An accurate calculation method of line loss based on reconstructing a photovoltaic output curve by daily cumulative power generation

被引：0
作者：
Qiao, Hui [1 ]
Han, Jinglin [2 ]
Li, Zheng [1 ]
Jiang, Yu [3 ]
Han, Tianhua [1 ]
Feng, Tao [1 ]
机构：
[1] State Grid Xingtai Power Supply Company, Xingtai
[2] State Grid Hebei Electric Power Co., Ltd., Shijiazhuang
[3] State Grid Xiongan New Area Power Supply Company, Baoding
来源：
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | 2024年 / 52卷 / 24期
基金：
中国国家自然科学基金;
关键词：
distribution network; dynamic time warping (DTW); forward-backward sweep flow method; line loss; photovoltaic power generation; spectral clustering;
D O I：
10.19783/j.cnki.pspc.240599
中图分类号：
学科分类号：
摘要：
After the distributed photovoltaic access to the distribution network, there is a large deviation in the calculation of line loss using the traditional algorithm. Therefore, a classification and reconstruction method of a photovoltaic output curve based on daily cumulative power generation is proposed to approximately restore daily output curve. The obtained daily output curve data is used in the improved forward-backward sweep power flow method based on voltage correction to calculate the line loss of the network. Firstly, data preprocessing is carried out, and an improved spectral clustering (SC) algorithm model based on limited dynamic time warping distance (LDTW) is established. The standardized PV output curve is clustered, and the typical output modes in different seasons and weathers are obtained. Secondly, the daily cumulative power generation data collected by the power acquisition meters are classified and the output curve is linearly reconstructed. Finally, the reconstructed output curve is sampled, and the improved forward-backward sweep power flow method based on voltage correction is used to calculate the line loss of distribution network. Cases are verified based on the IEEE 33-node system, and the results are compared with the line loss results calculated by the actual photovoltaic output curve. The example shows that this method can accurately estimate line loss of distributed network by only using the daily cumulative power generation data of photovoltaic meters. © 2024 Power System Protection and Control Press. All rights reserved.
引用
收藏
页码：161 / 168
页数：7
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