Multiple Market Participation of Battery Storage System
Author
Leite de Araújo, Gabriel
Term
4. term
Education
Publication year
2019
Submitted on
2019-05-31
Pages
87
Abstract
Vedvarende energi fylder stadig mere i elsystemerne, og vind er den største kilde blandt de vedvarende. Alligevel har vind en begrænset markedsandel sammenlignet med konventionel produktion, fordi vindparker ikke let kan levere mange af de markedsydelser, der holder nettet stabilt og giver indtjening. Batteri-energilagringssystemer (BESS) kan derimod levere flere sådanne ydelser. Dette projekt undersøger, om en kombination af vindmøller og batteri, hvor batteriet leverer flere ydelser, kan øge vindens andel ved at forbedre fleksibilitet og lønsomhed. Jeg opstiller en hypotetisk vind-batteri-hybrid og en driftsplan for batterioperatøren, der anvender elprisprognoser, netopbygning samt optimal unit commitment (planlægning af hvilke enheder der kører hvornår) og batteristørrelse til at vurdere projektets indtjening. For at mindske usikkerheder udvikles også en model for batteriets levetid, så degraderingsomkostninger indgår, når batteriet leverer forskellige kombinationer af ydelser. Analysen viser, at driftsplanen kan indfange indtægtsstrømme fra forskellige markeder, samtidig med at usikre størrelser som priser tages i betragtning. I scenarier hvor batteriet tilbyder alle tilgængelige ydelser, ses indtægter tæt på 18 millioner dollars, men batteriet udsættes også for betydeligt slid på grund af hurtige energiskift. Samlet set gør BESS det muligt for vind at levere flere ydelser; degradering bør begrænses inden for unit commitment for at beskytte aktivet. Med fortsat forskning og markedsregler, der belønner hurtig respons, forventes en øget udbredelse af batterier, både i stor skala og i andre anvendelser.
Renewable energy is growing in power systems, and wind is the largest source among renewables. Yet wind still has a limited market share compared with conventional power because wind farms cannot easily provide many of the market services that keep the grid stable and profitable. Battery energy storage systems (BESS) can offer several such services. This thesis examines whether combining wind turbines with a battery and letting the battery deliver multiple services can raise wind power’s share in the generation mix by improving flexibility and profitability. I design a hypothetical wind-battery hybrid and an operating schedule for the battery operator that uses electricity price forecasts, grid setup, and optimal unit commitment (deciding which units run and when) and battery sizing to evaluate project profits. To reduce uncertainty, I also build a battery lifetime model so that degradation costs are included when the battery provides different service combinations. The analysis shows that the scheduling approach can capture revenue from different markets while accounting for uncertain variables such as prices. In scenarios where the battery offers all available services, revenues close to 18 million dollars are observed, but the battery also experiences high wear due to rapid energy changes. Overall, adding BESS enables wind power to provide multiple services; degradation must be controlled within the unit commitment to protect the asset. Given ongoing research and evolving market rules that reward fast response, wider battery deployment is expected, at utility scale and beyond.
[This abstract was generated with the help of AI]
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