<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>With the massive expansion of decentralised renewable energy in electricity grid networks, the power supply system has been changed from centralised to decentralised one and from directional to bi-directional one. However, due to the regional energy structure difference in the power imbalance between electricity generation and consumption is becoming more and more serious. A grid-scale energy storage system (ESS) can be one solution to balance the local difference. In this paper, two charging/discharging strategies for the grid-scale ESS were proposed to decide when and with how much power to charge/discharge the ESS. In order to realise the two strategies, this paper focuses on the application of fuzzy logic control system. The proposed strategies aim to reduce the peak power generation, consumption and the grid fluctuation. In particular, this paper analysis the ratio between energy-capacity and rated power of ESS. The performance of the proposed strategies is evaluated from two aspects, the normalised power of ESS itself and the influence on the power grid. Simulation studies were carried out on the rule-based control systems with different energy-to-power (e2p) ratios, and the results show that the proposed charging strategy with combination of extreme situation of power imbalance and the rest capacity of ESS provides a smooth load curve for the regional power grid system while the external power exchange is reduced effectively.</p>
</abstract>

With the massive expansion of decentralised renewable energy in electricity grid networks, the power supply system has been changed from centralised to decentralised one and from directional to bi-directional one. However, due to the regional energy structure difference in the power imbalance between electricity generation and consumption is becoming more and more serious. A grid-scale energy storage system (ESS) can be one solution to balance the local difference. In this paper, two charging/discharging strategies for the grid-scale ESS were proposed to decide when and with how much power to charge/discharge the ESS. In order to realise the two strategies, this paper focuses on the application of fuzzy logic control system. The proposed strategies aim to reduce the peak power generation, consumption and the grid fluctuation. In particular, this paper analysis the ratio between energy-capacity and rated power of ESS. The performance of the proposed strategies is evaluated from two aspects, the normalised power of ESS itself and the influence on the power grid. Simulation studies were carried out on the rule-based control systems with different energy-to-power (e2p) ratios, and the results show that the proposed charging strategy with combination of extreme situation of power imbalance and the rest capacity of ESS provides a smooth load curve for the regional power grid system while the external power exchange is reduced effectively.

Charging and Discharging Strategies for Clustered Regional Energy Storage System

Brandenburg University of Technology Cottbus-Senftenberg

Department of Energy Distribution and High Voltage Engineering

Wrocław University of Science and Technology

Department of Electrical Engineering Fundamentals

Power Electronics and Drives

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

{"article-title":"Charging and Discharging Strategies for Clustered Regional Energy Storage System"}

With the massive expansion of decentralised renewable energy in electricity grid networks, the power supply system has been changed from centralised to...

Charging and Discharging Strategies for Clustered Regional Energy Storage System

Published Online: Mar 31, 2022

Page range: 56 - 67

Received: Feb 17, 2022

Accepted: Mar 03, 2022

DOI: https://doi.org/10.2478/pead-2022-0005

Keywords
charging/discharging strategies, energy storage system, energy-to-power ratio, fuzzy logic control

© 2022 Yang Li et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Charging and Discharging Strategies for Clustered Regional Energy Storage System

Published Online: Mar 31, 2022

Page range: 56 - 67

Received: Feb 17, 2022

Accepted: Mar 03, 2022

DOI: https://doi.org/10.2478/pead-2022-0005

Keywordscharging/discharging strategies, energy storage system, energy-to-power ratio, fuzzy logic control

© 2022 Yang Li et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
charging/discharging strategies, energy storage system, energy-to-power ratio, fuzzy logic control