# Optimal Configuration of User-Side Energy Storage for Multi-Transformer Integrated Industrial Park Microgrid

^{1}

^{2}

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## Abstract

**:**

## 1. Introduction

## 2. The Structure of User-Side Multi-Transformer-Integrated Microgrid

## 3. Optimal Configuration of User-Side Decentralized ESS under Multi-Transformer

#### 3.1. ESS Constraints under Multi-Transformer

_{i}is a binary variable, if n

_{i}= 1, it means that there is an ESS installed under the ith transformer, and if n

_{i}= 0, it indicates that there is not an ESS installed under the ith transformer:

#### 3.2. Economic Benefit Analysis of Industrial Park with ESS

## 4. Planning Parameter Description of ESS

#### 4.1. PV Outputs in Different Months

^{2}, as shown in Figure 3, which shows the monthly statistics of light and power generation in the area, based on NASA satellite monitoring data.

#### 4.2. Typical Daily Load Characteristics

#### 4.3. Description of Other Parameters

## 5. Numerical Analysis

#### 5.1. Economic Analysis of Decentralized ESS

#### 5.2. Optimal Configuration Analysis of Decentralized ESS under Different Return on Investments

## 6. Conclusions

- (1)
- ESS can effectively lower electricity and demand costs of industrial parks, which fall by 11.90% and 19.35%, respectively, in contrast to those without the installation of ESS.
- (2)
- It is important to take into account the location optimization of ESS in multiple-transformer-integrated industrial park microgrids. The ROI and annualized investment are in conflict with each other, which should be considered simultaneously in ESS planning.
- (3)
- The installation of ESS can help industrial parks accommodate PV power. PV becomes less accommodating as the annual net return rises. This is due to the fact that a low ESS configuration capacity is correlated with a high yearly net return, which lowers the amount of accommodation, and the PV accommodation level increases from 84.68% to 88%.
- (4)
- As for an industrial park, ESS configuration is not the more the better. This also verifies the necessity to optimize ESS in industrial parks with PV.

## Author Contributions

## Funding

## Data Availability Statement

## Conflicts of Interest

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**Figure 7.**Charging and discharging curves of each ESS under different typical days. (

**a**) ESS characteristic below transformer1; (

**b**) ESS characteristic below transformer2; (

**c**) ESS characteristic below transformer3.

**Figure 8.**Power curves of gateway meter during typical days of different months. (

**a**) March; (

**b**) July; (

**c**) November.

**Figure 9.**Uplink and downlink power of different transformers throughout workdays, rainy days, Saturdays, and Sundays. (

**a**) Uplink and downlink power of transformer1; (

**b**) uplink and downlink power of transformer2; (

**c**) uplink and downlink power of transformer3.

Scenario | ${\mathit{\delta}}_{1}$ (%) | ${\mathit{\delta}}_{2}$ (%) | $\mathit{L}{\mathit{f}}_{\mathit{I}}$ (104 RMB) | $\mathit{f}$ (104 RMB) | ${\mathit{f}}_{1}-{\mathit{f}}_{2}$ (104 RMB) | ${\mathit{f}}_{\mathit{D}1}-{\mathit{f}}_{\mathit{D}2}$ (104 RMB) | ESS1 (kWh) | ESS2 (kWh) | ESS3 (kWh) |
---|---|---|---|---|---|---|---|---|---|

1 | 11.45 | 23.95 | 44.89 | 5.14 | 51.15 | 20.97 | 218 | 0 | 0 |

2 | 11.40 | 23.90 | 44.89 | 5.12 | 51.17 | 20.97 | 0 | 218 | 0 |

3 | 11.32 | 23.82 | 44.89 | 5.08 | 51.20 | 20.97 | 0 | 0 | 218 |

4 | 11.50 | 24.00 | 44.89 | 5.16 | 51.12 | 20.97 | 132 | 86 | 0 |

5 | 11.51 | 24.01 | 44.89 | 5.17 | 51.12 | 20.97 | 151 | 0 | 67 |

6 | 11.48 | 23.98 | 44.89 | 5.15 | 51.13 | 20.97 | 0 | 132 | 85 |

7 | 11.52 | 24.02 | 44.94 | 5.18 | 51.10 | 20.97 | 121 | 49 | 47 |

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## Share and Cite

**MDPI and ACS Style**

Chen, W.; Chen, J.; Xu, B.; Cong, X.; Yin, W. Optimal Configuration of User-Side Energy Storage for Multi-Transformer Integrated Industrial Park Microgrid. *Energies* **2023**, *16*, 3115.
https://doi.org/10.3390/en16073115

**AMA Style**

Chen W, Chen J, Xu B, Cong X, Yin W. Optimal Configuration of User-Side Energy Storage for Multi-Transformer Integrated Industrial Park Microgrid. *Energies*. 2023; 16(7):3115.
https://doi.org/10.3390/en16073115

**Chicago/Turabian Style**

Chen, Wengang, Jiajia Chen, Bingyin Xu, Xinpeng Cong, and Wenliang Yin. 2023. "Optimal Configuration of User-Side Energy Storage for Multi-Transformer Integrated Industrial Park Microgrid" *Energies* 16, no. 7: 3115.
https://doi.org/10.3390/en16073115