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Journal Article Control strategies of energy storage limiting intermittent output of solar power generation: Planning and evaluation for participation in electricity market
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Authors
Sewan Heo, Jinsoo Han, Wan-Ki Park
Issue Date
2023-08
Citation
ETRI Journal, v.45, no.4, pp.636-649
ISSN
1225-6463
Publisher
한국전자통신연구원 (ETRI)
Language
English
Type
Journal Article
DOI
https://dx.doi.org/10.4218/etrij.2022-0120
Abstract
Renewable energy generation cannot be consistently predicted or controlled. Therefore, it is currently not widely used in the electricity market, which requires dependable production. In this study, reliability‐ and variance‐based controls of energy storage strategies are proposed to utilize renewable energy as a steady contributor to the electricity market. For reliability‐based control, photovoltaic (PV) generation is assumed to be registered in the power generation plan. PV generation yields a reliable output using energy storage units to compensate for PV prediction errors. We also propose a runtime state‐of‐charge management method for sustainable operations. With variance‐based controls, changes in rapid power generation are limited through ramp rate control. This study introduces new reliability and variance indices as indicators for evaluating these strategies. The reliability index quantifies the degree to which the actual generation realizes the plan, and the variance index quantifies the degree of power change. The two strategies are verified based on simulations and experiments. The reliability index improved by 3.1 times on average over 21 days at a real power plant.
KSP Keywords
Charge Management, Control strategy, Electricity markets, Generation plan, PV prediction, Photovoltaic (PV) generation, Power change, Prediction error, Ramp Rate Control, Real power, Reliable output
This work is distributed under the term of Korea Open Government License (KOGL)
(Type 4: : Type 1 + Commercial Use Prohibition+Change Prohibition)
Type 4: