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1.香港中文大学(深圳)理工学院,广东省深圳市 518172
2.深圳市大数据研究院,广东省深圳市 518172
3.浙江大学电气工程学院,浙江省杭州市 310027
4.南瑞集团有限公司(国网电力科学研究院有限公司),江苏省南京市 211106
刘国龙(1995—),男,博士研究生,主要研究方向:人工智能、智能电网数据分析、数据安全性评估。E-mail:guolongliu@link.cuhk.edu.cn
赵俊华(1980—),男,通信作者,副教授,博士生导师,主要研究方向:电力系统分析与计算、智能电网、电力市场、数据挖掘、人工智能。E-mail:zhaojunhua@cuhk.edu.cn
文福拴(1965—),男,教授,博士生导师,主要研究方向:电力系统故障诊断与系统恢复、电力经济与电力市场、智能电网与电动汽车。E-mail:wenfs@hotmail.com
收稿日期:2020-05-05,
修回日期:2020-09-06,
网络出版日期:2020-11-08,
纸质出版日期:2020-12-25
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刘国龙,赵俊华,文福拴等.面向配用电侧负荷数据的深度端到端超分辨率感知方法[J].电力系统自动化,2020,44(24):28-35.
LIU Guolong,ZHAO Junhua,WEN Fushuan,et al.Deep End-to-end Super-resolution Perception Method for Load Data at Distribution Side[J].Automation of Electric Power Systems,2020,44(24):28-35.
刘国龙,赵俊华,文福拴等.面向配用电侧负荷数据的深度端到端超分辨率感知方法[J].电力系统自动化,2020,44(24):28-35. DOI: 10.7500/AEPS20200505018.
LIU Guolong,ZHAO Junhua,WEN Fushuan,et al.Deep End-to-end Super-resolution Perception Method for Load Data at Distribution Side[J].Automation of Electric Power Systems,2020,44(24):28-35. DOI: 10.7500/AEPS20200505018.
在智能电网中,精准的数据采集是整个系统安全与经济运行的基础。随着信息与物理系统融合的不断加深,各类大数据应用与实时控制等任务对采集高频数据的要求不断提高。然而,提高数据采样频率必然给系统造成更高的数据通信与存储负担。文中提出了一种基于深度学习的超分辨率感知技术,用于从低频采样的传感器数据中恢复精确的高频数据。具体地,提出了一种基于门控循环单元网络的深度端到端超分辨率感知方法,包括特征提取、关系推断、信息重建3个部分。特征提取部分采用一维卷积网络对低频数据进行特征提取;在关系推断部分应用门控循环单元网络对获得的特征进行学习,推断低频数据同高频数据间内在关系;在信息重建部分则使用全连接层对推断信息进行重建,获得对应的高频数据。采用所提方法对居民用户和工业用户功率数据及输电线电压数据进行超分辨率感知,同时使用恢复的高频数据进行负荷状态识别。算例结果表明所提方法能够精准有效地恢复低频数据的丢失信息并提升负荷识别等实际应用的准确性。
In smart grid
accurate data acquisition is the basis of the whole system security and economic operation. With the deepening integration of cyber-physical systems
the requirements of various big data applications and real-time control tasks for the acquisition of high-frequency data are keeping rising. However
increasing the data sampling frequency will inevitably cause higher data communication and storage burden to the system. In this paper
a deep learning based super-resolution perception technology is proposed to recover accurate high-frequency data from low-frequency sampled sensor data. Specifically
a deep end-to-end super-resolution perception method based on the gated recurrent unit (GRU) network is proposed
which includes feature extraction
relationship inference and information reconstruction. In the feature extraction part
an one-dimensional convolution network is used to extract the features of low-frequency data. In the relation inference part
the GRU network is used to learn the obtained features to infer the internal relationship between the low-frequency data and the high-frequency data. In the information reconstruction part
the inferential information is reconstructed with the full connection layer to obtain the corresponding high-frequency data. The proposed method is used for super-resolution perception of the power data of residential and industrial users and the voltage data of transmission lines
and the recovered high-frequency data is used for load state identification. The example results show that the proposed method can accurately and effectively recover the lost information of low-frequency data and improve the accuracy of practical applications such as load identification.
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