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Energy Loss Analysis of Distributed Rooftop Photovoltaics in Industrial Parks

Yu Xiao1,2, Kai Li1,2, Hongqiao Huang1,2, Haibo Tan1,2, Hua Li3,*
1 State Grid Hunan Electric Power Corporation Limited, Changsha, China
2 Hunan Province Key Laboratory of Intelligent Electrical Measurement and Application Technology, Changsha, China
3 Hunan Institute of Metrology and Inspection, Changsha, China
* Corresponding Author: Hua Li. Email:
(This article belongs to this Special Issue: Key Technologies of Renewable Energy Consumption and Optimal Operation under "Dual Carbon Targets")

Energy Engineering 2023, 120(2), 511-527.

Received 24 March 2022; Accepted 06 June 2022; Issue published 29 November 2022


The analysis of the loss of distributed photovoltaic power generation systems involves the interests of energy users, energy-saving service companies, and power grid companies, so it has always been the focus of the industry and society in some manner or another. However, the related analysis for an actual case that considers different cooperative corporations’ benefits is lacking in the presently available literature. This paper takes the distributed rooftop photovoltaic power generation project in an industrial park as the object, studies the analysis and calculation methods of line loss and transformer loss, analyzes the change of transformer loss under different temperatures and different load rates, and compares the data and trend of electricity consumption and power generation in industrial parks before and after the photovoltaic operation. This paper explores and practices the analysis method of the operating loss of distributed photovoltaic power generation and provides an essential reference for the benefit analysis and investment cost estimation of distributed photovoltaic power generation systems in industrial parks. The analyzed results reveal that the change loss is stable after the photovoltaic is connected, and there is no additional transformer loss. And before and after the photovoltaic system installation, there was no significant change in the total monthly data difference between the total meter and the sub-meter.


Distributed photovoltaic generation; line loss; transformer loss; power generation

Cite This Article

Xiao, Y., Li, K., Huang, H., Tan, H., Li, H. (2023). Energy Loss Analysis of Distributed Rooftop Photovoltaics in Industrial Parks. Energy Engineering, 120(2), 511–527.

This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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