~50% 23

25 Hybrid sysem soluion complexiy Deciding on how resources work ogeher Example: Opimising baery ramp down suppor vs. baery posiive power availabiliy ro: faser negaive power response Con: less baery power availabiliy for posiive response 20 AC ower Reques (kw) Baery providing ramp-down suppor -140 Baery V Toal Sysem Response 24

26 Hybrid sysem soluion complexiy Example: Calculaion of V + baery power availabiliy hold ime Accouning for V forecasing Order in which he resources respond AC ower Reques 20 (kw) Baery + V ower Availabiliy Calculaion neg. pwr hold ime Baery V Toal Sysem Response change in irradiance 25

27 Moving forward Jan 18 Feb 18 Mar 18 April 18 May 18 June 18 July 18 Disseminaion even V communicaion esing V hardware esing Naional Grid repor due Baery sysem insallaion Baery commissioning rojec evaluaion Baery esing Baery + V hardware esing 26

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